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SM Plumbing & Heating
Relax... you have found a reliable extension builder in Holywood. SM Plumbing & Heating is a friendly and reliable company based in Holywood who co...
"Build a swimming pool" - BT4, job posted 21/09/26
£24/hr
£162/day
Ballantine building solutions
Ballantine building solutions is an established extension buildering business in Holywood. We come highly recommended and provide competitive quote...
"Two storey extension" - BT37, job posted 24/08/26
£25/hr
£173/day
Designco Ltd
Designco Ltd is an established extension buildering business in Holywood. We come highly recommended and provide competitive quotes for your work.<...
"Dormer loft conversion" - NEWTOWNABBEY, job posted 11/03/25
£23/hr
£158/day
DGA
Trusted and professional extension builder in Holywood. Experienced in all extension buildering work and keeping within budget and on quote. DGA ha...
£25/hr
£172/day
LM Design & Build
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
£21/hr
£147/day
Extended living by Gilbert-Ash
Trusted and professional extension builder in Holywood. Experienced in all extension buildering work and keeping within budget and on quote. Extend...
£21/hr
£147/day
Glenn M Floyd Building & Joinery Contracts
Glenn M Floyd Building & Joinery Contracts is an established and experienced local extension builder in Holywood. Please contact us for a free, no ...
Compare Holywood extension builders rates
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Extension Builders near Holywood | £23 | £159 |
| Extension Builders near Greenisland | £23 | £153 |
| Extension Builders near Belfast | £23 | £161 |
| Extension Builders near Carrickfergus | £23 | £158 |
| Extension Builders near Bangor | £24 | £183 |
| Extension Builders near Bangor | £24 | £183 |
| Extension Builders near Ballygowan | £24 | £183 |
| Extension Builders near Comber | £22 | £160 |
| Extension Builders near Carryduff | £23 | £158 |
| Extension Builders near Ballyclare | £20 | £124 |
Job estimates from extension builders near you
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.
Build a timber frame extension - £25,288
Garden office - £9,288
Granny annexe - £86,288
Build a flat roof extension - £21,288
Convert a Garage - £15,288
Hip to gable loft conversion - £41,288
Convert a bungalow loft - £28,288
Build a dormer loft conversion - £41,288
Build a swimming pool - £80,288
Build a Mansard loft conversion - £51,288
Concrete foundations - £5,538
Underpin a building - £16,788
Two storey extension - £86,932
Convert a basement - £29,490
Side return extension - £33,490
Loft conversion - £27,075
Garage - £17,788
Single storey extension - £40,760
Outbuilding - £9,288
Install an RSJ - £1,488
Build a kitchen extension - £41,288
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