Dormer, hip to gable and mansard loft conversions in Soho. Trusted, professional, 30+ years' hands-on experience.
GS Renovation works in Soho and the surrounding W1 streets, where nearly every building is in mixed use with apartments above shops, bars and offices. A conventional loft conversion is rarely possible here, and we say so plainly. What we do deliver is structural alteration and refurbishment inside these upper-floor flats.

Soho buildings are typically held freehold by an investor or an estate, with leases on the upper floors and commercial use at street level. The roof is retained by the freeholder, often carries plant serving the whole building, and forms no part of any residential lease. On top of that, Westminster City Council conservation area designation covers Soho, many buildings are listed, and altering a roof visible in this townscape is a hard case to argue on its merits.
There is also the fire strategy. A building with commercial use below and flats above has an escape route designed for the whole structure, and adding habitable space at roof level changes it. Part B would require a protected route to a final exit through parts of the building you do not control. That is not a detail to be solved on site, it is usually the reason a scheme does not proceed at all, and we would rather explain it than take on work that cannot be signed off.
A good deal, provided the freeholder consents. Removing an internal load-bearing wall onto a steel beam sized by an engineer, reworking a cramped Georgian plan, rebuilding a kitchen or bathroom, or a full refurbishment of a period upper-floor flat are all routine for us. Where the building is listed, listed building consent is needed for internal alterations too, and Westminster City Council building control still inspects the structure and any change to fire separation.
Access and logistics are the other half of the job in W1. Deliveries, waste removal, working hours and protection of shared stairs all have to be agreed with the managing agent and often with neighbouring businesses, and narrow streets mean materials arrive in small loads. We plan that into the programme rather than discovering it in the first week, and we keep the flat and the common parts clean while the work runs.
Soho owners choose GS Renovation because we are honest about the roof and capable on everything below it. Structural alterations, steel beams, full refurbishment of period upper-floor flats and Westminster City Council building control are handled in-house. Founder Abdelaaziz Saaid brings 30+ years of hands-on experience to awkward central London buildings, and the firm is fully insured.
George did a great job on our new bathroom. He is a really friendly and helpful guy and always ready to discuss any issues or concerns and come up with a sensible solution. Best of all, he works to budget and does not try and find…
Punctual, worked hard, and did exactly what he was asked and what he said he would do. Overall, a very high quality job. Will use again.
Built a new extension at rear of property. Laid foundations, drainage, raised floor, new roof and completed all fixtures and interior decoration. Also in 2015 completed patio in garden, steps around rear extension. He did a fantastic job…
FAQ
Scope drives the price of loft conversion far more than the address does. GS Renovation prices each element separately, so a change of specification partway through a Soho job shows its cost immediately at the W1 site. As a rough guide, loft conversion in London runs roughly £30,000 to £45,000 for a rooflight scheme, £45,000 to £65,000 for a rear dormer, £55,000 to £80,000 for an L-shaped dormer or a hip to gable with a dormer, and £70,000 to £100,000 or more for a mansard; an en suite adds roughly £8,000 to £15,000 (indicative London ranges, MyBuilder and Checkatrade, 2026). Your figure depends on the size, specification and condition of the property, which is why we survey before quoting.
We do not run loft conversion across several sites at once. The team on your W1 project stays on it until the Soho work is finished, which is what makes the programme predictable.
Our founder has spent over 30 years on the tools. You get a named project manager, a fully insured team, and aftercare once loft conversion at the W1 property is signed off in Soho.
All the ones that matter structurally. New floor steels are sized by an engineer, the staircase must meet Part K, and Part B requires a protected escape route with interlinked alarms, which on a third storey in Soho is what building control examines hardest. Insulation must satisfy Part L. GS Renovation manages the Westminster City Council application and inspections for your W1 conversion.
Certainly. Properties across Soho vary more than people expect, so each loft conversion project at W1 is treated on its own merits rather than by the standard detail from the last job.
Usually not. The roof of a W1 building is normally retained by the freeholder, often carries plant, and sits within a conservation area where many buildings are listed, so consent is difficult. The larger obstacle is fire escape: adding habitable space at roof level changes the escape strategy for a building with commercial use below. Internal alterations and refurbishment are a different matter and we do plenty of both.
We cover Soho and the W1 area for loft conversion with no minimum job size. Small work at a W1 property is how many of our larger Soho projects start, so it is worth asking.
Every Service, One Team
The same trusted team, 30+ years' hands-on experience and free, no-obligation quotes apply to every GS Renovation service in Soho. Explore what else we do locally:
Same Service, Nearby Areas
We carry out loft conversion across Soho and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for loft conversion in Soho. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.