From £88,272
At PDS we have a very simple business model. We operate 24 hours a day 365 days a year, so our clients and customers have peace of mind, that wheth...
From £87,200
Broxbourne, EN10
Need an Extension Builder in Broxbourne? MG BUILDERS has been helping local clients (10 mile radius) with their extension buildering jobs for many ...
From £87,056
Experienced extension builder ready to quote for your work. BLERIOT CONSTRUCTION LTD is the best extension builder in Broxbourne. No obligation fre...
From £87,152
Need an Extension Builder in Broxbourne? M J S BUILDERS T/A has been helping local clients (10 mile radius) with their extension buildering jobs fo...
From £87,408
Jon Howard Construction Ltd is a trusted extension builder serving customers in Broxbourne and the surrounding area. Contact us to today to get a c...
From £87,328
Jarman Tew Design Ltd is an established and experienced local extension builder in Broxbourne. Please contact us for a free, no obligation quote an...
From £88,392
Experienced extension builder ready to quote for your work. Atlas Facilities Services Limited is the best extension builder in Broxbourne. No oblig...
From £87,224
Need an Extension Builder in Broxbourne? TJJ Construction Ltd has been helping local clients (10 mile radius) with their extension buildering jobs ...
From £87,128
Expanse Partnership is an established and experienced local extension builder in Broxbourne. Please contact us for a free, no obligation quote and ...
From £87,368
Need to find an Extension Builder near you for all your extension buildering work?
C.B.Buildings & Claims Limited T/A Concept Solutions 3 C...

Building a granny annexe ranges from £87,056 (BLERIOT CONSTRUCTION LTD based in EN10) to £88,392 (Atlas Facilities Services Limited based in EN11), 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 Broxbourne by posting a job with HaMuch. We will send it to extension builders in Broxbourne who will be happy to help you.
"Granny annexe" - EN3, job posted 03/08/25
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Hoddesdon | £46 | £296 |
| Granny Annexe near Cheshunt | £48 | £285 |
| Granny Annexe near Ware | £47 | £296 |
| Granny Annexe near Hertford | £46 | £289 |
| Granny Annexe near Epping Forest | £44 | £273 |
| Granny Annexe near Potters Bar | £43 | £273 |
| Granny Annexe near Loughton | £44 | £273 |
| Granny Annexe near Harlow | £43 | £288 |
| Granny Annexe near Welwyn Garden City | £42 | £268 |
| Granny Annexe near Hatfield | £64 | £283 |
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 - £17,953

Two storey extension - £88,679

Build a timber frame extension - £26,453

Build a swimming pool - £81,453

Single storey extension - £64,056

Side return extension - £46,594

Install an RSJ - £2,653

Outbuilding - £10,453

Build a Mansard loft conversion - £52,453

Loft conversion - £37,995

Build a kitchen extension - £42,453

Hip to gable loft conversion - £42,453

Granny annexe - £87,453

Garden office - £10,453

Convert a Garage - £16,453

Garage - £18,953

Build a flat roof extension - £22,453

Build a dormer loft conversion - £42,453

Concrete foundations - £6,703

Convert a bungalow loft - £29,453

Convert a basement - £42,594