House sustainability costs
Costs for making your home sustainable 2026
Making your home more sustainable costs between €1,000 for cavity wall insulation and €19,500 for HR+++ glass with insulating frames. Sustainability involves taking measures such as insulation, solar panels, and HR glass to reduce your energy consumption. The costs depend on the type of measure, the size of your home, and the quality of the materials. In this price guide, you can read about the costs of making your home sustainable and what you should look out for.
Table of Contents
- What does it cost to make your home sustainable?
- Sustainability costs per property type
- Price-determining factors for making your home sustainable
- Additional costs and surcharges
- How does the professional work?
- How can you save on sustainability costs?
- Common problems in poorly insulated homes
- Find the best professional for your project
- Frequently asked questions
- Book a professional
- Useful links
What does it cost to make your home sustainable?
The costs for making your home sustainable average between €1,000 for cavity wall insulation in an apartment and €19,500 for HR+++ glass with insulating frames. These prices include materials, installation, and 21% VAT. The exact costs depend on the chosen measure, the type of home, and the surface area you want to insulate.
Cavity wall insulation costs per property type
| Property type | Price |
|---|---|
| Apartment | €1,000 |
| Terraced house | €2,200 |
| Detached house | €3,200 |
The costs for making an apartment sustainable are lower because the surface area to be insulated is smaller. With a detached house, all outer walls are accessible, resulting in higher costs.
Roof insulation costs
| Insulating a | Price |
|---|---|
| Slanted roof | €4,500 |
| Flat roof | €4,150 |
Roof insulation makes a big difference in energy consumption because warm air escapes through the roof. The price depends on the roof construction and the insulation material.
Glass insulation costs
| Type of glass | Price |
|---|---|
| HR++ (in existing frame) | €3,000 - €4,500 |
| HR+++ (with insulating frame) | €13,000 - €19,500 |
HR++ glass is an affordable first step, while HR+++ glass with insulating frames offers the best insulation value but requires a larger investment. All mentioned prices include 21% VAT and labour.
Sustainability costs per property type
The costs differ per property type and chosen measure. An apartment is the cheapest to insulate due to the smaller surface area. A detached house has more exterior walls and therefore higher costs.
Cavity wall insulation by property type
| Property type | Price |
|---|---|
| Apartment | €1,000 |
| Terraced house | €2,200 |
| Detached house | €3,200 |
Roof insulation by type
| Insulating a | Price |
|---|---|
| Slanted roof | €4,500 |
| Flat roof | €4,150 |
Glass insulation by type
| Type of glass | Price |
|---|---|
| HR++ (in existing frame) | €3,000 - €4,500 |
| HR+++ (with insulating frame) | €13,000 - €19,500 |
Price-determining factors for making your home sustainable
Several factors affect the cost of making your home more sustainable.
Property type and size
A detached house has more facade and roof surface than an apartment. More surface area means more material, more labour time, and higher costs.
Year of construction and current state
Homes built before 1991 are often poorly insulated. Older homes require more work because existing materials must first be removed or adjusted. The current state also determines if extra preparatory work is needed, like repairing damp damage.
Chosen measures
Complete sustainability with cavity wall insulation, roof insulation, HR glass, and solar panels is logically more expensive than cavity wall insulation alone.
Material costs
The price of insulation materials and glass varies by quality and brand. High-quality materials with better insulation values cost more but provide more energy savings.
Complexity and accessibility
Difficult-to-reach roofs or high facades require more time and sometimes specialist equipment like scaffolding. This increases labour and logistics costs.
Region
In large cities, labour costs are often higher due to fixed costs like parking and travel time for the professionals.
Urgency versus planned
Urgent jobs cost more because the professional must adjust their schedule. Planned work is more economical.
Weekend
Work during the weekend costs more than on weekdays as professionals charge a surcharge.
Energy label improvement
Improving your label from G to A increases property value and lowers monthly costs, providing long-term financial benefits.
Subsidies and financing
Subsidies and municipal schemes can significantly reduce the net investment. VAT on solar panels can be reclaimed.
Legal obligations
Rental properties must have at least energy label C by 2028, and a valid label is mandatory for sales.
Synergy effect
Insulation lowers the required capacity for a heat pump, making installation cheaper. Measures reinforce each other.
Additional costs and surcharges
Extra costs are situation-dependent. At Zoofy, you do not pay call-out charges.
- Urgent jobs: a surcharge applies as the professional must adjust their schedule
- Weekend work: work at the weekend is more expensive than on weekdays
- Unforeseen extra work: extra costs can arise if repairs are needed after removing existing coverings
- Facade insulation: adjustments to sills or frames can lead to additional costs
How does the professional work?
- Energy scan: An advisor determines your current label and recommends the most effective measures.
- Applying insulation: The professional starts with the roof, floor, facade, and glass.
- Regulating ventilation: After insulation, the installer ensures good ventilation to prevent damp and mould.
- Adjusting the heating system: The professional replaces your old boiler with an HR boiler or heat pump.
- Installing solar panels: Finally, solar panels are installed to generate your own energy.
How can you save on sustainability costs?
- Start with small measures: Draught strips and radiator foil cost little but provide immediate savings.
- Ensure a clear workspace: Remove items near walls and clear the attic to save on labour time.
- Plan on weekdays: Avoid more expensive weekend or urgent rates.
- Combine measures: Performing multiple tasks at once is more economical than separate jobs.
- Check for subsidies: This can save thousands of pounds.
- Book via Zoofy: You get a fixed rate upfront without call-out charges.
Common problems in poorly insulated homes
Heat loss through the roof
Up to 30% of heat escapes through an uninsulated roof, recognisable by high heating bills and cold rooms upstairs.
Draughts through gaps and cracks
Old frames and poorly sealed windows cause draughts and energy loss.
Uninsulated floors
An uninsulated floor causes up to 15% heat loss and feels constantly cold.
Damp problems after insulation
A well-insulated home without adequate ventilation suffers from condensation and mould.
Find the best professional for your project
- No call-out charges: You only pay for the work itself.
- Fixed price upfront: You know exactly what the costs are, without surprises.
- Fast booking without quote hassle: Choose a time and schedule a professional directly.
- Payment via QR code after completion: You only pay after you are satisfied.
- Reliable, verified professionals: All professionals are screened and experienced.
Frequently asked questions
How much does it cost to make a house sustainable?
Costs range from €1,000 for cavity wall insulation to €19,500 for HR+++ glass with frames. A complete project can cost tens of thousands of pounds.
What is included in home sustainability?
It includes insulation, ventilation, efficient heating, and solar energy, as well as small measures like draught strips.
In what order should I proceed?
Start with insulation, then regulate ventilation, replace the heating system, and finally install solar panels.
Book a professional
Ready to make your home sustainable? At Zoofy, you can book a professional directly without quotes or call-out charges. You will see the costs upfront and be matched with a reliable expert. You only pay when the job is done.