DEREK REES BUILDING MAINTENANC is an established extension buildering business in LD3. We come highly recommended and provide competitive quotes fo...
From £86,744
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Building a granny annexe ranges from £86,640 (DEREK REES BUILDING MAINTENANC based in LD3) to £86,744 (SEER CONSTRUCTION LTD based in LD3), 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 LD3 by posting a job with HaMuch. We will send it to extension builders in LD3 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Tredegar | £30 | £217 |
| Granny Annexe near Ebbw Vale | £30 | £217 |
| Granny Annexe near Merthyr Tydfil | £33 | £220 |
| Granny Annexe near Aberdare | £32 | £212 |
| Granny Annexe near Rhondda, Cynon, Taff | £31 | £209 |
| Granny Annexe near Pontypool | £30 | £210 |
| Granny Annexe near Rhondda | £31 | £206 |
| Granny Annexe near Neath Port Talbot | £31 | £224 |
| Granny Annexe near Pontypridd | £33 | £211 |
| Granny Annexe near Cwmbran | £43 | £219 |
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 - £17,192

Two storey extension - £87,538

Build a timber frame extension - £25,692

Build a swimming pool - £80,692

Single storey extension - £48,840

Side return extension - £38,035

Install an RSJ - £1,892

Outbuilding - £9,692

Build a Mansard loft conversion - £51,692

Loft conversion - £30,863

Build a kitchen extension - £41,692

Hip to gable loft conversion - £41,692

Granny annexe - £86,692

Garden office - £9,692

Convert a Garage - £15,692

Garage - £18,192

Build a flat roof extension - £21,692

Build a dormer loft conversion - £41,692

Concrete foundations - £5,942

Convert a bungalow loft - £28,692

Convert a basement - £34,035