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House Extension Professionals in London

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London / 25 mi
Architects & Architectural Designers
House Extensions
1 – 15 of 1,499 professionals
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1,499 Professionals

Featured Reviews for House Extension Professionals in London

TMDB - House Of Clarence
House Extension Professionals in London
Average rating: 5 out of 5 stars4 June 2026
“The team at the Market Design & Build have been great to work with on our house which includes architectural and structural changes. They have maintained our brief from the outset but have also been very adaptable in design development to suit our requirements as needed. Everyone in the team has been easy to work with and we were able to start our construction works on time despite planning permission and a tight timeline.”
Name Architects
House Extension Professionals in London
Average rating: 5 out of 5 stars23 December 2025
“From finding Name Architects on Houzz, we worked with Vaidas for a little over 2 years on a full refurbishment and extension of a terraced town house in Stoke Newington. Vaidas and his team allowed us to explore what was possible on a difficult site and brought their expertise to make the most of the space afforded, fitting in with our design brief. We are and were very pleased with the design and overall management of the build from start to finish. As first timers to renovation we appreciated the working relationship and guidance throughout the process, so much so we have referred Name Architects to multiple people and plan to keep doing so!”
James Pooley Architecture
House Extension Professionals in London
Average rating: 5 out of 5 stars5 December 2025
“Working with an architect was something we had only done once before. James listened to what we had in mind and came up with suggestions, solutions and some really great ideas. What we have now is a great addition to our house and tbh we have James to thank for the creative foresight.”
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Architect or Architectural Designer FAQs
A house extension is a construction process that involves expanding the footprint of your existing home. This could be extending outwards, either to the side or rear of the house, or upwards by adding another storey. House extensions provide extra living space and can significantly increase the value of your property.

House extensions can be categorised based on direction, structure and function. The main types include rear extensions, side return extensions, wrap-around extensions, and double or single-storey extensions. More specific ones could be kitchen extensions, loft conversions, basement conversions, garage conversions or conservatories. Select the type that best suits your property and meets your space needs, if you are unsure, speaking with a local home extension builder in London.

Generally, house extensions are worth the investment. They provide additional living space and can dramatically increase the resale value of your home, often covering the initial investment cost. However, plan carefully and choose a reputable house extension builder to ensure a high-quality build that will add value to your property.

The cost of a house extension can vary significantly based on several factors, such as the size, complexity of the design, quality of materials used, and geographical location. However, as a rough estimate, a single-storey extension can range from £1,000 to £2,000 per square metre, whereas a two-storey extension can start at around £1,500 per square metre.

Planning a house extension involves several stages, including idea generation, design, planning permission, and construction. Consult with a house extension architect to create a design based on your needs and budget. Ensure to check with your local council about planning permissions. Finally, choose a reputable house extension builder to bring your vision to life.
Why Hire Architects & Architectural Designers on Houzz?
1,499Local Pros on Houzz Who Serve London
95,000+Total Number of Reviews Left by Homeowners
Are you considering a house extension? On Houzz, you can find an extensive selection of London house extension professionals near you, eager to turn your vision into a reality. Whether you're planning an extra bedroom, expanding your kitchen or designing a brand-new workspace, these professionals have the skills and expertise to make your project successful. House extension professionals include architects who can draw up detailed plans and builders who will execute them to the finest standards.

Choosing a house extension professional on Houzz ensures peace of mind, knowing that you’re in safe hands. They come with a strong track record of creating bespoke, high-quality extensions in London in a wide range of styles and budgets. Whether planning a new kitchen extension, adding a new storey, or just wanting more living space, find your house extension solution with us.