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Relax... you have found a reliable extension builder in SM1. GDW Construction is a friendly and reliable company based in SM1 who consider no job a...
Relax... you have found a reliable extension builder in SM1. D & R Roofing & Loft Conversions, Building & Design is a friendly and reliable company...
Hilton building contractors ltd is a trusted extension builder serving customers in SM1 and the surrounding area. Contact us to today to get a comp...
Relax... you have found a reliable extension builder in SM1. Amazing Space Design and Build Ltd. is a friendly and reliable company based in SM1 wh...
RM Sanwell Roofing is a trusted extension builder serving customers in SM1 and the surrounding area. Contact us to today to get a competitive quote...
Trusted and professional extension builder in SM1. Experienced in all extension buildering work and keeping within budget and on quote. CSJ Buildin...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Experienced extension builder ready to quote for your work. NCN Projects is the best extension builder in SM1. No obligation free quotes and many h...
SEDGWICK BUILDING SERVICES LLP are here to help customers who need an Extension Builder in SM1. We offer a competitive rate to complete all your ex...
REA CONSTRUCTION LTD are here to help customers who need an Extension Builder in SM1. We offer a competitive rate to complete all your extension bu...

Garden offices range from the cheapest of £9,936 (Masters Property Services based in SM5) to the dearest of £10,800 (GDW Construction based in SM3), 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 SM1 by posting a job with HaMuch. We'll send it to extension builders in SM1.
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 - £17,722

Two storey extension - £88,332

Build a timber frame extension - £26,222

Build a swimming pool - £81,222

Single storey extension - £59,432

Side return extension - £43,993

Install an RSJ - £2,422

Outbuilding - £10,222

Build a Mansard loft conversion - £52,222

Loft conversion - £35,828

Build a kitchen extension - £42,222

Hip to gable loft conversion - £42,222

Granny annexe - £87,222

Garden office - £10,222

Convert a Garage - £16,222

Garage - £18,722

Build a flat roof extension - £22,222

Build a dormer loft conversion - £42,222

Concrete foundations - £6,472

Convert a bungalow loft - £29,222

Convert a basement - £39,993