From £10,416
Surrey, KT15
Need to find an Extension Builder near you for all your extension buildering work?
Tolwey provides a local, trusted extension buildering se...
From £10,136
EcoWoodDesign are here to help customers who need an Extension Builder in KT15. We offer a competitive rate to complete all your extension builderi...
From £10,080
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £10,528
As a successful Surrey Property building Company, we pride ourselves not only on what we produce for our clients, but also the manner that we appro...
From £9,760
We are a company based in South London, with a strong will to work and to do the best job possible every tine we start a job (big or small) because...
From £10,296
CRESSWELL DESIGN & BUILD are here to help customers who need an Extension Builder in KT15. We offer a competitive rate to complete all your extensi...
From £10,240
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £10,008
Need to find an Extension Builder near you for all your extension buildering work?
GS Wood Building Services provides a local, trusted exte...
From £10,080
General Building, Landscaping and Driveway Specialists. Some of the tasks we complete tasks such as refurbishments, extensions and conversions to d...
From £9,672
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Outbuilding costs in KT15 range from the cheapest of £9,672 (Inspiral Construction based in KT16) to the dearest of £10,528 (JDM (D&B) Ltd based in Kt14), but these are just estimates.
Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build an outbuilding in KT15 by posting a job with HaMuch and we will send it to extension builders.
| Borough in London |
|---|
| Outbuilding in Addlestone |
| Outbuilding in Chertsey |
| Outbuilding in Byfleet |
| Outbuilding in Weybridge |
| Outbuilding in Shepperton |
| Outbuilding in Walton-on-Thames |
| Outbuilding in Virginia Water |
| Outbuilding in Woking |
| Outbuilding in Staines |
| Outbuilding in Ripley |
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 - £17,622

Two storey extension - £88,182

Build a timber frame extension - £26,122

Build a swimming pool - £81,122

Single storey extension - £57,432

Side return extension - £42,868

Install an RSJ - £2,322

Outbuilding - £10,122

Build a Mansard loft conversion - £52,122

Loft conversion - £34,890

Build a kitchen extension - £42,122

Hip to gable loft conversion - £42,122

Granny annexe - £87,122

Garden office - £10,122

Convert a Garage - £16,122

Garage - £18,622

Build a flat roof extension - £22,122

Build a dormer loft conversion - £42,122

Concrete foundations - £6,372

Convert a bungalow loft - £29,122

Convert a basement - £38,868