From £87,216
Northolt, UB5
MJO CONSTRUCTION LIMITED are here to help customers who need an Extension Builder in UB5. We offer a competitive rate to complete all your extensio...
From £86,952
Need to find an Extension Builder near you for all your extension buildering work?
HWB Construction Ltd provides a local, trusted extension...
From £87,000
Northolt, UB5
Vital Builders are here to help customers who need an Extension Builder in UB5. We offer a competitive rate to complete all your extension builderi...
From £87,528
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 £87,424
Trusted and professional extension builder in UB5. Experienced in all extension buildering work and keeping within budget and on quote. PRIME BUILD...
From £87,384
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,216
Our team of professional builders, provide complete renovation services to private and business clients within North, north-west London and surrou...
From £87,048
EXTEND.HOUSE is a trusted extension builder serving customers in UB5 and the surrounding area. Contact us to today to get a competitive quote for e...
From £87,064
We focus mainly on major reconstructions of basements, lofts, extensions as well as new-build. We work with architects, construction site inspector...

Building a granny annexe ranges from £86,584 (TTM Improve Homes based in UB5) to £87,528 (Platinum Pearl Construction Ltd based in UB6), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in UB5 by posting a job with HaMuch. We will send it to extension builders in UB5 who will be happy to help you.
| Borough in London |
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| Granny Annexe in Northolt |
| Granny Annexe in Greenford |
| Granny Annexe in Yeading |
| Granny Annexe in Southall |
| Granny Annexe in Rayners Lane |
| Granny Annexe in Ruislip |
| Granny Annexe in Hanwell |
| Granny Annexe in Harrow |
| Granny Annexe in Southall |
| Granny Annexe 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