From £9,336
Trusted and professional extension builder in Crumlin. Experienced in all extension buildering work and keeping within budget and on quote. Belfast...
From £9,384
Relax... you have found a reliable extension builder in Crumlin. Finch Construction NI is a friendly and reliable company based in Crumlin who cons...
From £9,376
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £9,176
Trusted and professional extension builder in Crumlin. Experienced in all extension buildering work and keeping within budget and on quote. Extende...
From £9,400
T.I Building is a trusted extension builder serving customers in Crumlin and the surrounding area. Contact us to today to get a competitive quote f...
From £9,384
Designco Ltd is an established extension buildering business in Crumlin. We come highly recommended and provide competitive quotes for your work.
From £9,368
Relax... you have found a reliable extension builder in Crumlin. SM Plumbing & Heating is a friendly and reliable company based in Crumlin who cons...
From £9,296
Ballantine building solutions is an established extension buildering business in Crumlin. We come highly recommended and provide competitive quotes...
From £9,264
Trusted and professional extension builder in Crumlin. Experienced in all extension buildering work and keeping within budget and on quote. DGA hav...

Outbuilding costs in Crumlin range from the cheapest of £9,176 (Extended living by Gilbert-Ash based in BT12) to the dearest of £10,560 (Build a Boiler based in BT67), but these are just estimates.
Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build an outbuilding in Crumlin by posting a job with HaMuch and we will send it to extension builders.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Outbuilding near Crumlin | £26 | £194 |
| Outbuilding near Maghaberry | £31 | £205 |
| Outbuilding near Lisburn | £24 | £164 |
| Outbuilding near Hillsborough and Culcavy | £25 | £170 |
| Outbuilding near Belfast | £23 | £161 |
| Outbuilding near Ballyclare | £20 | £124 |
| Outbuilding near Carryduff | £23 | £158 |
| Outbuilding near Waringstown | £23 | £167 |
| Outbuilding near Greenisland | £23 | £153 |
| Outbuilding near Holywood | £23 | £159 |
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 - £16,954

Two storey extension - £87,182

Build a timber frame extension - £25,454

Build a swimming pool - £80,454

Single storey extension - £44,088

Side return extension - £35,362

Install an RSJ - £1,654

Outbuilding - £9,454

Build a Mansard loft conversion - £51,454

Loft conversion - £28,635

Build a kitchen extension - £41,454

Hip to gable loft conversion - £41,454

Granny annexe - £86,454

Garden office - £9,454

Convert a Garage - £15,454

Garage - £17,954

Build a flat roof extension - £21,454

Build a dormer loft conversion - £41,454

Concrete foundations - £5,704

Convert a bungalow loft - £28,454

Convert a basement - £31,362