From £87,916
Ross Taylor Homes is an established extension buildering business in SG3. We come highly recommended and provide competitive quotes for your work.<...
From £87,940
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 £87,880
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 £88,612
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 £88,288
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 £88,144
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 £86,980
Complex Construction is an established extension buildering business in SG3. We come highly recommended and provide competitive quotes for your wor...
From £88,540
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 £88,408
Harris Building Solutions Limited is an established extension buildering business in SG3. We come highly recommended and provide competitive quotes...
From £88,600
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...

Costs range from £86,980 (Complex Construction based in AL7) to £88,612 (Laurdan Building LTD based in AL6), but these are just estimates. The best way to compare costs is to get real quotes from real builders.
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| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Two Storey Extension near Stevenage | £37 | £239 |
| Two Storey Extension near Welwyn Garden City | £36 | £229 |
| Two Storey Extension near Hertford | £39 | £247 |
| Two Storey Extension near Hitchin | £37 | £238 |
| Two Storey Extension near East Hertfordshire | £37 | £241 |
| Two Storey Extension near North Hertfordshire | £37 | £239 |
| Two Storey Extension near Hatfield | £53 | £244 |
| Two Storey Extension near Ware | £40 | £252 |
| Two Storey Extension near Harpenden | £70 | £264 |
| Two Storey Extension 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