From £86,944
H VAUGHAN BUILDERS is an established extension buildering business in Monmouthshire. We come highly recommended and provide competitive quotes for ...
From £86,744
OWEN BROTHERS CONSTRUCTION LTD are here to help customers who need an Extension Builder in Monmouthshire. We offer a competitive rate to complete a...
From £86,568
D BENDON CONSTRUCTION LTD is an established and experienced local extension builder in Monmouthshire. Please contact us for a free, no obligation q...
From £86,984
Need to find an Extension Builder near you for all your extension buildering work?
PARTRIDGE - WILSON BUILDERS provides a local, trusted ex...
From £86,768
Our building services company JSP Carpentry & Building Services has 15 years of experience in the industry. Since then, we have been helping custom...
From £86,608
Relax... you have found a reliable extension builder in Monmouthshire. HEDLYN BUILDING CONTRACTORS is a friendly and reliable company based in Mon...
From £86,816
Eric J Ivins is a trusted extension builder serving customers in Monmouthshire and the surrounding area. Contact us to today to get a competitive q...
From £86,560
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £86,824
LEE BAILEY BUILDING SERVICES are here to help customers who need an Extension Builder in Monmouthshire. We offer a competitive rate to complete all...
From £86,864
, NP44
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 £86,560 (Pearwood Projects Ltd based in NP44) to £86,984 (PARTRIDGE - WILSON BUILDERS based in NP44), 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 Monmouthshire by posting a job with HaMuch. We will send it to extension builders in Monmouthshire who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Pontypool | £30 | £210 |
| Granny Annexe near Cwmbran | £43 | £219 |
| Granny Annexe near Newport | £41 | £233 |
| Granny Annexe near Risca | £32 | £218 |
| Granny Annexe near Ebbw Vale | £30 | £217 |
| Granny Annexe near Tredegar | £30 | £217 |
| Granny Annexe near Caerphilly | £33 | £208 |
| Granny Annexe near Portishead | £33 | £247 |
| Granny Annexe near Bradley Stoke | £34 | £259 |
| Granny Annexe near Clevedon | £32 | £243 |
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 - £17,268

Two storey extension - £87,652

Build a timber frame extension - £25,768

Build a swimming pool - £80,768

Single storey extension - £50,360

Side return extension - £38,890

Install an RSJ - £1,968

Outbuilding - £9,768

Build a Mansard loft conversion - £51,768

Loft conversion - £31,575

Build a kitchen extension - £41,768

Hip to gable loft conversion - £41,768

Granny annexe - £86,768

Garden office - £9,768

Convert a Garage - £15,768

Garage - £18,268

Build a flat roof extension - £21,768

Build a dormer loft conversion - £41,768

Concrete foundations - £6,018

Convert a bungalow loft - £28,768

Convert a basement - £34,890