From £86,528
Trusted and professional extension builder in Horncastle. Experienced in all extension buildering work and keeping within budget and on quote. PAUL...
From £86,544
A family run business, operating all over Lincolnshire.

Building a granny annexe ranges from £86,528 (PAUL JACKSON BUILDING CONTRS based in PE23) to £86,544 (JP Design & Develop Ltd based in LN10), 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 Horncastle by posting a job with HaMuch. We will send it to extension builders in Horncastle who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near East Lindsey | £27 | £198 |
| Granny Annexe near Boston | £28 | £262 |
| Granny Annexe near Lincoln | £31 | £232 |
| Granny Annexe near Cleethorpes | £32 | £246 |
| Granny Annexe near North East Lincolnshire | £32 | £246 |
| Granny Annexe near Grimsby | £32 | £246 |
| Granny Annexe near Spalding | £32 | £238 |
| Granny Annexe near Gainsborough | £30 | £234 |
| Granny Annexe near Newark-on-Trent | £33 | £241 |
| Granny Annexe near Grantham | £38 | £228 |
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 - £17,036

Two storey extension - £87,304

Build a timber frame extension - £25,536

Build a swimming pool - £80,536

Single storey extension - £45,720

Side return extension - £36,280

Install an RSJ - £1,736

Outbuilding - £9,536

Build a Mansard loft conversion - £51,536

Loft conversion - £29,400

Build a kitchen extension - £41,536

Hip to gable loft conversion - £41,536

Granny annexe - £86,536

Garden office - £9,536

Convert a Garage - £15,536

Garage - £18,036

Build a flat roof extension - £21,536

Build a dormer loft conversion - £41,536

Concrete foundations - £5,786

Convert a bungalow loft - £28,536

Convert a basement - £32,280