Building & Civil Engineering Contractors
Construction & civil engineering, delivered to last.
O’Neill of Clonoe Ltd delivers commercial, civic and community projects across Northern Ireland and the Republic of Ireland – on scale, on quality and of course on time.
O'Neill of Clonoe Ltd
A track record built site by site, across the island of Ireland.
O’Neill of Clonoe takes pride in delivering high-quality construction and civil engineering projects across Northern Ireland and the Republic of Ireland.
From vehicle showrooms and retail units to GAA clubhouses and church halls, our teams bring the same standard of finish to every job.
We work directly with commercial clients, councils and community groups to deliver projects on scale, on quality and on professional finish – from groundworks through to handover.

O'Neill of Clonoe
Specialising in the Construction of...

Manufacturing Facilities
O’Neill of Clonoe Ltd has extensive experience in the construction of modern manufacturing facilities designed around the specific operational needs of each client.
From large-scale production environments to specialist manufacturing premises, we deliver robust, practical buildings that provide the space, infrastructure and flexibility required for efficient day-to-day operations.

Industrial & Production Plants
Our experience in industrial construction extends to large-scale production plants and complex industrial developments.
We understand the importance of creating facilities that can accommodate heavy-duty operations, specialist equipment, production processes and future expansion, while maintaining high standards of construction, safety and functionality.

Processing & Assembly Factories
O’Neill of Clonoe Ltd delivers purpose-built processing and assembly facilities tailored to the requirements of modern manufacturing businesses.
We work closely with clients and project teams to ensure buildings provide efficient production layouts, appropriate working environments and the infrastructure required to support specialist processing and assembly operations.

Bespoke Industrial Factories
Every industrial business has different requirements, which is why O’Neill of Clonoe Ltd specialises in delivering bespoke factory developments.
From the initial construction through to specialist internal requirements and associated external works, we create facilities designed around the individual processes, equipment, workforce and future ambitions of each client.

Commercial & industrial Factories
With experience across both commercial and industrial construction, O’Neill of Clonoe Ltd delivers high-quality factory developments for businesses throughout Northern Ireland and the Republic of Ireland.
Whether constructing a new facility, extending an existing operation or developing a complete industrial site, our focus remains on quality workmanship, professional project management and reliable delivery — on scale, on quality and, of course, on time.

Building Maintenance & Refurbishment
O’Neill of Clonoe Ltd provides comprehensive building maintenance and refurbishment services for commercial and industrial clients across Northern Ireland. As a trusted maintenance provider to Terex GB Ltd, McCloskey International Ltd and Donnelly Group, we are committed to delivering responsive, high-quality solutions tailored to the needs of each client.
Our experience covers all aspects of maintenance work, from minor repairs and planned maintenance programmes through to complete refurbishments, factory extensions and showroom developments.
Portfolio
A closer look at the projects we deliver.
WHAT WE DO
Building & Civil Engineering Services
Commercial construction is at the heart of the business, with the team delivering dependable, carefully managed solutions tailored to the operational and practical requirements of each client.
This is supported by extensive experience in civil engineering, council and community projects, and planned and responsive maintenance work.
The primary focus of our work is constructing large scale commercial portal frame steel buildings with all associated cladding, grounds works, building works and fencing etc.
O’Neill of Clonoe have a vast array of plant and equipment at their disposal to carry out ground works including manholes, sewer connections, services trenches, muck shifting, foundations works and concrete works including structure and retaining walls. All plant is manned by fully trained, competent and CITB approved licensed operators.
O’Neill of Clonoe Ltd have been working alongside Councils & Community organisations in Northern Ireland for over 50 years carrying out a wide range of works from new builds, extensions and alterations to full renovations on live sites working together with clients to keep disruption to a minimum.
Building Maintenance & Refurbishment
We are a maintenance provider to Terex GB Ltd, McCloskey International Ltd & Donnelly Group and are dedicated to meeting all requirements covering all aspects from minor repairs to full refurbishments and factory/showroom extensions.