House Extensions | South West London
Expert house extensions across SW London. Side return, rear and wraparound builds. Fixed-price quotes after a site visit, one team throughout, and no deposit required.
No deposits. Only pay for completed work.
You only pay for work that's completed, valued week by week.
All work is guaranteed for complete peace of mind.
Our trusted team is managed directly by us.
Your project manager keeps you updated every step of the way.
We'll always give you straight advice and advise if savings can be made.
Extensions can add 15-25% to your property value with the right design
Efficient project management ensures timely completion
Thoughtful designs that maximize light and space
Certified Federation of Master Builders member
Perfect for Victorian and Edwardian terraces. Reclaim wasted side passage space and create an open-plan kitchen-diner.
The classic extension. Extends into your garden to create a spacious kitchen-dining area with bi-fold or sliding doors.
Combines side return and rear extension for maximum space. Creates impressive open-plan living areas.
We assess your garden, existing structure, drainage runs and any party wall implications. We advise on single storey, double storey or wraparound options and explain the practical next steps before any fees are paid.
Don't just take our word for it — hear from homeowners across SW London
"Ben, Tom and Milen are just brilliant. Not only were these guys and their team knowledgeable, hard working and great at communicating but they also pointed out issues that we had not thought of. Every aspect of the work has been carried out to a very high standard."
Clemmie and Jack
Chiswick · Google review
"Ben is a fantastic project manager, he doesn't pass any stress onto his clients. Tom is amazing — everything is possible according to Tom. The end result is phenomenal."
Sophie Weston
Clapham · Google review
"Absolutely brilliant firm. Hired them for a loft conversion. Really professional, great build quality, high quality finish. Great communication throughout. We are thrilled with the result and would hire them again in a heartbeat"
Peter Hughes
Google review
"Tom, Milen & Ben at Bluebird Spaces, 100% delivered on constructing our ground floor extension. The project came out on time, on budget and with customer happiness as their ultimate goal."
Dan & Maddy
Sheen
"Ben and Tom are just finishing a complete refurbishment of my two bedroom flat in Chelsea. They are a joy to work with. Responsive, helpful and always wanting me to get the best possible result. I recommend them wholeheartedly."
Barry Lynch
Chelsea · Google review
"We worked with Bluebird on our kitchen extension project. Highly recommend. They were transparent, easy to work with, had top tradesmen who care about delivering a good build."
Alex Ng
Wandsworth · Google review
"They were knowledgeable and explained each part of the process in terms that I could understand. All the workers are friendly, clean up after themselves every day. I would wholeheartedly recommend them."
Jane Farrelly-Ward
Richmond · Google review
"Using Bluebird for such a big project was the best decision we have made. They are our first call when we find another development."
Tony and Rhys
Fulham
"Tom was brilliant throughout the whole build process. It was a pleasure to be asked for a website review, after all they did for us. We are truly grateful to the whole team for the level of quality and for continually going the extra mile."
Rowan A
Wandsworth
"Bluebird was recommended to me by our local estate agent. Lovely guys and so pleased decided to go with them. Tom, Milen and the team on site were so professional and couldn't have been more helpful. Very happy clients."
Emma and Tom
Richmond
"We simply couldn't recommend Ben, Tom and Milen enough. The team was amazing for the duration of our ground floor project, which involved gutting and reconfiguring the lounge, kitchen and utility room."
Andrew Cork
Google review
"We used Ben and his team to completely refurbish our house as well as create a new en suite bathroom. Being an older house we had several unexpected issues but Bluebird Spaces managed to still get everything finished on time…"
Verena Peternell
Google review
We've delivered house extensions throughout southwest London, from side-return extensions on Wandsworth terraces to wraparound builds in Wimbledon. Every borough has its own planning requirements — conservation areas, permitted development limits and party wall agreements — so we've put together a dedicated page for each area we cover, with local planning guidance specific to that location. Our party wall notice timeline for extensions and lofts explains when to serve notices.
Side return and rear extensions for Wandsworth's terraced homes
Rear and wraparound extensions suited to Battersea's period housing
Side return and rear extensions across Clapham
Extending Putney's semi-detached and terraced properties
Sympathetic extensions for Chelsea's listed and period buildings
Navigating Richmond upon Thames planning for conservation areas
Rear and side return extensions for Fulham's terraced streets
Rear, side return and wraparound extensions in conservation-area Wimbledon
Free consultation. Clear, itemised quote. No deposit upfront.