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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 BT4 by posting a job with HaMuch and we will send it to extension builders in BT4.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Convert A Basement near Belfast | £23 | £161 |
| Convert A Basement near Holywood | £23 | £159 |
| Convert A Basement near Carryduff | £23 | £158 |
| Convert A Basement near Comber | £22 | £160 |
| Convert A Basement near Greenisland | £23 | £153 |
| Convert A Basement near Ballygowan | £24 | £183 |
| Convert A Basement near Bangor | £24 | £183 |
| Convert A Basement near Bangor | £24 | £183 |
| Convert A Basement near Carrickfergus | £23 | £158 |
| Convert A Basement near Lisburn | £24 | £164 |
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 - £16,868

Two storey extension - £87,052

Build a timber frame extension - £25,368

Build a swimming pool - £80,368

Single storey extension - £42,360

Side return extension - £34,390

Install an RSJ - £1,568

Outbuilding - £9,368

Build a Mansard loft conversion - £51,368

Loft conversion - £27,825

Build a kitchen extension - £41,368

Hip to gable loft conversion - £41,368

Granny annexe - £86,368

Garden office - £9,368

Convert a Garage - £15,368

Garage - £17,868

Build a flat roof extension - £21,368

Build a dormer loft conversion - £41,368

Concrete foundations - £5,618

Convert a bungalow loft - £28,368

Convert a basement - £30,390