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Relax... you have found a reliable extension builder in Banstead. GDW Construction is a friendly and reliable company based in Banstead who conside...
Need to find an Extension Builder near you for all your extension buildering work?
OAK HOUSE BESPOKE BUILDERS provides a local, trusted ext...
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in Banstead. No obligation free qu...
From £11,200
Sebastian Banga
Member since August 2025
Banga decoration. Is Base in south London for number of year Banga decoration is a small company. Wich provide an excellent job to the custom...
John Mcdonagh
Watch our short video highlighting all our expertise and services here:
more than 10 y...
Gani Bush
Gb construction are here to help customers who need an Extension Builder in Banstead. We offer a competitive rate to complete all your extension b...
Relax... you have found a reliable extension builder in Banstead. D & R Roofing & Loft Conversions, Building & Design is a friendly and reliable co...
Trusted and professional extension builder in Banstead. Experienced in all extension buildering work and keeping within budget and on quote. J & D ...
Langston Builders is a trusted extension builder serving customers in Banstead and the surrounding area. Contact us to today to get a competitive q...

Garden offices range from the cheapest of £10,048 (J&J Building Solutions based in SW16) to the dearest of £11,200 (Banga Decoration based in CR7), but these are only estimates.
The best way to compare costs is to get actual quotes.
Get rates and quotes to build a garden office in Banstead by posting a job with HaMuch. We'll send it to extension builders in Banstead.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near Epsom | £44 | £275 |
| Garden Office near Reigate & Banstead | £41 | £271 |
| Garden Office near Tadworth | £41 | £271 |
| Garden Office near Ewell | £44 | £275 |
| Garden Office near Sutton | £43 | £274 |
| Garden Office near Merton | £43 | £272 |
| Garden Office near Caterham | £43 | £271 |
| Garden Office near Reigate | £40 | £270 |
| Garden Office near Redhill | £41 | £269 |
| Garden Office near Croydon | £42 | £267 |
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 - £17,867

Two storey extension - £88,551

Build a timber frame extension - £26,367

Build a swimming pool - £81,367

Single storey extension - £62,344

Side return extension - £45,631

Install an RSJ - £2,567

Outbuilding - £10,367

Build a Mansard loft conversion - £52,367

Loft conversion - £37,193

Build a kitchen extension - £42,367

Hip to gable loft conversion - £42,367

Granny annexe - £87,367

Garden office - £10,367

Convert a Garage - £16,367

Garage - £18,867

Build a flat roof extension - £22,367

Build a dormer loft conversion - £42,367

Concrete foundations - £6,617

Convert a bungalow loft - £29,367

Convert a basement - £41,631