From £87,008
I'm Sarah Reed, Director at Ministry of the Interior. We are a unique company that provides full project management and interior design services ba...
From £87,320
Work in the Bosham,Emsworth,Chichester area,build large or small extensions,allworkmen are top tradesmen,very reliable,leave job area clean on comp...
From £86,776
I have been in the construction industry for 32 years. I am a member of the Federation of Master Builders, have the requisite 3rd party insurance i...
From £86,776
Been in the building trade for over 30years .have in that time worked all over the country on many different projects.
Have city &...
From £86,816
We offer a complete design and build service for middle to high end residential projects , no project to small . We work within a 15 mile radius of...
From £86,792
Need an Extension Builder in PO18? Bespoke Living Construction Ltd has been helping local clients (20 mile radius) with their extension buildering ...
From £86,824
Oak Constructions is a trusted extension builder serving customers in PO18 and the surrounding area. Contact us to today to get a competitive quote...
From £86,824
Hardbase Construction offer a complete or part package for any of your building, refurbishments or alteration requirements. Keeping an eye on times...
From £87,056
Experienced extension builder ready to quote for your work. 77 Build Ltd is the best extension builder in PO18. No obligation free quotes and many ...
From £86,696
Need to find an Extension Builder near you for all your extension buildering work?
King and Drury provides a local, trusted extension build...

Building a granny annexe ranges from £86,696 (King and Drury based in PO19) to £87,320 (James Building Services based in PO18), 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 PO18 by posting a job with HaMuch. We will send it to extension builders in PO18 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Chichester | £34 | £242 |
| Granny Annexe near Havant & Waterloo | £35 | £248 |
| Granny Annexe near Havant | £35 | £249 |
| Granny Annexe near Bognor Regis | £35 | £247 |
| Granny Annexe near Horndean | £35 | £253 |
| Granny Annexe near Waterlooville | £36 | £250 |
| Granny Annexe near Arun | £35 | £241 |
| Granny Annexe near Portsmouth | £36 | £250 |
| Granny Annexe near Littlehampton | £35 | £244 |
| Granny Annexe near Rustington | £36 | £246 |
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 - £17,389

Two storey extension - £87,833

Build a timber frame extension - £25,889

Build a swimming pool - £80,889

Single storey extension - £52,776

Side return extension - £40,249

Install an RSJ - £2,089

Outbuilding - £9,889

Build a Mansard loft conversion - £51,889

Loft conversion - £32,708

Build a kitchen extension - £41,889

Hip to gable loft conversion - £41,889

Granny annexe - £86,889

Garden office - £9,889

Convert a Garage - £15,889

Garage - £18,389

Build a flat roof extension - £21,889

Build a dormer loft conversion - £41,889

Concrete foundations - £6,139

Convert a bungalow loft - £28,889

Convert a basement - £36,249