Relax... you have found a reliable extension builder in BT12. SM Plumbing & Heating is a friendly and reliable company based in BT12 who consider n...
From £51,336
Trusted and professional extension builder in BT12. Experienced in all extension buildering work and keeping within budget and on quote. Belfast Lo...
From £51,176
Trusted and professional extension builder in BT12. Experienced in all extension buildering work and keeping within budget and on quote. Extended l...

Mansard loft conversions range from the cheapest installation of £51,176 (Extended living by Gilbert-Ash based in BT12) to the dearest of around £51,368 (SM Plumbing & Heating based in BT7).
While these estimates give you a good idea how much you'll pay for a mansard loft conversion, the only way to get an accurate price is to get real quotes from real builders.
Get quotes to install a mansard loft conversion in BT12 by posting a job with HaMuch and we'll send it to extension builders in BT12.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Mansard Loft Conversion near Belfast | £23 | £161 |
| Build A Mansard Loft Conversion near Carryduff | £23 | £158 |
| Build A Mansard Loft Conversion near Holywood | £23 | £159 |
| Build A Mansard Loft Conversion near Lisburn | £24 | £164 |
| Build A Mansard Loft Conversion near Greenisland | £23 | £153 |
| Build A Mansard Loft Conversion near Comber | £22 | £160 |
| Build A Mansard Loft Conversion near Hillsborough and Culcavy | £25 | £170 |
| Build A Mansard Loft Conversion near Crumlin | £26 | £194 |
| Build A Mansard Loft Conversion near Ballygowan | £24 | £183 |
| Build A Mansard Loft Conversion near Saintfield | £23 | £162 |
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 - £16,793

Two storey extension - £86,940

Build a timber frame extension - £25,293

Build a swimming pool - £80,293

Single storey extension - £40,867

Side return extension - £33,550

Install an RSJ - £1,493

Outbuilding - £9,293

Build a Mansard loft conversion - £51,293

Loft conversion - £27,125

Build a kitchen extension - £41,293

Hip to gable loft conversion - £41,293

Granny annexe - £86,293

Garden office - £9,293

Convert a Garage - £15,293

Garage - £17,793

Build a flat roof extension - £21,293

Build a dormer loft conversion - £41,293

Concrete foundations - £5,543

Convert a bungalow loft - £28,293

Convert a basement - £29,550