From £10,008
Need to find an Extension Builder near you for all your extension buildering work?
Tj's Fencing provides a local, trusted extension builder...
From £9,808
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £9,936
Extensions, Refurbishments & Loft ConversionsAt Keystone our mission is to help our clients imagine, design & build environments that enhance their...
From £10,112
Experienced extension builder ready to quote for your work. MRA CONSTRUCTION is the best extension builder in Mid Sussex. No obligation free quotes...
From £10,600
Rjscarpentryconstruction is a well established company with over 30 years of experience in the carpentry and construction industries
From £9,848
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £9,288
I have been in the building trade for over 20 years and run my own business for the last 10 years. I am very reliable and have plenty of experience...
From £9,856
HEVIN BUILDERS is an established extension buildering business in Mid Sussex. We come highly recommended and provide competitive quotes for your wo...
From £10,360
TOLLEY CARPENTRY is an established extension buildering business in Mid Sussex. We come highly recommended and provide competitive quotes for your ...
From £10,064
JG Brickwork Services Limited is an established extension buildering business in Mid Sussex. We come highly recommended and provide competitive quo...

Garden offices range from the cheapest of £9,288 (JUST ONE BUILDING SERVICES based in RH11) to the dearest of £10,600 (RJ's Carpentry Construction based in RH15), 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 Mid Sussex by posting a job with HaMuch. We'll send it to extension builders in Mid Sussex.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near Mid Sussex | £35 | £261 |
| Garden Office near Haywards Heath | £35 | £256 |
| Garden Office near Burgess Hill | £36 | £240 |
| Garden Office near Crawley | £38 | £255 |
| Garden Office near East Grinstead | £37 | £259 |
| Garden Office near Horsham | £38 | £265 |
| Garden Office near Horley | £38 | £258 |
| Garden Office near Crowborough | £36 | £258 |
| Garden Office near Brighton and Hove | £35 | £251 |
| Garden Office near Redhill | £41 | £269 |
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 - £17,488

Two storey extension - £87,982

Build a timber frame extension - £25,988

Build a swimming pool - £80,988

Single storey extension - £54,760

Side return extension - £41,365

Install an RSJ - £2,188

Outbuilding - £9,988

Build a Mansard loft conversion - £51,988

Loft conversion - £33,638

Build a kitchen extension - £41,988

Hip to gable loft conversion - £41,988

Granny annexe - £86,988

Garden office - £9,988

Convert a Garage - £15,988

Garage - £18,488

Build a flat roof extension - £21,988

Build a dormer loft conversion - £41,988

Concrete foundations - £6,238

Convert a bungalow loft - £28,988

Convert a basement - £37,365