Costello Windows Reviews 

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

Very happy with my new Sash windows the lads installing were exceptional clean and tidy and made sure it was right first time,price wise by far the best excellent product as well and couldn't be happier would highly recommended Costello windows.

Delighted with Costellos after a recent purchase and installation of a new front door. Fast, efficient, friendly, and hassle free. Would highly recommend! Thanks folks.

We are delighted with the service received from Costelloe Windows. The two fitters Gerry and Jack were a delight to work with. They fitted everything correctly, worked effeciently and cleaned up after them. I would highly recommend them for any doors and windows that would need replacing.
Anthony Fitzgerald

Excellent work, seamless install

Recently got my front abs my back doors fitted by costello windows. Was both delighted with the doors and the high level of service and big attention to detail by the fitters that installed my doors. I would highly recommend this company.

My overall experience with Costello windows was positive.
I had 3 x A rated doors fitted to improve my HLI.
Sales team were traditional, professional and friendly and I got a very competitive quote.
My only complaint was the communication and updates with manufacturing, as it took a little longer than promised.
However, the products were of the hightest quality, and as expected.
The install team were friendly flexible and efficient, and did a very good install, tidied up after themselves. Pedro and assistant was very helpful and aimed to please and took pride in their work and I am overall very satisfied with experience and recommend Costello windows.

The whole experience on the day of the door fitting was Efficient and professional.

Very happy with the service hayden in sales wos a pure gent to deal with windows delivered and fitted well ahead of schedule fitters were very professional did a great job and very tidy after service wos quick and professional would highly recommend this company to deal with