From £86,976
Trusted and professional extension builder in SA11. Experienced in all extension buildering work and keeping within budget and on quote. HALL & HAR...
From £86,760
Marin Hughes General Builders is a trusted extension builder serving customers in SA11 and the surrounding area. Contact us to today to get a compe...
From £86,832
Need an Extension Builder in SA11? K.D.L Property Maintenance has been helping local clients (20 mile radius) with their extension buildering jobs ...
From £86,848
SS BUILDER are here to help customers who need an Extension Builder in SA11. We offer a competitive rate to complete all your extension buildering ...
From £86,720
G Wager Building Maintenance is a trusted extension builder serving customers in SA11 and the surrounding area. Contact us to today to get a compet...
From £86,936
A Room at the Top are here to help customers who need an Extension Builder in SA11. We offer a competitive rate to complete all your extension buil...
From £86,952
Trusted and professional extension builder in SA11. Experienced in all extension buildering work and keeping within budget and on quote. Complete B...
From £86,552
Need an Extension Builder in SA11? Calon Construction Ltd has been helping local clients (20 mile radius) with their extension buildering jobs for ...
From £86,632
Karina Lane Construction Ltd are here to help customers who need an Extension Builder in SA11. We offer a competitive rate to complete all your ext...
From £86,824
Evans Home Improvements are here to help customers who need an Extension Builder in SA11. We offer a competitive rate to complete all your extensio...

Building a granny annexe ranges from £86,552 (Calon Construction Ltd based in SA7) to £86,976 (HALL & HARRIS CONSTRUCTION based in SA11), 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 SA11 by posting a job with HaMuch. We will send it to extension builders in SA11 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Neath Port Talbot | £31 | £224 |
| Granny Annexe near Neath | £30 | £225 |
| Granny Annexe near Port Talbot | £31 | £227 |
| Granny Annexe near Maesteg | £38 | £283 |
| Granny Annexe near Swansea | £29 | £230 |
| Granny Annexe near Pyle | £34 | £262 |
| Granny Annexe near Gorseinon | £29 | £228 |
| Granny Annexe near Aberdare | £32 | £212 |
| Granny Annexe near Porthcawl | £33 | £252 |
| Granny Annexe near Bridgend | £32 | £200 |
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 - £17,303

Two storey extension - £87,705

Build a timber frame extension - £25,803

Build a swimming pool - £80,803

Single storey extension - £51,064

Side return extension - £39,286

Install an RSJ - £2,003

Outbuilding - £9,803

Build a Mansard loft conversion - £51,803

Loft conversion - £31,905

Build a kitchen extension - £41,803

Hip to gable loft conversion - £41,803

Granny annexe - £86,803

Garden office - £9,803

Convert a Garage - £15,803

Garage - £18,303

Build a flat roof extension - £21,803

Build a dormer loft conversion - £41,803

Concrete foundations - £6,053

Convert a bungalow loft - £28,803

Convert a basement - £35,286