Costello Windows Arvostelua 

Everything done in a timely manner. Fitter was punctual and professional. Very happy with new Front Door.

Recently had new windows and door installed.Excellent service from start to finish.My interaction with the office staff and installation crew was always so professional and curteous.Any issues or questions were promptly attended to.I am extremely pleased with my windows and door.Maria O Leary

John Sullivan arrived today and sorted the 3 doors. All working great now.

Very happy with our experience of getting two new doors fitted by Jerry and Jack. Professional service from start to finish. Would recommend.

The two men that fitted my French door and windows were the best,left the house and yard as they found it,,I rate top class

Ordered our windows few weeks later was told they ready so rang up to arrange fitting and was told they can all be fitted the next day ! Amazing service to be all fully fitted the following day , couldn’t be happier with the outcome , the 3 Brazilian lads who done it did a stunning job and was very meticulous to give the best finish . They cleared away all there stuff and left over waste and materials will definitely recommend and use them again

Excellent product. Very professional fitter.

I felt compelled to write this review because from start to finish I've had nothing but positive dealings with Costello Windows.
My first contact was with Hayden Costello, who I got in touch with after a friend of mine had recently had windows installed by the company and couldn't speak highly enough of them. From the very first phone call, Hayden was friendly, genuine and easy to deal with. He was always available when I had questions and, to be fair to him, he's still reachable now if I need anything.
One of the biggest reasons we chose Costello Windows was that they were able to beat every other quote we received, in some cases by €5,000–€6,000. On top of that, they were the only company that could give us exactly what we wanted. We wanted apex windows, a full stable door and a 3-fold bi-folding door. Other companies were humming and hawing about whether it could be done, but with Costello Windows the answer was simply "yes" every time.
When it came to installation, they turned up exactly when they said they would. Pedro, his father and John arrived to do the fitting and I couldn't fault them. Their workmanship on our new build was excellent and they were always polite, courteous, tidy and on time. It's clear they take pride in their work.
A couple of months later, two window handles became stiff and one broke. These things can happen, so I rang the office and spoke with Amelia in reception. I have to say she was incredibly nice to deal with. She was understanding, apologetic and went out of her way to help get the issue sorted quickly.
She arranged for a service visit and John, who has been with Costello Windows for over 20 years, came back out. Once again, he was friendly, professional and had everything fixed in no time at all.
What really stood out to me throughout the whole experience was the people. Hayden, Amelia, John, Pedro and Pedro's father were all a pleasure to deal with. They're genuinely nice people and excellent ambassadors for the company. To be honest, if I met any of them in the pub I'd happily sit down for a pint and a chat.
We had 13 triple-glazed French opening windows fitted in various sizes, along with a front door with side panels, a green stable back door, two large apex windows and a 3-metre-wide bi-folding door. The quality is fantastic and we're absolutely delighted with how everything looks.
Costello also have a lovely showroom in County Limerick where you can see their products, and it's great to see that the windows and doors are manufactured locally on site.
If I was doing anything again in the future involving windows or doors, Costello Windows would be my first phone call without hesitation. I would have no problem recommending them to anyone.

I ordered a front door from this company. Their sales support is excellent. The door was installed within the 8 week timeline. The installer was very pleasant and efficient. He left the premises very clean when the install was complete. The door is exactly as described on the website, beautifully finished. I would highly recommend this company to anyone wanting to replace their windows or doors.

Great service, smooth process.
From the initial contact to visit the showroom to the actual installation of our new front door and frame the whole process was easy and ran smoothly.
All the staff were friendly, approachable and helpful.
There was a wide ranging choice of products and we were able to replace our door with like for like.
Would definitely recommend Costello Windows and will be using them again in the future
Mike and Debbie
July 2026

The fitter arrived on time, and we found him polite, professional and he did an excellent job. We are very happy with our choice.

We went with Costello's as they had the best value for what we wanted. The window and doors arrived within the given timeline. Jerry and his two colleagues were gentlemen and a really genuine fella who went out of his way to help and advise us. A professional at his job and someone you would want to install your windows and doors no messing all business. Very happy with the post install plastering all cracks on reveals finished well. Con and Susan

I absolutely love my new windows and doors. The service was great from start to finish. I cannot say enough about the guys who installed them. They worked so long and hard in the extreme heat. They were so clean and the finish was really good. If you're thinking of changing your windows and doors, I would highly recommend costello windows.

Windows where delivered within the time line given.
The two men who installed my windows were very pleasant to talk to and did a good clean job.

Very effective work, gerry and jack very professional very happy when end result

Better value and faster than any other window company I contacted. I have used them twice now and the fitters on both occasions were excellent. Quick and efficient, and did a great tidy up afterwards.

We had Gerry and Jack fit our whole house with new windows and doors.. great lads.. very professional, very tidy and after they had left you wouldnt even know they had even been here. Would recommend 👌

It was the after service. I contacted Emelia and she sorted everything. She was a pleasure to talk to and deal with. Lovely lady. I would highly recommend Costello Windows. P J Noonan.

I recently had a new door fitted and I’m extremely pleased with the result. The workmanship was excellent, and the installation was completed to a very high standard. The fitters were professional, punctual, and left everything clean and tidy when the job was finished.

I would like to express my sincere appreciation towards emelia
The assistance she
provided today was truly exceptional she was extremely helpful friendly and very polite when it came to handling my enquiry she did it with outstanding professionalism, efficiency, and genuine care. Her prompt and knowledgeable assistance it
made the entire experience seamless and exceeded all expectations.
It was exceptional full of professionalism, outstanding communication, and remarkable dedication demonstrated by Emelia Costello while handling my enquiry through customer services throughout the entire process, she was incredibly attentive, knowledgeable, courteous, and efficient, taking the time to thoroughly address my enquire with patience and genuine care, while ensuring that every question was answered clearly and comprehensively, ultimately providing a seamless, reassuring, and truly exemplary customer experience it had reflected the highest standards of service excellence