From £86,936
Plumbing, painting exterior, interior, extensions, plastering, skiming, carpeting, Flooring, you can ask us ..
From £88,584
Propello is an established and experienced local extension builder in AL10. Please contact us for a free, no obligation quote and competitive rate...
From £86,456
we are very efficient in our work.and make sure our client is one 100% satisfied with our work.
From £87,456
A.J Builders is an established and experienced local extension builder in AL10. Please contact us for a free, no obligation quote and competitive r...
From £87,272
Top Notch Tradesmen is an established and experienced local extension builder in AL10. Please contact us for a free, no obligation quote and compet...
From £87,016
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,344
Need to find an Extension Builder near you for all your extension buildering work?
Greg-Bud provides a local, trusted extension buildering ...
From £87,432
Krystian Wojasiewicz is a trusted extension builder serving customers in AL10 and the surrounding area. Contact us to today to get a competitive qu...
From £87,432
Platinum Electrics is a Branch off Platinum Premier Projects who deal in all types of construction projects. Platinum Electrics are based in London...
From £87,112
JJSR Construction Ltd is an established and experienced local extension builder in AL10. Please contact us for a free, no obligation quote and comp...

Building a granny annexe ranges from £86,456 (Rite Builders based in LU1) to £88,584 (Propello based in E17), 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 AL10 by posting a job with HaMuch. We will send it to extension builders in AL10 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Hatfield | £64 | £283 |
| Granny Annexe near Welwyn Garden City | £42 | £268 |
| Granny Annexe near Potters Bar | £43 | £273 |
| Granny Annexe near St Albans | £63 | £288 |
| Granny Annexe near Harpenden | £86 | £315 |
| Granny Annexe near Hertford | £46 | £289 |
| Granny Annexe near Borehamwood | £42 | £270 |
| Granny Annexe near High Barnet | £43 | £272 |
| Granny Annexe near Cheshunt | £48 | £285 |
| Granny Annexe near Hoddesdon | £46 | £296 |
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 - £17,804

Two storey extension - £88,456

Build a timber frame extension - £26,304

Build a swimming pool - £81,304

Single storey extension - £61,080

Side return extension - £44,920

Install an RSJ - £2,504

Outbuilding - £10,304

Build a Mansard loft conversion - £52,304

Loft conversion - £36,600

Build a kitchen extension - £42,304

Hip to gable loft conversion - £42,304

Granny annexe - £87,304

Garden office - £10,304

Convert a Garage - £16,304

Garage - £18,804

Build a flat roof extension - £22,304

Build a dormer loft conversion - £42,304

Concrete foundations - £6,554

Convert a bungalow loft - £29,304

Convert a basement - £40,920