"Happy Customer"

Had a great experience. Door fitted by a knowledgeable and friendly man in one morning. Would recommend the service.

"Top marks! "

Exceptional service from initial contact to final fitting. Have used for three properties now and always first class communication and follow up where needed. Top marks for value also.

"Excellent Experience"

Excellent experience with a recent retrofit of windows and doors from Costello Windows. It was a please to deal with Breda, Derry and the team, with constant communication and interaction resulting in excellent fitting by John. We are delighted with the outcome and would highly recommend. Many thanks.

"Top class company to deal with."

We've just had a complete window and door refit, carried out by Costello Windows. I couldn't recommend them highly enough, they did an incredible job. From my first phone conversation with Hayden, through to measuring, manufacture and fitting, the process was seamless. Most importantly, it was exactly on my budget. There was a small issue, when the start date was rescheduled at short notice, but once the job is complete, you quickly forget all that. A job this big involves dust and lots of it, but Gerry and his team did all they could to keep it to a minimum. Afterwards, they removed all the old windows and doors off site and left the place as new. If you're thinking of changing your windows, give Costello Windows a call, I thoroughly recommend them.

"Excellent Service Fantastic staff. Well done Costelloe Windows"

Ordered a composite door from Costelloe windows. Absolutely delighted with their service. Breda the sales lady is a fabulous girl to deal with and also Brendan in manufacturing is a gentleman. Nothing was a problem. James the fitter did a great job and I could not recommend them highly enough. 100% an excellent job.
Gina Killarney

"The door was of very good quality & is…"

The door was of very good quality & is a very strong door.
I think it would be impossible for any intruder to get in to the house through the back door.

"Simply the Best...."

Placed my order with John in Feb 2025 for windows and doors and was delighted when I received a phone call 5 weeks later that Timmy & Michael would be coming to fit. The 2 men were a pleasure to deal with. They did a fantastic job in removing the old and in with the new. Everything was so neat and tidy after them and I am delighted that the house has been transformed. Thanks to Costelloe's

"Great job "

Lovely guys that installed our doors
They did a great job !
Shout out to Breda in the office for being so helpful!

"Excellent service"

Excellent service, arrived on schedule and fitting perfect.

"Great company to deal with from the…"

Great company to deal with from the quote to the fitting - the door was ready faster then expected which was great and the fitter was incredibly helpful & efficient