House Extensions

Add value, create your perfect space with one of our qualified architects and end-to-end service.
We serve London and surrounding areas.

Our  home extension services are designed to add both substantial value and precious living space to your home. Our planning and architectural drawing teams will draw upon years of experience and real creativity to help you create the perfect layout for your extension, and our structural engineering services team will make sure your new extension is built to last!

We’ll conduct a complete room-by-room breakdown for you, ensuring that you get the extension you need within your budget. We ensure that every aspect of pricing is transparent and completely above-board, and offer a unique fixed budget guarantee.

Next, we’ll invite three carefully vetted and fully trusted contractors to deliver quotes for completing the work. You can rely on our expertise in this regard. The Summit Architecture team as a whole will help the extension you can only imagine become a concrete (or even timber 😉) reality.

House Extensions

Get in touch!

Book in for a casual, no obligation chat with one of our consultants who can talk you through each process of your project and how best Summit can help.

Get in touch!

Book in for a casual, no obligation chat with one of our consultants who can talk you through each process of your project and how best Summit can help.

Overview of Services

The Summit scope of services you will need to complete your project

Our Reviews

What you can expect when working with our dedicated team.
We have had our extension plan designed by Summit and approved by the council last month. Everyone at Summit is super professional, from Joe who surveyed our house to Carl suggested budget-friendly alternatives to Gus who called us to explain structural drawings. Above all, we are especially impressed by Nicolette who is a brilliant problem-solver. It gives me such a pleasure to be able to work/communicate with someone like her to always give warm and prompt response for any queries we have.
Xiao Xiao
Xiao Xiao
I had a mixed experience with Summit during my project, but pleased overall, once Karim stepped in towards the end.During the pitch process, I felt that some of the elements were not explained properly, what's included and what's not. For example, I proceeded based on the belief that I would get the detailed 3D renders, only to discover later on that this was available at extra cost. Also, the communication with architects wasn't super smooth in the beginning and was a bit slow, but improved as the project went on. Jamiul did a good job with architectural drawings.I would highlight my super positive experience with Karim, who did my structural drawings. He visited the site to introduce himself and see the project in person, to be able to better understand the intricacies of the structural support that we needed for various wall removals. He was super flexible when we had to change the plans slightly due to party wall agreements with neighbours and was easy to communicate with and completely changed my experience of dealing with the firm. Very happy with the final outcome and would recommend Summit Architecture.
Ivan Segrt
Ivan Segrt
The Service I received working with Summit Architecture was unmatched, they were fast and efficient and knew exactly what they were doing which left me at ease throughout it all. Highly recommend and to work with them again soon!
Sophie Richards
Sophie Richards
We met with 4 different architects before hiring Summit. The team were prompt, concise and professional, very competitive on price, and fully understood our vision for the project.Jimi and the team were approachable and was very patient with some changes that we made to our drawings midway through the design process.We were kept informed on the throughout the process and I would definitely recommend Summit to others, so much so we have engaged their interior designers to help us put the finishing touches to the project. We cant wait to see it.
Max Holland
Max Holland
We had the need of some structural calculations for a very small internal alteration on our flat, where we needed to keep the landlord informed . Where others simply gave us a standard 'cut and paste' reply to our enquiry, Oliver took the time to clarify and understand exactly what we were wanting to achieve and then provided what we required to enable us to reach our goal. He worked quickly and was unfailingly helpful and supportive.We found him a delight to work with. We would definitely use his services again.
Tony Maslin
Tony Maslin
We engaged the services of Oliver Newell at Base Architecture Ltd last year (2018) and found him to be professional, dedicated and supportive of our proposal from start to finish.He kept us informed throughout the process giving clear explanations and never once did we feel unsure of him. We would highly recommend him to others and are thoroughly happy with the excellent service we received.
Mel Mitch
Mel Mitch
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Our Packages

We understand that all projects have different budgets, choose the level of service that fits you.
Speak to our sales team about what package suits you.

Start Your Dream Project Today!

Book in for a casual, no obligation chat with one of our consultants who can talk you through each process of your project and how best Summit can help.