From £36,870
Ross Taylor Homes is an established extension buildering business in SG3. We come highly recommended and provide competitive quotes for your work.<...
From £37,050
Relax... you have found a reliable extension builder in SG3. Interior Installations is a friendly and reliable company based in SG3 who consider no...
From £36,600
Need an Extension Builder in SG3? MA Gower has been helping local clients (20 mile radius) with their extension buildering jobs for many years. Get...
From £42,090
Laurdan Building LTD is an established and experienced local extension builder in SG3. Please contact us for a free, no obligation quote and compet...
From £39,660
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...
From £38,580
Relax... you have found a reliable extension builder in SG3. GB Build is a friendly and reliable company based in SG3 who consider no job as too bi...
From £29,850
Complex Construction is an established extension buildering business in SG3. We come highly recommended and provide competitive quotes for your wor...
From £41,550
We are a family run business with over 30 years of combined experience, we offer everything from replacing doors and worktops on your kitchen to sm...
From £40,560
Harris Building Solutions Limited is an established extension buildering business in SG3. We come highly recommended and provide competitive quotes...
From £42,000
J&R Property is an established and experienced local extension builder in SG3. Please contact us for a free, no obligation quote and competitive ra...

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 SG3 by posting a job with HaMuch and we will send it to extension builders in SG3.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Convert A Basement near Stevenage | £37 | £239 |
| Convert A Basement near Welwyn Garden City | £36 | £229 |
| Convert A Basement near Hertford | £39 | £247 |
| Convert A Basement near Hitchin | £37 | £238 |
| Convert A Basement near East Hertfordshire | £37 | £241 |
| Convert A Basement near North Hertfordshire | £37 | £239 |
| Convert A Basement near Hatfield | £53 | £244 |
| Convert A Basement near Ware | £40 | £252 |
| Convert A Basement near Harpenden | £70 | £264 |
| Convert A Basement near Letchworth | £37 | £239 |
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 - £17,587

Two storey extension - £88,131

Build a timber frame extension - £26,087

Build a swimming pool - £81,087

Single storey extension - £56,744

Side return extension - £42,481

Install an RSJ - £2,287

Outbuilding - £10,087

Build a Mansard loft conversion - £52,087

Loft conversion - £34,568

Build a kitchen extension - £42,087

Hip to gable loft conversion - £42,087

Granny annexe - £87,087

Garden office - £10,087

Convert a Garage - £16,087

Garage - £18,587

Build a flat roof extension - £22,087

Build a dormer loft conversion - £42,087

Concrete foundations - £6,337

Convert a bungalow loft - £29,087

Convert a basement - £38,481