From £86,848
SS BUILDER are here to help customers who need an Extension Builder in Baglan. We offer a competitive rate to complete all your extension builderin...
From £86,832
Need an Extension Builder in Baglan? K.D.L Property Maintenance has been helping local clients (20 mile radius) with their extension buildering job...
From £86,976
Trusted and professional extension builder in Baglan. Experienced in all extension buildering work and keeping within budget and on quote. HALL & H...
From £86,760
Marin Hughes General Builders is a trusted extension builder serving customers in Baglan and the surrounding area. Contact us to today to get a com...
From £86,952
Trusted and professional extension builder in Baglan. Experienced in all extension buildering work and keeping within budget and on quote. Complete...
From £86,936
A Room at the Top are here to help customers who need an Extension Builder in Baglan. We offer a competitive rate to complete all your extension bu...
From £86,632
Karina Lane Construction Ltd are here to help customers who need an Extension Builder in Baglan. We offer a competitive rate to complete all your e...
From £87,000
R.H Damp Proofing are here to help customers who need an Extension Builder in Baglan. We offer a competitive rate to complete all your extension bu...
From £86,896
Fit kitchens and more ltd is an established and experienced local extension builder in Baglan. Please contact us for a free, no obligation quote an...
From £86,552
Need an Extension Builder in Baglan? Calon Construction Ltd has been helping local clients (20 mile radius) with their extension buildering jobs fo...

Building a granny annexe ranges from £86,552 (Calon Construction Ltd based in SA7) to £87,000 (R.H Damp Proofing based in SA1), 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 Baglan by posting a job with HaMuch. We will send it to extension builders in Baglan who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Port Talbot | £31 | £227 |
| Granny Annexe near Neath | £30 | £225 |
| Granny Annexe near Maesteg | £38 | £283 |
| Granny Annexe near Neath Port Talbot | £31 | £224 |
| Granny Annexe near Swansea | £29 | £230 |
| Granny Annexe near Pyle | £34 | £262 |
| Granny Annexe near Porthcawl | £33 | £252 |
| Granny Annexe near Bridgend | £32 | £200 |
| Granny Annexe near Gorseinon | £29 | £228 |
| Granny Annexe near Rhondda | £31 | £206 |
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 - £17,338

Two storey extension - £87,758

Build a timber frame extension - £25,838

Build a swimming pool - £80,838

Single storey extension - £51,768

Side return extension - £39,682

Install an RSJ - £2,038

Outbuilding - £9,838

Build a Mansard loft conversion - £51,838

Loft conversion - £32,235

Build a kitchen extension - £41,838

Hip to gable loft conversion - £41,838

Granny annexe - £86,838

Garden office - £9,838

Convert a Garage - £15,838

Garage - £18,338

Build a flat roof extension - £21,838

Build a dormer loft conversion - £41,838

Concrete foundations - £6,088

Convert a bungalow loft - £28,838

Convert a basement - £35,682