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How Much Does a House Extension Cost?

Updated: Mar 27

When it comes to house extensions, one of the first questions that homeowners often ask is, "How much does a house extension cost?" And it's a valid question. After all, a house extension is a significant investment that can add value and extra space to your home. But the cost of a house extension can vary depending on several factors.

Firstly, the size of the extension will play a role in the cost. It's important to consider not only the additional square footage you want to add but also any additional rooms or features you want to include. A larger extension with multiple rooms will naturally cost more than a smaller, single-room extension.

Secondly, the complexity of the project will also affect the cost. Factors such as the type of foundation required, the type of roof, and any structural changes or additions can all impact the cost. It's essential to consult with experienced builders in South London who can advise you on the best options for your specific project.

Single Story House Extension
Single Story House Extension

When it comes to pricing for house extensions, it's important to note that costs can vary significantly depending on various factors such as the size, complexity, location, and specific features of the extension. However, here are some average market prices to give you a general idea:

1. Small single-room extension:

On average, a small single-room extension can cost anywhere from £20,000 to £40,000. This typically includes basic construction work, such as foundations, walls, roofing, and basic finishes.

2. Medium-sized double-room extension:

A medium-sized two-room extension can cost between £40,000 and £80,000. This price range typically includes plumbing, electrical work, insulation, windows, and higher-quality finishes.

3. Large multi-room extension:

For larger extensions that include multiple rooms or additional floors, the cost can range from £80,000 to £150,000 or more. These extensions often involve more complex construction work, such as structural changes, additional plumbing and electrical work, and higher-end finishes.

It's important to keep in mind that these prices are rough estimates and can vary depending on factors like the location of your property, the complexity of the project, the materials and finishes used, and any additional features or customizations.

To get a more accurate estimate for your specific house extension project, it's recommended to consult with experienced builders or construction professionals. They can assess your requirements, evaluate your property, and provide you with a detailed quote based on your specific needs and preferences. We have extensive experience in designing and constructing various types of extensions, and we can work closely with you to understand your needs and create a tailored solution that fits your budget. You can learn more about our expertise by visiting our "About Us" page.

Remember, investing in a house extension is not just about the initial cost but also the long-term value it can add to your property. A well-designed and well-executed extension can significantly increase the market value of your home, making it a worthwhile investment in the long run.

Another factor that can affect the cost of a house extension is the location of your property. Building costs can vary between different areas, so it's essential to take this into account when budgeting for your project. Builders in South London, like Spaces4You, will have a good understanding of local building codes and regulations, which can help streamline the construction process and avoid any potential costly delays.

To give you an idea of the potential cost of a specific house extension, Spaces4You offer a convenient cost calculator on our website. This can serve as a useful starting point when planning your budget.

It's worth noting that while a house extension is certainly an investment, it can also add significant value to your property. Research has indicated that a well-designed and well-executed extension can increase the value of a home by as much as 20%. This is particularly true for loft conversions, which are becoming increasingly popular due to their ability to add both living space and value to a property.

Spaces4You offers a range of services, including loft conversions and new builds, in addition to our expertise in house extensions. Our team of professionals includes architects and designers who can work with you to create a unique and functional space that meets your specific requirements. You can learn more about our architecture and design services by visiting our dedicated page.

To learn more about house extensions, the specific costs involved, and the construction process, explore Spaces4You's informative articles on their "Building Extensions" and "Services" pages. You can also browse our project gallery to see examples of our previous work and gain inspiration for your own house extension project.

With the right team of professionals and careful planning, you can create an extension that meets your needs and exceeds your expectations. Contact Spaces4You today to discuss your house extension project and start turning your dreams into reality.



Cost of Extending a House in the UK:

The cost of extending a house in the UK can vary significantly depending on various factors such as the location, size of the extension, materials used, and the complexity of the project. A rough estimate for a basic single-storey extension could range from £1,200 to £1,500 per square meter.

Cheapest Type of House Extension:

Is it Worth Building an Extension?

Size of Extension Without Planning Permission:

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