Builders in Hertfordshire for Extensions & Renovations
House extensions, loft and garage conversions, kitchens and new builds in Hertfordshire, handled by one experienced team from Hemel Hempstead.
House extensions, loft and garage conversions, kitchens and new builds in Hertfordshire, handled by one experienced team from Hemel Hempstead.
Need a builder in Hertfordshire? Call us on 01442 976 112
Last reviewed: by R Gabriel Carpentry & Builders
R Gabriel Carpentry & Builders are builders in Hertfordshire, working from our base in Hemel Hempstead. We build house extensions, loft and garage conversions, new homes and kitchens, and manage every trade ourselves, from groundwork to the final coat of paint. Call 01442 976 112 for a free, no-obligation written quote.
At a glance
Our builders in Hertfordshire 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 Hertfordshire and carpentry in Hertfordshire.
Hertfordshire is our home county. We work most often in west and central Hertfordshire, from Tring and Berkhamsted through Hemel Hempstead, St Albans and Watford to Hatfield and Welwyn Garden City. Homes across Hertfordshire include new town housing in Hemel Hempstead, Stevenage and Hatfield, Victorian terraces in the market towns, 1930s Metro-land homes in the south-west and period cottages in the villages.
Post-war houses here often have good-sized gardens and straightforward layouts, which suit single-storey rear extensions and open-plan kitchen-diners. 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.

Not always. Many single-storey rear extensions, loft conversions and garage conversions in Hertfordshire can go ahead under permitted development, but the limits are strict and some homes have lost those rights.
Planning applications in Hertfordshire are decided by the district or borough council for your address, such as Dacorum, St Albans, Three Rivers, Watford, Hertsmere or Welwyn Hatfield. Parts of Hertfordshire are within a conservation area, where some permitted development rights are reduced and extra care over materials is expected. Much of the countryside around Hertfordshire is Metropolitan Green Belt. Permitted development still applies to most houses, but applications for larger extensions are judged on whether they are disproportionate to the original building.
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 Hertfordshire is a big decision, so here is what you get with us:
“Always on time, very friendly, very tidy and exceptional workmanship. Made the whole process a lot less stressful.”
Yes. We're based in Hemel Hempstead and work across Hertfordshire, most often in the west and centre of the county. For building work in the far north or east of the county, call us on 01442 976 112 to check.
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 Hertfordshire are within a conservation area, where some permitted development rights are reduced and extra care over materials is expected. Applications in Hertfordshire are decided by the district or borough council for your address, such as Dacorum, St Albans, Three Rivers, Watford, Hertsmere or Welwyn Hatfield. 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 Hemel Hempstead, builders in St Albans, builders in Watford, builders in Harpenden, builders in Berkhamsted, builders in Hatfield, builders in Welwyn Garden City, builders in Stevenage and builders in Hitchin. See every place on our areas we cover page.
Planning work in Hertfordshire? 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 Hertfordshire
Get in touch today to arrange a free consultation and see how we can bring your project to life, from concept to completion.