Quality-First Installations
We specialise in the quality of our installations, using trusted, high-performance window and door systems.
Family-Run
Local & Trusted
Who we are
A family business built on quality installations and word of mouth
The majority of our work is the result of customer recommendations and referrals. We treat every home as if it were our own — tidy, respectful and thorough from the first measure to the final clean-up — and we stand over the work long after the job is done.
Recommended & Referral-Led
Most of our work comes from referrals and repeat customers across Wicklow and South Dublin.
what we do
One local team for windows, doors and glazing
From a single replacement window to a full house of triple glazing, a new front door or a commercial shopfront — we measure, supply and fit it all, and we're an SEAI Registered and Palladio Approved installer.
A-rated uPVC and aluminium windows in double and triple glazing, made to measure.
Composite and insulated doors, including Palladio designs you can build online.
Slim-framed bi-fold and sliding doors that open your home up to the garden.
Office partitions, shopfronts, facades and commercial re-glazing, managed end to end.
our work
Homes we've transformed across Wicklow & Dublin
Full Window Replacement
Bray, Co. Wicklow
New Door & Porch
South Dublin
Aluminium Windows & Doors
Co. Wicklow
Windows & Composite Door
South Dublin
Whole-Home Upgrade
Bray, Co. Wicklow
SEAI
Registered Installer
Palladio
Approved Installer
Aluna
Aluminium Systems
Family-Run
& Referral-Led
Windows & doors, fitted by a family you can trust
Talk to a local, family-run team. Call or send a message and we'll come back to you.
Call Michael today
086 173 9010
why homeowners choose us
What you can expect
The same familiar, friendly team from the first measure to the final clean-up — people who know the area, take real pride in the work, and are still here if you need anything after the job is done.
Get in touchFamily-Run & Local
01
Quality-First Installations
02
After-Sales Support
03
Some FAQ
About us, answered
Yes. We're a long-established, small family business and we've been fitting windows and doors locally for decades. You deal with the family directly — from your first call with Michael through to the team who fit the job — and most of our work comes from neighbours and past customers passing our name on.
We are. We're a Registered SEAI Installer (Contractor ID 19529), so the windows and doors we fit can qualify for the SEAI Windows & Doors grant. We're also a Palladio Approved Installer and we fit Aluna aluminium systems — trusted, high-performance products we stand over.
We're based in Bray and cover Co. Wicklow, South Dublin and the surrounding areas. If you're not sure whether you're in our patch, just give Michael a call and we'll let you know straight away.
Yes — one team, start to finish. We measure up, supply the windows and doors, and fit them with our own installers. There's no handing you off to a separate crew, and we tidy up properly afterwards. If anything needs attention later, you call us and we look after it.
clients testimonial
Trusted by homeowners across Wicklow & Dublin
Iva
Verified Google review
Fantastic experience from start to finish. The team was incredibly fast, helpful and clearly took real pride in their work. The windows were installed with great care, and they even proactively swapped out a few that didn't meet their own high standards. Michael kept us in the loop every step of the process and made sure everything was completed to the highest standard. Highly recommend!
Siobhain Topping
Verified Google review
Fantastic service, a pleasure to deal with from the initial measuring up to the delivery of the large window I had installed. Work and installation was perfect. Very neat and tidy after, no mess. O'Sullivan did my aunt's house and I highly recommend them. When I'm getting the rest of the house done, there is nobody else I will be calling on.
Graeme Morrison
Verified Google review
I chose Paddy to install my triple glazing based on his excellent reputation, and I was not disappointed. The quote was fast and accurate, the price was competitive, and Paddy's guidance on my options was invaluable. Delivery time was perfect and his workers were a joy to have in our home. If you're after windows and doors, look no further.
Alan Kelly
Verified Google review
I had my windows all replaced and a new front door fitted by Paddy and his team. They were excellent to deal with and did a fantastic quality job. A pleasure to deal with, would highly recommend.
Pauline Mackin
Verified Google review
First class service from O'Sullivan Glazing. We got a new front door which I am delighted with. Very quick and clean. The two men who work for Paddy were polite and helpful. I can't recommend them enough. Thank you.
Thomas Q
Verified Google review
O'Sullivan Glazing are one of the best companies to deal with. Excellent service and no problems when following up any snags that may occur. I highly recommend them. Paddy, Michael and the crew, thanks for great service.
Alex Martin
Verified Google review
Michael was amazing! Came to just have a look at a leaky window. Stayed and fixed it, then fixed more! Went above and beyond. Thanks again!
talk with us