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Vasile Boghean
Optimus Build Solutions delivers exceptional construction services in London and surronding areas. Specializing in bathroom and kitchen refurbishme...
Darren Spencer
Need an Extension Builder in Brentwood? Ellis & James Builders Limited has been helping local clients (20 mile radius) with their extension builder...
Trusted and professional extension builder in Brentwood. Experienced in all extension buildering work and keeping within budget and on quote. V&L C...
Brentwood, CM13
Lovehome Construction is an established and experienced local extension builder in Brentwood. Please contact us for a free, no obligation quote and...
Relax... you have found a reliable extension builder in Brentwood. A Star Construction is a friendly and reliable company based in Brentwood who co...
CLYDESDALE CONSTRUCTION LTD is an established extension buildering business in Brentwood. We come highly recommended and provide competitive quotes...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Q Boss D&B is an established extension buildering business in Brentwood. We come highly recommended and provide competitive quotes for your work.
Need to find an Extension Builder near you for all your extension buildering work?
KERFIELD BUILDING SERVICES LTD provides a local, trusted...
Peter Prendi
Prendi Construction Ltd is an established and experienced local extension builder in Brentwood. Please contact us for a free, no obligation quote a...

Outbuilding costs in Brentwood range from the cheapest of £9,816 (Lovehome Construction based in CM13) to the dearest of £11,232 (Optimus Build Solutions based in Rm1), but these are just estimates.
Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build an outbuilding in Brentwood by posting a job with HaMuch and we will send it to extension builders.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Outbuilding near Brentwood | £39 | £255 |
| Outbuilding near Billericay | £38 | £248 |
| Outbuilding near Basildon | £39 | £251 |
| Outbuilding near Romford | £45 | £274 |
| Outbuilding near Stanford-le-Hope | £40 | £254 |
| Outbuilding near South Ockendon | £42 | £264 |
| Outbuilding near Thurrock | £41 | £260 |
| Outbuilding near Wickford | £39 | £255 |
| Outbuilding near Chafford Hundred | £41 | £261 |
| Outbuilding near Grays | £41 | £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 - £17,770

Two storey extension - £88,404

Build a timber frame extension - £26,270

Build a swimming pool - £81,270

Single storey extension - £60,392

Side return extension - £44,533

Install an RSJ - £2,470

Outbuilding - £10,270

Build a Mansard loft conversion - £52,270

Loft conversion - £36,278

Build a kitchen extension - £42,270

Hip to gable loft conversion - £42,270

Granny annexe - £87,270

Garden office - £10,270

Convert a Garage - £16,270

Garage - £18,770

Build a flat roof extension - £22,270

Build a dormer loft conversion - £42,270

Concrete foundations - £6,520

Convert a bungalow loft - £29,270

Convert a basement - £40,533