From £86,552
Need an Extension Builder in SA8? Calon Construction Ltd has been helping local clients (20 mile radius) with their extension buildering jobs for m...
From £86,760
Marin Hughes General Builders is a trusted extension builder serving customers in SA8 and the surrounding area. Contact us to today to get a compet...
From £86,824
Evans Home Improvements are here to help customers who need an Extension Builder in SA8. We offer a competitive rate to complete all your extension...
From £86,816
Dale Hopkins is an established and experienced local extension builder in SA8. Please contact us for a free, no obligation quote and competitive ra...
From £86,936
A Room at the Top are here to help customers who need an Extension Builder in SA8. We offer a competitive rate to complete all your extension build...
From £87,008
Experienced extension builder ready to quote for your work. D J Howells is the best extension builder in SA8. No obligation free quotes and many ha...
From £86,976
Trusted and professional extension builder in SA8. Experienced in all extension buildering work and keeping within budget and on quote. HALL & HARR...
From £86,632
Karina Lane Construction Ltd are here to help customers who need an Extension Builder in SA8. We offer a competitive rate to complete all your exte...
From £86,968
S H PHILLIPS BUILDING CONTRACT are here to help customers who need an Extension Builder in SA8. We offer a competitive rate to complete all your ex...
From £86,824
Experienced extension builder ready to quote for your work. CR BUILDING & MAINTENANCE SERV is the best extension builder in SA8. No obligation free...

Building a granny annexe ranges from £86,552 (Calon Construction Ltd based in SA7) to £87,008 (D J Howells based in SA18), 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 SA8 by posting a job with HaMuch. We will send it to extension builders in SA8 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Neath | £30 | £225 |
| Granny Annexe near Neath Port Talbot | £31 | £224 |
| Granny Annexe near Swansea | £29 | £229 |
| Granny Annexe near Port Talbot | £31 | £227 |
| Granny Annexe near Gorseinon | £29 | £228 |
| Granny Annexe near Maesteg | £38 | £283 |
| Granny Annexe near Llanelli | £29 | £231 |
| Granny Annexe near Pyle | £34 | £262 |
| Granny Annexe near Aberdare | £32 | £212 |
| Granny Annexe near Porthcawl | £33 | £252 |
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 - £17,330

Two storey extension - £87,744

Build a timber frame extension - £25,830

Build a swimming pool - £80,830

Single storey extension - £51,592

Side return extension - £39,583

Install an RSJ - £2,030

Outbuilding - £9,830

Build a Mansard loft conversion - £51,830

Loft conversion - £32,153

Build a kitchen extension - £41,830

Hip to gable loft conversion - £41,830

Granny annexe - £86,830

Garden office - £9,830

Convert a Garage - £15,830

Garage - £18,330

Build a flat roof extension - £21,830

Build a dormer loft conversion - £41,830

Concrete foundations - £6,080

Convert a bungalow loft - £28,830

Convert a basement - £35,583