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Experienced extension builder ready to quote for your work. Trad Roofing is the best extension builder in Alton. No obligation free quotes and many...
From £87,184
RP Superstructures was formed in 2011 by principals Gerry Budd and Pat Sheehan following the successful build of Gerry’s own house, using his mul...
From £87,080
Alton, GU34
Need an Extension Builder in Alton? A & J Roofing (Haslemere) Ltd has been helping local clients (20 mile radius) with their extension buildering j...
From £86,904
Vaughan Design and Development is an established extension buildering business in Alton. We come highly recommended and provide competitive quotes ...
From £87,104
Need to find an Extension Builder near you for all your extension buildering work?
360 CONSTRUCTION SURREY LTD provides a local, trusted ex...
From £87,832
John Shea
Experienced extension builder ready to quote for your work. CANADA BUILDERS & ROOFING LTD is the best extension builder in Alton. No obligation fre...
From £86,976
Relax... you have found a reliable extension builder in Alton. Design & Construction Support Ltd is a friendly and reliable company based in Alton ...
From £87,248
REPAIR CRAFT CONSTRUCTION is a trusted extension builder serving customers in Alton and the surrounding area. Contact us to today to get a competit...
From £87,200
Relax... you have found a reliable extension builder in Alton. RP Superstructures is a friendly and reliable company based in Alton who consider no...

Building a granny annexe ranges from £86,904 (Vaughan Design and Development based in gu32) to £87,832 (CANADA BUILDERS & ROOFING LTD based in GU35), 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 Alton by posting a job with HaMuch. We will send it to extension builders in Alton who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near East Hampshire | £38 | £258 |
| Granny Annexe near Basingstoke | £39 | £274 |
| Granny Annexe near Farnham | £41 | £276 |
| Granny Annexe near Fleet | £41 | £270 |
| Granny Annexe near Aldershot | £41 | £275 |
| Granny Annexe near Waverley | £68 | £313 |
| Granny Annexe near Basingstoke & Deane | £39 | £273 |
| Granny Annexe near Ash Vale | £41 | £277 |
| Granny Annexe near Farnborough | £41 | £272 |
| Granny Annexe near Winchester | £39 | £283 |
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 - £17,686

Two storey extension - £88,280

Build a timber frame extension - £26,186

Build a swimming pool - £81,186

Single storey extension - £58,728

Side return extension - £43,597

Install an RSJ - £2,386

Outbuilding - £10,186

Build a Mansard loft conversion - £52,186

Loft conversion - £35,498

Build a kitchen extension - £42,186

Hip to gable loft conversion - £42,186

Granny annexe - £87,186

Garden office - £10,186

Convert a Garage - £16,186

Garage - £18,686

Build a flat roof extension - £22,186

Build a dormer loft conversion - £42,186

Concrete foundations - £6,436

Convert a bungalow loft - £29,186

Convert a basement - £39,597