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Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in City Of Westminster. No obligat...
Robert Buci
Buci builders ltd is a trusted extension builder serving customers in City Of Westminster and the surrounding area. Contact us to today to get a co...
Relax... you have found a reliable extension builder in City Of Westminster. L H Builders is a friendly and reliable company based in City Of Westm...
HARLEY BUILDING SERVICES LTD are here to help customers who need an Extension Builder in City Of Westminster. We offer a competitive rate to comple...
D Bradshaw Building Renovation is a trusted extension builder serving customers in City Of Westminster and the surrounding area. Contact us to toda...
Samuele Paolini
Need an Extension Builder in City Of Westminster? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering j...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
V.S.P is a trusted extension builder serving customers in City Of Westminster and the surrounding area. Contact us to today to get a competitive qu...
Jonathan Rimmer
Experienced extension builder ready to quote for your work. Mr is the best extension builder in City Of Westminster. No obligation free quotes and ...

Building a granny annexe ranges from £86,904 (V.S.P based in NW10) to £88,024 (Buci builders ltd based in SE27), 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 City Of Westminster by posting a job with HaMuch. We will send it to extension builders in City Of Westminster who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near London | £43 | £273 |
| Granny Annexe near Camden Town | £44 | £277 |
| Granny Annexe near Belgravia | £44 | £276 |
| Granny Annexe near Chelsea | £44 | £276 |
| Granny Annexe near Lambeth | £44 | £275 |
| Granny Annexe near Kensington | £44 | £277 |
| Granny Annexe near Islington | £45 | £276 |
| Granny Annexe near Fulham | £44 | £278 |
| Granny Annexe near Camberwell | £44 | £276 |
| Granny Annexe near Bethnal Green | £45 | £276 |
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 - £17,718

Two storey extension - £88,326

Build a timber frame extension - £26,218

Build a swimming pool - £81,218

Single storey extension - £59,352

Side return extension - £43,948

Install an RSJ - £2,418

Outbuilding - £10,218

Build a Mansard loft conversion - £52,218

Loft conversion - £35,790

Build a kitchen extension - £42,218

Hip to gable loft conversion - £42,218

Granny annexe - £87,218

Garden office - £10,218

Convert a Garage - £16,218

Garage - £18,718

Build a flat roof extension - £22,218

Build a dormer loft conversion - £42,218

Concrete foundations - £6,468

Convert a bungalow loft - £29,218

Convert a basement - £39,948