Building services
Extensions, garage conversions and porches, matched to the house and signed off under building regulations.
A full garage conversion typically costs £14,000–£19,000, a single storey extension £2,400–£3,200 per m², and an enclosed porch £8,500–£14,000. We handle the planning route and building regulations, and the building control fee is paid to the council.
- Garage conversion
- £14,000–£19,000
- Extension
- £2,400–£3,200 per m²
- Porch
- £8,500–£14,000
- Guarantee
- 5 years, in writing
Our 2026 guide prices, all in. Your fixed price comes in writing after the site visit. Council fees checked October 2026.
Building work
Garage conversions
A full single garage conversion typically costs £14,000–£19,000, and a part conversion to a utility room or store starts from about £9,500, with the building control fee paid to the council..
House extensions
A single storey extension typically costs £2,400–£3,200 per m² finished ready for decoration, roughly £29,000–£38,500 for a 12m² rear extension, with any kitchen fit-out priced separately..
Porch extensions
An enclosed brick or stone porch typically costs £8,500–£14,000, and an oak-framed open porch starts from about £4,500.
Accessible paths & ramps
Access ramps and level paths, including Disabled Facilities Grant work.
Building control and planning advice by council
Householder planning permission costs £548 from April 2026, or £274 for a lawful development certificate if your extension is permitted development (Planning Portal: extensions). Building control and pre-application advice vary by council.
| Building control | Towns | Fee | Pre-application advice |
|---|---|---|---|
| Leicestershire Building Control Partnership | Oakham, Uppingham, Ketton, Empingham, Cottesmore, Greetham, Langham, Whissendine, Ryhall, Edith Weston | £793.09 for a 10–50m² extension | £210 |
| East Midlands Building Consultancy | Stamford | set by East Midlands Building Consultancy's fee schedule | £90 |
| Leicestershire Building Control Partnership | Market Harborough, Great Bowden | £793.09 for a 10–50m² extension | £101 |
| North Northamptonshire Council building control | Corby, Kettering, Weldon | quoted by the council for each job | £187 |
Checked October 2026. LBCP fees from 1 April 2026. Planning fees are the national fees from 1 April 2026.
Rated 5.0 from 37 Google reviews
“Excellent Porch Extension by Lewis and the Team We recently had a porch extension completed by Lewis and his team, and we are extremely pleased with the result. From start to finish, Lewis was professional, reliable, and easy to communicate with. …”
Deepak · Porch extension — Google review
“These guys fitted our job in at short notice, did a great job despite the harsh weather. We had great communication throughout the project as it was not quite as simple as we first thought. We definitely recommend them and will be using them for future projects”
John — Google review
Request a site visit
We measure up, check levels and drainage, and send a written proposal with the build-up, the programme and one whole price. No pressure and no follow-up sales calls.