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Chris Czerwinski
About us: Buildmac Ltd is a well-established, trustworthy, reliable and professional business based in High Wycombe, covering all surrounding areas...
Relax... you have found a reliable extension builder in High Wycombe. ABC Associates STRUCTURES 4 U is a friendly and reliable company based in Hig...
B.A Ruffle Building Contractor is an established extension buildering business in High Wycombe. We come highly recommended and provide competitive ...
Relax... you have found a reliable extension builder in High Wycombe. Building High Wycombe is a friendly and reliable company based in High Wycomb...
Mitchell & Co Building & Renovations Ltd is an established extension buildering business in High Wycombe. We come highly recommended and provide co...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Be Illuminated are here to help customers who need an Extension Builder in High Wycombe. We offer a competitive rate to complete all your extension...
Steve Knight Construction is a High Wycombe based Building Company with 38 years experience in all aspects of the Construction Industry. We are abl...
GREENWORKS CONSTRUCTION is an established and experienced local extension builder in High Wycombe. Please contact us for a free, no obligation quot...
Need to find an Extension Builder near you for all your extension buildering work?
JAYEM BUILDING SERVICES LTD provides a local, trusted ex...

Building a granny annexe ranges from £87,032 (GREENWORKS CONSTRUCTION based in SL7) to £87,392 (Jesson ladscaping and construction based in hp15), 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 High Wycombe by posting a job with HaMuch. We will send it to extension builders in High Wycombe who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near High Wycombe | £39 | £272 |
| Granny Annexe near Wycombe | £40 | £271 |
| Granny Annexe near Hazlemere | £40 | £272 |
| Granny Annexe near Maidenhead | £41 | £273 |
| Granny Annexe near Chesham | £42 | £277 |
| Granny Annexe near Gerrards Cross | £43 | £283 |
| Granny Annexe near Slough | £42 | £272 |
| Granny Annexe near Windsor & Maidenhead | £42 | £272 |
| Granny Annexe near Windsor | £41 | £271 |
| Granny Annexe near Rickmansworth | £43 | £282 |
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 - £17,703

Two storey extension - £88,305

Build a timber frame extension - £26,203

Build a swimming pool - £81,203

Single storey extension - £59,064

Side return extension - £43,786

Install an RSJ - £2,403

Outbuilding - £10,203

Build a Mansard loft conversion - £52,203

Loft conversion - £35,655

Build a kitchen extension - £42,203

Hip to gable loft conversion - £42,203

Granny annexe - £87,203

Garden office - £10,203

Convert a Garage - £16,203

Garage - £18,703

Build a flat roof extension - £22,203

Build a dormer loft conversion - £42,203

Concrete foundations - £6,453

Convert a bungalow loft - £29,203

Convert a basement - £39,786