At O'Neill O'Reilly and Associates, we bring 26 years of experience delivering innovative, sustainable designs with a focus on quality and functionality. Our services include architectural design, expert pre-purchase property surveys, and planning permission support—helping clients make informed decisions with ease. Through precision, collaboration, and attention to detail, we turn ideas into exceptional, practical spaces.

Pre-Purchase Surveys - Planning Permission

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Featured Services

Planning Permission

We handle all aspects of planning application, from drawings to submissions.

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Pre-Purchase Surveys

Detailed structural surveys to protect your investment before you buy.

At O’Neill O’Reilly & Associates, Our services are available throughout Midlands, North East, and parts of Leinster and Connacht.

Areas Served

Laois

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Wicklow

Louth

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Sligo

Meath

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Leitrim

Westmeath

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Offaly

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Monaghan

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Longford

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Kildare

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Cavan

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Dublin

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Roscommon

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Carlow

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Not sure if we can covor your area?

Meet The Team

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Claire O'Neill

Managing Director

Registered Engineer, IEI

Claire brings over 26 years of leadership and engineering expertise to her role as Managing Director. As a long term member of Engineers Ireland, she is known for her strategic vision, attention to detail, and commitment to delivering the highest standards in engineering consultancy. Claire plays a key role in client engagement, project oversight, and guiding the overall direction of the company.

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Caoláinn O'Reilly

Director

Registered Engineer, IEI

Caolánn is a Registered Engineer with Engineers Ireland, specialising in project delivery and technical innovation. As Director, he combines hands-on engineering knowledge with a forward-thinking approach to problem-solving. Caolánn is deeply involved in project coordination, structural assessments, and ensuring efficient, client-focused outcomes.

Why Choose O’Neill O’Reilly and Associates?

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Trusted Engineers, Transparent Pricing, Fast Turnaround.

Registered Engineers - IEI Certified

2 Working Day Turnaround

Fixed Pricing - No Suprises

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Contact us

Ready to get started with O’Neill O’Reilly Associates? Fill out your details, and one of our team members will be in touch shortly to discuss your project. We look forward to helping you bring your plans to life — let’s build something great together.