Trusted and professional extension builder in BD21. Experienced in all extension buildering work and keeping within budget and on quote. C Richards...
Experienced extension builder ready to quote for your work. ROMBALDS BUILDERS LTD is the best extension builder in BD21. No obligation free quotes ...
Lawson Garage Doors is a trusted extension builder serving customers in BD21 and the surrounding area. Contact us to today to get a competitive quo...
Experienced extension builder ready to quote for your work. DAVE BEDFORD BUILDING is the best extension builder in BD21. No obligation free quotes ...
From £86,856
MM Building Services is a trusted extension builder serving customers in BD21 and the surrounding area. Contact us to today to get a competitive qu...
From £86,928
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £86,608
Need an Extension Builder in BD21? B Taylor Building Services has been helping local clients (20 mile radius) with their extension buildering jobs ...
From £86,456
William Dearnley
We are a family company that includes myself & my 4 sons who have all passed City & Guilds in their different trades
The busines...
From £86,264
Kevin Eastbury
Experienced extension builder ready to quote for your work. Altar Developments is the best extension builder in BD21. No obligation free quotes and...
From £86,688
Need an Extension Builder in BD21? TRADITIONAL BUILDING LTD has been helping local clients (20 mile radius) with their extension buildering jobs fo...

Building a granny annexe ranges from £86,264 (Altar Developments based in BD20) to £87,040 (C Richards & C Emmett based in BD20), 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 BD21 by posting a job with HaMuch. We will send it to extension builders in BD21 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Keighley | £30 | £226 |
| Granny Annexe near Bingley | £30 | £228 |
| Granny Annexe near Shipley | £29 | £226 |
| Granny Annexe near Bradford | £29 | £224 |
| Granny Annexe near Calderdale | £33 | £253 |
| Granny Annexe near Halifax | £32 | £243 |
| Granny Annexe near Pudsey | £30 | £226 |
| Granny Annexe near Brighouse | £30 | £230 |
| Granny Annexe near Nelson | £27 | £214 |
| Granny Annexe near Batley | £32 | £239 |
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 - £17,231

Two storey extension - £87,597

Build a timber frame extension - £25,731

Build a swimming pool - £80,731

Single storey extension - £49,624

Side return extension - £38,476

Install an RSJ - £1,931

Outbuilding - £9,731

Build a Mansard loft conversion - £51,731

Loft conversion - £31,230

Build a kitchen extension - £41,731

Hip to gable loft conversion - £41,731

Granny annexe - £86,731

Garden office - £9,731

Convert a Garage - £15,731

Garage - £18,231

Build a flat roof extension - £21,731

Build a dormer loft conversion - £41,731

Concrete foundations - £5,981

Convert a bungalow loft - £28,731

Convert a basement - £34,476