From £51,296
Been in business as 18 years alway put clients first and never had any combacks
From £51,376
Antrim, BT36
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £51,432
We have over 25 years experience in all building work and renowned for good workmanship All jobs small and large taken on
From £51,384
Antrim, BT36
Designco Ltd is an established extension buildering business in Antrim. We come highly recommended and provide competitive quotes for your work.
From £51,336
Trusted and professional extension builder in Antrim. Experienced in all extension buildering work and keeping within budget and on quote. Belfast ...
From £51,264
Antrim, BT37
Trusted and professional extension builder in Antrim. Experienced in all extension buildering work and keeping within budget and on quote. DGA have...
From £51,296
Antrim, BT37
Ballantine building solutions is an established extension buildering business in Antrim. We come highly recommended and provide competitive quotes ...
From £51,176
Trusted and professional extension builder in Antrim. Experienced in all extension buildering work and keeping within budget and on quote. Extended...
From £51,384
Antrim, BT28
Relax... you have found a reliable extension builder in Antrim. Finch Construction NI is a friendly and reliable company based in Antrim who consid...

Mansard loft conversions range from the cheapest installation of £51,176 (Extended living by Gilbert-Ash based in BT12) to the dearest of around £52,560 (Build a Boiler based in BT67).
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 Antrim by posting a job with HaMuch and we'll send it to extension builders in Antrim.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Mansard Loft Conversion near Crumlin | £26 | £194 |
| Build A Mansard Loft Conversion near Ballyclare | £20 | £124 |
| Build A Mansard Loft Conversion near Magherafelt | £30 | £238 |
| Build A Mansard Loft Conversion near Maghaberry | £31 | £205 |
| Build A Mansard Loft Conversion near Greenisland | £23 | £153 |
| Build A Mansard Loft Conversion near Belfast | £23 | £161 |
| Build A Mansard Loft Conversion near Lisburn | £24 | £164 |
| Build A Mansard Loft Conversion near Carrickfergus | £23 | £158 |
| Build A Mansard Loft Conversion near Holywood | £23 | £159 |
| Build A Mansard Loft Conversion near Hillsborough and Culcavy | £25 | £170 |
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 - £16,950

Two storey extension - £87,176

Build a timber frame extension - £25,450

Build a swimming pool - £80,450

Single storey extension - £44,008

Side return extension - £35,317

Install an RSJ - £1,650

Outbuilding - £9,450

Build a Mansard loft conversion - £51,450

Loft conversion - £28,598

Build a kitchen extension - £41,450

Hip to gable loft conversion - £41,450

Granny annexe - £86,450

Garden office - £9,450

Convert a Garage - £15,450

Garage - £17,950

Build a flat roof extension - £21,450

Build a dormer loft conversion - £41,450

Concrete foundations - £5,700

Convert a bungalow loft - £28,450

Convert a basement - £31,317