A complete energy upgrade is a package of improvements — insulation, heating system upgrades, solar panels, and ventilation — designed to bring your home's BER rating to B2 or higher.
For Cork homeowners facing damp, cold walls, and soaring heating bills, this means upgrading from a D or E BER rating to an A or B — cutting energy costs by up to 60% while making your home genuinely comfortable year-round.
With SEAI One Stop Shop grants covering up to 50% of costs (€18,500 for most homes), many Cork homeowners complete the full upgrade for €15,000–€25,000 net. We handle everything — from the initial BER assessment to final sign-off — across Cork City, Douglas, Ballincollig, Midleton, Carrigaline, and all surrounding areas.
Every component works together to improve your BER rating. Here's what we install and what each part does for your Cork home.
Cavity wall or external/internal dry-lining insulation. Stops heat escaping through your walls — the biggest heat loss in uninsulated homes.
Top-up or replacement with 400mm+ fibreglass or cellulose. Essential for retaining heat that rises.
Air-to-water or air-to-air heat pump replaces your old boiler. Provides space heating, hot water, and works in temperatures as low as -15°C.
4kW–8kW system with battery storage. Generates free electricity during daylight hours; excess can be sold back to the grid.
Mechanical Extract Ventilation or positive input ventilation. Prevents condensation and damp by constantly refreshing air without heat loss.
Triple-glazed uPVC or aluminium frames. Reduces draughts and heat loss while eliminating external noise.
Uninsulated cavity walls, single-glazed windows, no loft insulation — common across Douglas, Ballincollig, and Carrigaline
Solid wall properties needing external insulation; often achieve dramatic improvements from D to B rating
New BER regulations require rental properties to reach C or above by 2025; upgrades protect compliance and reduce void periods
Older stone or concrete construction with high humidity; heat pumps with ventilation solve damp issues that oil heating cannot
Choosing CEL Energy Ltd means working with a trusted, local Cork company that delivers reliable, high-quality energy solutions. We combine local expertise with professional service to make every project smooth, efficient, and future-proof.
Extensive knowledge of the area
Fully qualified & experienced
Honest advice — no hidden costs
Residential & commercial covered
Long-lasting energy solutions
Solar, plumbing, insulation & SEAI
We visit your home, conduct a BER assessment, and identify exactly what upgrades are needed to reach B2. You get a written report and detailed quote.
We handle the SEAI One Stop Shop paperwork for you. Once approved, the grant is paid directly to us — you only pay the net amount.
Our technical team designs the system layout, orders materials, and schedules works. We coordinate insulation, heat pump, solar, and ventilation teams.
All works completed by our qualified installers. You can stay in your home throughout — we work room by room, typically finishing insulation before moving to mechanical systems.
Independent BER assessor certifies the upgrade. You receive your new certificate, all warranty documentation, and a demonstration of your new systems.
Total timeline: 6–10 weeks from assessment to your new BER certificate
Here's a realistic breakdown of what Cork homeowners pay — and how SEAI grants bring the cost down significantly.
Get an accurate quote: Every Cork home is different. A free BER assessment gives you an exact price with all grants calculated.
Real numbers from typical 3-bed semi-detached homes in Cork that have completed the full upgrade.
| Before Upgrade | After Upgrade | |
|---|---|---|
| BER Rating | E or F (worst 15%) | A3 or B2 |
| Annual Heating Cost | €2,200–€2,800 | €700–€1,000 |
| Monthly Electricity (with Solar) | €180–€220 | €60–€90 |
| Indoor Temperature | Struggles to reach 18°C | Steady 20–22°C |
| Condensation & Mould | Persistent in bedrooms and bathrooms | Eliminated |
| Property Value Impact | Lower than comparable A-rated homes | +€15,000–€30,000 |
| Carbon Footprint | 8–12 tonnes CO₂/year | 2–4 tonnes CO₂/year |
| Warranty Coverage | Ageing systems, no coverage | 10-year building warranty |
Cork homes upgraded to A or B rating
Average annual savings per household
Average payback period after grants
CEL Energy Ltd provides complete energy upgrades across Cork. Whether you're searching "energy upgrades near me", "solar energy Cork", or "home insulation Cork", we're your trusted local provider.
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We cater to a wide range of clients across Cork with tailored energy solutions
Reduce energy bills, improve comfort, and future-proof your property with comprehensive upgrades.
Upgrade properties to attract tenants and comply with energy efficiency regulations.
Sustainable solutions for offices, shops, and industrial spaces to reduce operating costs.
Integrate energy-efficient systems during construction or refurbishments for optimal results.
Common questions about complete energy upgrades, costs, and the SEAI grant process.
Ready to cut energy bills, increase efficiency, and future-proof your property? CEL Energy Ltd provides fast, reliable, residential and commercial complete energy upgrades across Cork.
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