The 10 loft conversions from Google's results for Belfast, ranked on Google rating, online presence and other factors. Updated 10 September 2026.
Northern Ireland has separate planning and building control.
on GoogleBelfast
Attic Accessni supplies and installs loft boarding, ladders, insulation, lighting, and electrical sockets across Belfast and Northern Ireland. The team also carries out full loft conversions, beginning with an initial attic assessment.
07942 246414 81 Springfield Rd, Belfast BT12 7AE
on GoogleGlenwood Business Centre, Belfast
Belfast Loft Company delivers attic construction and joinery services throughout Belfast and the surrounding regions. Working alongside local architects and structural engineers, the team carries out full conversion projects to adapt unused roof spaces.
07545 855836 27a, Glenwood Business Centre, Belfast BT17 9QX
on GoogleBelfast
Designing attic conversion plans across Belfast and Northern Ireland, GT Building Design focuses on creating functional interior layouts. Plans include new master bedrooms with ensuite bathrooms, walk-in wardrobes, and extra shower facilities.
on GoogleBelfast
Maple Joinery Ni provides general joinery, new house builds, extensions, and attic conversions for customers in Belfast, Lisburn, and Bangor. Services include managing building work to create additional living spaces within residential properties.
on GoogleBelfast
Based in Belfast, Damp proofing Belfast handles a variety of condensation and damp problems. The company's wider offerings also extend to house renovations, property extensions, and loft conversions.
07814 590113 22 Wynchurch Ave, Belfast BT6 0JQ
on GoogleCarryduff, Belfast
Carryduff Designs offers architectural services for attic conversion projects in Carryduff and Belfast. The service evaluates headroom, structural support, and staircase access to convert empty roof spaces into bedrooms, playrooms, or studies.
07720 077465 1 Thorndale Rd N, Carryduff, Belfast BT8 8HY
on GoogleBelfast
Belfast Renovations provides joinery, plastering, loft conversions, and general building services in Belfast.
on GoogleBelfast
Tyrone Attic Stairs undertakes full attic conversions in Belfast, guiding clients from initial property surveys through to building completion. The service includes producing floor plans, managing planning permission applications, and constructing the new room.
0800 043 0480 Unit 180, 54 Bloomfield Ave, Belfast BT5 5AD
Belfast
SE Joinery provides carpentry, joinery, and loft conversion services to customers in Belfast.
Lisburn Enterprise Centre, Lisburn
Ponte System is a method for converting the attics of timber-framed houses, run by PW Design NI from Lisburn Enterprise Centre. The firm carries out these roof conversions in Belfast and across Northern Ireland, and also offers the service in Great Britain and Ireland.
028 9266 9080 Suite 712 Enterprise Cres, Lisburn Enterprise Centre, Lisburn BT28 2EH
In Belfast, velux / rooflight typically costs £22,000 – £31,000. Labour in County Antrim runs 12% below the UK median, which accounts for most of the difference from the same job elsewhere.
These are the firms from Google's results for "loft conversion belfast". They are ranked on Google rating, online presence and other factors.
The figures above are Belfast ranges. These explain what drives them, so you can read a quote properly.
Loft conversion prices by type for 2026, including VAT, with London figures, the fees and extras a builder's quote leaves out, and when planning permission applies.
When a loft conversion needs planning permission in England, the 40 and 50 cubic metre limits for dormers, what a certificate costs, and the rules in Wales, Scotland and Northern Ireland.
What a dormer loft conversion costs in 2026, the dormer types, whether your loft has the height, the planning and building regulations rules in each nation, and how long it takes.
Usually not. Most fall under permitted development if you stay within 40 cubic metres for a terrace or 50 for a semi or detached, do not go above the existing roof ridge, and use materials in keeping. Mansards and anything on a flat or in a conservation area normally do need permission.
Six to eight weeks for a dormer once work starts, plus four to eight weeks beforehand for drawings, structural calculations and building control. Scaffolding usually goes up a week ahead.