Building Energy Rating
What is a BER?
A simple, EU-standard rating that tells you how energy-efficient a home is, and what it'll likely cost to heat and run.
A1 is the most efficient (lowest energy bills). G is the least efficient. Most Irish homes built before 2006 fall into the C–E range.
The basics
How it's measured.
A Building Energy Rating (BER) is an indicator of a home's energy performance. It covers space heating, water heating, ventilation, and lighting, all calculated against standard occupancy assumptions. Insulation levels are particularly significant: they can dramatically shift the rating.
Think of it like the energy label on a fridge or washing machine. The A–G scale runs from most efficient (A1) to least efficient (G), and A-rated homes typically come with the lowest energy bills.
The image alongside is an official sample BER certificate from SEAI: what you'll receive at the end of an assessment.
When you need one
Selling, renting, or upgrading.
Since January 2009, every home offered for sale or rent in Ireland must have a valid BER certificate. Whether you're a buyer, a tenant, or a landlord, you have the right to ask for the cert before a deal goes ahead.
FAQ
Common questions.
Why do I need a BER certificate?
A BER is legally required when selling or renting a home in Ireland. It's also required to claim SEAI grants for energy upgrades, and to show new builds and major renovations meet energy performance standards. In short, it's part of just about every property transaction in Ireland today.
How long does a BER certificate last?
BER certificates are valid for 10 years from the date of issue.
What happens during the BER assessment?
The on-site visit takes about an hour. I'll need access to all rooms and the attic if applicable, and a few documents in advance: a recent ESB bill (with MPRN), the property's original construction date, any plans/specs/photos you have, and details of any upgrades such as a new boiler, added insulation, or a wood-burning stove.
How is a BER calculated?
BER ratings are calculated using the SEAI's official DEAP software. It considers the surface area of floors, walls, and ceilings; insulation levels; U-values of windows and doors; and any renewable energy sources like heat pumps, solar thermal, or solar PV. The output is the BER certificate plus an Advisory Report with suggested upgrades.
Ready when you are
Get your BER assessment booked.
Honest pricing, fast turnaround, fully SEAI-registered.