Construction companies in Northern Ireland

951 construction companies across Northern Ireland.

• N Ni Damp Solutions Ltd Carrickfergus · Damp proofing

  NI Damp Solutions Ltd offers expert mould removal and damp proofing services in Northern Ireland, protecting homes and businesses with reliable, tailo

• N NI Doors & Windows Belfast · Windows & doors

  Supplying & Fitting Premium Doors & Windows across Northern Ireland. We offer a range of styles to enhance your home's energy efficiency, security, an

• N Ni Mechanical Group Ltd Castlewellan · Heating & ventilation · 10-49 employees

  NI Mechanical Group Ltd offers precision-engineered modular solutions, skid-mounted units, and prefabrication services, specialising in heating and pl

• N Ni Mechanical Ltd Castlewellan · Plumbing

  Ni Mechanical Ltd is a plumbing company based in Castlewellan, registered at Companies House in 2020.

• N NIFed Antrim · Main contractor · 1-9 employees

  The Northern Ireland Trade Federation is a business directory promoting companies Ireland. We offer Irish tendering facilities, Business Classifieds a

• N NMC CONTRACTS Belfast · Main contractor · 1-9 employees

  NMC Contracts is a professional building contractor based in Belfast, Northern Ireland, offering a comprehensive range of building services including

• N Nmg Utilities Ltd Cushendall · Utilities · 1-9 employees

  NMG Utilities Ltd are principal contractors in the telecommunications industry, with over 30 years of experience in BT and Eircom networks.

• N North Channel Wind Ltd Newry · Civil engineering

  North Channel Wind is a prospective floating offshore wind development in the North Channel of the Irish Sea, with a potential capacity of around 1 gi

• N North Down Boilers Bangor · Heating & ventilation · 10-49 employees

  North Down Boilers: expert boiler installations, servicing, and repairs. Gas Safe & OFTEC registered engineers with over 20 years' experience. Serving

• N North Down Glazing & Locks Ltd Belfast · Glazing

  Specialists in uPVC window and door repairs and replacements, including misted double glazing, handles, hinges, and locks. Local, friendly, and reliab

• N North Down Media Walls Donaghadee · Carpentry & joinery

  North Down Media Walls designs and installs custom media walls and acoustic panelling in County Down. Transform your home with our bespoke entertainme

• N North West DéCor Ltd Strabane · Painting & decorating

  North West DéCor Ltd is a painting & decorating company based in Strabane, registered at Companies House in 2025.

• N North West Mechanical Services Ltd Londonderry · Plumbing · 10-49 employees

  NWMS offer complete piping installations, plumbing, fabrication and full gas installation & maintenance. Building Services Excellence since 1999.

• N Northern Road Markings Coleraine · Road surfacing

  Northern Road Markings delivers expert road, car park & playground marking services across UK and Ireland with certified quality standards.

• N Northern Tree Services Lisburn · Landscaping · 10-49 employees

  Professional tree surgeons in Northern Ireland offering tree care, tree removal, tree consultancy, firewood and wood chips. Established 1989.

• N Northpoint Hire Ltd Newry · Civil engineering

  Northpoint Hire Ltd is a civil engineering company based in Newry, registered at Companies House in 2025.

• N NR Electrical Systems Dungannon · Electrical

  NR Electrical Systems is an Electrical Engineering company specialising in industrial electrical contracting and automation & control.

• N Nubuild Brickwork Ltd Armagh · Bricklaying · 1-9 employees

  Nubuild Brickwork Ltd, established in 2014, offers masonry solutions across a 50-mile radius from St Albans. Specialising in brickwork and stonemasonr

• N NUGENT Co Tyrone · M&E contracting

  NUGENT is a leading Mechanical & Electrical services provider with reach across Great Britain, Northern Ireland and The Republic of Ireland.

• N Nutherm Renewables Newry · Heating & ventilation

  Nutherm Renewables Ltd specialises in the supply and installation of domestic and commercial renewable heating solutions, including air source heat pu

• O O'Hagan Crane Hire Magherafelt, · Crane hire

  O'Hagan Crane Hire is a family-run business offering crane hire, wind turbine support, haulage, and contract lifts across Ireland and the UK. Establis

• O O'Hagan Steel Services Ltd Augher · Steel fabrication · 10-49 employees

  O'Hagan Steel Services Ltd specialises in on-site welding, steel erection, and CE registered structural steel fabrications, delivering quality and pre

• O O'Neill Bros. Master Joiners Derry · Carpentry & joinery

  O'Neill Bros Master Joiners is a family-run joinery firm established in 1956, offering bespoke joinery services across Northern Ireland.

• O O'Reilly Stonemasons Ltd Armagh · Stonemasonry

  O'Reilly Stonemasons Ltd offers expert stonemasonry services across Northern and Southern Ireland, specialising in new builds, restoration, walls, fir

• O Oakhill Interiors Ltd Ballymena · Fit-out & interiors

  Oakhill Interiors specialise in office fit out, shop fit out and bespoke high end residential joinery based in Ballymena.

• O Oakleaf Contracts (Europe) Ltd Magherafelt · Drylining · 50-249 employees

  Specialists in drywall partitions, suspended ceilings & interior fit-outs. Delivering complex projects across the UK, Ireland & Europe.

• O Obr Contracts Ltd Ballymena · Roofing · 1-9 employees

  OBR Contracts is a leading commercial roofing refurbishment specialist in Northern Ireland, repairing, restoring, and maintaining industrial and comme

• O Occ Services Ltd Omagh · Main contractor

  Website suspended due to outstanding hosting payment.

• O Ocean Tiles And Bathrooms Ltd Derry · Bathroom fitting

  Ocean Tiles & Bathrooms Ltd offers innovative bathroom and wet room designs in Derry/Londonderry. With over 20 years of experience, they provide a com

• O Odm Electrical Services Ltd Dungannon · Electrical

  ODM Electrical Services offers comprehensive electrical solutions for domestic, commercial, and industrial clients, specializing in design, installati

• O OHMG Newry · Main contractor

  OHMG Ltd is a leading construction contractor and property developer across the UK and Ireland, committed to delivering infrastructure services and co

• O Olympus Roofing Solutions Ltd Newtownabbey · Roofing

  Expert roofers in Newtownabbey and Belfast providing roof repairs, flat roofing, re-roofs, and roofline services across Northern Ireland. Fully insure

• O On Track Technicians Ltd Lisburn · Rail infrastructure · 50-249 employees

  A rail-only principal contractor delivering safe, reliable infrastructure solutions, skilled teams and proven framework programmes across NI, ROI & th

• O One Electrical Services (N.I.) Ltd Belfast · Electrical

  One Electrical Services is a Belfast-based company providing a first-class electrical, plumbing, and heating service for homes and businesses across N

• O One Step Insulation Ltd Ballyclare · Insulation

  One Step Spray Foam Insulation is a family-run business specialising in open and closed cell spray foam insulation systems for residential and commerc

• O Onslow Roofing & Building Services Ltd Belfast · Roofing

  Trusted Belfast Roofers with over 30 years of experience. Offering reliable, fully insured roofing solutions and building services with award-winning

• O Orby Investment Belfast · Main contractor · 1-9 employees

  Orby Investment is a leading construction company in Northern Ireland, offering high quality property solutions across all sectors including social, p

• O Original Heating Ltd Londonderry · Heating & ventilation

  Original Heating Limited specialises in biomass heating solutions for domestic, commercial, and agricultural sectors, offering a range of boilers and

• P P B Proctor Electrical Ltd Belfast · Electrical

  P.B Proctor Electrical Ltd is a Belfast-based, family-run business with over 30 years' in the industry delivering high-quality electrical and solar se

• P P Diamond Contracts Ltd Magherafelt · House builder

  Philip Diamond Contracts has 20 years of experience in building, specialising in new builds, commercial work, renovations, and extensions. They offer

• P P Mcerlain Ltd Toomebridge · Main contractor · 1-9 employees

  P. Mcerlain Ltd is a construction company based in Toomebridge, Northern Ireland. They are committed to delivering high-quality projects.

• P P Mcvey Building Systems Ltd Antrim · Modular & offsite construction · 50-249 employees

  P McVey Building Systems are modular building specialists providing high-quality, sustainable, and cost-effective modular and temporary buildings acro

• P P Nugent Builders Ltd Craigavon · Main contractor · 1-9 employees

  P Nugent Builders & Sons is a family-run business with over 35 years of experience in building and construction services across Northern and Republic

• P P Woods & Son Ltd Strabane · Groundworks · 10-49 employees

  Family-run business specialising in waste recycling, recycled aggregates, quarry stone, muck shifting, and plant hire. Serving construction, agricultu

• P P. Mc Colgan & Sons Ltd Co L'Derry · Electrical

  P McColgan & Sons Ltd is a family-run electrical contracting business established in 1982, offering services from domestic jobs to industrial design a

• P P.J. Treacy & Sons Ltd Enniskillen · House builder · 10-49 employees

  PJ Treacy & Sons is a construction company based in Enniskillen, Northern Ireland, with a strong track record in residential and commercial projects.

• P P.K. Murphy Construction Ltd Dungannon · Main contractor · 50-249 employees

  PK Murphy Construction are one of the leading building and public works contractors within Northern Ireland. They also operate as P.K. Murphy Developm

• P PaintPVC.com Newry · Windows & doors

  PaintPVC.com offers expert onsite restoration and refurbishment of exterior windows, doors, and curtain wall systems, transforming properties and savi

• P Parkmore Roofing Ltd Magherafelt · Roofing · 1-9 employees

  Family-run roofing company with over 30 years of experience, specialising in slating, tiling, flat roofs, zinc, and lead work for residential, commerc

• P Passive Window Systems Ltd Newry · Windows & doors · 1-9 employees

  Passive Window Systems Ltd supplies and installs high-quality double and triple glazed windows, doors, and curtain walling systems. Specialising in en