T.I Building is a trusted extension builder serving customers in BT17 and the surrounding area. Contact us to today to get a competitive quote for ...
From £30,030
Trusted and professional extension builder in BT17. Experienced in all extension buildering work and keeping within budget and on quote. Belfast Lo...
From £30,570
Relax... you have found a reliable extension builder in BT17. Finch Construction NI is a friendly and reliable company based in BT17 who consider n...
From £28,230
Trusted and professional extension builder in BT17. Experienced in all extension buildering work and keeping within budget and on quote. Extended l...

Comparing extension builders estimates for a Convert a basement gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for the cost to convert a basement in BT17 by posting a job with HaMuch and we will send it to extension builders in BT17.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Convert A Basement near Lisburn | £24 | £164 |
| Convert A Basement near Belfast | £23 | £161 |
| Convert A Basement near Carryduff | £23 | £158 |
| Convert A Basement near Hillsborough and Culcavy | £25 | £170 |
| Convert A Basement near Maghaberry | £31 | £205 |
| Convert A Basement near Crumlin | £26 | £194 |
| Convert A Basement near Saintfield | £23 | £162 |
| Convert A Basement near Holywood | £23 | £159 |
| Convert A Basement near Comber | £22 | £160 |
| Convert A Basement near Ballynahinch | £19 | £189 |
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 - £16,824

Two storey extension - £86,986

Build a timber frame extension - £25,324

Build a swimming pool - £80,324

Single storey extension - £41,480

Side return extension - £33,895

Install an RSJ - £1,524

Outbuilding - £9,324

Build a Mansard loft conversion - £51,324

Loft conversion - £27,413

Build a kitchen extension - £41,324

Hip to gable loft conversion - £41,324

Granny annexe - £86,324

Garden office - £9,324

Convert a Garage - £15,324

Garage - £17,824

Build a flat roof extension - £21,324

Build a dormer loft conversion - £41,324

Concrete foundations - £5,574

Convert a bungalow loft - £28,324

Convert a basement - £29,895