House Extension Projects

As our lives change, so do our homes. Building an extension can be a wise and rewarding decision, whether it's a growing family, a need for more space to work from home, or a desire to add value to your property.

Extensions offer the opportunity to expand your living space, create new rooms, and enhance the functionality and flow of your home.

They can also provide your property a fresh new look and feel, allowing you to create a unique space that reflects your style and personality. With the right design and construction team, building an extension can be a seamless and enjoyable process, resulting in a beautiful and functional new space that meets your specific needs and exceeds your expectations.

Single storey extensions:
A single-storey extension is a popular option for homeowners looking to expand their living space without compromising their garden or outdoor area.


One of the main benefits of a single-storey extension is that it can significantly increase living space, allowing for more room to entertain guests or accommodate a growing family.

This extension type is also cost-effective compared to other options, such as adding a second storey or converting the loft. Additionally, a single-storey extension can enhance the functionality of your home, providing extra space for a home office, gym, or a dedicated play area for kids.

From a design perspective, a single-storey extension can also improve the overall aesthetic of your home, adding a contemporary touch or blending seamlessly with the existing architecture.

Overall, a single-storey extension can add value to your property while creating a more spacious, functional, and enjoyable living environment for you and your family.

Two Storey Extensions
A 2 storey extension is an excellent option for homeowners looking for a more significant increase in living space and may not have the option to extend outward due to land constraints.


One of the main benefits of a two-storey extension is that it can add significant value to your property by increasing the overall square footage.

This extension can provide ample space for additional bedrooms, a larger kitchen or living area, or even a home office or gym.

A two storey extension can also provide greater flexibility in layout, allowing for more room to create separate zones or a more open-plan living space. Additionally, a two-storey extension can provide more privacy and separation between living spaces, making it an ideal option for larger families or those who frequently entertain guests.

From a design perspective, a two storey extension can enhance the overall look of your property, adding curb appeal and a modern touch.

Overall, a two storey extension can significantly increase living space, improve the functionality of your home, and add value to your property.

Here are some frequently asked questions about building house extensions, along with their answers:

The cost of a house extension can vary depending on various factors, such as size, complexity, and location. Generally, the cost ranges from £2,500 to £3,500 per square meter.

On average, a single-story extension can cost between £50,000 to £70,000, while a two-story extension can cost between £80,000 to £100,000+

Depending on the size and location of your proposed extension, you may need to obtain planning permission. However, some extensions can be carried out under permitted development rights, so you don’t need planning permission.

The duration of a house extension project depends on several factors, including the size and complexity of the project. Generally, a single-story extension takes around 3-4 months, while a two-story extension can take 4-6 months.

Yes, in most cases, you can continue to live in your home while the extension work is carried out. However, it may be necessary to move out temporarily during certain stages of the construction, such as when the roof is being replaced.

It is possible to carry out some aspects of the extension work, such as painting and decorating. However, hiring a professional builder is always advisable to ensure that the work is carried out to a high standard and meets all necessary regulations.

Adding an extension can increase the value of your property, especially if it adds extra living space and functionality to your home. However, the value will depend on various factors, such as the extension’s size, quality, and location.

If your proposed extension could affect your neighbor’s property, such as overshadowing or overlooking, you may need to notify them and obtain their consent.

This happens during the planning process.

While it’s possible to design your extension without an architect, hiring one can help you create a more functional, attractive, and cost-effective design. Architects can also help you obtain planning permission and a Building warrant.

Yes, you can incorporate various eco-friendly features into your house extension, such as solar panels, energy-efficient lighting, and insulation. These features can help reduce your energy bills and your carbon footprint.

At John Webster Architecture, we understand that extending your home can be a big decision, but we believe the benefits are worth it.

By choosing us to design your house extension, you can rest assured that you will receive a high-quality design tailored to your specific needs and preferences.

With our years of experience designing dozens of successful house extensions, we have the expertise to deliver a design that maximizes your living space while enhancing your home's overall look and feel.

Whether you want to create more living space for your family or increase the value of your property, we will work closely with you to ensure that your vision is brought to life.

By choosing John Webster Architecture for your house extension design, you can trust that your project is in good hands and look forward to enjoying your new and improved living space for years to come.