Address: Unit 3, Churchtown Business Park, Churchtown, Dublin 14 Phone: +353 1 298 3000 Email:

Our People

Our People are amongst the most experienced in the industry and all have degrees in either Engineering or Architectural Technology.

Harry Lewis BA.BAI MIEI - Director

Harry is a cofounder of Commercial Energy Ratings Ltd and has over 30 years experience in engineering and management, including large construction projects and management of multi million euro energy budgets. Harry is responsible for the overall management of the company, please contact Harry for all commercial quotations and for any technical advice that you may require.

Liam Cullen - MIEI Land Mapping Engineer & Registered BER Assessor

Liam has over 30 years experience working in an architectural and engineering practice and is our principal land mapping engineer. Liam leads the service delivery of the mapping function and his all round Engineering experience and many years experience of producing land registry compliant and lease maps mean that he can complete all mapping assignments from the simplest to the most complex.

Brendan Boyle - BA Hons Arch MCIAT & Registered BER Assessor

Brendan has 15 years experience as an architectural technician and BER Assessor and specialises in BER Certs and is also an established Land Registry Mapping Engineer. Brendan has completed projects for some of the largest hotels, nursing homes and office buildings & datacentres in Ireland, getting involved at the design stage and remaining with the project until completion.

Seán Coffey - BSc (Hons) MIEI & Registered BER Assessor

Seán has several years post graduate experience working on a variety of building regulation compliance and BER certification projects. Seán is also a registered heat pump technical assessor with SEAI.

Ronan Cadden - BSC (Hons) Energy Systems Engineering, MIEI & Registered NSAI Airtightness Engineer

Ronan has extensive experience in conducting airtightness, ventilation, fire integrity and smoke testing on numerous buildings throughout Ireland and has also recently added BER certification to his skillset.

Janet Martin - Office Manager

Janet looks after customer contact and office administration. Janet has many years experience running our busy office after previously working in advertising, marketing and real estate. Please contact her for Residential BER’s, Heat pump technical assessments, and Land Mapping quotations or to schedule a survey for a BER or Land Map.