Good decisions start with knowing your building.

We bring building surveying, engineering and residential design together to help you make informed decisions about the place you live, the home you’re buying or the project you want to build.

Talk to our team

25+Years of experience

10,000+Reports completed

2–3 daysTypical report turnaround (working days)

4.8 / 5Rated on Google

OUR PRACTICE

From understanding what’s there to designing what comes next.

A buyer may need to know whether a defect warrants a closer look before signing. A homeowner may need to know what their site can accommodate before committing to a design. In both cases, we start with the property and the decision you need to make.

On an inspection, that means recording what we can see and explaining what deserves attention. On a design project, it means turning your brief into drawings and agreeing the support you need through planning and construction.

See the West Cavan project

Completed home designed by ONOR in West Cavan — ONOR PROJECT Completed home, West Cavan

OUR LEADERSHIP

Meet the directors.

Claire O’Neill

Managing Director · Registered Engineer, IEI

Claire has been a registered engineer for 27 years. As Managing Director of O’Neill O’Reilly & Associates, she oversees the practice’s work across building surveying, engineering reports, residential design and planning.

Her experience includes investigating building defects and structural concerns, as well as guiding residential projects through design and planning. She works with the team to turn technical findings into clear recommendations for clients.

Caoláinn O’Reilly

Director · Engineer

Caoláinn holds a master’s degree in Civil, Structural and Environmental Engineering from Trinity College Dublin. As a director, he oversees the work of ONOR’s Design & Planning team, from developing residential proposals to preparing planning submissions.

He also works with the surveying and engineering team, carrying out building surveys and preparing engineering reports. That site experience informs how he and the design team approach existing buildings, structural details and construction.

HOW WE WORK

What you can expect from us.

Agree the scope
Tell us about the property and what you need to decide. We’ll confirm the service, what it covers, availability and the fee.
Look closely
We inspect, assess or develop drawings for the agreed work. If something needs a separate investigation, we’ll explain what to follow up.
Explain the next step
We explain what the findings or drawings mean in practice, so you know what to raise with your solicitor, builder or planning team.

FIND THE RIGHT SERVICE

Where are you with your property?

We work across Dublin, the Midlands, the North East, Leinster and parts of Connacht. Share the Eircode and we’ll confirm whether we can help at your location.

Buying a propertyPre-purchase surveys Concerned about a defectEngineering reports Preparing for handoverSnag lists Planning to build or alter a homeDesign & Planning

Tell us what you’re working with.

Send us the address or Eircode and a brief note about what you need help with. We’ll guide you from there.

Get a quote