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BER rating

What is a Building Energy Rating (BER)

Building Energy Rating (BER) certificates provide an asset-based energy rating rather than an operational consumption rating, allowing prospective buyers or tenants to compare dwellings objectively on a like-for-like basis. Calculated energy consumption is based on consistent assumptions, such as standardized lighting requirements, fixed heating periods, and assumed occupancy levels. This method ensures comparability across different properties but may not reflect actual energy usage if occupants vary in their behavior.

In contrast, measured energy consumption reflects actual energy usage, often based on bills or monitored data, but can vary greatly depending on occupant behavior. While it provides an accurate representation of energy usage, it's challenging for prospective buyers or tenants to compare properties on a like-for-like basis.

A BER is calculated based on various factors using the Dwelling Energy Assessment Procedure (DEAP), which considers space and hot water heating, ventilation, and lighting. The calculation is independent of occupant behavior and is focused on the building's fabric and installed systems.

Factors affecting a BER include the age of construction, floor area, default values used for insulation and thermal performance, quality of windows and doors, efficiency of heating systems and controls, lighting fixtures, and presence of renewables. Providing documentation and certification for upgrades and renewables can positively impact the BER rating.

During a BER assessment, information such as construction type, dimensions, insulation levels, heating systems, and renewables is gathered by the assessor. The assessor may also take photos and request documentation to support the assessment.

Overall, a BER provides valuable insight into a property's energy performance and potential for improvement, helping homeowners, buyers, and tenants make informed decisions regarding energy efficiency.

BER rating: About

Why should I get a BER rating

What is a Building Energy Rating (BER)

Getting a Building Energy Rating (BER) assessment for your home has several important benefits. It's a legal requirement for new houses and properties up for sale or rent. Beyond that, it helps you understand how your home uses energy and where you can make improvements to save money. By improving insulation and upgrading heating systems, you can reduce drafts and save on heating bills. This not only makes your home more comfortable but also reduces its impact on the environment by cutting carbon emissions. A better BER rating can also make your property more attractive to buyers or renters. It provides transparency in the real estate market, allowing for fair comparisons with similar properties. Additionally, BER assessors can offer practical advice tailored to your home and suggest energy-efficient upgrades. Overall, a BER assessment helps you make informed decisions to improve your home's energy efficiency and value.

If your home has a BER rating of a B3 or greater, you can apply for a Green mortgage 

BER rating: About

What is a Green Mortgage

A green mortgage in Ireland functions similarly to a standard mortgage, where you borrow a sum to buy a property and make monthly payments with interest to repay the loan. The key features include receiving a discount off the lender's standard rate, resulting in cheaper mortgage payments, primarily due to the discounted interest rate. Additionally, mortgage cashback may be available at drawdown.


To qualify for a green mortgage, the property being purchased, built, or adapted must have a Building Energy Rating (BER) of B3 or higher. Eligibility requirements for a green mortgage align with those for a standard mortgage application, such as being an Irish resident over 18 years old. There are three pathways to qualify for a green mortgage: buying a home with a BER between B3 and A1, adapting a home to achieve a BER between B3 and A1, or building a house with a BER between B3 and A1. Five mortgage lenders in Ireland offer green mortgages: AIB, Bank of Ireland, EBS, Haven, and PTSB. Green mortgage rates vary among lenders, with options such as fixed-rate terms ranging from 1 to 10 years.


While there are benefits to green mortgages, including savings on interest rates, selling an energy-efficient home more readily, and reducing your carbon footprint, there are also drawbacks to consider, such as potentially cheaper non-green mortgage options, loss of eligibility for other discounts or cashback offers, and limited availability of green mortgages.


Ultimately, whether a green mortgage is worth it depends on individual circumstances and preferences, and it's essential to compare deals and consider factors such as fixed-rate terms and eligibility criteria before making a decision. If your home qualifies, exploring green mortgage options and seeking the best deal for your needs is recommended.

BER rating: About
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