From £10,024
House Construction ltd is a trusted extension builder serving customers in BN1 and the surrounding area. Contact us to today to get a competitive q...
From £10,008
Business CategoriesBathroom Planners and Furnishers, Builders, Building Services, Cabinet Makers, Decking, Flooring Services, Home Improvem...
From £9,856
Orchard Timberworks is a Brighton based Carpentry and Joinery business, located in the beautiful South Downs. We specialise in custom Carpentry and...
From £10,128
Build Safe Ltd is an established and experienced local extension builder in BN1. Please contact us for a free, no obligation quote and competitive ...
From £10,072
Relax... you have found a reliable extension builder in BN1. R & G Construction Brighton Ltd is a friendly and reliable company based in BN1 who co...
From £9,696
Trusted and professional extension builder in BN1. Experienced in all work and keeping within budget and on quote. Construct Brighton have many ha...
From £9,832
Need to find an Extension Builder near you for all your work?
Bright Green Homes LLP provides a local, trusted service in and around BN1....
From £9,840
The studio is based on our founder's vision in concept and interior design, Fabio Lauro has long been in the business of creating atmospheres. His ...
From £9,864
Brightspace Renovations is an established business in BN1. We come highly recommended and provide competitive quotes for your work.
From £10,080
We are a small, professional and friendly team of Interior Designers and Project Managers working in Brighton, London, Sussex and the South East. W...

Garden offices range from the cheapest of £9,696 (Construct Brighton based in BN1) to the dearest of £10,128 (Build Safe Ltd based in BN1), 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 BN1 by posting a job with HaMuch. We'll send it to extension builders in BN1.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near Brighton and Hove | £30 | £219 |
| Garden Office near Brighton | £30 | £219 |
| Garden Office near Shoreham-by-Sea | £31 | £217 |
| Garden Office near Burgess Hill | £31 | £208 |
| Garden Office near Lancing | £32 | £219 |
| Garden Office near Worthing | £31 | £222 |
| Garden Office near Haywards Heath | £30 | £222 |
| Garden Office near Seaford | £30 | £214 |
| Garden Office near Mid Sussex | £30 | £224 |
| Garden Office near Rustington | £32 | £220 |
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 - £17,440

Two storey extension - £87,910

Build a timber frame extension - £25,940

Build a swimming pool - £80,940

Single storey extension - £53,800

Side return extension - £40,825

Install an RSJ - £2,140

Outbuilding - £9,940

Build a Mansard loft conversion - £51,940

Loft conversion - £33,188

Build a kitchen extension - £41,940

Hip to gable loft conversion - £41,940

Granny annexe - £86,940

Garden office - £9,940

Convert a Garage - £15,940

Garage - £18,440

Build a flat roof extension - £21,940

Build a dormer loft conversion - £41,940

Concrete foundations - £6,190

Convert a bungalow loft - £28,940

Convert a basement - £36,825