At O'Callaghan Construction, we offer comprehensive residential building services, specialising in new builds, house extensions, renovations, and home alterations throughout Cork City and County. Whether you're planning a new home build, adding more space, or making changes to your current layout, our experienced team is here to help from start to finish.
Expert construction for new builds, house extensions, renovations, and home alterations in Cork.
For new builds and larger extensions, you'll usually start with an architect or engineer to develop drawings and apply for planning permission. Smaller alterations may only need a simple design chat or none at all.
Once the design is approved (or agreed), detailed construction drawings are created. These help us give you an accurate costing, whether it's a full build or a smaller project.
We take over the full construction process - managing trades, materials, and timelines. Whether it's a full house or a few smart changes, we build it right.
After careful checks and finishing touches, we hand everything over clean, complete, and ready to enjoy - no stress, no surprises.
Do you have a residential building project in mind? Contact us to start your build with OCC Cork! Here to help.
Get in touchOur services include everything from complete new builds to smart, efficient home extensions. We also carry out high-quality renovations to update and improve existing homes, as well as minor alterations that make a big difference to how your space works.
We offer a reputable, friendly service that picks up from where your design and planning leave off - managing the construction phase and providing full project management right through to handover. If you need a structural engineer, we can include this as an additional service - covering sign-offs, and any required certifications throughout the build. It's a common requirement for extensions or some internal layout changes. If you're not sure, just ask us! We are here to help through all of your building stages.
At O'Callaghan Construction, we help homeowners across Cork carry out deep energy retrofits on their existing homes. A deep energy retrofit first looks at your existing home, from the roof to the walls and windows. Ventilation, your current heating system and current electricity usage are all considered. When a number of upgrades are applied in your deep energy retrofit, this maximises the outcome, meaning you get the most energy-efficient home possible. Ready to retrofit? Let's chat.
Thinking about building, extending, or renovating your home in Cork? We know there can be a lot of questions - from planning permission and pricing, to what we manage for you. Below, you'll find answers to the most common questions homeowners ask before starting a project. Get in touch no matter what stage you're at - we're here to help you every step of the way.
Do you have a residential building project in mind? Contact us to start your build with OCC Cork! Here to help.
Get in touch
A complex, high-performance passive house build in Crosshaven, delivering a dream home that generates more energy than it uses.