From £16,800
Karl Builder
Member since October 2026
Winchester, SO23
Hi we are a building company that have been working in the swindon area for many years we also work as far as bristol We do loft conversion. ...
Luke Rees
General Building Services (Southampton) Ltd is a trusted extension builder serving customers in Winchester and the surrounding area. Contact us to ...
Experienced extension builder ready to quote for your work. CSY Construction Ltd is the best extension builder in Winchester. No obligation free qu...
Experienced extension builder ready to quote for your work. Artisan Builders is the best extension builder in Winchester. No obligation free quotes...
Relax... you have found a reliable extension builder in Winchester. Property Maintenance Repair is a friendly and reliable company based in Winches...
Winchester, SO23
Lex Projects is a family run residential building company based in Winchester, renowned for our unrivalled high-end finishes and projects, using on...
From £15,928
Protouch Builders is an established extension buildering business in Winchester. We come highly recommended and provide competitive quotes for your...
From £15,776
Ace Brickwork Ltd are here to help customers who need an Extension Builder in Winchester. We offer a competitive rate to complete all your extensio...
From £16,080
Darren Hitchins T/A The Honest Builder is an established extension buildering business in Winchester. We come highly recommended and provide compet...
From £16,112
Experienced extension builder ready to quote for your work. Chris Buttler Builders is the best extension builder in Winchester. No obligation free ...

Garage conversions in Winchester typically range from £15,736 (Property Maintenance Repair based in SO50) to £16,800 (Boss based in SO23), but the only way to get an accurate cost for your specific project is to get quotes.
Post a job with HaMuch and we'll send it to extension builders in Winchester who will be happy to help.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Convert A Garage near Winchester | £39 | £283 |
| Convert A Garage near Chandler's Ford | £34 | £245 |
| Convert A Garage near Eastleigh | £34 | £244 |
| Convert A Garage near Romsey | £32 | £230 |
| Convert A Garage near Hedge End | £34 | £244 |
| Convert A Garage near Test Valley | £37 | £261 |
| Convert A Garage near Southampton | £34 | £243 |
| Convert A Garage near Andover | £40 | £248 |
| Convert A Garage near Totton | £34 | £243 |
| Convert A Garage near Locks Heath | £33 | £240 |
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building - £17,547

Two storey extension - £88,071

Build a timber frame extension - £26,047

Build a swimming pool - £81,047

Single storey extension - £55,944

Side return extension - £42,031

Install an RSJ - £2,247

Outbuilding - £10,047

Build a Mansard loft conversion - £52,047

Loft conversion - £34,193

Build a kitchen extension - £42,047

Hip to gable loft conversion - £42,047

Granny annexe - £87,047

Garden office - £10,047

Convert a Garage - £16,047

Garage - £18,547

Build a flat roof extension - £22,047

Build a dormer loft conversion - £42,047

Concrete foundations - £6,297

Convert a bungalow loft - £29,047

Convert a basement - £38,031