BER Certificates for Apartments

Apartments make up a huge and growing portion of Dublin's housing stock, and they have specific BER characteristics that set them apart from houses. Whether you're an owner-occupier, a landlord, or a management company, here's everything you need to know about BER certs for apartments.

How Is an Apartment BER Different?

The fundamentals are the same, an SEAI-registered assessor surveys the property and calculates the energy rating, but apartments have several distinct characteristics that affect both the assessment process and the result.

Shared walls, floors, and ceilings. Unlike a detached or semi-detached house, an apartment typically shares most of its boundary with other heated spaces. This means less heat loss through the building fabric, which generally helps the BER rating. A mid-floor apartment with neighbours above, below, and on both sides loses heat primarily through its external wall and windows, a much smaller surface area than a house.

Electric heating is the big challenge. Many Dublin apartments, particularly those built during the 2000s boom in areas like the Docklands, Sandyford, Swords, and Blanchardstown, have electric storage heating or electric panel heaters. Electric heating scores poorly on BER assessments because the primary energy factor for grid electricity is significantly higher than for gas or oil. This is why you'll often see apartments in otherwise well-built modern blocks rating C or D, the heating system is dragging the rating down.

Smaller floor area. Apartments are assessed on a per-square-metre basis, just like houses. But because they're smaller, individual upgrades can have a proportionally larger impact on the rating. Replacing a few storage heaters with heat pump units in a 60m² apartment can shift the BER by two or more grades.

Typical Apartment BER Ratings in Dublin

Based on our experience across thousands of assessments, here's what we typically see for Dublin apartments. Modern apartments (2015+) with gas or heat pump heating usually achieve A3 to B2. Celtic Tiger-era apartments (2000–2010) with gas heating typically rate B3 to C2. Celtic Tiger-era apartments with electric storage heating commonly rate C3 to D2, sometimes worse. Older converted flats in period buildings (Rathmines, Drumcondra, etc.) often rate D to F depending on insulation and heating type.

Improving Your Apartment's BER

Replace electric storage heaters. If your apartment has storage heaters, switching to air-to-air heat pump units (split systems) is the single most impactful upgrade. Each unit costs roughly €1,500–€2,500 installed, and the BER improvement can be dramatic, often 2+ grades. These units also provide cooling in summer and are far more comfortable than storage heaters.

Upgrade lighting to LED. In a small apartment, lighting makes up a larger proportion of total energy use than in a house. Switching all lighting to LED is cheap and can noticeably improve your BER.

Improve windows. If your apartment has original single-glazed or early double-glazed windows, upgrading to A-rated glazing makes a significant difference. Check with your management company first, as window replacement in apartment blocks often requires approval to maintain a uniform appearance. The SEAI windows and doors grant of up to €3,000 applies to apartments.

For more upgrade options, see our complete guide to improving your BER rating, or use the SEAI grant calculator on HomeEnergyGuide.ie.

Access and Management Company Considerations

If your apartment is in a managed block, you may need to coordinate access with the management company, particularly for the assessor to inspect common areas or verify external wall insulation details. In practice, this is rarely an issue. We carry out apartment BER assessments regularly in managed buildings across Dublin and can work around any access requirements.

If you're a management company or landlord with multiple units in the same building, we can assess several apartments in a single visit, which is more efficient for everyone. Each apartment gets its own individual BER certificate, as required by law.

Landlords With Rental Apartments

If you're renting out an apartment, you need a valid BER certificate for each unit, the rating must appear in all property advertisements. Dublin's rental market has a very high proportion of apartments, and we assess rental apartments across every Dublin postal district on a weekly basis. See our guide to BER for landlords. Some older apartment buildings may qualify for BER exemptions for your full obligations. For commercial units in mixed-use buildings, visit CommercialBER.ie.