From £88,540
Need an Extension Builder in HP1? MW The Building Specialists Ltd has been helping local clients (20 mile radius) with their extension buildering j...
From £88,120
BOXMOOR BLDG & CARP SERVICES is a trusted extension builder serving customers in HP1 and the surrounding area. Contact us to today to get a competi...
From £88,060
BARRETT LESLIE BUILDING are here to help customers who need an Extension Builder in HP1. We offer a competitive rate to complete all your extension...
From £87,916
Relax... you have found a reliable extension builder in HP1. Ellis Construction is a friendly and reliable company based in HP1 who consider no job...
From £85,156
Hertfordshire brickwork is the realisation of quality and great customer service at its very best i myself the director of Hertfordshire bric...
From £88,228
JH Refurbishments are here to help customers who need an Extension Builder in HP1. We offer a competitive rate to complete all your extension build...
From £88,336
Grand Developments and Construction Ltd are here to help customers who need an Extension Builder in HP1. We offer a competitive rate to complete al...
From £88,540
Relax... you have found a reliable extension builder in HP1. Alpha Home Improvements London Ltd is a friendly and reliable company based in HP1 who...
From £88,204
Experienced extension builder ready to quote for your work. Building & Renovation Services Zdzislaw Zalewski is the best extension builder in HP1. ...
From £87,844
Simon Johnson & Sons Builders are here to help customers who need an Extension Builder in HP1. We offer a competitive rate to complete all your ext...

Costs range from £85,156 (Hertfordshire brickwork based in Hp1) to £88,540 (MW The Building Specialists Ltd based in HP1), but these are just estimates. The best way to compare costs is to get real quotes from real builders.
Post your job on HaMuch and we'll send it to extension builders to HP1.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Two Storey Extension near Hemel Hempstead | £36 | £232 |
| Two Storey Extension near Dacorum | £36 | £232 |
| Two Storey Extension near Berkhamsted | £35 | £227 |
| Two Storey Extension near Chesham | £36 | £237 |
| Two Storey Extension near St Albans | £52 | £246 |
| Two Storey Extension near Harpenden | £70 | £264 |
| Two Storey Extension near Rickmansworth | £37 | £241 |
| Two Storey Extension near Watford | £37 | £239 |
| Two Storey Extension near Dunstable | £36 | £235 |
| Two Storey Extension near Luton | £37 | £240 |
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 - £17,430

Two storey extension - £87,894

Build a timber frame extension - £25,930

Build a swimming pool - £80,930

Single storey extension - £53,592

Side return extension - £40,708

Install an RSJ - £2,130

Outbuilding - £9,930

Build a Mansard loft conversion - £51,930

Loft conversion - £33,090

Build a kitchen extension - £41,930

Hip to gable loft conversion - £41,930

Granny annexe - £86,930

Garden office - £9,930

Convert a Garage - £15,930

Garage - £18,430

Build a flat roof extension - £21,930

Build a dormer loft conversion - £41,930

Concrete foundations - £6,180

Convert a bungalow loft - £28,930

Convert a basement - £36,708