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Need to find an Extension Builder near you for all your extension buildering work?
Mount Oriel Conversions & Extensions provides a local, t...
Relax... you have found a reliable extension builder in BT8. SM Plumbing & Heating is a friendly and reliable company based in BT8 who consider no ...
From £41,176
Trusted and professional extension builder in BT8. Experienced in all extension buildering work and keeping within budget and on quote. Extended li...

In BT8, prices for dormer loft conversions range from £41,136 (Mount Oriel Conversions & Extensions based in BT8) to £41,488 (AK Building Services based in BT8), but how much your conversion costs will vary depending on the size of your property, how easy access to your roof is and what you want to use the space for.
The best way to get an accurate price is to compare quotes from extension builders in BT8. Post your job on HaMuch now and we'll put you in touch with available extension builders.
"Build a dormer loft conversion" - BT11, job posted 09/02/26
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Dormer Loft Conversion near Carryduff | £23 | £158 |
| Build A Dormer Loft Conversion near Belfast | £23 | £161 |
| Build A Dormer Loft Conversion near Saintfield | £23 | £162 |
| Build A Dormer Loft Conversion near Lisburn | £24 | £164 |
| Build A Dormer Loft Conversion near Comber | £22 | £160 |
| Build A Dormer Loft Conversion near Ballygowan | £24 | £183 |
| Build A Dormer Loft Conversion near Holywood | £23 | £159 |
| Build A Dormer Loft Conversion near Ballynahinch | £19 | £189 |
| Build A Dormer Loft Conversion near Hillsborough and Culcavy | £25 | £170 |
| Build A Dormer Loft Conversion near Greenisland | £23 | £153 |
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 - £16,792

Two storey extension - £86,938

Build a timber frame extension - £25,292

Build a swimming pool - £80,292

Single storey extension - £40,840

Side return extension - £33,535

Install an RSJ - £1,492

Outbuilding - £9,292

Build a Mansard loft conversion - £51,292

Loft conversion - £27,113

Build a kitchen extension - £41,292

Hip to gable loft conversion - £41,292

Granny annexe - £86,292

Garden office - £9,292

Convert a Garage - £15,292

Garage - £17,792

Build a flat roof extension - £21,292

Build a dormer loft conversion - £41,292

Concrete foundations - £5,542

Convert a bungalow loft - £28,292

Convert a basement - £29,535