From £87,288
Pegasus Builders is an established extension buildering business in GU31. We come highly recommended and provide competitive quotes for your work.<...
From £86,712
Southdowns Builders Ltd is an established and experienced local extension builder in GU31. Please contact us for a free, no obligation quote and co...
From £86,912
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,320
Make your home the place where you really feel great. Where there’s room for family, for friends, for work, for play. Our design and construction...
From £86,912
Experienced extension builder ready to quote for your work. Hurstmore Services Ltd is the best extension builder in GU31. No obligation free quotes...
From £86,904
Vaughan Design and Development is an established extension buildering business in GU31. We come highly recommended and provide competitive quotes f...
From £87,336
T Bishop Construction is an established extension buildering business in GU31. We come highly recommended and provide competitive quotes for your w...
From £86,888
Trusted and professional extension builder in GU31. Experienced in all extension buildering work and keeping within budget and on quote. M Way Buil...
From £87,248
REPAIR CRAFT CONSTRUCTION is a trusted extension builder serving customers in GU31 and the surrounding area. Contact us to today to get a competiti...
From £86,976
Relax... you have found a reliable extension builder in GU31. Design & Construction Support Ltd is a friendly and reliable company based in GU31 wh...

Building a granny annexe ranges from £86,712 (Southdowns Builders Ltd based in GU31) to £87,336 (T Bishop Construction based in GU33), 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 GU31 by posting a job with HaMuch. We will send it to extension builders in GU31 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near East Hampshire | £38 | £258 |
| Granny Annexe near Horndean | £35 | £253 |
| Granny Annexe near Waterlooville | £36 | £250 |
| Granny Annexe near Havant | £35 | £249 |
| Granny Annexe near Havant & Waterloo | £35 | £248 |
| Granny Annexe near Chichester | £34 | £242 |
| Granny Annexe near Portsmouth | £36 | £250 |
| Granny Annexe near Waverley | £68 | £313 |
| Granny Annexe near Fareham | £35 | £250 |
| Granny Annexe near Farnham | £41 | £276 |
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 - £17,550

Two storey extension - £88,074

Build a timber frame extension - £26,050

Build a swimming pool - £81,050

Single storey extension - £55,992

Side return extension - £42,058

Install an RSJ - £2,250

Outbuilding - £10,050

Build a Mansard loft conversion - £52,050

Loft conversion - £34,215

Build a kitchen extension - £42,050

Hip to gable loft conversion - £42,050

Granny annexe - £87,050

Garden office - £10,050

Convert a Garage - £16,050

Garage - £18,550

Build a flat roof extension - £22,050

Build a dormer loft conversion - £42,050

Concrete foundations - £6,300

Convert a bungalow loft - £29,050

Convert a basement - £38,058