We are a London building contractor, working with architects and their clients on residential refurbishment and extensions. Our job is to read the drawing, hold the programme, and credit everyone in the room on the way out.
Most builders speak to clients first and tolerate architects. We speak to architects first and earn the client through them.
What we build
Extensions
Single-storey rear, side-return, wraparound and double-storey — built to hold the architect’s detail through to completion.
Conversions
Loft, basement and garage conversions, and whole houses reconfigured into compliant self-contained flats.
Refurbishment & whole-home renovation
Full refurbishments from structure to finish, including premium apartments in period and managed buildings.
Structural alterations
Steelwork, mezzanines, load redistribution and removals — the structural work most domestic builders avoid.
New build & commercial fit-out
Ground-up residential alongside architects and developers, and services-led commercial projects.
A wraparound ground-floor extension to a Victorian terrace, built in 99% reclaimed brick on bespoke cellular steel. Longlisted for Don’t Move, Improve! 2022.
A retired couple returning from twenty years in Dubai wanted London-quality finish. We delivered the duplex including a mid-project intervention to fix an unsafe loft conversion.
Mavens’ team took on some very serious structural repairs under very difficult circumstances… The team pressed ahead with the work throughout the Christmas break, helpfully answered our many questions, and chased the Building Management Company and the structural engineers to clarify points of detail and move the work forward. I recommend them and would employ them again myself without hesitation.
Phill — structural repair programme, London
★★★★★
We own two flats in Battersea but do not live in London, so we needed a team we could trust to get on with it without much supervision. Mavens have always provided us with a five-star service — ultra-reliable and thorough, with good advice and feedback, even sending us photographs of everything they had done when we couldn’t be there to sign off. We will continue to use Mavens into the future. Highly recommend.
Alice — renovation of two flats, Battersea
★★★★★
Mavens are absolutely brilliant builders. We’ve used them for several large jobs and the workmanship is always high quality and pragmatic. Highly recommended!
Simon — multiple projects, London
★★★★★
My wife and I were expecting our first baby and wanted everything ready in time — a full house renovation with structural work, turning our house into our forever home. Mavens took the time to understand the project from the outset, and the communication was clear throughout, so there were no surprises as we went along. With their knowledge and connections they found exactly what we wanted for the bathroom and kitchen fittings — in some cases better quality for the same price.
Alex — full house renovation, London
★★★★★
Great quality, reliable and professional. Second time I have used Mavens and the service is even better. The quotation is transparent and easy to understand, and the workmanship is without fault. Throughout, I could speak to the boss to discuss issues and come up with innovative solutions.
Sachin — repeat client, London
★★★★★
Mavens were brilliant from the moment they came to give me an estimate through to completion of the job. They advised me on the latest techniques and enlightened me on the build quality of my property when needed. Their methods were fantastic, with excellent technique used to rebuild some of my walls. I’m extremely pleased with the end results and couldn’t be happier with the service I have received. I would recommend them to my friends and family in an instant.
Fifi — structural wall rebuilds, London
Start a conversation
If you're an architect with a project that needs a serious counterpart on site, we'd like to hear about it. We respond to every enquiry within two working days.
