Trusted and professional extension builder in BN3. Experienced in all extension buildering work and keeping within budget and on quote. Good Constr...
Experienced extension builder ready to quote for your work. Brighton Marina Hand Car Wash is the best extension builder in BN3. No obligation free ...
Relax... you have found a reliable extension builder in BN3. R & G Construction Brighton Ltd is a friendly and reliable company based in BN3 who co...
Graeme Davies
Experienced extension builder ready to quote for your work. Graeme Davies Plumbing and Heating is the best extension builder in BN3. No obligation ...
Experienced extension builder ready to quote for your work. CITY BUILDING SERVICES LIMITED is the best extension builder in BN3. No obligation free...
CAMBRIDGE BUILDING SERVICES is a trusted extension builder serving customers in BN3 and the surrounding area. Contact us to today to get a competit...
Tony Paice
Master builder since 1960 new build and refurb all trades many photo albums to show
Trusted and professional extension builder in BN3. Experienced in all extension buildering work and keeping within budget and on quote. RA Construc...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Need to find an Extension Builder near you for all your extension buildering work?
FIRST FORMAT BUILDING provides a local, trusted extensio...

Garden offices range from the cheapest of £9,768 (Graeme Davies Plumbing and Heating based in BN3) to the dearest of £11,120 (CITY BUILDING SERVICES LIMITED based in BN2), 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 BN3 by posting a job with HaMuch. We'll send it to extension builders in BN3.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near Brighton | £35 | £251 |
| Garden Office near Brighton and Hove | £35 | £251 |
| Garden Office near Shoreham-by-Sea | £36 | £250 |
| Garden Office near Lancing | £36 | £249 |
| Garden Office near Burgess Hill | £36 | £240 |
| Garden Office near Worthing | £35 | £249 |
| Garden Office near Haywards Heath | £35 | £256 |
| Garden Office near Seaford | £34 | £243 |
| Garden Office near Rustington | £35 | £242 |
| Garden Office near Mid Sussex | £35 | £261 |
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 - £17,597

Two storey extension - £88,145

Build a timber frame extension - £26,097

Build a swimming pool - £81,097

Single storey extension - £56,936

Side return extension - £42,589

Install an RSJ - £2,297

Outbuilding - £10,097

Build a Mansard loft conversion - £52,097

Loft conversion - £34,658

Build a kitchen extension - £42,097

Hip to gable loft conversion - £42,097

Granny annexe - £87,097

Garden office - £10,097

Convert a Garage - £16,097

Garage - £18,597

Build a flat roof extension - £22,097

Build a dormer loft conversion - £42,097

Concrete foundations - £6,347

Convert a bungalow loft - £29,097

Convert a basement - £38,589