Peter Rourke
Trusted and professional extension builder in AL5. Experienced in all extension buildering work and keeping within budget and on quote. Peter's Gut...
Are you looking for resin driveways in North London? We are a leading builder of driveways and patios in North London. We have expertise in various...
From £87,976
Nicholas Bilyk
Abalon is Western Canada’s leading foundation repair and basement waterproofing company, operating in the Edmonton area for over 40 years (50 yea...
From £88,600
Bob Gordon
Bob's Home Maintenance are here to help customers who need an Extension Builder in AL5. We offer a competitive rate to complete all your extension ...
From £88,408
Bernard Priolo
Experienced extension builder ready to quote for your work. Priolotiling is the best extension builder in AL5. No obligation free quotes and many h...
From £88,852
Experienced extension builder ready to quote for your work. Ashtons is the best extension builder in AL5. No obligation free quotes and many happy ...
From £88,468
Trusted and professional extension builder in AL5. Experienced in all extension buildering work and keeping within budget and on quote. Home By Sim...
From £88,168
4siblings are here to help customers who need an Extension Builder in AL5. We offer a competitive rate to complete all your extension buildering jo...
From £88,096
We pride ourselves in offering transparent, collaborative construction services, defining your project, through planning and taking your project t...
From £88,792
Billy Homan set up Grain Property to provide high-quality design, seamless project delivery, and a commitment to excellent communication throughout...

Costs range from £87,976 (Abalon Construction based in ZZ99) to £88,852 (Ashtons based in Al5), 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 Harpenden | £87 | £317 |
| Two Storey Extension near St Albans | £63 | £289 |
| Two Storey Extension near Luton | £42 | £279 |
| Two Storey Extension near Hatfield | £65 | £285 |
| Two Storey Extension near Hemel Hempstead | £42 | £270 |
| Two Storey Extension near Welwyn Garden City | £42 | £269 |
| Two Storey Extension near Dacorum | £42 | £269 |
| Two Storey Extension near Hitchin | £43 | £283 |
| Two Storey Extension near Dunstable | £41 | £274 |
| Two Storey Extension near Stevenage | £44 | £282 |
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 - £17,812

Two storey extension - £88,468

Build a timber frame extension - £26,312

Build a swimming pool - £81,312

Single storey extension - £61,240

Side return extension - £45,010

Install an RSJ - £2,512

Outbuilding - £10,312

Build a Mansard loft conversion - £52,312

Loft conversion - £36,675

Build a kitchen extension - £42,312

Hip to gable loft conversion - £42,312

Granny annexe - £87,312

Garden office - £10,312

Convert a Garage - £16,312

Garage - £18,812

Build a flat roof extension - £22,312

Build a dormer loft conversion - £42,312

Concrete foundations - £6,562

Convert a bungalow loft - £29,312

Convert a basement - £41,010