LOFT CONVERSIONS • EXTENSIONS • NEW BUILDS
BuildingYourVision,DeliveringYourHome
Premium residential construction across London. Fixed-price contracts, transparent timelines, exceptional craftsmanship.
Webelieveeveryhomeownerdeservestransparency,quality,andabuildertheycantrust.
— Builderr, since 2022
What We Build
One team for the whole project.
LoftConversions
Transform unused roof space into a stunning new floor. Architect-led design, planning and full build under one roof.
HouseExtensions
Rear, side return and wraparound extensions built as a single fixed-scope package. No surprises, no subcontractors.
KitchenExtensions
Open-plan kitchen extensions with full-height glazing, lanterns and bifolds. Designed around light and flow.
GarageConversions
Convert your garage into a bedroom, office or self-contained annex. Fully insulated, fully compliant.
Build Types
The exact build for your home.
Dormer Loft Conversion
The London standard. Rear dormers add a full-height bedroom + ensuite under permitted development on most terraces.
Mansard Loft Conversion
The premium loft. Vertical rear wall + 70-degree slate roof. Maximum floor area on Georgian and Victorian terraces.
Hip-to-Gable Loft Conversion
The semi-detached upgrade. Replace the hipped side roof with a vertical gable wall to unlock a full dormer behind.
L-Shape Loft Conversion
The Victorian terrace specialist. Build a dormer over both the main roof and the rear closet wing for two bedrooms + bathroom.
Velux Loft Conversion
The cheapest, fastest loft. Insulate the existing roof, install rooflights, and add a fire-rated stair — no roof alteration.
Side Return Extension
The classic kitchen-diner extension. Fill the side alley of a Victorian terrace for a 3–4m wider open-plan kitchen.
Free · No obligation
60 seconds. One honest quote.
Tell us about your project in six short steps. A senior consultant will call you within one business hour with a free desk-based feasibility on your address.
Senior consultant calls within one business hour, not a junior call-handler.
We run your address through borough planning policy before the call.
No provisional sums. No day-rate. Variations only by signed instruction.
We don't chase. Quotes are valid 60 days. Decide when you're ready.
What are you building?
Pick the closest match — we'll refine on call.
What Our Clients Say
Builderr transformed our cramped attic into a beautiful master bedroom suite. The team was professional, punctual, and kept us informed at every stage. The fixed-price contract meant zero surprises.
Sarah Mitchell
Loft Conversion — Wimbledon
We were nervous about extending our Victorian terrace, but Builderr made the process seamless. They handled planning permission, the build was on time, and the quality is outstanding. Highly recommended.
James & Emily Carter
Side Return Extension — Fulham
Our kitchen renovation exceeded all expectations. The attention to detail, the quality of materials, and the craftsmanship are second to none. Builderr truly understands premium residential work.
David Thompson
Kitchen Renovation — Kensington
Recent Builds
Completed Projects
See how we've transformed homes across London.
Where We Build
All 33 London boroughs.
FAQ
Common questions.
How much does a loft conversion cost in London?+
Most London loft conversions cost £45,000–£120,000. Velux is cheapest, mansards highest.
Do you handle planning permission?+
Yes. We manage planning, permitted development checks, building regs and party wall agreements end-to-end.
Which London boroughs do you cover?+
All 33 London boroughs across loft conversions, extensions and full renovations.
Are you insured?+
Yes — £10M public liability, employer's liability, 10-year structural warranty on completion.
Ready to Start Your Project?
Get a free, no-obligation quote. We'll visit your property, discuss your vision, and provide a detailed breakdown within 48 hours.
