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David Oreilly
We are a family run business we 40 years experience delivering multiple projects from new developments . Extension. Loft conversion. Including foun...
Need to find an Extension Builder near you for all your extension buildering work?
DPP Construction (David Price Partnership) provides a lo...
Trusted and professional extension builder in Horley. Experienced in all extension buildering work and keeping within budget and on quote. D B Jone...
ALBANA PERANA
The Reigate Marble Shop LTD.
Established in 2005, The Reigate Marble Shop...
Horley, RH6
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Need to find an Extension Builder near you for all your extension buildering work?
S C H BUILDING SERVICES provides a local, trusted extens...
Apsley Wall Ltd is an established extension buildering business in Horley. We come highly recommended and provide competitive quotes for your work....
Trusted and professional extension builder in Horley. Experienced in all extension buildering work and keeping within budget and on quote. Dance & ...
Crawley Construction Ltd
Contact us: 07454160840 Email: enquiries@ We are a family run business since 15 year’s+. We are build on tru...

Building a granny annexe ranges from £86,728 (Apsley Wall Ltd based in RH19) to £87,336 (Dance & Co Developments based in RH19), 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 Horley by posting a job with HaMuch. We will send it to extension builders in Horley who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Horley | £38 | £258 |
| Granny Annexe near Crawley | £38 | £255 |
| Granny Annexe near Redhill | £41 | £269 |
| Granny Annexe near Reigate | £40 | £270 |
| Granny Annexe near East Grinstead | £37 | £259 |
| Granny Annexe near Reigate & Banstead | £41 | £271 |
| Granny Annexe near Caterham | £43 | £271 |
| Granny Annexe near Tadworth | £41 | £271 |
| Granny Annexe near Mid Sussex | £35 | £261 |
| Granny Annexe near Horsham | £38 | £265 |
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 - £17,543

Two storey extension - £88,065

Build a timber frame extension - £26,043

Build a swimming pool - £81,043

Single storey extension - £55,864

Side return extension - £41,986

Install an RSJ - £2,243

Outbuilding - £10,043

Build a Mansard loft conversion - £52,043

Loft conversion - £34,155

Build a kitchen extension - £42,043

Hip to gable loft conversion - £42,043

Granny annexe - £87,043

Garden office - £10,043

Convert a Garage - £16,043

Garage - £18,543

Build a flat roof extension - £22,043

Build a dormer loft conversion - £42,043

Concrete foundations - £6,293

Convert a bungalow loft - £29,043

Convert a basement - £37,986