From £87,288
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £86,920
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
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 £86,680
Trusted and professional extension builder in SN6. Experienced in all extension buildering work and keeping within budget and on quote. G R & Son h...
From £86,760
Dacol Services is Swindons number 1 property maintenance service.
Trusted by many letting agents, landlords, homeowners, and hoteliers.
From £87,144
BROWNS TOTAL DESIGN & BUILD LTD is an established and experienced local extension builder in SN6. Please contact us for a free, no obligation quote...
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 SN6. Please contact us for a free, no obligation quote and competitive r...
From £87,072
We have a skilled and dedicated team of professional tradesmen to carry out all your requirements. Whether you are looking to build, extend or upgr...
From £86,744
Relax... you have found a reliable extension builder in SN6. Highworth Felt Roofing Limited is a friendly and reliable company based in SN6 who con...

Building a granny annexe ranges from £86,456 (Watts Builders based in SN25) to £87,288 (Austen Dawson (UK) Ltd based in SN6), 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 SN6 by posting a job with HaMuch. We will send it to extension builders in SN6 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Stratton St Margaret | £37 | £238 |
| Granny Annexe near Thamesdown | £38 | £239 |
| Granny Annexe near Swindon | £38 | £238 |
| Granny Annexe near Vale of White Horse | £36 | £271 |
| Granny Annexe near Witney | £32 | £244 |
| Granny Annexe near Calne | £29 | £225 |
| Granny Annexe near Abingdon-on-Thames | £35 | £258 |
| Granny Annexe near Didcot | £36 | £266 |
| Granny Annexe near North Wiltshire | £32 | £242 |
| Granny Annexe near West Wiltshire | £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 - £17,402

Two storey extension - £87,854

Build a timber frame extension - £25,902

Build a swimming pool - £80,902

Single storey extension - £53,048

Side return extension - £40,402

Install an RSJ - £2,102

Outbuilding - £9,902

Build a Mansard loft conversion - £51,902

Loft conversion - £32,835

Build a kitchen extension - £41,902

Hip to gable loft conversion - £41,902

Granny annexe - £86,902

Garden office - £9,902

Convert a Garage - £15,902

Garage - £18,402

Build a flat roof extension - £21,902

Build a dormer loft conversion - £41,902

Concrete foundations - £6,152

Convert a bungalow loft - £28,902

Convert a basement - £36,402