153 Google Reviews
Blanchardstown, Castleknock and Ongar estates are reaching the age where boilers and cylinders give out. We fix them, and we fix them fast.
No obligation. Fixed quote before any work starts.






Blanchardstown went from under two thousand people in 1966 to over seventy thousand by 2016. That growth came estate by estate, so the houses on any one road were built, plumbed and heated within a year or two of each other.
Cortech works these estates every week. RGI registered, fully insured and over 5 years in Dublin, we quote a fixed price before anything starts, whether the job is a repair or a full boiler replacement.
Six jobs account for most of our Dublin 15 call-outs, and most of them start with a boiler. Tell us what yours is doing.
Traced and repaired without lifting half the floor.
Combi faults, pump failures and no hot water fixed.
RGI-registered detection, made safe, then repaired.
Kitchen and bathroom blockages cleared and traced.
Drips, weak flow and full bathroom installations.
Annual boiler service with flue gas and CO checks.
Traced and repaired without lifting half the floor.
Combi faults, pump failures and no hot water fixed.
RGI-registered detection, made safe, then repaired.
Kitchen and bathroom blockages cleared and traced.
Drips, weak flow and full bathroom installations.
Annual boiler service with flue gas and CO checks.
Four build periods cover most of Dublin 15. Which one your estate belongs to decides what is likely to fail next, and we work on all four every week.
Newer does not mean trouble-free. Unvented cylinders, pressurised systems and sealed combis all need the right parts and the right pressure, and an estate full of them tends to need them at the same time.
Larger houses with several bathrooms and heavy hot water demand.
First-wave houses now on their second or third heating system.
2000s estates running pressurised systems and unvented cylinders.
Mid-period estates reaching boiler and cylinder replacement age.
Everything on this page is done in-house by RGI-registered plumbers. Tap any service to see the detail, or call and we will tell you what the job needs.
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EXCELLENT
Based on 190 reviews
Posted on Google![]()
michael daltonTrustindex verifies that the original source of the review is Google.
Great company I needed a radiator installed had two very nice young lads install it Graham and Leon both very polite and good at their job would highly recommend this company mickPosted on Google![]()
Shane O NeillTrustindex verifies that the original source of the review is Google.
Will definitely use again. Extremely professional. The job was arranged quickly after my first call. Very good communication from start to finish.Posted on Google![]()
Rachel PhillipsTrustindex verifies that the original source of the review is Google.
I had an emergency as my heating wouldn't turn on and no hot water,I ran cortech plumbing and they were out to me in half an hour and took them only five minutes to fix the problem,would recommend them to everyone,brilliant service,they also gave me a discount as I am a former customer.Posted on Google![]()
Patrick WheatleyTrustindex verifies that the original source of the review is Google.
Prompt,business like boiler service service,practical advice.Posted on Google![]()
Chris MothersillTrustindex verifies that the original source of the review is Google.
Friendly service fast and efficientPosted on Google![]()
Poliah PramilaTrustindex verifies that the original source of the review is Google.
Monday 14th September 2026. I am extremely happy with the service I received from Cortech Plumbing & Heating. My boiler was leaking and there was a strong smell of gas,which was very concerning and worrying as well. They responded quickly...very professional and reassuring...they identified and dealt with the problem efficiently. Honestly I really appreciated their prompt response... knowledgeable and excellent customer service.. They were reliable and friendly...They also make sure that everything was sorted accordingly in a proper way. I would highly recommend Cortech Plumbing & Heating to anyone looking for a trustworthy and professional staff worker... I extremely appreciated their excellent service from start to finish..... Thank you all the great excellent staff worker.... PramilaPosted on Google![]()
Georgina EastaughTrustindex verifies that the original source of the review is Google.
Massive thank you to Ben from Cortech who came for an emergency call out to find my wedding ring. Didn’t need any plumbing work thankfully as he found it in about 10 seconds by figuring out what had happened - a very logical approach. Left me feeling silly, but very grateful. Thanks so much!Posted on Google![]()
Sandra CarrTrustindex verifies that the original source of the review is Google.
Thank you so much for your fantastic work!! Ben is exceptional. Always comes out very fast after calling him. I’ve had him out a couple of times now and they are a great company to work with!Posted on Google![]()
Marian MillerTrustindex verifies that the original source of the review is Google.
Very happy with service. Very Customer friendly. Ben a very pleasant and polite young man. Very happy with service. Diagnosed an issue we were pleased to be made aware of. Definitely would recommend this Company.Posted on Google![]()
Mark CagneyTrustindex verifies that the original source of the review is Google.
I had a shower unit locked open with water flowing for a couple of hours and needed a call out. Found Cortech on Google and rang them about 9.30 am on a Friday morning. The service man, a really helpful guy called Ben was here in 40 mins and sorted the problem immediately. He also helped me find a company who had a replacement unit and parts. From my initial call, to job completed ( including help with finding replacement unit ) took 45 mins. The speed and efficiency of the service, plus the really pleasant manner in which I was dealt with was a breath of fresh air. I would highly recommend Cortech Plumbing.Verified by TrustindexTrustindex verified that these reviews were published on Cortech Plumbing's Google Business Profile. Learn more
You hear the full price before a tool comes out, and that number holds. Nothing is added once the job is under way.
We check the job and quote it at no cost.
The quote is the price, agreed before we begin.
Labour, parts and call-out listed, nothing added afterwards.
You hear the cost before anyone gets in the van.
We cover Dublin 15 and the areas around it. Choose yours to see the local page.
Tell us the estate and the age of the system. You get an RGI-registered plumber, a clear diagnosis and a fixed price before any work starts.
No obligation. Fixed quote before any work starts.