Fixed-Price Domestic Construction
Crafting High-Spec
Extensions & RenovationsAcross London.
From architectural design to turn-key delivery. Master builders specialising in single/double storey extensions, luxury loft conversions, and full home transformations.
Our Expertise
Comprehensive Residential Construction
We handle every stage of your domestic build—from architectural planning and party wall agreements to high-end interior finishing.
House Extensions
Rear, side-return, and wrap-around extensions to open up spacious open-plan kitchen-diners.
Loft Conversions
Dormer, Hip-to-Gable, and Mansard conversions designed to unlock master bedroom suites and home offices.
Complete Refurbishments
Back-to-brick internal remodeling, structural steel installation, rewiring, and bespoke cabinetry.
New Builds & Ground-Up
Custom ground-up domestic developments managed from foundation laying to final handover.
Architectural & Planning
Full architectural drawings, structural engineering calculations, and Permitted Development council submissions.
Kitchens & Luxury Bathrooms
High-end bespoke kitchen installations, underfloor heating, tiling, and luxury en-suite bathroom renovations.
Our Approach
How We Deliver Your Build
We eliminate contractor stress with a clear, stage-gated process and zero hidden extras.
01
Site Consultation
We visit your property, review design plans or ideas, check structural boundaries, and determine budget parameters.
02
Fixed Quotation
You receive a completely transparent, line-by-line itemised quote and a scheduled stage-payment contract.
03
Planning & Prep
We finalise structural engineering calculations, submit council notices, and prepare health & safety protocols.
04
The Build
Dedicated on-site project management, tidy site standards, and clear weekly progress milestone reviews.
05
Handover & Sign-Off
Building Control certificates issued, final snagging complete, and 10-year structural warranty activated.
Recent Work
Featured Residential Projects
Discuss your project scope →
Victorian Villa Open-Plan Extension
Structural steel insertion, polished concrete flooring, bespoke kitchen island, and 5-panel aluminium bi-fold doors.
Master Bedroom Suite & En-Suite
Creation of an expansive master bedroom with custom walk-in wardrobe, Velux solar rooflights, and wet-room bathroom.
From our initial site survey through to final council sign-off, GN Developers were exceptional. We were naturally apprehensive about undertaking a large rear wraparound extension while continuing to live on-site, but their team was punctual, polite, and kept the working areas impeccably tidy every single evening.
The structural steelwork and installation of our five-metre bi-fold doors were executed without a hitch, and having a dedicated site manager meant we received transparent weekly progress updates with zero surprise costs. The quality of finish in our new open-plan kitchen and living space has genuinely transformed how our family lives. I would not hesitate to recommend them to anyone planning a domestic build.
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Get In Touch
Request a Free Site Survey & Detailed Quote
Fill in the details of your project and our lead surveyor will contact you within 24 hours to arrange an on-site consultation.
