Premier Window Upgrades & Replacement Windows Dublin

Top-Quality Replacement Windows and Grants Assistance Dublin

Based on 33 reviews
Jana Hatilova
Jana Hatilova
I hire Os Holding for all my projects as they are very reliable, communication is great and the job is always done at the highest standard. Will definitely continue to work with them!
Sinead Kennedy
Sinead Kennedy
Big thanks to Vadim and team for our recent apartment bathroom renovation. Vadim was always available to answer any questions we had and offered us his guidance and advice whenever we needed it. We needed the work completed in 1 week as our kids were heading back to school. Vadim was true to his word and the job was done within the agreed timeframe. The team are so clean, no mess left anywhere. We are absolutely thrilled with our new bathroom, the quality of the workmanship is incredible. If you are thinking of getting OS Holding to help you renovate, don't wait, book now, they are fantastic. Thank you Vadim and co, we love our new bathroom. Best of luck with everything.
ravishing ric roo
ravishing ric roo
We recently relocated to a residence constructed in the 1960s, presenting challenges in terms of renovation, due to its concrete construction. Vadim and his team undertook the renovation of the upper-level bathroom with exceptional proficiency. The job entailed the complete dismantling of the former bathroom, followed by floor and wall tiling, incorporating a built-in bathtub and electric shower. Vadim and his team maintained constant accessibility for inquiries and updates on cost estimates, accommodating our evolving project. Subsequently, we extended the scope to include additional renovations in the lower-level bathroom and attic. As a result of the quality and fair pricing, we are contemplating further renovations to be completed by Vadim and his team. Delighted with the work done.
brendan gibson
brendan gibson
Attic conversion Vadim and his team did a good job. The team were very hard working and cleaned up at the end of every day. Vadim listened to my requests and we are very pleased with the end result and the space we have now. Thank you OS Holdings Team.
Bruno Quintella
Bruno Quintella
I'm happy to share my experience with OS Holding. They recently built a stunning attic stair and revamped the flooring on an old stair in my home. From the start, their team was professional and communicative, answering all my questions and keeping me informed. The craftsmanship they showcased is outstanding. The transformation of the old stair's flooring is equally impressive. The precision and skill they demonstrated are remarkable. Bruno!
Attic conversion. ⭐️ ⭐️ ⭐️ ⭐️ ⭐️ A fanatic company. We had the attic converted into two rooms. Vadim and guys worked over several weeks in our home and were professional, exceptionally organised and tidy (which was so Important with this type of job) and were brilliant to work with. They listened and gave great advice and did a fantastic job. Couldn’t recommend them highly enough.
Alexander Usovich
Alexander Usovich
These lads have been phenomenal; they took over a build after we had major problem with a previous builder. These guys took the big job at hand, and have basically done a full two story build for us. They are super professional, have a great team, working at the highest standards with the highest quality of work I've seen in Ireland. I couldn't recommend these people more, the work they have done is for life and we really appreciate all their help, also at an exceptional price and in great time, with their team. Really, really recommend.
akhil suresh
akhil suresh
If you are looking for getting your house renovation done, you dont have to look any further. Vadim and his team recently did the renovation of our living room and bathroom and they were simply excellent. Vadim came out for the quotation inspection very promptly. The quote was quite reasonable and he surprised us by sending the quote few mins after the home visit. This is when we had to chase other contractors for weeks simply to get a quote. Vadim was also able to start the work within days after we decided to go with OS holdings. Each day they came on time and would clean up the whole place before leaving. The work was also completed to our utmost satisfaction ahead of time.

Expert Home Window Upgrades Dublin

At OSBER, we specialise in providing top-tier replacement windows and comprehensive energy upgrades across Dublin.


Our expert team ensures that each installation enhances both the comfort and efficiency of your home. With OSBER, homeowners in Dublin, Kildare, Meath, and Wicklow can enjoy stylish, durable windows that not only complement the aesthetics of their homes but also offer significant energy savings.


We are adept at navigating grant applications, including those for replacement windows in Ireland, ensuring our customers can access financial aid seamlessly.


  • Tailored Solutions: Customised window replacements to fit the unique style and requirements of your home.
  • Energy Efficiency: Advanced technology in window insulation that reduces energy bills and enhances comfort.
  • SEAI Grant Assistance: Expert guidance on securing grants for new windows and doors, ensuring cost-effective upgrades.
  • Quick and Efficient Service: Minimal disruption with quick installation times, catered to suit your schedule.
  • Quality Materials: Use of high-grade materials for enhanced durability and performance.

Featured Technologies and Materials

The Optimal Time for Window Upgrades

Aligning your window upgrades with broader home improvement plans can maximise the benefits.


The best time for these upgrades is from April to October, when weather conditions are favourable, ensuring smoother installations and immediate improvements in home comfort as you prepare for the colder months.

OSBER’s efficient processes and skilled team minimise any disruption, making any time the right time to enhance your home.

Ready to enhance your home with OSBER’s premium window solutions? Contact us today for a free consultation and quote. Discover how our tailored, energy-efficient windows can transform your living space while reducing your energy costs.

Don’t miss out on the opportunity to improve your home’s comfort and value. Call now to learn more about our services and how we can assist you with the SEAI grant application process. Make the smart choice for your home with OSBER!


Frequently Asked Questions

OSBER provides a variety of window upgrade options, including energy-efficient double and triple-glazed windows, sound-reducing windows, and custom-designed frames to match your home’s aesthetic and functional needs.

Our window upgrades involve advanced technologies such as Low-E coatings, inert gas fills, and multiple pane configurations that help maintain consistent indoor temperatures, reduce energy consumption, and lower utility bills.

Absolutely! We offer a range of styles and materials to ensure your new windows blend seamlessly with your home’s existing design. Our team works closely with you to meet your specific preferences and needs.

The duration of window installation can vary depending on the scale and complexity of the project. However, OSBER is committed to efficiency and minimises disruption, typically completing installations within a day once onsite work begins.

Yes, OSBER assists customers in availing of SEAI grants, which can substantially offset the cost of upgrading to energy-efficient windows. Our team will guide you through the eligibility and application process.

The ideal time for window upgrades is between April and October, when weather conditions are optimal for installation. Planning your upgrades during this period ensures your home is ready for the colder months.

You can schedule a consultation by contacting us directly at 01-524-1644 or by visiting our website to request a callback. Our expert team will discuss your needs and how we can best serve you.

Yes, all of our window upgrades come with a comprehensive warranty that covers both the materials used and the workmanship, giving you peace of mind about the durability and quality of our installations.

Yes, our upgraded windows feature sound-reducing glazing that helps block external noise, enhancing the tranquillity of your indoor environment.

Our windows are designed to be low maintenance, requiring only regular cleaning and occasional checks to ensure they function optimally. We provide detailed maintenance guidelines with every installation.