Business Details
33 Years
experience
Emergency
services
Trusted Building Maintenance & Renewable Energy Solutions
Established in 1993 by Hugh and Anne McWilliams, H & A Mechanical Services has evolved from a small mechanical services provider into a multidisciplinary organisation employing over 200 professionals. Our journey has been defined by a commitment to innovation, quality, and client-centric solutions across mechanical, electrical, renewable energy, and building maintenance sectors. With offices in Draperstown, Derry City, Mallusk, and Clane, we deliver nationwide coverage across Ireland, serving private homeowners, social housing providers, and commercial clients. Our ISO 9001, 14001, and 18001 accreditations underscore our dedication to operational excellence, environmental responsibility, and safety. We prioritise direct client engagement to understand unique needs, ensuring projects are executed efficiently from design to maintenance.Our in-house expertise eliminates reliance on third-party contractors, providing seamless service continuity. Over three decades, we have completed thousands of installations, maintenance contracts, and renewable energy projects, earning trust through reliability and transparency. Our teams technical proficiency, combined with a family-run ethos, ensures every project reflects our core values of honesty, integrity, and professionalism. As industry leaders in sustainable solutions, we remain at the forefront of emerging technologies, including EV charging infrastructure and solar energy systems. This enduring focus on innovation and client satisfaction positions us as a trusted partner for residential, commercial, and public sector clients seeking dependable, future-ready services.
Services
Mechanical Services
Electrical Services
Renewable Energy Solutions
Building Maintenance
Social Housing Projects
EV Charge Points
LED Upgrades
Gas Boiler Installations
Solar PV Systems
Disabled Adaptations
Details
- Year established: 1993
Highlights and features
- We provide end-to-end services from design to maintenance under one roof
- Our ISO 9001-certified quality management system ensures consistent excellence
- 24/7 call centre supports 365-day response and preventative maintenance contracts
- Accredited MCS Installer for renewable energy projects across Ireland
- Over 30 years of experience serving private, social housing, and commercial sectors
Associations and certifications
- ISO 9001
- ISO 14001
- ISO 18001
- Financial Conduct Authority
What people say
Professional and efficient service
Completed work with minimal disruption
Highly skilled and courteous engineers
Excellent after-sales support
Competitive pricing with quality results
Services
Mechanical Services
H & A Mechanical Services delivers comprehensive mechanical services including heating system design, installation, and maintenance. Our accredited engineers specialise in domestic and commercial gas, oil, and plumbing systems, ensuring safe, efficient solutions. With in-house expertise, we manage projects from initial consultation to ongoing maintenance, prioritising client needs and regulatory compliance.
Electrical Services
Our electrical division provides planned maintenance, LED lighting upgrades, and EV charging point installations. Certified professionals deliver tailored solutions for residential, retail, and industrial clients. Services include system audits, fault diagnosis, and compliance testing, supported by 365-day response availability to minimise operational disruption for businesses and homeowners.
Renewable Energy Solutions
As MCS-accredited installers, we implement solar PV, air source heat pumps, and wind energy systems. Our renewable specialists assess client requirements to design cost-effective, eco-friendly solutions. Projects integrate seamlessly with existing infrastructure, reducing carbon footprints while maintaining system reliability and performance across domestic and commercial properties.
Building Maintenance
We offer full-spectrum building maintenance contracts including emergency repairs, heating upgrades, and external cyclical works. Our dedicated call centre coordinates rapid response teams across Ireland, supporting housing associations, local authorities, and private clients. Services extend to adaptations, kitchen replacements, and compliance-driven maintenance programmes for social housing providers.
Social Housing Projects
H&A executes multi-trade projects for social housing providers across Ireland, including heating upgrades and kitchen replacements. Our approach combines value engineering with strict adherence to grant schemes like the Affordable Warmth Programme. With depot-based teams in Northern Ireland and ROI, we deliver large-scale programmes while maintaining tenant-focused service standards through customer care-trained personnel.
People
Hugh McWilliams
Founder
Co-founder of H & A Mechanical Services in 1993, Hugh McWilliams established the company's family-run ethos and commitment to quality. His leadership shaped the business's expansion into renewable energy and nationwide maintenance contracts, maintaining a focus on client relationships and technical excellence.
Anne McWilliams
Founder
As co-founder, Anne McWilliams has been instrumental in developing H & A Mechanical Services's customer-centric approach. Her strategic vision contributed to the company's diversification into electrical services and social housing projects, ensuring sustained growth while preserving core values of integrity and professionalism.
Martin Collins
Contracts Director
Martin Collins, 2025 Outstanding Contributor award recipient, oversees major project delivery at H & A Mechanical Services. With decades of industry experience, he manages complex contracts across commercial and social housing sectors, ensuring adherence to quality standards and client expectations.
Questions
What areas do you serve?
We operate nationwide across Northern Ireland and the Republic of Ireland, with depots in Draperstown, Mallusk, and Clane providing localised support for domestic and commercial clients.
Do you offer emergency repair services?
Yes, our dedicated call centre provides 365-day response maintenance for heating, electrical, and building systems, with rapid deployment teams available across our service areas.
Can I get financing for home improvements?
We offer 0% finance options for natural gas boiler installations and renewable energy systems, making sustainable upgrades more accessible for homeowners through flexible payment plans.
Are your engineers certified?
All our technicians hold relevant industry accreditations including Gas Safe registration, electrical certifications, and MCS accreditation for renewable energy installations, ensuring compliance with safety and quality standards.
How do you handle social housing contracts?
We deliver multi-element projects for housing associations and local authorities, including heating upgrades and kitchen replacements. Our dedicated teams follow strict compliance protocols while maintaining tenant-focused service delivery through customer care training.
What renewable energy services do you provide?
We install and maintain solar PV systems, air source heat pumps, and EV charging infrastructure. As MCS-certified installers, we ensure all renewable projects meet technical and safety standards for domestic and commercial properties.
