What is a NDBER?

Non-Domestic Building Energy Rating (NDBER) is a rating system used to assess the energy performance of non-domestic buildings in Ireland. A non-domestic building is a building that is not used for residential purposes for example, offices, schools, hospitals etc. A BER (Building Energy Rating) indicates the energy performance of a building. The BER certificate shows the annual primary energy consumption and carbon dioxide emissions associated with space heating, water heating, ventilation, lighting, and any related pumps or fans. These annual energy‑use and emissions figures are estimates and are not based on actual measured energy consumption or emissions data.  

Requirements for a NDBER

A BER certificate is legally required in Ireland for all non‑domestic buildings when they are constructed, sold, or rented. This obligation promotes transparency in the property market and enables prospective buyers or tenants to make informed choices based on a building’s energy performance.   

Benefits of a NDBER

Reduced energy use

A BER assessment can highlight opportunities to reduce energy use, helping you identify where improvements will have the greatest impact. Enhancing your building’s energy efficiency can lower day‑to‑day operating costs while also reducing its overall carbon footprint.

Market Attraction

An energy‑efficient building is often more attractive to the market, allowing owners to achieve higher rental values and stronger sale prices. As sustainability becomes a key priority for businesses and investors, energy ratings are playing an increasingly influential role in property decisions.

Strengthened reputation

Demonstrating a strong commitment to energy efficiency and sustainability can also strengthen your organisation’s reputation, helping you stand out to environmentally conscious clients, customers, and stakeholders.  

Our experienced assessors will follow the NEAP (Non-Domestic Energy Assessment Procedure) methodology, Irelands official method for calculating BER ratings in non-domestic buildings. More information on NEAP can be found here.  

Why choose Tipperary Energy Agency?

25+ Years Delivering Ireland's Energy Transition  

Tipperary Energy Agency is a not-for-profit social enterprise founded in 1998. We have been at the forefront of energy efficiency and retrofit in Ireland ever since, working with local authorities, communities, businesses, and the public sector across the country.  

25+ Years of Experience

Over two decades supporting Ireland's transition to sustainable energy use.

25+ Years of Experience

Over two decades supporting Ireland's transition to sustainable energy use.

40+ European Projects

Successfully completed more than 40 national and EU research and demonstration projects

40+ European Projects

Successfully completed more than 40 national and EU research and demonstration projects

€1.4M Savings Delivered

Helped Tipperary County Council alone achieve over €1.4M in energy cost savings.

€1.4M Savings Delivered

Helped Tipperary County Council alone achieve over €1.4M in energy cost savings.

SEAI Registered Auditors

Our auditors are SEAI-registered Certified Energy Managers (CEMs), meeting all statutory requirements.

SEAI Registered Auditors

Our auditors are SEAI-registered Certified Energy Managers (CEMs), meeting all statutory requirements.

Frequently Asked Questions

How often do I need to renew my BER certificate?

You must renew your BER certificate every 10 years, provided no changes are made to the building that would impact its energy performance. If changes are made, you must update your BER. 

What is the difference between DEC and BER?

A Display Energy Certificate (DEC) is based on the building’s actual, measured energy consumption, covering both regulated and unregulated energy uses. In contrast, a Building Energy Rating (BER) is calculated from the building’s predicted energy performance and includes only regulated energy. 

Regulated energy is energy that is essential to the buildings core function and typically includes heating, cooling, ventilation systems, hot water production and fixed lighting. Unregulated energy is energy use that is not controlled by building regulations and depends on occupant behaviour, equipment choices and operational patterns.

Speak to an expert

Looking for the right solution for your facility? Contact us today to discuss your needs and see how we can support your goals.