Dormer, hip to gable and mansard loft conversions in Battersea. Trusted, professional, 30+ years' hands-on experience.
GS Renovation converts lofts across Battersea, on the Victorian and Edwardian terraces running back from Battersea Park towards Clapham Common. Most keep a rear closet wing, which points straight at an L-shaped dormer. We build to the structural engineer's design, handle the steelwork ourselves and book Wandsworth Council building control at every stage.

Head height decides everything after it. Measure from the existing ceiling joists to the ridge and hope for 2.2m to 2.4m, because below that your options narrow to dropping the ceilings in the rooms beneath or raising the roof line, and the second brings planning into the picture. Battersea terraces vary street by street, and the closet wing at the back is the detail worth checking, since an L-shaped dormer that turns the corner into the wing produces a proper double bedroom with an en suite.
Where a house sits inside one of Wandsworth's conservation areas near the park, a bulky rear dormer is the form most likely to be refused, and a mansard is often what an officer will discuss instead, rebuilding the rear slope at a steep pitch for the most volume of any type. It is also the dearest, at roughly £70,000 to £100,000 or more as an indicative London range for 2026 against roughly £55,000 to £80,000 for the L-shaped dormer. Riverside flats are a separate question, covered below.
A good share of SW11 is apartments rather than houses. If you hold a leasehold flat or a maisonette with roof space above it, any conversion depends on whether the freeholder owns that space and will sell or licence it, and in many buildings the answer is simply no. We would rather say that at the survey than take a deposit. Where you own the freehold of a whole terraced house, the picture is far more straightforward and the usual route applies.
For houses, steel beams span between the party walls to carry the new floor and the dormer, sized by the engineer and set on padstones, and the old cold water tank normally comes out in favour of a combi or an unvented cylinder. Cutting into a shared wall makes the work notifiable under the Party Wall etc. Act 1996, and that notice is served by you as building owner rather than by us. Wandsworth building control inspects the fire strategy, the stair and the structure as the job proceeds.
Battersea owners come to GS Renovation because the structural half of a loft is our daily work: steel beams, altered roofs, party wall coordination and Wandsworth Council building control. Founder Abdelaaziz Saaid has 30+ years of hands-on experience. You get a dedicated project manager, a fully insured contractor rated 4.9 from 31 MyBuilder reviews, and free no-obligation quotations.
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…
George is a very hard working builder, and has done a fantastic job on replacing my Bathroom. His attention to detail was great and I wouldn't hesitate to recommend him to my friends and family. I will always keep his details handy and…
What can I say!!! George is an extremely lovely man his workmanship is second to none, he has an excellent eye for detail and nothing was to much trouble. George it was a pleasure having you in our home! thank you for all your hard work…
FAQ
Be wary of any firm quoting loft conversion without visiting. Condition is not visible from the road at SW11, so we survey the Battersea property and price what we actually find there. 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.
Lead time varies with the season and how booked we are. Ring us and we will say honestly when loft conversion could begin at your SW11 address rather than promise a Battersea date we cannot hold.
Ask for references on loft conversion and we will give you addresses, not testimonials. Seeing finished work near SW11 or across Battersea in person tells you more than anything written down.
In most cases the question is not permission but which route applies. A rear dormer on a Battersea house often proceeds under permitted development, while anything altering the front roof plane usually needs a full application to Wandsworth Council. Conservation area status or an Article 4 direction removes those rights entirely, so we confirm the position for your SW11 property first.
Yes. A large share of homes around SW11 are of that type and we work on them constantly. Each loft conversion project is planned around how they were built, in Battersea and across Putney.
Usually not without the freeholder agreeing, and often not at all. The roof void above a leasehold flat generally belongs to the freeholder, so you would need to buy or licence it and vary the lease before any building work is discussed. A few Battersea buildings will consider it, most will not. Freehold houses in SW11 are much simpler, and we survey those free of charge.
All of Battersea is covered for loft conversion, houses and flats alike. Email info@gsrenovationltd.co.uk with the address and we will confirm before you spend time on drawings for the SW11 property.
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Same Service, Nearby Areas
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Free, no-obligation quote for loft conversion in Battersea. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.