From £9,880
Member since August 2025
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £11,584
Propello is an established and experienced local extension builder in Billericay West. Please contact us for a free, no obligation quote and compe...
From £10,424
Nouvell Decor is a trusted extension builder serving customers in Billericay West and the surrounding area. Contact us to today to get a competitiv...
From £10,184
Experienced extension builder ready to quote for your work. CC&D BUILDING LTD is the best extension builder in Billericay West. No obligation free ...
From £10,312
skilled worker who specializes in completing a wide range of building and renovation projects
From £10,616
HOUSE BUILDING SERVICES LIMITED is a trusted extension builder serving customers in Billericay West and the surrounding area. Contact us to today t...
From £10,240
M&J Brickwork Ltd are a Chelmsford based Bricklaying & General Building company that operate throughout the Essex and South London...
From £10,200
Relax... you have found a reliable extension builder in Billericay West. Derryard Construction Ltd is a friendly and reliable company based in Bill...
From £9,968
B J CULLEN BUILDERS are here to help customers who need an Extension Builder in Billericay West. We offer a competitive rate to complete all your e...
From £10,032
Relax... you have found a reliable extension builder in Billericay West. Major Building Contractors Ltd is a friendly and reliable company based in...

Garden offices range from the cheapest of £9,880 (Can design and Construction based in Ig11) to the dearest of £11,584 (Propello based in E17), 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 Billericay West by posting a job with HaMuch. We'll send it to extension builders in Billericay West.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near Billericay | £38 | £248 |
| Garden Office near Brentwood | £39 | £255 |
| Garden Office near Basildon | £39 | £251 |
| Garden Office near Wickford | £39 | £255 |
| Garden Office near Stanford-le-Hope | £40 | £254 |
| Garden Office near Chelmsford | £38 | £258 |
| Garden Office near Rayleigh | £39 | £252 |
| Garden Office near Thundersley | £38 | £251 |
| Garden Office near Thurrock | £41 | £260 |
| Garden Office near Chafford Hundred | £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 - £17,844

Two storey extension - £88,516

Build a timber frame extension - £26,344

Build a swimming pool - £81,344

Single storey extension - £61,880

Side return extension - £45,370

Install an RSJ - £2,544

Outbuilding - £10,344

Build a Mansard loft conversion - £52,344

Loft conversion - £36,975

Build a kitchen extension - £42,344

Hip to gable loft conversion - £42,344

Granny annexe - £87,344

Garden office - £10,344

Convert a Garage - £16,344

Garage - £18,844

Build a flat roof extension - £22,344

Build a dormer loft conversion - £42,344

Concrete foundations - £6,594

Convert a bungalow loft - £29,344

Convert a basement - £41,370