Builders in Harrow for Extensions & Renovations
House extensions, loft and garage conversions, kitchens and new builds in Harrow, handled by one experienced team from Hemel Hempstead.
House extensions, loft and garage conversions, kitchens and new builds in Harrow, handled by one experienced team from Hemel Hempstead.
Need a builder in Harrow? Call us on 01442 976 112
Last reviewed: by R Gabriel Carpentry & Builders
R Gabriel Carpentry & Builders are experienced builders in Harrow, covering single and double-storey extensions, loft and garage conversions, kitchens and full renovations. We're based in Hemel Hempstead, have over 30 years' experience and keep every trade in-house. Call 01442 976 112 for a free, no-obligation quote.
At a glance
Our builders in Harrow take on most kinds of home building work, from a single room to a complete new house. The projects we're asked for most are:
See our full list of building services, or browse photos of recent projects in our project gallery. For other work, see our pages on construction in Harrow and carpentry in Harrow.
The London Borough of Harrow takes in Harrow on the Hill, Pinner, Stanmore, Hatch End, Harrow Weald and Wealdstone. Homes across Harrow include 1930s Metro-land semis, Victorian and Edwardian homes and several conservation areas.
Victorian and Edwardian homes often suit side-return extensions and rear-dormer loft conversions, and their solid walls need careful detailing where old meets new. 1930s semi-detached houses are classic candidates for hip-to-gable loft conversions and wraparound rear extensions. Parts of Harrow are covered by a conservation area, where materials, windows and roof lines need extra care and some work needs consent.

Not always. Many single-storey rear extensions, loft conversions and garage conversions in Harrow can go ahead under permitted development, but the limits are strict and some homes have lost those rights.
Planning applications in Harrow are decided by Harrow Council. Parts of Harrow are within a conservation area, where some permitted development rights are reduced and extra care over materials is expected.
Whatever the planning position, extensions and loft and garage conversions need Building Regulations approval, which covers structure, fire safety, insulation and ventilation. Our guide to planning permission for house extensions explains the limits, and the Planning Portal guide to extensions has interactive examples.
Every project starts with a free visit and a written quote; see how an extension project with us works, step by step.
Choosing builders in Harrow is a big decision, so here is what you get with us:
“Once the team have finished you would never know they have been there with all rubbish removed and everything left clean and tidy.”
Yes. Harrow is about 13 miles from our base in Hemel Hempstead and sits well within the area we cover, along with nearby Pinner and Stanmore.
Yes. Side-return extensions are a popular way to widen the kitchen of a Victorian or Edwardian terrace. Some fall under permitted development, but wraparound designs and homes in conservation areas usually need planning permission, and work near the shared wall usually needs a party wall notice.
Usually, yes. Hip-to-gable and rear dormer conversions are common on 1930s semis and are often permitted development within the 50 cubic metre allowance, unless the house is in a conservation area. Building Regulations approval is always needed.
Not always. Many single-storey rear extensions are allowed under permitted development, within limits such as 3 metres deep for an attached house (4 metres for a detached one) and 4 metres high. Parts of Harrow are within a conservation area, where some permitted development rights are reduced and extra care over materials is expected. Applications in Harrow are decided by Harrow Council. A Lawful Development Certificate gives written confirmation if you're unsure.
Every extension is priced individually, so we give a free, itemised written quote after visiting your home. The main things that move the price are size, the number of storeys, foundations and ground conditions, structural steelwork, glazing, and the kitchen or bathroom fittings you choose.
Councils aim to decide householder planning applications within 8 weeks, and Building Regulations approval can run alongside. Build time depends on size and specification, so we set out a written programme with your quote.
Yes. Our team covers carpentry, bricklaying, roofing, plastering, painting and decorating, and kitchen fitting, and we manage the project from design to completion, so you deal with one firm rather than several contractors.
We work across the area, including builders in Pinner, builders in Stanmore, builders in Hatch End, builders in Harrow Weald and builders in Little Stanmore. See every place on our areas we cover page.
Planning work in Harrow? Call 01442 976 112 or 07799 800 880, message us on WhatsApp or send us your project details for a free, no-obligation quote.
Let's talk about your project in Harrow
Get in touch today to arrange a free consultation and see how we can bring your project to life, from concept to completion.