About O'Sullivan Glazing The family behind every fit We're a long-established, small family business specialising in the quality of our installations. For decades the vast majority of our work has been carried out locally — most of it for neighbours who passed our name on — with a strong emphasis on customer satisfaction and after-sales support. 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. We specialise in the quality of our installations, using trusted, high-performance window and door systems. Most of our work comes from referrals and repeat customers across Wicklow and South Dublin.

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. Talk to a local, family-run team.