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★★★★★

153 Google Reviews

Plumber in Dublin 15

Blanchardstown, Castleknock and Ongar estates are reaching the age where boilers and cylinders give out. We fix them, and we fix them fast.

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Registered, insured and trusted across Dublin

Blanchardstown to Castleknock

Dublin 15 Estates Age Together

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.

What Goes Wrong Here

Catch It Before Winter

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.

Leaks Stopped Same Visit

Traced and repaired without lifting half the floor.

Heating Back On

Combi faults, pump failures and no hot water fixed.

Gas Made Safe First

RGI-registered detection, made safe, then repaired.

Drains Running Again

Kitchen and bathroom blockages cleared and traced.

Taps and Bathrooms Sorted

Drips, weak flow and full bathroom installations.

Serviced and Certified

Annual boiler service with flue gas and CO checks.

Tell us the make of the boiler and what it is doing, and we will tell you how urgent it is.

Estates We Work In

Know the Build Year First

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.

Castleknock Family Homes

Larger houses with several bathrooms and heavy hot water demand.

Blanchardstown 1970s Estates

First-wave houses now on their second or third heating system.

Ongar and Tyrrelstown Builds

2000s estates running pressurised systems and unvented cylinders.

Clonsilla and Hartstown Semis

Mid-period estates reaching boiler and cylinder replacement age.

What We Handle

Skip the Second Contractor

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.

Real Customers, Real Reviews

What Dublin Customers Say

EXCELLENT
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Based on 190 reviews
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michael dalton profile picture
michael dalton
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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 mick
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Shane O Neill profile picture
Shane O Neill
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Will definitely use again. Extremely professional. The job was arranged quickly after my first call. Very good communication from start to finish.
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Rachel Phillips profile picture
Rachel Phillips
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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.
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Patrick Wheatley profile picture
Patrick Wheatley
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Prompt,business like boiler service service,practical advice.
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Chris Mothersill profile picture
Chris Mothersill
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Friendly service fast and efficient
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Poliah Pramila profile picture
Poliah Pramila
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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.... Pramila
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Georgina Eastaugh profile picture
Georgina Eastaugh
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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!
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Sandra Carr profile picture
Sandra Carr
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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!
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Marian Miller profile picture
Marian Miller
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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.
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Mark Cagney profile picture
Mark Cagney
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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.
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Fixed Pricing

Know the Price First

You hear the full price before a tool comes out, and that number holds. Nothing is added once the job is under way.

Recent Work

See the Work for Yourself

Recent boiler, heating and plumbing jobs we have finished for homeowners and landlords around Dublin.

FAQ

Frequently Asked Questions

How long should a boiler last before replacing?

Industry guidance puts a gas boiler at roughly ten to fifteen years of reliable service, and plenty of Dublin 15 estates are now past that point because the houses went in together. Age alone does not decide it. Repeat breakdowns, rising bills and parts getting hard to source are the real signals. Call (01) 963 6090 and we will tell you honestly which side of the line yours is on.
Pressure loss in a combi usually comes from a small leak somewhere on the system, a failed expansion vessel or a leaking pressure relief valve. Topping it up every week hides the problem rather than fixing it, and it can damage the boiler over time. Call (01) 963 6090 and we will find where it is going.
Yes. Cortech works in the duplexes and apartment blocks around Ongar, Tyrrelstown and Littlepace, where systems are usually sealed and pressurised and the correct parts matter more than a general fix. Call (01) 963 6090 and tell us which block you are in.
Unvented cylinders store hot water at mains pressure, which is why newer Dublin 15 houses get strong flow upstairs with no tank in the attic. They hold pressurised parts and safety valves that need checking, so yes, they should be serviced. Cortech services them as part of a heating check. Call (01) 963 6090
Check which switch you used. Immersion heaters sit inside the cylinder and heat water on their own, while the boiler heats it through the system, and many Dublin 15 houses have both. Running the immersion when the boiler would do the job costs more. Call (01) 963 6090 if you are unsure which is doing what.
Yes, and it costs less than the alternative. Servicing catches small faults early, keeps the flue gas and carbon monoxide checks current, and most manufacturer warranties on newer boilers require it. Cortech services gas and oil boilers across Dublin 15. Call (01) 963 6090 to book one.
Get Started

Book a Dublin 15 Plumber

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.

Get a Quote

No obligation. Fixed quote before any work starts.