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T.I Building
T.I Building is a trusted extension builder serving customers in Lisburn and the surrounding area. Contact us to today to get a competitive quote f...
"Loft conversion" - BT28, job posted 19/09/26
Mount Oriel Conversions & Extensions
Need to find an Extension Builder near you for all your extension buildering work?
Mount Oriel Conversions & Extensions provides a local, t...
"Single storey extension" - BT11, job posted 03/08/26
SM Plumbing & Heating
Relax... you have found a reliable extension builder in Lisburn. SM Plumbing & Heating is a friendly and reliable company based in Lisburn who cons...
"Loft conversion" - BT28, job posted 28/05/26
£24/hr
£167/day
Belfast Loft Company
Trusted and professional extension builder in Lisburn. Experienced in all extension buildering work and keeping within budget and on quote. Belfast...
"Loft conversion" - BT28, job posted 02/02/26
"RSJ installation" - BT17, job posted 25/07/25
£26/hr
£173/day
Finch Construction NI
Relax... you have found a reliable extension builder in Lisburn. Finch Construction NI is a friendly and reliable company based in Lisburn who cons...
"Loft conversion" - DERRY, job posted 05/11/24
£21/hr
£147/day
Extended living by Gilbert-Ash
Trusted and professional extension builder in Lisburn. Experienced in all extension buildering work and keeping within budget and on quote. Extende...
"Loft conversion to 3 bedroom semi" - BT17, job posted 14/02/24
£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 Lisburn. Please contact us for a free, no o...
"Loft conversion with window stairs for bedrooms including shower and toilet" - BT17, job posted 05/11/23
£22/hr
£151/day
Three Homes Limited
Lisburn, BT28
Experienced extension builder ready to quote for your work. Three Homes Limited is the best extension builder in Lisburn. No obligation free quotes...
"Loft conversion" - LISBURN, job posted 04/10/23
Compare Lisburn extension builders rates
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Extension Builders near Lisburn | £24 | £164 |
| Extension Builders near Hillsborough and Culcavy | £25 | £170 |
| Extension Builders near Maghaberry | £31 | £205 |
| Extension Builders near Carryduff | £23 | £158 |
| Extension Builders near Belfast | £23 | £161 |
| Extension Builders near Crumlin | £26 | £194 |
| Extension Builders near Saintfield | £23 | £162 |
| Extension Builders near Ballynahinch | £19 | £189 |
| Extension Builders near Waringstown | £23 | £167 |
| Extension Builders near Comber | £22 | £160 |
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 - £25,296
Garden office - £9,296
Granny annexe - £86,296
Build a flat roof extension - £21,296
Convert a Garage - £15,296
Hip to gable loft conversion - £41,296
Convert a bungalow loft - £28,296
Build a dormer loft conversion - £41,296
Build a swimming pool - £80,296
Build a Mansard loft conversion - £51,296
Concrete foundations - £5,546
Underpin a building - £16,796
Two storey extension - £86,944
Convert a basement - £29,580
Side return extension - £33,580
Loft conversion - £27,150
Garage - £17,796
Single storey extension - £40,920
Outbuilding - £9,296
Install an RSJ - £1,496
Build a kitchen extension - £41,296
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