Home Energy Retrofit Quotes in Ireland
Compare up to 4 local home energy retrofit professionals. Free, no obligation quotes.
A home energy retrofit is not a single upgrade but a planned, coordinated overhaul of your home's entire energy performance: insulation, heating, windows, ventilation, and renewable energy all addressed together. The goal is to take a draughty, expensive-to-heat home (typically rated D, E, or F on the BER scale) and bring it up to B2 or better, cutting heating bills by 50 to 70% and transforming comfort levels.
The SEAI's National Home Energy Upgrade Scheme has made deep retrofit far more accessible. Through SEAI-approved One Stop Shops, qualifying homeowners can get 50% of costs covered, with households on lower incomes eligible for up to 80% funding. The One Stop Shop manages the entire project from initial BER assessment through to final certification, acting as a single point of responsibility.
Retrofit is particularly important for Ireland's older housing stock. Over 500,000 Irish homes were built before 1980 with minimal or no insulation, single-glazed windows, and oil or solid fuel heating. These homes are responsible for a disproportionate share of Ireland's residential carbon emissions and are the most expensive to heat. A whole-house retrofit typically costs €35,000 to €70,000 before grants, but the combination of energy savings, increased property value, and improved comfort makes it a sound financial investment for most homeowners.
Because retrofit involves multiple trades working in sequence (insulation, windows, heating, ventilation, electrics), project management is critical. Poorly coordinated work leads to delays, cost overruns, and substandard results. Comparing quotes from at least two One Stop Shop providers ensures you get competitive pricing and a realistic project plan.
SEAI Grants May Be Available
Some home energy retrofit work may qualify for SEAI grants. Visit HomeEnergyGuide.ie to check eligibility and amounts.
SEAI Grants May Apply
Some home energy retrofit work qualifies for SEAI grants of up to €8,000 or more. Check eligibility and current grant amounts on our energy guide.
Check SEAI Grants on HomeEnergyGuide.ieHow Much Does Home Energy Retrofit Cost in Ireland?
Typical pricing for home energy retrofit services in Ireland (2026):
| Service | Typical Cost | Notes |
|---|---|---|
| Partial retrofit (insulation + heating) | €15,000 | €30,000 | Property size, current condition |
| Deep retrofit (B2+ target) | €30,000 | €60,000 | Starting BER, property type, scope |
| SEAI One Stop Shop retrofit | €25,000 | €50,000 | Property type, grant eligibility |
Retrofit costs depend on your home's starting point (a G-rated cottage needs more work than a D-rated semi), the target BER rating, the scope of measures (insulation type, heating system, window spec), and your home's size and construction. A mid-range retrofit of a three-bed semi from D to B2 typically costs €35,000 to €50,000 before grants. A deep retrofit of a large detached house from F to A3 can reach €60,000 to €80,000. After SEAI grants (50-80%), your out-of-pocket cost is substantially lower. Dublin One Stop Shops generally quote 10-15% above national averages.
What to Expect: The Home Energy Retrofit Process
- Initial BER assessment. A registered assessor surveys your home and produces your current BER rating plus an advisory report listing every possible upgrade and its estimated impact.
- One Stop Shop consultation. You engage an SEAI-approved One Stop Shop who designs a retrofit plan for your home, specifying which measures are included, the expected BER improvement, the total cost, and the grant amount.
- Grant application. The One Stop Shop submits your application to SEAI. You must have approval before any work begins.
- Work begins, typically following a fabric-first sequence: attic insulation, wall insulation, window replacement, then heating system (heat pump), then ventilation (MVHR). This order ensures the heating system is sized correctly for the improved building fabric.
- The One Stop Shop manages quality control, coordinates trades, and handles all SEAI compliance requirements throughout the project.
- Post-works BER assessment confirms the improved rating. SEAI may carry out an inspection. Your grant is processed and your contribution is invoiced.
Common Mistakes to Avoid
- Doing measures in the wrong order. Insulation and windows must come before the heating system. A heat pump sized for an uninsulated home will be oversized (and expensive) once insulation is added.
- Not using a One Stop Shop when eligible. Managing your own retrofit with separate contractors means you miss out on the higher grant rates and have no single point of responsibility when things go wrong.
- Underestimating the total cost. Retrofit budgets should include a 10-15% contingency for unexpected issues (hidden damp, structural repairs, asbestos removal). Older homes almost always have surprises.
- Ignoring ventilation. A fully insulated, airtight home without adequate ventilation traps moisture and causes condensation, mould, and poor air quality. MVHR should be part of every deep retrofit.
- Choosing the cheapest One Stop Shop without checking their track record. Ask for references, visit a completed project if possible, and check how many retrofits they have completed. Experience matters enormously in retrofit work.
What to Look for When Hiring a Home Energy Retrofit Professional
Use an SEAI-approved One Stop Shop for the best grant support and project management. Check the list at seai.ie. A good One Stop Shop will have a track record of completed projects and should be willing to share references. They should carry full insurance (public liability, employer's liability, professional indemnity) and hold all necessary trade registrations for the subcontractors they use. Be wary of providers who cannot clearly explain the grant process, who pressure you to sign quickly, or who cannot provide a detailed, itemised breakdown of costs. Ask to see before-and-after BER certificates from previous projects similar to yours.
Questions to Ask Your Home Energy Retrofit Professional
- Are you an SEAI-approved One Stop Shop? Only approved One Stop Shops can access the full National Home Energy Upgrade Scheme grants and manage the entire process on your behalf.
- What BER rating will my home achieve after the retrofit? A responsible provider should be able to give a confident estimate (e.g., B2 or B1) based on the proposed measures. Vague promises of 'significant improvement' without a target rating are not good enough.
- Can I see before-and-after examples of similar homes you have retrofitted? A provider with experience on homes similar to yours (same era, construction type, size) is more likely to deliver a smooth project with accurate cost estimates.
- What is the total cost, and what will my out-of-pocket contribution be after grants? You need a clear, itemised breakdown showing total cost, SEAI grant amount, and your net payment. This should be in writing before you commit.
- How long will the project take, and will I need to move out? A typical whole-house retrofit takes 4 to 8 weeks. Some work (external insulation, window replacement) can be done while you live there. Internal dry-lining and heating changes may require temporary relocation for comfort.
- What happens if costs exceed the original quote? Retrofitting older homes can uncover unexpected issues (hidden damp, structural problems). A good provider should explain how variations are handled and what contingency is built into the price.
Frequently Asked Questions
A whole-house retrofit of a typical three-bed semi-detached house costs €35,000 to €55,000 before grants. This typically includes attic and wall insulation, window replacement, heat pump installation, MVHR ventilation, and associated electrics. Larger or older homes can cost €60,000 to €80,000. SEAI grants cover 50% of costs for most households and up to 80% for lower-income households, reducing your out-of-pocket cost to €10,000 to €30,000.
The One Stop Shop scheme provides a single SEAI-approved contractor to manage your entire retrofit from start to finish. They carry out the initial BER assessment, design the retrofit plan, coordinate all trades (insulation, windows, heating, ventilation), handle the SEAI grant application, and manage quality control. The grant is applied directly, so you only pay your contribution. This removes the complexity of managing multiple contractors yourself.
A deep retrofit typically brings a home from D, E, or F to B2 or better. The exact result depends on your starting point and the measures installed. Homes that start at G or F and receive full insulation, new windows, a heat pump, and MVHR often reach B1 or even A3. Your One Stop Shop should provide a target BER rating as part of their proposal, calculated using DEAP software.
A typical whole-house retrofit takes 4 to 8 weeks from start to finish. External wall insulation takes 2 to 4 weeks. Window replacement takes 2 to 5 days. Heat pump installation takes 2 to 4 days. MVHR installation takes 2 to 3 days. These phases may overlap. Add 4 to 8 weeks for grant approval before work can begin, so the total timeline from initial enquiry to completion is typically 3 to 5 months.
Yes. Older homes (pre-1980) benefit most from retrofit because they start from a much lower baseline. A home rated F or G that achieves B2 after retrofit can see heating bills drop by 50 to 70%. The property value increase (typically 10-15% based on ESRI research) often exceeds the homeowner's share of the cost after grants. The improved comfort, reduced noise, and better air quality are additional benefits that homeowners consistently rate as the most noticeable improvement.
Not necessarily, but it depends on the scope. External insulation, roof work, and window replacement can usually be done while you live in the house, though there will be noise and scaffolding. Internal dry-lining means losing access to rooms one at a time. Heating system replacement means a day or two without heating. Some homeowners choose to stay elsewhere for the most disruptive phase (usually 1 to 2 weeks), while others manage with some inconvenience. Your One Stop Shop should advise on the best approach.
You can do individual measures at any time using SEAI's individual measure grants (for attic insulation, cavity fill, etc.). However, the best grants and the best results come from a whole-house approach through a One Stop Shop. Doing measures in the wrong order (e.g., installing a heat pump before insulating) leads to a poorly performing system. If budget requires staging, follow the fabric-first principle: insulation and windows first, heating and ventilation second.
Under the National Home Energy Upgrade Scheme, most homeowners receive 50% of costs covered by SEAI grants. Households in receipt of certain social welfare payments qualify for up to 80%. Individual measure grants are also available for standalone works: up to €6,000 for external insulation, up to €6,500 for heat pumps, up to €1,500 for attic insulation, and more. Your home must have been built before 2011. Check eligibility at HomeEnergyGuide.ie.
Home Energy Retrofit Quotes by County
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