From £35,700
Building services with over 10 years experience all work completed to the highest standard call for a quote.
From £39,480
JKS Property is an established and experienced local extension builder in PO1. Please contact us for a free, no obligation quote and competitive ra...
From £36,600
Relax... you have found a reliable extension builder in PO1. IndieGo Build is a friendly and reliable company based in PO1 who consider no job as t...
From £37,410
BUILD PROJECT LIMITED are here to help customers who need an Extension Builder in PO1. We offer a competitive rate to complete all your extension b...
From £36,330
Abacus Building Services is an established and experienced local extension builder in PO1. Please contact us for a free, no obligation quote and co...
From £37,680
Need an Extension Builder in PO1? Buildtech southern Ltd has been helping local clients (20 mile radius) with their extension buildering jobs for m...
From £37,590
ARCHIBUILD design, build and deliver exciting design driven projects for clients who share our passion for spaces and places that benefit people.We...
From £37,500
Experienced extension builder ready to quote for your work. Pompey Homes Ltd is the best extension builder in PO1. No obligation free quotes and ma...
From £37,140
Experienced extension builder ready to quote for your work. Shepperd Developments is the best extension builder in PO1. No obligation free quotes a...
From £35,430
Architectural services, Design of office ,hotel, transport building,Residential .From Conceptual work to Appication.

Comparing extension builders estimates for a Convert a basement gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for the cost to convert a basement in PO1 by posting a job with HaMuch and we will send it to extension builders in PO1.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Convert A Basement near Portsmouth | £36 | £248 |
| Convert A Basement near Gosport | £35 | £246 |
| Convert A Basement near Lee-on-the-Solent | £35 | £249 |
| Convert A Basement near Fareham | £35 | £250 |
| Convert A Basement near Havant & Waterloo | £35 | £245 |
| Convert A Basement near Havant | £34 | £245 |
| Convert A Basement near Waterlooville | £35 | £246 |
| Convert A Basement near Horndean | £35 | £248 |
| Convert A Basement near Locks Heath | £33 | £240 |
| Convert A Basement near Isle of Wight | £34 | £246 |
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 - £17,463

Two storey extension - £87,945

Build a timber frame extension - £25,963

Build a swimming pool - £80,963

Single storey extension - £54,264

Side return extension - £41,086

Install an RSJ - £2,163

Outbuilding - £9,963

Build a Mansard loft conversion - £51,963

Loft conversion - £33,405

Build a kitchen extension - £41,963

Hip to gable loft conversion - £41,963

Granny annexe - £86,963

Garden office - £9,963

Convert a Garage - £15,963

Garage - £18,463

Build a flat roof extension - £21,963

Build a dormer loft conversion - £41,963

Concrete foundations - £6,213

Convert a bungalow loft - £28,963

Convert a basement - £37,086