Marin Hughes General Builders is a trusted extension builder serving customers in SA10 and the surrounding area. Contact us to today to get a compe...
Trusted and professional extension builder in SA10. Experienced in all extension buildering work and keeping within budget and on quote. HALL & HAR...

Building a granny annexe ranges from £86,760 (Marin Hughes General Builders based in SA10) 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 SA10 by posting a job with HaMuch. We will send it to extension builders in SA10 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 Port Talbot | £31 | £227 |
| Granny Annexe near Swansea | £29 | £229 |
| Granny Annexe near Maesteg | £38 | £283 |
| Granny Annexe near Gorseinon | £29 | £228 |
| Granny Annexe near Pyle | £34 | £262 |
| Granny Annexe near Porthcawl | £33 | £252 |
| Granny Annexe near Aberdare | £32 | £212 |
| Granny Annexe near Llanelli | £29 | £231 |
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 - £17,368

Two storey extension - £87,802

Build a timber frame extension - £25,868

Build a swimming pool - £80,868

Single storey extension - £52,360

Side return extension - £40,015

Install an RSJ - £2,068

Outbuilding - £9,868

Build a Mansard loft conversion - £51,868

Loft conversion - £32,513

Build a kitchen extension - £41,868

Hip to gable loft conversion - £41,868

Granny annexe - £86,868

Garden office - £9,868

Convert a Garage - £15,868

Garage - £18,368

Build a flat roof extension - £21,868

Build a dormer loft conversion - £41,868

Concrete foundations - £6,118

Convert a bungalow loft - £28,868

Convert a basement - £36,015