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House Extension Professionals

Expand your living space with a well-designed extension, custom built to meet your needs and preferences

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House Extensions
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Featured Reviews for House Extension Professionals

Home Republic Ltd
House Extension Professionals
Average rating: 5 out of 5 stars12 June 2026
“I worked with Home Republic last year on a large extension and renovation project as the interior designer. The team were a pleasure to work with, very responsive to any queries or issues and their work was finished to a very high standard. I would definitely recommend their services.”
The Market Design & Build
House Extension Professionals
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.”
MODEL Projects Ltd
House Extension Professionals
Average rating: 5 out of 5 stars6 December 2025
“We recently completed a side return extension on our Victorian terrace and had a fantastic experience working with Model Projects. They handled both the design and the project management, and we genuinely felt supported throughout the entire process. A special thank you to Sophie, who was our main point of contact. She guided us clearly through each stage, helped shape the design, and was always responsive and reassuring during the build. Her project management was exceptional and she repeatedly went above and beyond to keep things running smoothly. We are absolutely delighted with the final result. The space is beautifully designed, highly functional for our family, and has completely transformed how we use our home. We would readily recommend Model Projects to anyone considering an extension or renovation.”
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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.

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 United Kingdom
95,000+Total Number of Reviews Left by Homeowners
Are you considering a house extension? On Houzz, you can find an extensive selection of 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 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.