Choose O.N.S.

With over 20 years experience developing state-of-the-art residential and commercial properties, ONS Ireland is Ireland’s leading total construction specialist.

Expert Team

Our expert team – which handles all elements of construction from initial planning to construction and final fit-out and even sales – is entirely capable of meeting the needs of every client.

At ONS Ireland we dedicate ourselves to meticulously planning every development, ensuring we take into account the natural environments in which our construction developments are placed. All our homes are not only aesthetically pleasing, they are highly functional, conveniently located, finished to the highest of standards and wise investment opportunities.

Four expert divisions capable of handling all your needs:

O.N.S. Developments Ireland

Our expert division that specialises in large scale construction of residential and commercial developments – with an award winning record and over 2,500 housing units successfully completed we are the leading site development company in Ireland.

O.N.S. Ireland

The core of our company, here you will find an expert team with real experience in all aspects of project management. From planning to implementation, from fit-out to marketing and even final sale, with ONS you’re in safe hands.

ONS Direct

At ONS Ireland we’ve cut out the middle man allowing us to offer you a better, more personal service. Our expert auctioneering division has a well-earned reputation as one of Ireland’s leading property purchasing channels – be it residential, commercial or industrial.


Our dedicated Contracts Division works on behalf of our construction partners ensuring we not only meet, but exceed the requirements of all our partners.