From £10,216
MJO CONSTRUCTION LIMITED are here to help customers who need an Extension Builder in Northolt. We offer a competitive rate to complete all your ext...
From £9,952
Northolt Harrow, UB5
Need to find an Extension Builder near you for all your extension buildering work?
HWB Construction Ltd provides a local, trusted extension...
From £10,000
Vital Builders are here to help customers who need an Extension Builder in Northolt. We offer a competitive rate to complete all your extension bui...
From £10,528
Platinum Pearl Construction Ltd originated as a small general building services company over 10 years ago and have now grown into the multi-faceted...
From £10,424
Trusted and professional extension builder in Northolt. Experienced in all extension buildering work and keeping within budget and on quote. PRIME ...
From £10,384
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £10,216
Our team of professional builders, provide complete renovation services to private and business clients within North, north-west London and surrou...
From £10,048
EXTEND.HOUSE is a trusted extension builder serving customers in Northolt and the surrounding area. Contact us to today to get a competitive quote ...
From £10,064
We focus mainly on major reconstructions of basements, lofts, extensions as well as new-build. We work with architects, construction site inspector...

Garden offices range from the cheapest of £9,584 (TTM Improve Homes based in UB5) to the dearest of £10,528 (Platinum Pearl Construction Ltd based in UB6), 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 Northolt by posting a job with HaMuch. We'll send it to extension builders in Northolt.
| Borough in London |
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| Garden Office in Northolt |
| Garden Office in Greenford |
| Garden Office in Yeading |
| Garden Office in Southall |
| Garden Office in Rayners Lane |
| Garden Office in Ruislip |
| Garden Office in Hanwell |
| Garden Office in Harrow |
| Garden Office in Southall |
| Garden Office in Sudbury |
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 - £17,642

Two storey extension - £88,212

Build a timber frame extension - £26,142

Build a swimming pool - £81,142

Single storey extension - £57,832

Side return extension - £43,093

Install an RSJ - £2,342

Outbuilding - £10,142

Build a Mansard loft conversion - £52,142

Loft conversion - £35,078

Build a kitchen extension - £42,142

Hip to gable loft conversion - £42,142

Granny annexe - £87,142

Garden office - £10,142

Convert a Garage - £16,142

Garage - £18,642

Build a flat roof extension - £22,142

Build a dormer loft conversion - £42,142

Concrete foundations - £6,392

Convert a bungalow loft - £29,142

Convert a basement - £39,093