Builders in Belfast
26 practices covering Belfast. Listings are business information researched by Renovome; contact details and matching happen inside Workspace.
A•••••• G••••••
Newtownabbey company installing domestic uPVC windows and doors across Northern Ireland.
B• K••••• P••••••• &•
County Down plumbing and heating service undertaking domestic plumbing problems, bathrooms and leak detection.
B••••• G•••••••• &• L••••••••
Belfast landscaping business undertaking paving, decking, fencing, artificial grass and garden maintenance.
B•••••• M••••••••
Greater Belfast home maintenance company offering plumbing, painting, roofing repairs, fencing, decking and general handyman work.
C•• P••••••• &• H••••••
County Down plumbing and heating business undertaking domestic repairs, taps, toilets, appliances and emergency plumbing.
D• R•••••• &• P•••••••
Northern Ireland roofing and property maintenance company handling roof work, plumbing, electrical repairs, flooring and general maintenance.
F•••••••• N•
Belfast flooring company supplying and fitting carpet, laminate and vinyl flooring for homes.
H•• P••••••• &• H••••••
Downpatrick plumbing and heating company carrying out domestic plumbing work and bathroom projects.
L•••••••• F•••••••
Northern Ireland flooring business supplying and fitting wood, LVT and vinyl flooring.
N••••••• W•••••• &• J••••••
Belfast family business supplying and fitting PVC and timber windows, doors and joinery products.
P• J•••••• &• B•••••••
Domestic trade and property maintenance business serving Belfast and surrounding areas.
R••••• N••••••• I••••••
Northern Ireland roofing contractor undertaking domestic roof repairs, installations, roof windows and guttering.
T•• R••••• H•••• T••••••••
Domestic trade and property maintenance business serving Greater Belfast, North Down and Ards.
U••• E•••••••• C••
Belfast electrical company undertaking domestic fault finding, rewires, lighting, smoke alarms and consumer-unit work.
A•• G••••
Residential building contractor serving Belfast, Bangor and Newtownards, Northern Ireland.
B••••••• C••••••••
Residential building contractor serving County Down and Belfast, Northern Ireland.
C•••• C•••••••• L••
Residential building contractor serving Belfast, Northern Ireland.
C•••• S•••• L••
Residential building contractor serving Belfast and County Down, Northern Ireland.
J•• C••••••••
Residential building contractor serving Belfast and County Down, Northern Ireland.
L•••••• E•••
Residential building contractor serving Belfast and Northern Ireland.
M••••• C••••••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in Belfast / Northern Ireland.
M•••••••• &• W•••• L••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in Belfast / Northern Ireland.
P• B••••••• B••••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in Belfast.
S•• B••••••• S•••••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in Belfast / County Down.
S•••••• C••••••••
Residential building contractor serving Newtownabbey and Belfast, Northern Ireland.
T•• C•••••••• &• B•••••••
Residential building contractor serving Belfast, Northern Ireland.
How to choose a builder in Belfast
You appoint a builder once the scope is defined. If you invite builders before the drawings and specification are settled, every quote prices a different job and you cannot compare them.
- Give every builder the same drawings, specification and programme, then compare line by line.
- Check the company at Companies House, and ask how long the team has worked together.
- Visit a current site, not just a finished photo.
- Ask for public liability insurance and, where relevant, a warranty or guarantee.
- Agree a payment schedule tied to stages completed, never a large payment up front.
What builders in Belfast typically work on
- Single and two-storey extensions
- Loft conversions and garage conversions
- Kitchen and bathroom refits
- Structural openings and knock-throughs
- Whole-house refurbishments
Typical 2026 fees for builders
| Item | Typical 2026 cost |
|---|---|
| Extension shell, per square metre | £2,300 - £3,400 |
| Single-storey rear extension, 20 sq m | £52,000 - £86,000 |
| Loft conversion, rear dormer | £48,000 - £78,000 |
| Structural opening with flush beam | £4,500 - £12,000 |
| Day rate, two-person team | £380 - £620 |
Indicative 2026 UK ranges, not quotations. London and the South East usually sit at the top of each range. Last reviewed: September 2026.
Common questions
- How many builders should I ask to quote?
- Three is enough, provided all three price the same written scope. More quotes on a vague brief produce a wider spread, not better information.
- Why do quotes for the same job differ so much?
- Usually because they include different work. Compare the inclusions, exclusions and provisional sums before you compare the totals.
Read next
Brief several builders at once
Renovome Workspace shortlists suitable practices for your project, sends one consistent brief and lays the responses out side by side so you compare scope, not just price.
Start your project