From £86,456
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,096
MJ solutions is an established and experienced local extension builder in Thamesdown. Please contact us for a free, no obligation quote and compet...
From £86,680
Trusted and professional extension builder in Thamesdown. Experienced in all extension buildering work and keeping within budget and on quote. G R ...
From £86,864
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £86,760
Dacol Services is Swindons number 1 property maintenance service.
Trusted by many letting agents, landlords, homeowners, and hoteliers.
From £87,240
Experienced extension builder ready to quote for your work. Biocraft South West Ltd is the best extension builder in Thamesdown. No obligation free...
From £86,824
R & R BUILDERS is an established and experienced local extension builder in Thamesdown. Please contact us for a free, no obligation quote and compe...
From £86,728
SWIFT DESIGN & BUILD LTD are here to help customers who need an Extension Builder in Thamesdown. We offer a competitive rate to complete all your e...
From £87,152
Prestige Build Services LTD is a trusted extension builder serving customers in Thamesdown and the surrounding area. Contact us to today to get a c...
From £86,920
Complete Driveway Solutions is an established and experienced local extension builder in Thamesdown. Please contact us for a free, no obligation qu...

Building a granny annexe ranges from £86,456 (Watts Builders based in SN25) to £87,240 (Biocraft South West Ltd based in SN5), 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 Thamesdown by posting a job with HaMuch. We will send it to extension builders in Thamesdown who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Thamesdown | £38 | £239 |
| Granny Annexe near Stratton St Margaret | £37 | £238 |
| Granny Annexe near Swindon | £38 | £238 |
| Granny Annexe near Calne | £29 | £225 |
| Granny Annexe near Vale of White Horse | £36 | £271 |
| Granny Annexe near Witney | £32 | £244 |
| Granny Annexe near Chippenham | £34 | £258 |
| Granny Annexe near North Wiltshire | £32 | £242 |
| Granny Annexe near West Wiltshire | £32 | £242 |
| Granny Annexe near Devizes | £32 | £242 |
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 - £17,372

Two storey extension - £87,808

Build a timber frame extension - £25,872

Build a swimming pool - £80,872

Single storey extension - £52,440

Side return extension - £40,060

Install an RSJ - £2,072

Outbuilding - £9,872

Build a Mansard loft conversion - £51,872

Loft conversion - £32,550

Build a kitchen extension - £41,872

Hip to gable loft conversion - £41,872

Granny annexe - £86,872

Garden office - £9,872

Convert a Garage - £15,872

Garage - £18,372

Build a flat roof extension - £21,872

Build a dormer loft conversion - £41,872

Concrete foundations - £6,122

Convert a bungalow loft - £28,872

Convert a basement - £36,060