Edmond Begu
EB Construction & Building Ltd are here to help customers who need an Extension Builder in HP2. We offer a competitive rate to complete all your ex...
Dave Reilly
BOXMOOR BLDG & CARP SERVICES is a trusted extension builder serving customers in HP2 and the surrounding area. Contact us to today to get a competi...
BARRETT LESLIE BUILDING are here to help customers who need an Extension Builder in HP2. We offer a competitive rate to complete all your extension...
Simon Johnson
Simon Johnson & Sons Builders are here to help customers who need an Extension Builder in HP2. We offer a competitive rate to complete all your ext...
Need an Extension Builder in HP2? JCG BUILDING SERVICES LTD has been helping local clients (20 mile radius) with their extension buildering jobs fo...
From £87,040
Trevor
Trusted and professional extension builder in HP2. Experienced in all extension buildering work and keeping within budget and on quote. T Woodman L...
From £87,080
WHITE HART BUILDING LIMITED is a trusted extension builder serving customers in HP2 and the surrounding area. Contact us to today to get a competit...
From £87,440
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,112
Need to find an Extension Builder near you for all your extension buildering work?
AUBREY BUILDING SERVICES LTD provides a local, trusted e...
From £87,136
Experienced extension builder ready to quote for your work. Building & Renovation Services Zdzislaw Zalewski is the best extension builder in HP2. ...

Building a granny annexe ranges from £86,896 (Simon Johnson & Sons Builders based in HP2) to £87,440 (Evolved Glazing Solutions Limited based in HP3), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in HP2 by posting a job with HaMuch. We will send it to extension builders in HP2 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Hemel Hempstead | £42 | £270 |
| Granny Annexe near Dacorum | £42 | £269 |
| Granny Annexe near St Albans | £63 | £289 |
| Granny Annexe near Berkhamsted | £41 | £263 |
| Granny Annexe near Harpenden | £86 | £316 |
| Granny Annexe near Chesham | £42 | £277 |
| Granny Annexe near Luton | £41 | £278 |
| Granny Annexe near Rickmansworth | £42 | £278 |
| Granny Annexe near Watford | £43 | £278 |
| Granny Annexe near Dunstable | £41 | £272 |
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 - £17,603

Two storey extension - £88,155

Build a timber frame extension - £26,103

Build a swimming pool - £81,103

Single storey extension - £57,064

Side return extension - £42,661

Install an RSJ - £2,303

Outbuilding - £10,103

Build a Mansard loft conversion - £52,103

Loft conversion - £34,718

Build a kitchen extension - £42,103

Hip to gable loft conversion - £42,103

Granny annexe - £87,103

Garden office - £10,103

Convert a Garage - £16,103

Garage - £18,603

Build a flat roof extension - £22,103

Build a dormer loft conversion - £42,103

Concrete foundations - £6,353

Convert a bungalow loft - £29,103

Convert a basement - £38,661