Dormer, hip to gable and mansard loft conversions in Brent. Trusted, professional, 30+ years' hands-on experience.
GS Renovation works across the London Borough of Brent, from the terraces of NW10 and NW2 to the interwar semis around Wembley in HA0 and HA9. Brent also holds a great many red-brick mansion blocks and period flats, where a loft conversion is usually not possible at all, so the first job is telling you honestly which you own.

If you live in one of the red-brick mansion blocks around Kilburn or Willesden Green, the roof void above your flat almost certainly is not yours. It is retained by the freeholder, it often carries shared tanks, plant or communal services, and the building has a single fire strategy covering every dwelling in it. Cutting a new floor and a stair into that arrangement needs freeholder consent, a licence to alter, and agreement from every other leaseholder affected. In practice the answer is usually no, and we would rather say so at the first visit.
Top floor flats in period houses split into conversions run into the same wall. Even where a lease grants the loft, the stair has to come out of your own floor area, the new structure has to bear on walls shared with the flat below, and Part B will demand a protected route that the communal staircase may not provide. Where it genuinely cannot be done we will say so and point you at what is possible instead, whether that is a rear extension, a reconfiguration or a full refurbishment.
Brent's freehold houses are a different proposition. On the Victorian and Edwardian terraces in NW10 and NW6, an L-shaped dormer over the rear closet wing is the usual choice, while the interwar semis near Wembley Stadium suit hip to gable with a rear dormer behind. Either way the first measurement is ridge height, around 2.2m to 2.4m above the existing ceiling joists, because below that you are into lowering ceilings or raising the roof and the economics change sharply.
Terraced houses are commonly cited as having a 40 cubic metre permitted development volume allowance and semis 50, subject to conditions on materials, side window glazing and not building forward of the roof plane. Conservation areas and Article 4 directions remove those rights, so we confirm the position with Brent Council rather than assume. Building regulations apply regardless, covering fire safety, the stair, the engineer-designed floor structure on steel beams, insulation and ventilation.
Brent homeowners choose GS Renovation because we give a straight answer first. If you own a mansion flat, we will tell you a loft conversion is not realistic rather than sell you a survey. If you own a house, you get the engineer coordinated, steel installed to their design, party wall notices prepared and Brent Council building control managed through to sign-off. Fully insured, free no-obligation quotations.
George always kept to commitments and arrived on time. He offered helpful suggestions during his initial visit and promptly provided a reasonably priced quote. The work started on time and George worked really hard every day. There were…
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…
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.
FAQ
We quote loft conversion once we have seen the house. Older stock around NW2 hides things, so the Brent survey is free and the figure GS Renovation gives you afterwards is one it will stand behind across Harrow and Brent alike. 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 book loft conversion a few weeks ahead in normal conditions. Getting the NW2 survey done early means the Brent project is scheduled properly rather than squeezed into a gap.
GS Renovation carries full insurance on every loft conversion job and can show the certificate. We are GS Renovation Ltd, company number 14611254, so you can check us before work starts at NW2 in Brent.
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 Brent is what building control examines hardest. Insulation must satisfy Part L. GS Renovation manages the Brent Council application and inspections for your NW2 conversion.
Yes. loft conversion in an older property around NW2 needs a different approach to a modern build, and we allow for that in both the programme and the Brent quotation.
Almost never. The roof void in a mansion block is normally retained by the freeholder, may carry shared tanks or services, and sits inside a fire strategy covering the whole building. You would need freeholder consent and a licence to alter, and the structural and escape route implications reach beyond your own flat. Freehold houses in NW10, NW2, HA0 and HA9 are where loft conversions in Brent genuinely work.
Brent sits inside our normal working area, and we are usually on another Brent site nearby. That often means a NW2 survey for loft conversion can happen quickly.
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 Brent. Explore what else we do locally:
Same Service, Nearby Areas
We carry out loft conversion across Brent and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for loft conversion in Brent. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.