Single and double storey extensions in Brent. Trusted, professional, 30+ years' hands-on experience.
GS Renovation designs and builds extensions across Brent, working with the borough's mansion blocks, interwar semis and Victorian terraces in NW2, NW9, NW10 and HA0. With 30+ years of local experience, we take a rear, side-return or wrap-around extension from foundations and steelwork through to a fully fitted finish.

The interwar semis and Victorian terraces around Wembley, Willesden and Harlesden lend themselves well to extending. A side-return infill captures the wasted alley beside the kitchen, while a single or double storey rear extension pushes into the garden to create an open-plan kitchen-diner. We dig and pour the foundations, install the steel beams that carry the opening, build up the walls and tie the new roof into the existing one.
Ground conditions vary across Brent, and nearby trees or made-up ground can mean deeper or wider foundations, which our engineer specifies. Where your semi shares a boundary or party wall with the neighbour, the Party Wall Act usually applies and you serve notice early. We then handle the full fit-out, so the new space is ready to use rather than a shell.
Whether your Brent extension is permitted development or needs a full planning application to Brent Council depends on the property. Many houses in NW10 and HA9 can extend under permitted development rights within the size and height limits, but flats have no such rights, and homes on designated land or in a conservation area usually need a formal application. We assess your specific address before you commit.
If a planning application is the right route, we prepare the drawings and manage the submission to Brent Council on your behalf, then move to building regulations for the structure, insulation, drainage and fire safety. Every extension needs building control inspection regardless of the planning position, and we book and attend those inspections so the work is certified and signed off properly at completion.
Homeowners across Brent trust GS Renovation to run the whole extension, from the first foundation to the final coat of paint, as one accountable project. We know when a Wembley semi qualifies for permitted development and when a flat or conservation-area home needs Brent Council's approval, and we manage the party wall, the steel and the building control throughout. Thirty years of proof.
George always kept to commitments and arrived on time. He offered helpful suggestions during his initial visit and promptly provided a reasonably…
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…
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!!!!…
FAQ
Because scope, not skill, is what differs. A house extensions quotation that omits the engineer, the Brent Council fee or the making good will always undercut one that includes them, which is why Brent homeowners see such a spread. We list each element for the NW2 address so nothing hides. GS Renovation would rather explain a difference than quietly match a lower Brent figure. Ask every Brent builder quoting for your NW2 home to supply the same breakdown. As a rough guide, house extensions in London typically starts from roughly £40,000 for a single-storey rear extension and rises with size and specification (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.
Usually a little, and the extra time is in the finishing rather than the structure. Portered mansion blocks and period conversions above the older shopping parades rarely offer square openings or regular floors, so house extensions at an NW2 address takes more care in plaster and joinery. GS Renovation allows for that in the Brent programme rather than announcing it later. The structural stage itself is broadly comparable across Brent. Ring 07472 424 226 and we will explain what a purpose-built period NW2 property usually adds.
Not a call centre, and not a different voice each week. GS Renovation assigns one manager to your house extensions project, who surveys the NW2 property, writes the programme and stays accountable until the Brent Council certificate is issued. That is the single biggest reason Brent clients say the process felt calm. Ring 07472 424 226 and you will speak to them about your Brent job directly. That manager is your only point of contact in Brent.
Permitted development allows building up to the boundary at single storey, subject to height limits at the eaves, but foundations near a neighbour's structure engage the Party Wall Act. On a Brent plot we check both the planning route and the party wall position before design.
It is, and pretending otherwise is how fixed prices become variable ones. Portered mansion blocks and period conversions above the older shopping parades rarely offer regular dimensions, so house extensions take longer in the finishing at an NW2 address and needs more investigation beforehand. GS Renovation allows for that in the quotation for your Brent home. Brent Council will expect the method to suit the original construction. GS Renovation will describe how house extensions are normally sequenced in an NW2 property before any work starts.
Often yes. Many houses in Wembley and the wider HA9 and NW9 area can extend under permitted development, provided the size, height and boundary limits are met and the property is not flats or in a conservation area. We check your exact address against the rules first, and if a full planning application to Brent Council is needed, we prepare and manage it for you.
Regularly, though we do not pretend to cover everywhere. The house extensions patch runs across Brent and into neighbouring parts of North West London, which is wide enough to include most enquiries we receive from around NW2. GS Renovation would rather decline a job than take one it cannot service properly. Ring 07472 424 226 and ask about your Brent address. The answer comes the same day. The NW2 survey costs nothing and carries no obligation.
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 house extensions across Brent and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for house extensions in Brent. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.