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Relax... you have found a reliable extension builder in BT4. SM Plumbing & Heating is a friendly and reliable company based in BT4 who consider no ...

In BT4, prices for dormer loft conversions range from £41,368 (SM Plumbing & Heating based in BT7) to £41,368 (SM Plumbing & Heating based in BT7), 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 BT4. 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 Belfast | £23 | £161 |
| Build A Dormer Loft Conversion near Holywood | £23 | £159 |
| Build A Dormer Loft Conversion near Carryduff | £23 | £158 |
| Build A Dormer Loft Conversion near Comber | £22 | £160 |
| Build A Dormer Loft Conversion near Greenisland | £23 | £153 |
| Build A Dormer Loft Conversion near Ballygowan | £24 | £183 |
| Build A Dormer Loft Conversion near Bangor | £24 | £183 |
| Build A Dormer Loft Conversion near Bangor | £24 | £183 |
| Build A Dormer Loft Conversion near Carrickfergus | £23 | £158 |
| Build A Dormer Loft Conversion 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