Northern Ireland
Ranked by how readable each website is to a machine, using the WebScore Guru instrument. Part of the national plumbers and heating engineers table.
| # | Company | Town | Score | Band |
|---|---|---|---|---|
| 1 | CHILL GAS LTD www.chillgas.co.uk | Belfast | 90 | Machine-native 2026-10-13 |
| 2 | B9 ENERGY STORAGE LTD b9energy.co.uk | Larne | 89 | Machine-ready 2026-10-04 |
| 3 | SOLV GROUP LTD www.solvgroup.com | Belfast | 88 | Machine-ready 2026-10-01 |
| 4 | THE LEAK DOCTOR LTD www.leakdoctor.com | Newry | 88 | Machine-ready 2026-10-07 |
| 5 | DJM PLUMBING LTD iplumb.pro | Coleraine | 86 | Machine-ready 2026-10-09 |
| 6 | FLUID PLUMBING & HEATING LTD www.fluidplumbingheating.com | Belfast | 85 | Machine-ready 2026-10-08 |
| 7 | J & CH PLUMBING SERVICES LIMITED chplumbingservices.com | Moira | 85 | Machine-ready 2026-10-03 |
| 8 | PIPECRAFT LIMITED www.pipecraft.co.uk | Toomebridge | 84 | Machine-ready 2026-10-13 |
| 9 | R J SMYTH ENGINEERING LIMITED www.smythengineering.com | Omagh | 83 | Machine-ready 2026-10-02 |
| 10 | BELFAST BOILER INSTALLATIONS LTD belfastboilerinstallations.com | Newtownabbey | 82 | Machine-ready 2026-10-14 |
| 11 | MAYFAIR PLUMBERS LTD www.mayfairplumbers.london | Belfast | 82 | Machine-ready 2026-10-14 |
| 12 | CONNECT PLUMBERS LIMITED connectplumbers.com | Belfast | 81 | Machine-ready 2026-10-11 |
| 13 | BLACK DIAMOND RENOVATIONS LTD blackdiamond.co.uk | Carrickfergus | 80 | Machine-ready 2026-10-12 |
| 14 | FIRST CLASS SOLAR LTD firstclasssolar.co.uk | Belfast | 80 | Machine-ready 2026-10-15 |
| 15 | PLUMBRITE LTD www.plumbriteplumbingandheating.co.uk | Portadown | 80 | Machine-ready 2026-10-10 |
| 16 | SURGE RENEWABLES LTD surge-renewables.com | Belfast | 80 | Machine-ready 2026-10-16 |
| 17 | C KELLY PLUMBING & HEATING LTD kellyplumbingheating.com | Enniskillen | 79 | Machine-ready 2026-10-12 |
| 18 | J & B HAMILTON LIMITED www.hamilton.co.uk | Magherafelt | 79 | Machine-ready 2026-10-02 |
| 19 | KELLY HEATING SERVICES LTD www.kellyheatingni.com | Belfast | 79 | Machine-ready 2026-10-15 |
| 20 | P LYNCH PLUMBING & HEATING LIMITED lynchplumbing.com | Londonderry | 79 | Machine-ready 2026-10-15 |
| 21 | BELMONT PLUMBING SERVICES LTD www.belmontplumbingservices.co.uk | Lisburn | 78 | Machine-ready 2026-10-15 |
| 22 | POWERTECH REFRIGERATION LTD powertechrefrigeration.com | Armagh | 78 | Machine-ready 2026-10-02 |
| 23 | S MATTHEWS LIMITED www.matthews.com | Co Down | 78 | Machine-ready 2026-10-03 |
| 24 | EN-VENT LTD www.envent.com | Belfast | 77 | Machine-ready 2026-10-14 |
| 25 | PHOENIX ENERGY SERVICES LIMITED phoenixenergyni.com | Belfast | 77 | Machine-ready 2026-10-01 |
| 26 | W.G HODGEN LIMITED www.hodgen.co.uk | Belfast | 77 | Machine-ready 2026-10-01 |
| 27 | BROOKLAWN SERVICES LTD brooklawnservices.com | Newry | 76 | Machine-ready 2026-10-12 |
| 28 | COR MAC PLUMBING AND HEATING LTD cormac.co.uk | Newry | 76 | Machine-ready 2026-10-13 |
| 29 | DG GAS SAFETY LTD www.dggas.co.uk | Belfast | 76 | Machine-ready 2026-10-08 |
| 30 | NI PLUMBING SERVICES LTD www.niplumbingservices.co.uk | Ballymena | 76 | Machine-ready 2026-10-13 |
| 31 | SAFE GAS (N.I.) LIMITED safegas.co.uk | Newtownabbey | 76 | Machine-ready 2026-10-05 |
| 32 | TEAM MECHANICAL LTD www.teammechanical.com | Craigavon | 76 | Machine-ready 2026-10-04 |
| 33 | ATS GAS SERVICES LIMITED www.atsgas.com | Belfast | 75 | Machine-ready 2026-10-07 |
| 34 | BOOTH PLUMBING LIMITED www.boothplumbing.co.uk | Cookstown | 75 | Machine-ready 2026-10-05 |
| 35 | HOWARD HEATING SOLUTIONS LIMITED www.howardheating.co.uk | Newcastle | 75 | Machine-ready 2026-10-10 |
| 36 | M&DT PLUMBING AND HEATING LTD dtplumbing.co.uk | Larne | 75 | Machine-ready 2026-10-14 |
| 37 | MCGAFFIN MECHANICAL LTD www.mcgaffinmechanical.com | Banbridge | 75 | Machine-ready 2026-10-06 |
| 38 | NI LEAKY FINDERS LTD www.nileakyfinders.com | Ballymena | 75 | Machine-ready 2026-10-13 |
| 39 | SUREFIRE HEATING LTD www.surefireheating.com | Lisburn | 75 | Machine-ready 2026-10-16 |
| 40 | DAVID ANDERSON (PLUMBING & HEATING SERVICES) LTD djaa.com | Co. Armagh | 74 | Partly readable 2026-10-02 |
| 41 | HTC MECHANICAL SERVICES LIMITED www.htcmechanical.com | Dungannon | 74 | Partly readable 2026-10-03 |
| 42 | KELLY MECHANICAL SERVICES (NI) LTD www.kellymechanical.co.uk | Dungannon | 74 | Partly readable 2026-10-12 |
| 43 | MCALEER & MCGARRITY LTD mcaleermcgarrity.com | Northern Ireland | 74 | Partly readable 2026-10-02 |
| 44 | MCALEER & MCGARRITY MECHANICAL LTD mcaleermcgarrity.com | Cookstown | 74 | Partly readable 2026-10-15 |
| 45 | NORTHERN MECHANICAL LTD northernmechanical.com | Belfast | 74 | Partly readable 2026-10-01 |
| 46 | ALTERNATIVE HEAT LIMITED www.alternativeheat.co.uk | Banbridge | 73 | Partly readable 2026-10-03 |
| 47 | C KANE PLUMBING & HEATING LTD www.kaneplumbingheating.co.uk | Castlewellan | 73 | Partly readable 2026-10-09 |
| 48 | PRECISION PLUMBING SERVICES LIMITED precisionplumbingservices.com | Strabane | 73 | Partly readable 2026-10-08 |
| 49 | SIGNATURE PLUMBING SOLUTIONS LTD signatureplumbingsolutions.com | Newtownards | 73 | Partly readable 2026-10-14 |
| 50 | CAUSEWAY LEAK DETECTION LTD causewayleakdetection.co.uk | Coleraine | 72 | Partly readable 2026-10-12 |
| 51 | FTG HEATING LIMITED ftg-heating.com | Belfast | 72 | Partly readable 2026-10-12 |
| 52 | BELFAST HEATING LTD belfastheating.com | Newtownabbey | 71 | Partly readable 2026-10-12 |
| 53 | WARMTH SHIELD LTD warmthshield.com | Ballynahinch | 71 | Partly readable 2026-10-14 |
| 54 | ADS MECHANICAL LIMITED www.adsmechanical.com | Ballynahinch | 70 | Partly readable 2026-10-09 |
| 55 | ATLAS MECHANICAL SERVICES LIMITED www.atlasmechanical.com | Belfast | 70 | Partly readable 2026-10-09 |
| 56 | CJ MECHANICAL LTD www.cjmechanical.co.uk | Newry | 70 | Partly readable 2026-10-08 |
| 57 | DJH BOILER SERVICES LTD www.djhboilerservices.co.uk | Newtownards | 70 | Partly readable 2026-10-10 |
| 58 | IVEAGH HEATING LIMITED www.iveaghheating.co.uk | Newry | 70 | Partly readable 2026-10-13 |
| 59 | MJK PLUMBING SERVICES LTD www.mjkplumbing.com | Downpatrick | 70 | Partly readable 2026-10-06 |
| 60 | PH PLUMBING AND HEATING LIMITED www.phplumbing.co.uk | Newry | 70 | Partly readable 2026-10-01 |
| 61 | HARVEY GROUP PLC www.harveygroup.co.uk | Newtownabbey | 69 | Partly readable 2026-10-01 |
| 62 | M & L MECHANICAL ENGINEERING LTD mechanical-engineering.com | Londonderry | 69 | Partly readable 2026-10-11 |
| 63 | MS CAMPBELL PLUMBING AND HEATING LIMITED mscampbell.uk | Enniskillen | 69 | Partly readable 2026-10-16 |
| 64 | AED BOILER SERVICES LTD aedboilerservices.com | Cookstown | 68 | Partly readable 2026-10-12 |
| 65 | JD HEATING AND PLUMBING LTD www.jdheating.co.uk | Castlereigh | 68 | Partly readable 2026-10-14 |
| 66 | PRECISION MECHANICAL CONTRACTORS LTD precisionmechanicalcontractors.com | Londonderry | 68 | Partly readable 2026-10-04 |
| 67 | SPERRIN SOLAR SYSTEMS LIMITED sperrinsolar.com | Omagh | 68 | Partly readable 2026-10-06 |
| 68 | CASSIDY BROS. (PLUMBING & HEATING) LIMITED cassidybros.com | Coleraine | 67 | Partly readable 2026-10-03 |
| 69 | GREEN HEATING SOLUTIONS LTD greenheatingsolutions.com | Banbridge | 67 | Partly readable 2026-10-15 |
| 70 | C H P MECHANICAL SERVICES LTD www.mechanicalservices.com | Dundrum | 66 | Partly readable 2026-10-05 |
| 71 | E.R.M. MECHANICAL SERVICES LIMITED www.mechanicalservices.com | Londonderry | 66 | Partly readable 2026-10-01 |
| 72 | EF PLUMBING & HEATING LTD www.efplumbing.co.uk | Lisburn | 66 | Partly readable 2026-10-13 |
| 73 | HEANEY HEATING LIMITED heaneyheating.co.uk | Belfast | 66 | Partly readable 2026-10-05 |
| 74 | HEANEY HEATING PLUMBING LIMITED heaneyheating.co.uk | Belfast | 66 | Partly readable 2026-10-07 |
| 75 | J AND D MECHANICAL SERVICES LTD www.mechanicalservices.com | Newry | 66 | Partly readable 2026-10-16 |
| 76 | PROJECT ZERO CARBON LIMITED sell.amazon.com | Londonderry | 66 | Partly readable 2026-10-11 |
| 77 | R & F MECHANICAL SERVICES LIMITED www.mechanicalservices.com | Co.Antrim | 66 | Partly readable 2026-10-01 |
| 78 | MAYNE PLUMBING & HEATING LTD mayneplumbing.com | Belfast | 65 | Partly readable 2026-10-02 |
| 79 | B.L. REFRIGERATION & AIR CONDITIONING LIMITED www.hugedomains.com | Belfast | 64 | Partly readable 2026-10-01 |
| 80 | CDK GROUP LTD cdkgroup.co.uk | Omagh | 64 | Partly readable 2026-10-10 |
| 81 | CLIMATE SOURCE LTD www.climatesource.co.uk | Dungannon | 64 | Partly readable 2026-10-06 |
| 82 | ENERGY TECH (NI) LTD energytechni.com | Armagh | 64 | Partly readable 2026-10-06 |
| 83 | H & A MECHANICAL SERVICES LIMITED www.mechanicalservices.com | Draperstown | 64 | Partly readable 2026-10-01 |
| 84 | HELIOS GAS LTD www.heliosgas.com | Newtownabbey | 64 | Partly readable 2026-10-14 |
| 85 | MARSHALL HEATING SERVICES LTD www.hugedomains.com | Belfast | 64 | Partly readable 2026-10-07 |
| 86 | MORGAN MECHANICAL LTD www.hugedomains.com | Warrenpoint | 64 | Partly readable 2026-10-08 |
| 87 | MORGAN PLUMBING SERVICES LTD www.hugedomains.com | Castlewellan | 64 | Partly readable 2026-10-09 |
| 88 | PT MECHANICAL LIMITED www.hugedomains.com | Warrenpoint | 64 | Partly readable 2026-10-15 |
| 89 | TMS N.I. LTD www.hugedomains.com | Newtownabbey | 64 | Partly readable 2026-10-15 |
| 90 | AF MECHANICAL LTD afmechanical.co.uk | Downpatrick | 63 | Partly readable 2026-10-14 |
| 91 | ASKING SOLUTIONS LIMITED askingsolutions.com | Bangor | 63 | Partly readable 2026-10-13 |
| 92 | CONDENSATION SOLUTIONS LTD www.condensationsolutions.co.uk | Newry | 63 | Partly readable 2026-10-08 |
| 93 | ENERCON ECV LTD enerconecv.co.uk | Armagh | 63 | Partly readable 2026-10-09 |
| 94 | MOONEY MECHANICAL INSTALLATIONS LTD www.mooneymechanicalinstallations.com | Ballymena | 63 | Partly readable 2026-10-03 |
| 95 | JO LEONARD PLUMBING AND HEATING CONTRACTOR LTD joleonard.com | Newtownards | 62 | Partly readable 2026-10-11 |
| 96 | LEAR MECHANICAL SERVICES LTD www.learmechanical.co.uk | Londonderry | 62 | Partly readable 2026-10-05 |
| 97 | MEM PLUMBING LTD www.memplumbing.co.uk | Coleraine | 62 | Partly readable 2026-10-04 |
| 98 | SHANE MECHANICAL (LONDON) LTD www.shanemechanicallondon.co.uk | Ballymena | 62 | Partly readable 2026-10-10 |
| 99 | SM PLUMBING AND GAS SERVICES LTD www.smplumbing.co.uk | Belfast | 62 | Partly readable 2026-10-16 |
| 100 | DMG HEATING LTD www.dmgheating.com | Ballygawley | 61 | Partly readable 2026-10-12 |
| 101 | DNA HEAT LTD www.dnaheat.com | Ballygawley | 61 | Partly readable 2026-10-14 |
| 102 | FMN SERVICES LIMITED fmnservices.com | Londonderry | 61 | Partly readable 2026-10-07 |
| 103 | GILMORE PLUMBING LTD gilmoreplumbing.com | Coleraine | 61 | Partly readable 2026-10-05 |
| 104 | PIPE TECH PLUMBING & MECHANICAL LTD www.pipetech.co.uk | Newry | 61 | Partly readable 2026-10-04 |
| 105 | TRI-POWER ENVIRONMENTAL ENERGY LIMITED tripower.com | 18 Westbank Road | 61 | Partly readable 2026-10-03 |
| 106 | KANE GROUP BUILDING SERVICES LTD kanegroup.co.uk | Banbridge | 60 | Partly readable 2026-10-02 |
| 107 | J&S RENEWABLES LIMITED renewables.com | Derry | 59 | Partly readable 2026-10-13 |
| 108 | EMD BOILER SERVICES LTD www.emdplumbingheating.co.uk | Londonderry | 58 | Partly readable 2026-10-14 |
| 109 | IGNITE PLUMBING SERVICES (IRE) LTD igniteplumbing.com | Magherafelt | 58 | Partly readable 2026-10-13 |
| 110 | ADAIR BUILDING SERVICES LTD adairbuildingservices.co.uk | Banbridge | 57 | Partly readable 2026-10-06 |
| 111 | APCR LIMITED apcrplumbing.co.uk | Bangor | 56 | Partly readable 2026-10-10 |
| 112 | MCG CONTRACTS LTD mcgcontracts.com | Magherafelt | 56 | Partly readable 2026-10-02 |
| 113 | N MCKERNAN LTD mckernan.com | Armagh | 56 | Partly readable 2026-10-12 |
| 114 | NI MECHANICAL GROUP LTD nimechanical.com | Castlewellan | 56 | Partly readable 2026-10-09 |
| 115 | NI MECHANICAL LTD nimechanical.com | Castlewellan | 56 | Partly readable 2026-10-12 |
| 116 | CHC GROUP LIMITED www.chcgroup.co.uk | Co.Armagh | 55 | Partly readable 2026-10-01 |
| 117 | SMART GAS PLUMBING LTD smartgasplumbing.com | Belfast | 54 | Human-only 2026-10-14 |
| 118 | ANDERSON MECHANICAL LIMITED andersonmechanical.com | Belfast | 53 | Human-only 2026-10-10 |
| 119 | CMK MECHANICAL SERVICES LTD cmkmechanical.com | Dungannon | 53 | Human-only 2026-10-04 |
| 120 | IAN MOORE HEATING LTD www.ianmoore.com | Ballynahinch | 53 | Human-only 2026-10-04 |
| 121 | IRWIN M&E LIMITED www.irwintools.co.uk | Craigavon | 53 | Human-only 2026-10-01 |
| 122 | VICON ENGINEERING LTD viconengineering.com | Omagh | 53 | Human-only 2026-10-13 |
| 123 | CT PLUMBING & HEATING LIMITED www.ctplumbingheating.com | Omagh | 52 | Human-only 2026-10-08 |
| 124 | HEAT & ENERGY CONSULTING LIMITED venture.com | Ballymoney | 52 | Human-only 2026-10-14 |
| 125 | P V THOMPSON LTD thompson.co.uk | Craigavon | 52 | Human-only 2026-10-12 |
| 126 | MICHAEL NUGENT LTD www.michaelnugent.com | Co Tyrone | 51 | Human-only 2026-10-01 |
| 127 | MOURNE LEAK FINDERS LTD mourneleakfinders.com | Newry | 51 | Human-only 2026-10-10 |
| 128 | PATRICK HUGHES LIMITED www.patrickhughes.co.uk | Newtownards | 51 | Human-only 2026-10-07 |
| 129 | IAN SHORT PLUMBING & HEATING LTD ianshort.com | Omagh | 50 | Human-only 2026-10-03 |
| 130 | ORIGINAL HEATING LIMITED www.originalheating.com | Londonderry | 50 | Human-only 2026-10-05 |
| 131 | CLASSIQUE FIREPLACES LTD classiquefireplaces.com | Carrickfergus | 49 | Human-only 2026-10-14 |
| 132 | CONWAY MECHANICAL SERVICES LIMITED conwaymechanicalservices.co.uk | Magherafelt | 49 | Human-only 2026-10-08 |
| 133 | JONES GAS SERVICES LIMITED jonesgasservices.com | Belfast | 49 | Human-only 2026-10-12 |
| 134 | MCKINNEY GAS AND OIL LTD mckinneygas.com | Ballyclare | 49 | Human-only 2026-10-14 |
| 135 | NW PLUMBING AND HEATING LTD nwplumbingheating.co.uk | Londonderry | 49 | Human-only 2026-10-16 |
| 136 | O'BRIEN MECHANICAL LIMITED obrienmechanical.com | Omagh | 49 | Human-only 2026-10-09 |
| 137 | PAUL DARBY PLUMBING & HEATING LTD pauldarby.co.uk | Newtownabbey | 49 | Human-only 2026-10-02 |
| 138 | PM PLUMBING & HEATING SERVICES LTD pmplumbing.co.uk | Northern Ireland | 49 | Human-only 2026-10-03 |
| 139 | TEAM AQUA PLUMBING SERVICES LTD teamaqua.co.uk | Belfast | 49 | Human-only 2026-10-12 |
| 140 | DERRY PLUMBING LIMITED derry-plumbing.com | Derry | 48 | Human-only 2026-10-14 |
| 141 | EVOTECH LTD www.evotech.co.uk | Northern Ireland | 48 | Human-only 2026-10-03 |
| 142 | N. ROGERS PLUMBING & HEATING LTD rogersplumbing.com | Craigavon | 48 | Human-only 2026-10-13 |
| 143 | RMK BATHROOMS LTD rmkbathrooms.co.uk | Dungannon | 48 | Human-only 2026-10-15 |
| 144 | THE GAS MAN (N.I.) LTD gasman.com | Larne | 48 | Human-only 2026-10-12 |
| 145 | DMG PLUMBING SERVICES LTD dmgplumbing.co.uk | Ballymoney | 47 | Human-only 2026-10-07 |
| 146 | EFFICIENT PLUMBING AND HEATING SERVICES LTD efficientplumbing.co.uk | Belfast | 47 | Human-only 2026-10-14 |
| 147 | KINETIC M&E LTD kinetic.co.uk | Belfast | 47 | Human-only 2026-10-13 |
| 148 | CD MECHANICAL SERVICES LTD cdmechanicalservices.com | Larne | 46 | Human-only 2026-10-13 |
| 149 | ACR ENERGY SOLUTIONS LIMITED acrenergy.com | Londonderry | 45 | Human-only 2026-10-05 |
| 150 | CMAC N.I. LIMITED buydomainnames.co.uk | Belfast | 45 | Human-only 2026-10-13 |
| 151 | MR MECHANICAL SERVICES LTD mrmechanicalservices.com | Warrenpoint | 45 | Human-only 2026-10-07 |
| 152 | SYDNEY BROWN & SON LTD www.sydneybrown.com | Dungannon | 45 | Human-only 2026-10-02 |
| 153 | GAS DESIGN SOLUTIONS LIMITED gasdesignsolutions.co.uk | Newtownabbey | 44 | Human-only 2026-10-05 |
| 154 | GS PLUMBING & HEATING (N.I.) LIMITED www.gsplumbingheating.co.uk | Magherafelt | 44 | Human-only 2026-10-08 |
| 155 | MCCUSKER LIMITED mccusker.com | Newry | 42 | Human-only 2026-10-08 |
| 156 | WARMSAVE LIMITED warmsave.co.uk | Lisburn | 42 | Human-only 2026-10-07 |
| 157 | DEVLIN MECHANICAL LIMITED devlinmechanical.com | Co Antrim | 41 | Human-only 2026-10-03 |
| 158 | H2YDRO LIMITED www.hugedomains.com | Ballyclare | 41 | Human-only 2026-10-12 |
| 159 | HYDROGAS(N.I.) LTD www.hugedomains.com | Newtownards | 41 | Human-only 2026-10-14 |
| 160 | J.QUINN PLUMBING AND HEATING LTD www.hugedomains.com | Newry | 41 | Human-only 2026-10-02 |
| 161 | MARKRAM LIMITED markram.co.uk | Belfast | 41 | Human-only 2026-10-03 |
| 162 | MGM MECHANICAL SERVICES LIMITED www.hugedomains.com | Newry | 41 | Human-only 2026-10-03 |
| 163 | SJB PLUMBING LTD www.hugedomains.com | Newry | 41 | Human-only 2026-10-15 |
| 164 | VERY GOOD PLUMBING LTD verygoodplumbing.com | Belfast | 41 | Human-only 2026-10-16 |
| 165 | STEVEN GREER PLUMBING & HEATING LIMITED stevengreer.com | Dromore | 40 | Human-only 2026-10-05 |
| 166 | JOHN LYNN PLUMBING & HEATING LTD johnlynn.com | Cookstown | 39 | Human-only 2026-10-06 |
| 167 | O'REILLY MECHANICAL INSTALLATIONS LTD oreillymechanical.com | Kilkeel | 39 | Human-only 2026-10-13 |
| 168 | PW BOILERS LTD pwplumbing.com | Newtownards | 39 | Human-only 2026-10-09 |
| 169 | ALEXANDER PLUMBING AND HEATING LTD www.alexanderplumbing.com | Belfast | 38 | Human-only 2026-10-08 |
| 170 | A-MECH N.I. LIMITED mech.co.uk | Belfast | 36 | Human-only 2026-10-16 |
| 171 | WESTVENT LTD westvent.com | Londonderry | 36 | Human-only 2026-10-02 |
| 172 | GC M & E SERVICES LTD gc-services.co.uk | Newtownabbey | 34 | Invisible to machines 2026-10-05 |
| 173 | JAMES ROBB AND SON LIMITED jamesrobb.dev | Antrim | 34 | Invisible to machines 2026-10-10 |
| 174 | SJT PLUMBING LTD sjtplumbing.co.uk | Dungiven | 34 | Invisible to machines 2026-10-15 |
| 175 | BTK SERVICES LTD btkservices.com | Belfast | 32 | Invisible to machines 2026-10-08 |
| 176 | BESPOKE PLUMBING AND HEATING LIMITED bespokeplumbingheating.co.uk | Newtownabbey | 31 | Invisible to machines 2026-10-08 |
| 177 | C O'KANE PLUMBING LIMITED okaneplumbing.com | Limavady | 31 | Invisible to machines 2026-10-16 |
| 178 | DH MECHANICAL & VENTILATION LTD dhmechanical.com | Trillick | 31 | Invisible to machines 2026-10-12 |
| 179 | A1 PLUMBING LTD a1plumbing.co.uk | Newry | 30 | Invisible to machines 2026-10-10 |
| 180 | ENVIRO FIRE WATER & AIR LIMITED envirofire.co.uk | Newry | 30 | Invisible to machines 2026-10-07 |
| 181 | PLUMB GAS (N.I.) LTD plumbgas.co.uk | Newtownabbey | 30 | Invisible to machines 2026-10-14 |
| 182 | REFMEC LTD refmec.co.uk | Ballyclare | 30 | Invisible to machines 2026-10-14 |
| 183 | CTS PROJECTS LIMITED www.cts-projects.it | Upper Dromore Road | 29 | Invisible to machines 2026-10-03 |
| 184 | A & S MECHANICAL (N.I.) LTD mechanical.com | Magherafelt | 28 | Invisible to machines 2026-10-04 |
| 185 | C & A MECHANICAL LTD mechanical.com | Omagh | 28 | Invisible to machines 2026-10-07 |
| 186 | DRENCHED (NI) BATHROOMS & TILES LTD. drenchedni.com | Maghera | 28 | Invisible to machines 2026-10-04 |
| 187 | ECO PELLET LTD ecopellet.com | Newry | 28 | Invisible to machines 2026-10-07 |
| 188 | M & M MECHANICAL LTD mechanical.com | Craigavon | 28 | Invisible to machines 2026-10-12 |
| 189 | P & H SERVICES (MECHANICAL) LIMITED servicesmechanical.com | Coleraine | 28 | Invisible to machines 2026-10-02 |
| 190 | PRO SOLAR NI LIMITED prosolarni.co.uk | Downpatrick | 28 | Invisible to machines 2026-10-15 |
| 191 | S M P MECHANICAL LTD mechanical.com | Craigavon | 28 | Invisible to machines 2026-10-12 |
| 192 | SAC PLUMBING & HEATING LIMITED sacplumbing.com | Maghera | 28 | Invisible to machines 2026-10-01 |
| 193 | SOLAR NRG LIMITED solar-nrg.com | Belfast | 28 | Invisible to machines 2026-10-15 |
| 194 | W H G MECHANICAL LTD mechanical.com | Randalstown | 28 | Invisible to machines 2026-10-04 |
| 195 | GAIA SMART ENERGY (NI) LIMITED www.gaiasmart.com | Belfast | 27 | Invisible to machines 2026-10-14 |
| 196 | MATTHEW MCDOWELL HEATING & PLUMBING LTD matthewmcdowell.com | Newtownards | 25 | Invisible to machines 2026-10-08 |
| 197 | R & M MARTIN PLUMBING LTD martin-plumbing.com | Ballymena | 25 | Invisible to machines 2026-10-06 |
| 198 | JFM MECHANICAL LTD www.facebook.com | Coalisland | 24 | Invisible to machines 2026-10-13 |
| 199 | INDUSTRY PIPELINES LTD industrypipelines.com | Magherafelt | 22 | Invisible to machines 2026-10-11 |
| 200 | GREENVIEW GAS LTD greenviewgas.co.uk | Carryduff | 21 | Invisible to machines 2026-10-08 |
Placed by registered office postcode, which is not always where the work happens. Counties with fewer than 3 scored websites appear here rather than on a page of their own.