SEAI Study – Energy Efficiency Boosts Home Values 2.7% Per BER Grade

Energy Efficiency Boosts Irish Home Values by 2.7% Per BER Grade – New SEAI Study

If you are planning to sell your home in the next 5 to 10 years, new research from the Sustainable Energy Authority of Ireland (SEAI) has quantified exactly how much energy efficiency upgrades are worth: every step up the Building Energy Rating (BER) scale adds an average of 2.7 per cent to your home's sale price.

Released on 17 August 2026, the study analysed nearly 50,000 actual home sales during 2023 and 2024, using final sale prices rather than asking prices. The findings are clear: Irish homebuyers are willing to pay significantly more for energy-efficient homes, and the effect is strongest in rural Ireland, where each BER improvement adds 4.7 per cent to property value.

For homeowners considering solar panels, insulation or heat pumps, this research provides official proof that energy upgrades are not just about cutting bills, they are also smart property investments.

Key Findings from the SEAI Study

The SEAI analysis, conducted in partnership with MyHome.ie, examined how BER ratings affect final sale prices across Ireland. Here is what they found:

National Average: 2.7% Increase Per BER Grade

Each step up the 15-point BER scale (which was in use until May 2026) is associated with an average 2.7 per cent increase in a typical Irish home's sale price.

For a home worth €350,000, moving from a C3 to a C2 rating would add approximately €9,450 to the sale price. Moving two grades (C3 to C1) would add €18,900.

Rural Homes See the Biggest Boost: 4.7% Per Grade

Rural properties benefit most from energy efficiency improvements. Each BER upgrade in rural Ireland is linked to an average 4.7 per cent increase in value—nearly double the national average.

For a rural home worth €300,000, moving from B3 to B2 would add approximately €14,100.

Houses vs Apartments

• Houses: 2.8 per cent average uplift per BER grade
• Apartments: 2.2 per cent average uplift per BER grade

Urban vs Dublin

• Urban areas outside Dublin: 2.7 per cent uplift per BER grade
• Urban Dublin: 1.7 per cent uplift per BER grade

The comparatively lower uplift in Dublin may reflect the greater influence of other buyer priorities in the capital, such as location, space and proximity to amenities. However, the research shows that BER improvements still translate into meaningful euro gains even in competitive Dublin markets.

Why Are Buyers Paying More for Energy-Efficient Homes?

According to SEAI, homebuyers are increasingly valuing three key benefits of energy-efficient properties:

1. Lower and Predictable Energy Bills

At the time of writing September 2026, average Irish electricity bills are €1,729 per year, 70 per cent higher than pre-2022 levels. Homes with better BER ratings use less energy for heating, hot water and electricity, translating to savings of €500 to €1,500 per year depending on the property.

Buyers are factoring these savings into their purchase decisions, effectively capitalising future bill reductions into today's sale price.

2. Warmer, More Comfortable Homes

Energy-efficient homes are better insulated and draughtproofed, maintaining consistent temperatures year-round. SEAI-administered upgrade programmes have documented improvements in comfort and health, particularly for vulnerable households.

3. Access to Green Mortgages

Many Irish lenders now offer green mortgages for homes rated B2 or higher, with lower interest rates (typically 0.1 to 0.25 per cent below standard rates). For a €300,000 mortgage over 25 years, a 0.2 per cent rate reduction saves approximately €9,000 in total interest.

Buyers purchasing energy-efficient homes can access these better rates, making higher purchase prices more affordable.

How Solar Panels Boost Your BER Rating and Property Value

Solar panels are one of the fastest and most cost-effective ways to improve your BER rating. Here is why:

BER Rating Improvements from Solar

Installing solar panels typically improves your BER rating by 1 to 2 grades, depending on your starting rating and system size.

For example:

• C3 to C1 or B3: A typical 5 kWp solar system (10 to 12 panels)
• B3 to B2 or B1: Solar plus battery storage or solar plus heat pump

Read our guide: Solar and BER Ratings: Boosting Your Home's Value

Property Value Increase from Solar

Using the SEAI study's findings, a 2-grade BER improvement from solar panels would add:

*Figures based on SEAI study (August 2026): 2.7% increase per BER grade nationally.

In rural areas (4.7 per cent per grade), the increase is even higher:

*Figures based on SEAI study (August 2026): 4.7% increase per BER grade in rural Ireland.

Solar System Costs vs Property Value Gains

A typical 5 kWp solar system costs €6,000 to €6,500 after the €1,800 SEAI grant (September 2026). If that system improves your BER by 2 grades, the property value increase (€16,200 to €27,000) exceeds the system cost by a factor of 2.5 to 4 times.

Even accounting for the years until sale, solar panels deliver:

• Immediate savings on electricity bills (€800 to €1,200 per year)
• Property value increase when you sell
• Faster sale times (energy-efficient homes spend less time on the market)

Other Energy Upgrades That Boost BER and Value

While solar panels are highly effective, other SEAI-grant-eligible upgrades also improve BER ratings:

1. Insulation (Attic, Cavity Wall, External Wall)

• BER improvement: 1 to 3 grades depending on current state
• SEAI grant: Up to €4,200 (attic + cavity wall)
• Annual savings: €300 to €800 on heating bills

2. Heat Pumps

• BER improvement: 2 to 4 grades (replacing oil/gas boilers)
• SEAI grant: Up to €12,500 (heat pump system + upgrades)
• Annual savings: €800 to €1,500 on heating bills

Read our guide: Heat Pumps and Solar Panels Ireland: €12,500 Grant Guide

3. Windows and Doors

• BER improvement: 1 to 2 grades (replacing single glazing)
• SEAI grant: Up to €4,000
• Annual savings: €200 to €500 on heating bills

The SEAI Study Shows Upgrades Add Value Before Sale

One of the most important findings from the SEAI research is that final sale prices show a stronger BER effect than asking prices. This suggests that homeowners can unlock additional value by upgrading before listing their property.

Joanne Geary, Managing Director of MyHome.ie, commented:

"The impact of a better BER on day-to-day running costs and the environment is already clear, and now this innovative analysis proves the positive, proportionate effect the rating has on house prices in urban, suburban and rural areas around the country. These research findings give homeowners yet another compelling reason to investigate a home energy upgrade."

Should You Upgrade Before Selling or Reduce the Price?

If you are planning to sell within the next 3 to 5 years, the SEAI data provides a clear answer: upgrade before selling.

Example scenario:

• Current home value: €400,000 (BER C3)
• Solar system cost: €6,500 (after grant)
• BER improvement: C3 to C1 (2 grades)
• Property value increase: €21,600 (2.7% × 2 × €400,000)
• Net gain: €21,600 – €6,500 = €15,100

Even if you only capture half the theoretical value increase (due to market conditions or buyer negotiations), you are still ahead financially and you enjoyed lower electricity bills in the years leading up to the sale.

Frequently Asked Questions

How much does solar increase my home's BER rating?

A typical 5 kWp solar system improves your BER rating by 1 to 2 grades, depending on your starting rating. Solar plus battery storage can deliver a 2 to 3 grade improvement.

Will solar panels increase my property value in Ireland?

Yes. According to the SEAI study (August 2026), each BER grade improvement adds 2.7 per cent to home value nationally (4.7 per cent in rural areas). A 2-grade improvement from solar panels could add €16,000 to €27,000 to a typical Irish home's sale price.

Do I need to upgrade my BER certificate after installing solar?

Yes. After installing solar panels, your installer will arrange for an updated BER assessment. The new certificate reflects your improved energy efficiency and is required for property sales.

How long does it take to get a new BER certificate?

A BER assessment typically takes 1 to 2 hours on-site and the certificate is issued within 3 to 5 working days. The cost is approximately €150 to €250.

Can I claim the SEAI grant and still benefit from property value increase?

Yes. The €1,800 SEAI solar grant reduces your upfront cost, and the BER improvement still adds 2.7 per cent per grade to your property value. The grant and the property value increase are separate benefits.

Final Thoughts

The SEAI study released in August 2026 provides official confirmation of what the market has been showing for years: energy efficiency adds real, measurable value to Irish homes. Each BER grade improvement is worth an average 2.7 per cent (up to 4.7 per cent in rural Ireland), and buyers are willing to pay significantly more for properties with lower running costs, better comfort and green mortgage eligibility.

For homeowners planning to sell in the next 3 to 10 years, solar panels offer a unique combination of benefits:

• Immediate electricity bill savings (€800 to €1,200 per year)
• BER improvement by 1 to 2 grades
• Property value increase of €16,000 to €27,000 for a typical home
• Faster sale times in a competitive market

With SEAI grants covering €1,800 of the cost, there has never been a better time to upgrade.

Ready to Boost Your BER Rating and Property Value?

WattCharger designs solar systems that maximise your BER improvement and property value. We handle all SEAI grant paperwork and arrange your updated BER certificate after installation. Get your free consultation today.