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Relax... you have found a reliable extension builder in Garw Valley. Cwtch Property Developments is a friendly and reliable company based in Garw V...
Mathew Rees
Silicone Render System Ltd is a plastering company based in Porthcawl, with over 20 years’ experience in the plastering trade. W...
Trusted and professional extension builder in Garw Valley. Experienced in all extension buildering work and keeping within budget and on quote. Com...
We are a small family run business, established over 35 years ago, specialising in Hard Landscaping (Patios) and Block Paving.We a...
Experienced extension builder ready to quote for your work. WH Builders is the best extension builder in Garw Valley. No obligation free quotes and...
S J S Services (Wales) Ltd is a trusted extension builder serving customers in Garw Valley and the surrounding area. Contact us to today to get a c...
Need an Extension Builder in Garw Valley? SP Property Maintenance has been helping local clients (20 mile radius) with their extension buildering j...
From £86,800
Scorpion Windows LTD is a trusted extension builder serving customers in Garw Valley and the surrounding area. Contact us to today to get a competi...
From £86,616
Excel Home Design Ltd is an established extension buildering business in Garw Valley. We come highly recommended and provide competitive quotes for...

Building a granny annexe ranges from £86,576 (Cwtch Property Developments based in CF34) to £89,080 (Silicone Rendering Systems Ltd based in CF36), 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 Garw Valley by posting a job with HaMuch. We will send it to extension builders in Garw Valley who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Bridgend | £32 | £200 |
| Granny Annexe near Maesteg | £38 | £283 |
| Granny Annexe near Pyle | £34 | £262 |
| Granny Annexe near Porthcawl | £33 | £252 |
| Granny Annexe near Rhondda | £31 | £206 |
| Granny Annexe near Port Talbot | £31 | £227 |
| Granny Annexe near Rhondda, Cynon, Taff | £31 | £209 |
| Granny Annexe near Pontypridd | £33 | £211 |
| Granny Annexe near Neath Port Talbot | £31 | £224 |
| Granny Annexe near Vale of Glamorgan | £29 | £217 |
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 - £17,533

Two storey extension - £88,049

Build a timber frame extension - £26,033

Build a swimming pool - £81,033

Single storey extension - £55,658

Side return extension - £41,870

Install an RSJ - £2,233

Outbuilding - £10,033

Build a Mansard loft conversion - £52,033

Loft conversion - £34,058

Build a kitchen extension - £42,033

Hip to gable loft conversion - £42,033

Granny annexe - £87,033

Garden office - £10,033

Convert a Garage - £16,033

Garage - £18,533

Build a flat roof extension - £22,033

Build a dormer loft conversion - £42,033

Concrete foundations - £6,283

Convert a bungalow loft - £29,033

Convert a basement - £37,870