Skip to main content

Extensions and Conversions in Hemel Hempstead

Single and double-storey extensions, loft conversions and garage conversions, designed and built by one team.

Get a free quote Call 01442 976 112
Newly built semi-detached house with timber cladding and a paved driveway Bright bedroom with a new uPVC window Open-plan room with oak flooring and sliding doors to the garden White kitchen with an island hob and chimney extractor

Need a builder in Herts? Call us on 01442 976 112

Last reviewed: by R Gabriel Carpentry & Builders

R Gabriel Carpentry & Builders builds extensions and conversions in Hemel Hempstead and across Hertfordshire: single and double-storey extensions, loft conversions and garage conversions. We manage the project from design to completion with our own team of trades. Call 01442 976 112 for a free, no-obligation quote.

At a glance

What
Single and double-storey extensions, loft conversions, garage conversions
Where
Hemel Hempstead and Hertfordshire
Approvals
Permitted development or planning permission, plus Building Regulations
Experience
Over 30 years
Who does the work
Our own carpenters, builders, roofers and decorators
Quotes
Free and written – call 01442 976 112

What types of extensions and conversions do we build?

We build single and double-storey extensions and convert lofts and garages for homeowners in Hemel Hempstead and across Hertfordshire. We're a professional carpentry and construction business, and our team is skilled in a wide range of design, construction and conversion techniques.

  • Single-storey rear extensions for kitchen-diners and family rooms
  • Side-return and wraparound extensions
  • Double-storey extensions
  • Loft conversions: rear dormer, hip-to-gable and rooflight
  • Garage conversions
  • Conservatories

Homeowners often extend because their home no longer has the space they need, and using outdoor space is an ideal way to create a new living area. We bring those ideas to reality, designing and building living spaces that suit the household.

Large open-plan room with oak floor and sliding patio doors – one of our extensions and conversions in Hemel Hempstead
Example of our work: an open-plan extension with an oak floor and sliding patio doors.

Do you need planning permission for an extension in Hemel Hempstead?

Not always. Many single-storey rear extensions are permitted development, within limits such as 3 metres deep for an attached house and 4 metres for a detached house. Applications in Hemel Hempstead go to Dacorum Borough Council, and conservation areas such as the Old Town and Boxmoor have tighter rules.

Building Regulations approval is needed for almost every extension and conversion. Our guide to planning permission for a house extension sets out the limits in detail.

Is a loft or garage conversion right for your home?

Conversions are a great way to turn under-used lofts and garages into stylish, practical living space. We believe lofts and garages have much more potential than storage, and we help homeowners across the area redesign and convert them into well-used rooms.

A loft conversion is often permitted development within a 40 or 50 cubic metre allowance; see our loft conversion guide. A garage conversion usually needs Building Regulations approval but not planning permission, unless a condition on your estate says otherwise; see our garage conversion guide.

Find out more on our loft conversions, garage conversions and conservatories pages.

Video: the Keeling House build.

How does an extension project with us work?

  1. Free visit and advice – we look at your home, talk through what you want and point out anything that affects the design or cost.
  2. Written quote – you receive a clear, itemised quote and an outline programme of works.
  3. Drawings and approvals – we work with your architect or designer and structural engineer so planning and Building Regulations approval are in place before work starts.
  4. The build – one team handles every trade, keeps the site tidy and keeps you updated as the work progresses.
  5. Finishing and handover – we finish, snag and clean up, and building control signs off the work.

Why choose us for extensions and conversions in Hemel Hempstead?

When you choose us for extensions and conversions in Hemel Hempstead, one team designs and builds your project and covers every trade:

  • Over 30 years' experience – in carpentry, building and home renovation.
  • All trades under one roof – carpenters, builders, roofers, painters and kitchen fitters in one team.
  • Design to completion – one firm manages your project from groundwork to final finish.
  • Built on recommendations – most of our work comes from repeat customers, referrals and word of mouth.
  • Clean, considerate sites – customers regularly mention tidy sites and work cleared up daily.

“Once the team have finished you would never know they have been there with all rubbish removed and everything left clean and tidy.”

Natalie, customer review

Extensions and conversions in Hemel Hempstead: frequently asked questions

Do I need planning permission for an extension in Hemel Hempstead?

Not always. Many single-storey rear extensions fall under permitted development, within limits such as 3 metres deep for an attached house and 4 metres for a detached one. Applications in Hemel Hempstead go to Dacorum Borough Council. Building Regulations approval is needed either way.

Does a loft conversion need planning permission?

Many loft conversions are permitted development, with a volume allowance of 40 cubic metres for terraced houses and 50 cubic metres for other houses. Dormers facing the road, mansards and homes in conservation areas usually need planning permission.

Can my garage be converted into a room?

Most integral and attached garages can be converted. Internal work often needs no planning permission, but some newer estates have conditions that keep garages for parking. Building Regulations always apply, covering the new wall, floor, insulation, ventilation and fire safety.

How much does an extension cost?

Every extension is priced individually. Size, storeys, foundations, steelwork, glazing and your choice of kitchen or bathroom fittings make the biggest difference, so we give a free, itemised written quote after a visit.

Can we live at home during an extension?

Usually, yes. We plan the work to keep disruption down, for example by keeping the kitchen sink and washing machine connected for as long as possible.

Do you build double-storey extensions?

Yes. We build both single and double-storey extensions, along with the structural work, roofing and finishes.

Ready to talk about your project? Call 01442 976 112 or 07799 800 880, message us on WhatsApp or send us your project details for a free, no-obligation quote.

Get in touch today

Let's build something great together

Get in touch today to arrange a free consultation and see how we can bring your project to life, from concept to completion.