Dormer, hip to gable and mansard loft conversions in Paddington. Trusted, professional, 30+ years' hands-on experience.
GS Renovation works on roof projects in Paddington, where W2 is Victorian stucco terraces and townhouses, a large proportion of which have been divided into flats. Whether a loft is available depends first on whether you own the whole building, and second on Westminster City Council's view of the roofline.

The W2 stucco terrace was built as single family houses, but many have been split into flats over the last century. If you hold a leasehold flat in one of those, the roof usually belongs to the freeholder and a conversion is not open to you without their consent and a licence to alter, and permitted development does not apply to flats at all. If you own the freehold of the whole house, a roof extension is a live possibility.
Where it is live, the form is almost always a mansard. Paddington's terraces have shallow roofs behind parapets and a box dormer would be conspicuous and unwelcome; a mansard rebuilt at a steep pitch behind a retained parapet reads far better and gains a proper storey. Existing head height still has to be checked, because many of these roofs already contain former servants' rooms and the 2.2m to 2.4m you need may not be there.
Conservation area coverage across Paddington is extensive and a number of buildings are listed, so permitted development does not apply and a full planning application to Westminster City Council is required. Listed buildings need listed building consent in addition, assessed separately. The council looks closely at roof form, materials, dormer proportions and how the extension reads in the terrace as a whole, so the application belongs with a heritage architect from the outset.
On site, the work is substantial. Steel beams span between party walls to carry the new floor and the mansard framing, sized by the structural engineer and bearing on padstones formed in soft lime-bedded brickwork. Part B fire safety on a tall terraced house normally requires a protected stairwell running all the way to a final exit, with fire doors and interlinked alarms. Party wall notices go to the adjoining owners on both sides before work begins.
In Paddington the first question is whether the roof is yours at all, and GS Renovation answers that before anything else. Where it is, we coordinate the heritage architect and structural engineer, build the mansard to the approved drawings and take Westminster building control through to sign-off. We are fully insured and work to building control approval at every stage. Companies House no. 14611254.
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.
Very friendly and I am very pleased with the work he has done, also very clean worker and enthusiastic about his work. Can not fault this company!!!! Very very good for the money.
Excellent service. George's knowledge and skills are the best in the market. He knows what he is doing, does really high quality work, gives good advice on how to setup worktops, bathrooms, what type of panels and materials to use and can…
FAQ
The survey is free and carries no obligation. We look at the W2 property, set out what loft conversion involves in a Paddington home of that age, and give you a written figure to consider. 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.
Building control adds time to loft conversion but not much, provided inspections are booked ahead. GS Renovation handles that with Westminster City Council so your W2 project in Paddington is not waiting on paperwork.
Where loft conversion needs structural design we appoint and coordinate the engineer, then build to their specification at W2. GS Renovation does not produce calculations itself, in Paddington or anywhere else.
Often, but the form is constrained. Permitted development rights are withdrawn, so a full application to Westminster City Council is needed, and a rear dormer that would pass unremarked elsewhere in Paddington may be refused. A mansard behind a retained parapet, finished to match, is frequently what gets approved. Listed buildings need listed building consent as well.
They make up much of Paddington, and loft conversion in them rewards patience. We protect original features at the W2 property and work to what building control requires throughout.
Only with the freeholder's agreement, and usually not. The roof of a converted townhouse is normally retained by the freeholder, so you would need their consent and a licence to alter, plus full planning permission from Westminster City Council, since permitted development does not apply to flats and most of W2 is conservation area. Check the demise on your lease before spending anything on design.
We cover the whole Paddington area for loft conversion, plus Marylebone and the streets between. Call 07472 424 226 with a postcode and you will get a straight yes or no.
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 Paddington. Explore what else we do locally:
Same Service, Nearby Areas
We carry out loft conversion across Paddington and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for loft conversion in Paddington. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.