From £86,360
John Sillitoe Building Contractor is a trusted extension builder serving customers in Llanidloes and the surrounding area. Contact us to today to g...
From £86,512
Relax... you have found a reliable extension builder in Llanidloes. EVABUILD LIMITED is a friendly and reliable company based in Llanidloes who con...
From £86,616
Experienced extension builder ready to quote for your work. DRAGON CONSTRUCTION T/A is the best extension builder in Llanidloes. No obligation free...
From £86,520
Need to find an Extension Builder near you for all your extension buildering work?
SDW CONSTRUCTION LTD provides a local, trusted extension...
From £86,584
Need to find an Extension Builder near you for all your extension buildering work?
Cherry Build Limited provides a local, trusted extension...
From £86,608
Our building services company SP Coupland Ltd have thirty-eight years’ experience and have been helping customers in Sir Ceredigion and the surro...

Building a granny annexe ranges from £86,360 (John Sillitoe Building Contractor based in SY16) to £86,616 (DRAGON CONSTRUCTION T/A based in SY25), 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 Llanidloes by posting a job with HaMuch. We will send it to extension builders in Llanidloes who will be happy to help you.
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 - £17,033

Two storey extension - £87,300

Build a timber frame extension - £25,533

Build a swimming pool - £80,533

Single storey extension - £45,667

Side return extension - £36,250

Install an RSJ - £1,733

Outbuilding - £9,533

Build a Mansard loft conversion - £51,533

Loft conversion - £29,375

Build a kitchen extension - £41,533

Hip to gable loft conversion - £41,533

Granny annexe - £86,533

Garden office - £9,533

Convert a Garage - £15,533

Garage - £18,033

Build a flat roof extension - £21,533

Build a dormer loft conversion - £41,533

Concrete foundations - £5,783

Convert a bungalow loft - £28,533

Convert a basement - £32,250