From £9,712
Need to find an Extension Builder near you for all your extension buildering work?
R And S Building provides a local, trusted extension bui...
From £10,184
Relax... you have found a reliable extension builder in PO11. ROWLANDS CONSTRUCTION is a friendly and reliable company based in PO11 who consider n...
From £10,080
Devscapes is an established extension buildering business in PO11. We come highly recommended and provide competitive quotes for your work.
From £9,976
Experienced extension builder ready to quote for your work. Portsmouth Building Repairs is the best extension builder in PO11. No obligation free q...
From £10,000
Experienced extension builder ready to quote for your work. Pompey Homes Ltd is the best extension builder in PO11. No obligation free quotes and m...
From £9,920
Need an Extension Builder in PO11? Aspen Garden Rooms has been helping local clients (20 mile radius) with their extension buildering jobs for many...
From £9,712
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £9,984
Sigma Probuild Ltd is an established extension buildering business in PO11. We come highly recommended and provide competitive quotes for your work...
From £10,112
Solent Home Improvements are here to help customers who need an Extension Builder in PO11. We offer a competitive rate to complete all your extensi...
From £9,968
Solent Home Improvements are here to help customers who need an Extension Builder in PO11. We offer a competitive rate to complete all your extensi...

Outbuilding costs in PO11 range from the cheapest of £9,712 (R And S Building based in PO11) to the dearest of £10,184 (ROWLANDS CONSTRUCTION based in PO11), but these are just estimates.
Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build an outbuilding in PO11 by posting a job with HaMuch and we will send it to extension builders.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Outbuilding near Havant & Waterloo | £35 | £245 |
| Outbuilding near Havant | £34 | £245 |
| Outbuilding near Portsmouth | £36 | £248 |
| Outbuilding near Waterlooville | £35 | £246 |
| Outbuilding near Gosport | £35 | £246 |
| Outbuilding near Horndean | £35 | £248 |
| Outbuilding near Chichester | £34 | £242 |
| Outbuilding near Lee-on-the-Solent | £35 | £249 |
| Outbuilding near Fareham | £35 | £250 |
| Outbuilding near Bognor Regis | £35 | £247 |
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 - £17,465

Two storey extension - £87,947

Build a timber frame extension - £25,965

Build a swimming pool - £80,965

Single storey extension - £54,296

Side return extension - £41,104

Install an RSJ - £2,165

Outbuilding - £9,965

Build a Mansard loft conversion - £51,965

Loft conversion - £33,420

Build a kitchen extension - £41,965

Hip to gable loft conversion - £41,965

Granny annexe - £86,965

Garden office - £9,965

Convert a Garage - £15,965

Garage - £18,465

Build a flat roof extension - £21,965

Build a dormer loft conversion - £41,965

Concrete foundations - £6,215

Convert a bungalow loft - £28,965

Convert a basement - £37,104