From £87,352
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,024
Need an Extension Builder in CM17? Loft in Space London has been helping local clients (20 mile radius) with their extension buildering jobs for ma...
From £87,168
Welstrong Construction is a team of friends and brothers who enjoy working in the building industry and aim to make sure every customer is fully sa...
From £86,840
Urban lofts and extensions ltd is an established extension buildering business in CM17. We come highly recommended and provide competitive quotes f...
From £87,080
VIBE CONSTRUCTION LIMITED is an established extension buildering business in CM17. We come highly recommended and provide competitive quotes for yo...
From £87,400
Experienced extension builder ready to quote for your work. RICHARD MORRIS (CONSTRUCTION) is the best extension builder in CM17. No obligation free...
From £87,168
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,000
Our building services company Added Space Ltd have over fifty years combined experience. We have been helping customers in Harlow and the surroundi...
From £87,056
With over 20 years of experience we specialise in fit-outs and maximising your living space. Lofts, extensions, basements, new builds and domestic ...
From £90,152
We are small building company working for the residential and domestic properties? We work on all types of buildings creating Loft conversion and H...

Building a granny annexe ranges from £86,840 (Urban lofts and extensions ltd based in cm20) to £90,152 (Essex loft extensions Ltd based in CM20), 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 CM17 by posting a job with HaMuch. We will send it to extension builders in CM17 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Harlow | £43 | £288 |
| Granny Annexe near Hoddesdon | £46 | £296 |
| Granny Annexe near Bishop's Stortford | £42 | £264 |
| Granny Annexe near Ware | £47 | £296 |
| Granny Annexe near Epping Forest | £44 | £273 |
| Granny Annexe near Loughton | £44 | £273 |
| Granny Annexe near Cheshunt | £48 | £286 |
| Granny Annexe near Hertford | £46 | £289 |
| Granny Annexe near East Hertfordshire | £44 | £289 |
| Granny Annexe near Romford | £45 | £275 |
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 - £17,924

Two storey extension - £88,636

Build a timber frame extension - £26,424

Build a swimming pool - £81,424

Single storey extension - £63,480

Side return extension - £46,270

Install an RSJ - £2,624

Outbuilding - £10,424

Build a Mansard loft conversion - £52,424

Loft conversion - £37,725

Build a kitchen extension - £42,424

Hip to gable loft conversion - £42,424

Granny annexe - £87,424

Garden office - £10,424

Convert a Garage - £16,424

Garage - £18,924

Build a flat roof extension - £22,424

Build a dormer loft conversion - £42,424

Concrete foundations - £6,674

Convert a bungalow loft - £29,424

Convert a basement - £42,270