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Select your affordable GU21 extension builder
Need to find an Extension Builder near you for all your extension buildering work?
Chim Me Sweep Chim Me Build provides a local, trusted ex...
Relax... you have found a reliable extension builder in GU21. DILCONSI CONSTRUCTION is a friendly and reliable company based in GU21 who consider n...
Need to find an Extension Builder near you for all your extension buildering work?
GS Wood Building Services provides a local, trusted exte...
ADO Builders is a trusted extension builder serving customers in GU21 and the surrounding area. Contact us to today to get a competitive quote for ...
At RSS Building Services we are a team of highly trained tradesmen, with up to 30 years experience in the building trade. We endeavour to provide t...
Experienced extension builder ready to quote for your work. GM Bailey and Sons Ltd is the best extension builder in GU21. No obligation free quotes...
BETTER BUILDS (JAMES) is an established and experienced local extension builder in GU21. Please contact us for a free, no obligation quote and comp...
From £52,264
Awb are here to help customers who need an Extension Builder in GU21. We offer a competitive rate to complete all your extension buildering jobs to...
From £52,232
Experienced extension builder ready to quote for your work. Arrus Knoble Ltd is the best extension builder in GU21. No obligation free quotes and m...
From £52,336
Relax... you have found a reliable extension builder in GU21. Yaro Construction Ltd is a friendly and reliable company based in GU21 who consider n...

Mansard loft conversions range from the cheapest installation of £51,952 (ADO Builders based in GU22) to the dearest of around £52,464 (BETTER BUILDS (JAMES) based in GU21).
While these estimates give you a good idea how much you'll pay for a mansard loft conversion, the only way to get an accurate price is to get real quotes from real builders.
Get quotes to install a mansard loft conversion in GU21 by posting a job with HaMuch and we'll send it to extension builders in GU21.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Mansard Loft Conversion near Woking | £43 | £277 |
| Build A Mansard Loft Conversion near New Haw | £43 | £273 |
| Build A Mansard Loft Conversion near Guildford | £53 | £298 |
| Build A Mansard Loft Conversion near Ascot | £41 | £276 |
| Build A Mansard Loft Conversion near Camberley | £40 | £268 |
| Build A Mansard Loft Conversion near Ash Vale | £41 | £277 |
| Build A Mansard Loft Conversion near Egham | £42 | £266 |
| Build A Mansard Loft Conversion near Farnborough | £41 | £272 |
| Build A Mansard Loft Conversion near Staines-upon-Thames | £42 | £269 |
| Build A Mansard Loft Conversion near Walton-on-Thames | £43 | £277 |
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 - £17,688

Two storey extension - £88,282

Build a timber frame extension - £26,188

Build a swimming pool - £81,188

Single storey extension - £58,760

Side return extension - £43,615

Install an RSJ - £2,388

Outbuilding - £10,188

Build a Mansard loft conversion - £52,188

Loft conversion - £35,513

Build a kitchen extension - £42,188

Hip to gable loft conversion - £42,188

Granny annexe - £87,188

Garden office - £10,188

Convert a Garage - £16,188

Garage - £18,688

Build a flat roof extension - £22,188

Build a dormer loft conversion - £42,188

Concrete foundations - £6,438

Convert a bungalow loft - £29,188

Convert a basement - £39,615