Key Takeaways

• Average Costs: A single-storey extension typically costs between £30,000 and £140,000, while a two-storey extension ranges from £108,000 to £180,000.
• Cost per Square Metre: Expect to pay between £1,800 and £3,500 per m² for a single-storey extension, and £1,650 to £3,250 per m² for a two-storey extension.
• Additional Expenses: Budget for 10–15% of the total project cost for professional fees, including architects, planning permissions, and structural engineers.
• Regional Variations: Costs can be higher in areas like London and the South East, with single-storey extensions ranging from £2,300 to £3,400 per m².
• Return on Investment: A well-executed extension can increase your property’s value by 10–20%, depending on the quality and design.

House Extension Cost: 2024 Price Comparison UK

 

Asking, ‘How much does a house extension cost?’ is like asking, ‘How long is a piece of string?’ There is no one simple answer because the question fails to address the variables involved.

For example, you can use an extension cost calculator to give you a rough estimate, but without an understanding of the extension rules, regulations, and costs, you are likely to miss out on various elements of the equation, leaving you with an inaccurate and unrealistic final price.

However, the average cost for a 20-metre square house extension in the UK in 2022 is £44,000.

In this article, we will explain in more detail where that cost comes from, what a house extension entails, and some additional costs you need to consider.

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How to Determine House Extension Costs

 

To know how much your house extension would cost, you need to be clear on those variables and how they relate to you. These variables can be boiled down to the following:

• The Type of the Extension: The nature of your extension, be it a single-storey, double-storey, conservatory, or loft conversion, greatly influences the costs. Each type comes with its unique requirements and materials, affecting the budget accordingly.
• The Size of the Extension: The square footage of your extension directly correlates with the overall cost. Larger extensions naturally demand more resources, materials, and labour.
• The Type of the Property: The structure of your existing property plays a substantial role in determining costs. For example, adding an extension to a period property may require specialised materials and skilled craftsmanship, potentially increasing expenses.
• The Location of the Property: Location is a pivotal factor, especially if your property is situated in a metropolis like London. Construction costs can significantly vary between regions, primarily due to differences in labour, materials, and local regulations.
• The Contractors You Use: Unless you have the expertise and resources to undertake a DIY extension, the choice of contractors is paramount. Experienced professionals may come at a higher cost but often ensure quality workmanship, saving you money in the long run. It’s advisable to obtain multiple quotes and thoroughly check their credentials before making a decision.

Other concerns include:

• Planning Permission: Depending on the nature and size of your extension, you might require planning permission.
• Fire Regulations: Safety regulations, especially concerning fire safety, should not be overlooked.
• Insurance: It’s vital to discuss your project with your home insurance provider to ensure your extension is adequately covered during the construction phase.
• Estimates and Substitutions: Sometimes, during the project, you may need to make changes or substitutions.
• VAT (Value Added Tax): VAT applies to most construction work in the UK, but some house extensions may qualify for a reduced 5% rate instead of the standard 20%.
• Fixtures & Fittings: The choice of windows, doors, and other fixtures can significantly impact your budget. High-quality, energy-efficient fixtures might initially cost more but can lead to long-term savings.
• Finishing Touches: The final touches, including interior and exterior finishes, landscaping, and interior design, should not be underestimated.

Determining house extension costs in the UK requires careful planning, research, and consultation with professionals. By defining your project scope, understanding local building costs, and accounting for various factors, you can create a more accurate budget for your house extension project.

Is a House Extension the Best Option for My Home?

 

When considering home improvement projects, such as expanding your living space, it’s crucial to evaluate whether a house extension is the best option for your home. While extensions can be an excellent way to accommodate growing families or enhance your property’s value, they may not be suitable for every situation.

Here are some key factors to consider when determining if a house extension is the right choice for your UK home:

• Your Space Needs: Assess your current and future space requirements. If you find your home consistently cramped or are planning for a significant lifestyle change, such as working from home, an extension could provide the extra space you need.
• Budget: Extensions can be a substantial financial investment. Before committing to the project, carefully assess your budget and ensure you have adequate resources to cover not only construction costs but also any unforeseen expenses.
• Local Regulations: Investigate local planning and building regulations. Certain areas may have restrictions on the type and size of extensions permitted. Ensure your proposed extension complies with these regulations to avoid legal issues and delays.
• Architectural Compatibility: Consider whether the architectural style and design of your extension will harmonize with your existing home. A well-integrated extension can enhance your property’s visual appeal and value.
• Duration of Stay: If you intend to move shortly the only reason to extend your home is to add value to the property. If this is the case, you need to make sure that you have not already reached your ceiling price.
  

  If it is your forever home, or you are planning on staying put for the foreseeable future, house extensions offer many benefits.

• Environmental Impact: Think about the environmental implications of an extension. Energy-efficient designs and materials can reduce your home’s carbon footprint and running costs in the long run.
• Professional Guidance: Consult with architects, builders, or other professionals to assess the feasibility of your project. They can provide valuable insights and cost estimates based on your specific needs and the condition of your property.

By carefully considering your space needs, budget, local regulations, architectural compatibility, and other factors, you can make an informed choice that aligns with your goals and enhances your home’s functionality and value. Consulting with experts in the field can provide you with the guidance and expertise needed to make the right decision for your unique circumstances.

Benefits of a House Extension

 

Expanding your home through a house extension offers several advantages, making it an appealing choice for homeowners. Here are some key benefits to consider:

1. No Moving Hassles

One of the most significant advantages of opting for a house extension is that it’s often more cost-effective than buying a new house. Not only do you avoid the substantial expenses associated with purchasing a new property, but you also steer clear of the logistical and emotional challenges of moving.

You can keep your current job, maintain your children’s school arrangements, retain your social connections with neighbours, and sidestep the stress that typically accompanies relocation.

2. You May Not Need Planning Permission

Many house extensions in the UK fall within permitted development rights, which means you may not need to go through the process of seeking planning permission.

While this is generally the case, some exceptions exist, so it’s essential to verify the regulations that apply in your local area. You can consult your local council’s website or seek professional advice to ensure you comply with the rules.

3. Customized Additional Space

A significant benefit of house extensions is the ability to tailor the added space to your precise needs. Whether you lack a utility room, desire a kitchen extension, or need extra bedrooms due to a growing family, a house extension allows you to create a layout that best suits your requirements.

You can craft a home that perfectly aligns with your lifestyle.

4. Make the Most of Your House

With a house extension, you have the opportunity to make the most of your property’s unique attributes. Suppose your kitchen faces the sunny Southeast, and you dream of extending it into a bright breakfast room.

Alternatively, you might have an unutilized picturesque view that you wish to incorporate into your living space. Collaborating with skilled professionals enables you to unlock your home’s potential and transform it into your dream living space.

5. Add Property Value

A well-executed house extension can significantly boost your property’s value, potentially adding up to 25% to its overall worth. While this estimation is based on an average-sized three-bedroom semi-detached house, house extensions often yield a solid return on investment.

By enhancing your home’s size and functionality, you not only improve your living conditions but also enhance its market value, making it an attractive prospect if you decide to sell in the future.

Types of House Extensions

 

House extensions come in various forms, each designed to serve specific purposes and cater to unique lifestyle needs. Whether you’re looking to add more living space, create a home office, or accommodate a growing family, understanding the different types of house extensions available is crucial for making informed decisions.

The type of extension you are considering will significantly affect the overall cost.

The cheapest kinds of extensions are the addition of a conservatory, at around £6,250 upwards, depending on the size and the materials used. Other cost-effective options are loft or garage conversions, which often work out cheaper than building an extension. However, these options may not apply to you, depending on the size, age, location, and design of your property.

Here are some of the most common types of house extensions in the UK.

Type 1: Single-Storey Extension

 

A single-storey extension involves expanding the ground floor of your home either to the rear or side. This type of extension is versatile and can be used to create a larger kitchen, a dining room, a living area, or even a home office. It’s a popular choice for homeowners looking to maximize space without dramatically altering the property’s exterior.

How much does a single-storey extension cost?

A single-storey house extension cost can vary greatly depending on where you live, and the quality of the materials and design, but UK guide prices in 2022 are as follows:

• Small Single-Storey Extension – £36K to £52K
• Medium Single-Storey Extension – £56K to £76K
• Large Single-Storey Extension – £90K to £130K

These prices do not include VAT (an extra 20% of the fee) or design/architecture costs which can add another £500 – £1,000 to your total. Planning permission can cost up to £200 to obtain from your local authority, although it is not always needed for an extension, whilst building regulations can cost you up to £500 in some cases.

However, as the top-end estimate of the small extension is close to the lower price for a medium-sized extension and so on, experts advise you to pay for the largest size you can afford, rather than paying more for a small but fancier extension. After all, it is the space that will add value to your home.

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Type 2: Two-Storey Extension

A two-storey extension adds a floor to an existing building, typically a residential property. This extension is designed to provide extra living space or accommodate additional rooms on both levels, offering significant room for expansion and customization.

If your ultimate plan is to build two storeys, as a general rule it will be cheaper to save up and build the whole extension at the same time.

How much does a two-storey extension cost?

Two-storey extensions cost around 1.75 times the cost of single-storey extensions for the materials, but you also need to factor in labour costs being almost doubled.

You may also incur other costs, such as the need to build the same kind of roof as that of the main house – more info about new roof costs. There is also the question of whether the foundations are suitable to support the additional weight.

Additional costs include scaffolding and other structural support. The build will already include new walls and floor joists.

Type 3: Kitchen or Bathroom Extension

 

A kitchen or bathroom extension involves expanding or adding a new section to your existing property to create additional space for a larger and more functional kitchen or bathroom. These extensions often enhance the property’s value and cater to modern living needs, offering more convenience and comfort for homeowners.

How much does a kitchen or bathroom extension cost?

With a kitchen or bathroom extension, you need to factor in plumbing and electricity costs, around £3,500 – £11,500 for a bathroom and £8,000 – £29,000 for a kitchen, but these are basic figures that don’t take into account the vast difference in prices for different designs, layouts, and finishes. You will also need to make sure the work complies with UK Water Regulations.

A bathroom extension will take longer and cost more (around £2,500-£5,000) due to the need for complicated plumbing etc.

You need to add £10,000 – £25,000 to the average house extension cost for a kitchen extension. This is also due to plumbing and electrics, plus you may need to buy a new gas boiler which will cost around £2,000.

Type 4: Bungalow Extension

A bungalow extension expands the living space of a single-story residential building known as a bungalow. It typically involves adding extra rooms, creating additional functionality, or enhancing the existing structure to meet the homeowner’s specific needs.

As with a two-storey extension, you will need to match the original roof. On the flip side, many bungalows cannot support another storey, as they don’t have the foundations to do so, so extending outwards could be your only option.

How much does a bungalow extension cost?

Bungalows are single-storey properties, so extending outwards or upwards usually costs similar to a single-storey extension, around £1,100 – £1,400 per square metre.

However, bungalows sometimes have interior walls which are not structural and can take some of the labour costs away from a usual single-storey extension.

Type 5: Garden Room Extension

 

A garden room extension is a different kind of house extension since it is not attached to the main property.

A useful extra space that is built to be well insulated and a pleasant temperature no matter the season, garden rooms are versatile and a year-round investment.

How much does a garden room extension cost?

A garden room extension cost is around the same as a bungalow extension since both are single-storey ground-level extensions. Extra costs may occur if there is a problem with the ease of access.

Type 6: Side Extension v Rear Extension

Since the primary calculation for extension costs is by the floorspace, it doesn’t have much bearing on the cost whether you are planning a side extension or rear extension.

How much does a rear extension cost?

A single-storey rear extension is likely to be around the same price as a single-storey side extension, depending on the materials and other factors such as how the extension is integrated into the main property. The number of doors and windows and whether a new kitchen or bathroom is being included will also affect the costs.

Type 7: Basement Extension

 

By far the most expensive type of house extension, basement extensions are a great way to create more space where space is at a premium. for this reason, they are becoming increasingly popular in the UK over the last couple of years. The basement probably isn’t the first place you think of extending, but if you are out of above-ground options, this may be your best option.

How much does a basement extension cost?

A basement extension costs more largely because of potential obstacles such as tree roots and pipes that need to be moved. You need specialist builders to perform these tasks so this type of extension is not suitable for DIY. A basement extension costs around £100,000 – £160,00, based on 40 metres square area.

Type 8: Flat-Pack Extension

The cheapest house extension is a flat-pack extension or a prefab extension. A prefab extension is a ready-built extension that is delivered to be assembled in around a week. Flat-pack extensions are on the same premise but may need some building work before they can be connected to your home.

How much does a flat-pack extension cost?

Between £1,260-£1,680 per square metre on average. That means a single-storey flat-pack extension cost works out at £19,950-£26,250 at around 15 square metres.

If you’re going larger (up to 20 square metres) the increase in cost will take it up to £26,250-£35,350. Lastly, by choosing a grand prefab extension of up to 25 square metres, you should expect to pay £32,550-£43,750.

This cost includes VAT but not the fixtures and fitting. Material costs will depend on your taste and the purpose of the extension.

Step-by-Step Guide for House Extensions

 

You’ve decided to go ahead with your house extension project. Here are the next steps:

Step1: Determine Your Budget

House extension costs can vary significantly, depending on the type and scale of the project. To start, establish a realistic budget that aligns with your financial capacity. Ensure you consider not only the construction costs but also any potential unexpected expenses that may arise during the project.

House extension costs can range from around £7,500 at the lower end for a garage conversion right up to £160,000 to extend your basement.

Step 2: Understand the Types of House Extensions

House extensions come in various forms, each with its unique costs and considerations. Common types include single-storey extensions, double-storey extensions, loft conversions, garage conversions, and basement extensions. Be clear about your specific needs and the type of extension that best suits your goals.

Step 3: Obtain Multiple Quotes

To get a more accurate picture of your potential costs, reach out to local contractors or builders. Request quotes from at least three reputable professionals who specialize in house extensions. These initial quotes should be free and obligation-free. Ensure that the quotes are detailed, breaking down costs for materials, labour, and other potential expenses.

Step 4: Compare Quotes

Once you have gathered quotes, carefully compare the price range provided by different contractors. Pay attention to the level of detail in the quotes and the quality of materials and workmanship each contractor offers. A comparison will help you understand the potential range of costs for your project.

Step 5: Calculate the Cost per Square Foot

House extension costs are often measured in square footage. Calculate the cost per square foot for each quote you receive. This calculation will give you a better understanding of how much you’re paying for the additional space.

Step 6: Weigh Costs against Value Added

Consider how the estimated costs of your house extension align with the potential value it can add to your home. A well-executed extension can increase your property’s market value significantly. Weigh these prospective gains against the project’s expenses to make an informed decision.

Keep in mind that adding value to your property can be an excellent long-term investment, making the cost of the extension a worthy consideration.

Type of Extension by Quality	Size per Square Metre	Low Cost (+VAT)	Average Cost (+VAT)	High Cost (+VAT)
Basic Extension Cost	20 Square Metre	£36,000	£44,000	£52,000
Standard Cost (Small Extension)	20 Square Metre	£36,000	£44,000	£52,000
Standard Cost (Medium Extension)	30 Square Metre	£52,000	£66,000	£76,000
Standard Cost (Large Extension)	50 Square Metre	£90,000	£110,000	£130,000
Premium Extension Cost	30 Square Metre	£75,000	£90,000	£105,000

It’s essential to be well-informed and have a clear financial plan before embarking on this exciting home improvement journey.

House Extension Cost Calculator

 

Your total extension cost is the sum of various elements.

Stage of ExtensionPrice RangeArchitectural drawings £500 – £1,000Planning Permission £200Building Regulations Survey£300-£500Groundwork CostsDiffer depending on drain removal/tree roots and any other obstaclesConstruction CostsVary according to the type of extension as described above Fitting CostsAgain depend on choices such as a budget option versus bifold doors etcNew Kitchen£8,000 – £29,000New Bathroom£3,500 – £11,500

1. Location, Location, Location

Where you live vastly impacts the price you will pay for an extension. Those living in London, the South East, or the East Midlands can expect to pay at least £20,000 extra. It can also affect the ceiling price of your home, so be sure to check with a local estate agent to make sure your property isn’t already at its ceiling price before you consider an extension.

2. Quotes

We’ve all heard the saying you can only pick two from ‘good/fast/cheap’ and it applies, to a degree, in building an extension. However, it is possible to find a balance, and the more prepared you are, the better chance you have of sticking within your budget.

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As with all aspects of house building, buying, or development, research is key – you should shop around for quotes and compare service reviews from at least three reputable firms before choosing your builders. You should also be working with a qualified architect, particularly for more ambitious extensions.

3. VAT

Once you have your quotes, don’t forget to take VAT into account (around 20%) of the fee, and then try to leave some wiggle room in your budget for unforeseen circumstances or necessary substitutions.

Local tradespeople may not be VAT registered, so you can potentially avoid the 20% VAT on labour costs. However, the VAT will still be applied to all materials used in your home extension.

Finally, make sure you’ve accounted for fixtures, fittings, and finishing touches in your budget. Chances are you will need windows and doors in your extension, and these items can prove much more costly than you might anticipate, particularly if they need to be anything other than the standard size. You also don’t want to get to the end of your extension and find you can’t use it because you left nothing in the budget for furnishings.

4. Other Concerns

Planning Permission

You must make sure you have planning permission from your local authority before you extend either upwards or outwards. That includes getting permission to cut down trees, as many are protected by Tree Preservation Orders and could see you landed with a hefty fine if you do not obtain the proper permission.

Party Wall Agreement

You may also need a Party Wall Agreement with your neighbour, which can cost up to £1,000, plus the surveyor’s hourly rates of £150-£200.

Fire and Safety Regulations

Also, make sure any new building work meets fire and safety regulations, and update your insurance to reflect the new size of the property.

All in all, an extension can be a cost-effective way to add extra space to your home (as opposed to moving home) but a good-quality extension will still cost you a significant amount of money, not to mention the disruption to your daily life. Therefore, you should never undertake an extension lightly, and should always be as clued-up as possible about the costs and regulations involved.

To help you out, we’ve answered a couple of frequently asked questions, below.

Frequently Asked Questions

Is it Cheaper to Extend or Build Up?

On average, the cost of a single storey extension is cheaper than a double storey extension cost (an estimated 30%).

Extending Upwards

Building up usually requires more structural work. For a start you’ll need to remove the roof to build upwards.

Then there’s the scaffolding and the extra strengthening that may be needed to accommodate the extra work. That’s if the property is suitable for adding another floor, as many aren’t.

For example, bungalows are usually designed to support only one storey, so adding another storey to the existing structure could be met with all kinds of issues. However, bungalows often have non-structural inside walls which can help you to extend outwards.

Extending Outwards

Extending outwards could be a low-cost option if it is the form of a conservatory or a simple timber-framed extension, on which you will save money in reduced labour time.

Of course, depending on your property and its location, you may not have the option of extending outwards. You may not be able to get planning permission for cutting down trees, you may simply not have the required space, or you might not have land suitable for building on (such as a steep slope), which would add extra costs to an extension, even if it was a viable option.

Still, there are significant benefits to adding a double-storey extension, which could add an estimated 30% to 60% to the value of your home, particularly if it is in the form of a double bedroom and en-suite bathroom.

Does an Extension Always Add Value?

In most cases, adding living space to your house in the form of an extension will increase its value. However, there are a few circumstances where this is not the case.

Street Market Value

If your house is already priced at the top end of the market for your street or area, an extension will not mean buyers will pay more, so you haven’t added any value and are unlikely to recoup the costs of the extension even if you do manage to sell.

You should, therefore, check with a qualified estate agent what the house’s ‘ceiling price’ is before you go ahead with an extension.

Site Specific Costs

You also need to take into account other costs such as extra work being required due to the size/location of the property – for example, the sloping ground will require foundations to be laid.

Kerb Appeal

There’s also a question of taste and quality. A conservatory is a very popular extension, but using cheap or unattractive materials can detract from the overall value of your property.

Common Sense Additions

Common sense and convenience are also factors, for example, an additional bedroom with no en-suite and restricted access to the main bathroom make it less than buyer-friendly.

Planning Permission

If you are planning to sell the property in the near future, securing the planning permission for an extension for the next occupants could make the property more desirable to potential buyers, without you having to actually pay for the extension, not to mention undergoing the disruption such work inevitably causes.

Is it Better to Extend or Move?

Both have their advantages and disadvantages, so it all depends on what is going to benefit you the most.

Points to consider include:

Disruption Considerations

If you need more living space because your family is expanding, for example, you need to weigh up the cost and disruption of an extension versus the cost and disruption of moving house.

House and Area Needs

You also need to consider whether the house and the area you live in meet all your other needs. If the only issue with the house is that you have run out of useable living space then an extension could be the answer. On the other hand, if you don’t see yourself living in the property long-term then it may be time to move.

Budget

Your budget also factors in. You may be able to raise the cash needed for an extension easier than you can fund a move to a bigger house. However, in both cases, you need to understand all the costs involved in each course of action.

Value Add vs. Area Amenities

An extension will (usually) add value to your home, as well as space, but if the property or area is not meeting your needs in other ways – such as school districts, commuting time, or the lack of a garden, for example, extending the property may not add as much value to your life as moving to a better-suited property or area would.

How Long Do House Extensions Take to Build?

The scale of your extension project will be the determining factor of how long it takes to complete the build. Once you’ve got through the planning and permissions stage (which can take months) you are probably looking at between three and four months for most extensions.

Complex projects can take much longer. Work can be stopped by bad weather or unforeseen complications so delays are common. Delays also have a knock-on effect with different functions. Eg the plumber’s delay has delayed the plastering which can not be completed until the plumbing is finished.

What is the Cheapest Way to Build an Extension?

The cheapest way to build an extension is to build it yourself, however, this is only true if you have the required skills to do so.  Never attempt plumbing, electrical work, or major structural work unless you are fully qualified to do so.

Attempting DIY above your skill level can be dangerous and end up costing you more when you have to pay professionals to fix your mistakes. You should always work with qualified builders, plumbers & electricians (if necessary) architects, and estate agents when planning an extension.

Here are a few ways you can keep your extension costs low:

1. Be Your Project Manager

However, if you have done your research properly and have the time, you can be your own project manager – saving 15 to 20 per cent of a builder’s fee.

2. Bear in Mind all the Rules and Regulations

Securing all the appropriate planning permissions and brushing up on building and fire regulations is also essential in saving you money. You can be heavily fined for cutting down a tree without permission, and you may need to spend more money to get your extension to comply with building and fire regulations after the fact if you have cut corners during the build.

3. Keep it Simple

Keeping the design simple is one way to build an extension on a tight budget – a square extension with a simple pitched roof is much cheaper than adding angles, curves, or other custom design features which will incur a higher cost.

Choose Your Construction Materials Carefully

Your choice of materials will also significantly affect the cost of your extension. Stick to off-the-shelf rather than anything you have to order specially. If you have the expertise to do so, using reclaimed materials can also save you a lot of money.

Make sure your initial budget includes post-build costs such as fixtures, fittings, and furniture, which will encourage you to stay within it on the initial build.

Also, prioritise and budget accordingly, for example, if you really need a specific expensive custom-made sink, you may have to stick to standard lighting and sacrifice your first-choice flooring for a cheaper option.

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Is it Cheaper to do a Loft Conversion or an Extension?

The short answer is that a loft conversion is cheaper than an extension.

Average Cost

An average single-storey house extension is estimated to cost between £1,800 to £2,600 per square metre, whilst you are looking at between £750 to £1,800 per square metre, for a simple loft conversion.

Property Value Add

Converting the loft into an extra double bedroom and en-suite bathroom could add an average of 21 per cent to the value of a property, and 24.5 per cent in London. However, a different kind of extension (such as a conservatory) may add value to the property for around £5,000 upwards, potentially giving you a greater return on your investment in the future.

Hidden Costs

The age and style of the property is also a factor, as converting a loft in a period property could have hidden expenses such as needing a full rewiring, or a new roof. On the other hand, extensions may also have hidden costs such as needing foundations lying on sloping ground and creating greater disruption to your life.

Disruption Considerations

One of the reasons loft conversions are so popular is that, on the whole, they are less disruptive than an extension. It depends on your reasons for converting/extending, and which option is most suited to your lifestyle.

When working out your house extension cost calculator, you need to factor in all, the above elements to answer the big question for yourself – which kind of extension is right for me?

If you would like to discuss your options, please get in touch for a free quote or just some friendly professional advice.

FAQs

What factors influence the cost of a house extension?

Key factors include the size of the extension, quality of materials, complexity of design, location, and any additional features like underfloor heating or bespoke finishes.

Do I need planning permission for a house extension?

Not always. Many extensions fall under permitted development rights, but it’s essential to check with your local council to ensure compliance.

How can I reduce the cost of my extension?

Consider opting for standard materials, simplifying the design, and obtaining multiple quotes from reputable builders.

What are the hidden costs associated with house extensions?

Additional costs may include VAT, insurance, utility connections, landscaping, and potential unforeseen issues during construction.

How long does it take to complete a house extension?

Depending on the project’s complexity, a single-storey extension can take 3 to 6 months, while a two-storey extension may take 6 to 9 months.