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Trowel On is an established extension buildering business in SO40. We come highly recommended and provide competitive quotes for your work.
From £36,690
GDS Building & Maintenance Ltd is an established and experienced local extension builder in SO40. Please contact us for a free, no obligation quote...
From £36,690
Relax... you have found a reliable extension builder in SO40. 1st Oak Building Preservation & Maintenance is a friendly and reliable company based ...
From £38,760
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £36,420
Our building services company KT Carpentry & Building Services has been helping customers in Southampton, Winchester, Brockenhurst and Portsmouth b...

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 SO40 by posting a job with HaMuch and we will send it to extension builders in SO40.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Convert A Basement near Totton | £34 | £243 |
| Convert A Basement near Southampton | £34 | £243 |
| Convert A Basement near Romsey | £32 | £230 |
| Convert A Basement near New Forest | £32 | £245 |
| Convert A Basement near Eastleigh | £34 | £244 |
| Convert A Basement near Chandler's Ford | £34 | £245 |
| Convert A Basement near Hedge End | £34 | £244 |
| Convert A Basement near Locks Heath | £33 | £240 |
| Convert A Basement near Winchester | £39 | £283 |
| Convert A Basement near Fareham | £35 | £250 |
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 - £17,446

Two storey extension - £87,918

Build a timber frame extension - £25,946

Build a swimming pool - £80,946

Single storey extension - £53,912

Side return extension - £40,888

Install an RSJ - £2,146

Outbuilding - £9,946

Build a Mansard loft conversion - £51,946

Loft conversion - £33,240

Build a kitchen extension - £41,946

Hip to gable loft conversion - £41,946

Granny annexe - £86,946

Garden office - £9,946

Convert a Garage - £15,946

Garage - £18,446

Build a flat roof extension - £21,946

Build a dormer loft conversion - £41,946

Concrete foundations - £6,196

Convert a bungalow loft - £28,946

Convert a basement - £36,888