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Mandala Building Services is a family-owned design and build maintenance company, encompassing everything from residential refurbishment to large-s...
Relax... you have found a reliable extension builder in Oxhey. L H Builders is a friendly and reliable company based in Oxhey who consider no job a...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Bill Matharu
Matharu Buildings is an established extension buildering business in Oxhey. We come highly recommended and provide competitive quotes for your work...
Need to find an Extension Builder near you for all your extension buildering work?
Fitz Building Services Limited provides a local, trusted...
EDGWARE BUILDER are here to help customers who need an Extension Builder in Oxhey. We offer a competitive rate to complete all your extension build...
HARLEY BUILDING SERVICES LTD are here to help customers who need an Extension Builder in Oxhey. We offer a competitive rate to complete all your ex...
D Bradshaw Building Renovation is a trusted extension builder serving customers in Oxhey and the surrounding area. Contact us to today to get a com...
J Wijayamohan
JJSR Construction Ltd is an established and experienced local extension builder in Oxhey. Please contact us for a free, no obligation quote and com...
Oxhey Herts, WD19
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...

Building a granny annexe ranges from £86,960 (HARLEY BUILDING SERVICES LTD based in NW9) to £87,512 (Mandala Building Services based in WD6), 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 Oxhey by posting a job with HaMuch. We will send it to extension builders in Oxhey who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Watford | £43 | £280 |
| Granny Annexe near Bushey | £43 | £278 |
| Granny Annexe near Rickmansworth | £43 | £282 |
| Granny Annexe near Harrow | £43 | £270 |
| Granny Annexe near Borehamwood | £42 | £271 |
| Granny Annexe near Hillingdon | £43 | £276 |
| Granny Annexe near Gerrards Cross | £43 | £283 |
| Granny Annexe near Brent Cross | £43 | £273 |
| Granny Annexe near High Barnet | £43 | £272 |
| Granny Annexe near St Albans | £43 | £272 |
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 - £17,691

Two storey extension - £88,287

Build a timber frame extension - £26,191

Build a swimming pool - £81,191

Single storey extension - £58,824

Side return extension - £43,651

Install an RSJ - £2,391

Outbuilding - £10,191

Build a Mansard loft conversion - £52,191

Loft conversion - £35,543

Build a kitchen extension - £42,191

Hip to gable loft conversion - £42,191

Granny annexe - £87,191

Garden office - £10,191

Convert a Garage - £16,191

Garage - £18,691

Build a flat roof extension - £22,191

Build a dormer loft conversion - £42,191

Concrete foundations - £6,441

Convert a bungalow loft - £29,191

Convert a basement - £39,651