Compare energy-improvement works with estimated utility savings, property value uplift and optional green-finance savings across five European markets.
Screen an energy-retrofit decision by putting works cost, expected energy savings, potential value uplift and financing impact into one editable scenario before commissioning the project.
Every financial assumption is editable. Incentives and green-mortgage conditions are not guaranteed and must be confirmed with the relevant provider.
🇵🇹 Portugal · 35/100
This calculator is an educational screening estimate. It does not issue an EPC, verify grant eligibility, value a property or offer lending advice. Obtain certified technical, legal and lending advice before committing to works.
Country guide · Portugal
Use the certificate as the technical baseline before estimating finance or resale value.
Renovation measure matrix
When to investigate
Cold surfaces, heat loss or discomfort through walls, roof or floor.
Confirm before committing
Moisture strategy, detailing, heritage restrictions and technical design.
When to investigate
Draughts, poor glazing or weak junctions.
Confirm before committing
Ventilation strategy, installation quality and condensation risk.
When to investigate
Ageing or high-cost system, poor controls or inadequate comfort.
Confirm before committing
Heat-loss calculation, emitter suitability, tariffs and installer scope.
When to investigate
Suitable roof, daytime demand and long holding period.
Confirm before committing
Roof condition, permissions, grid connection and maintenance.
When to investigate
Humidity, overheating, stale air or room-by-room comfort differences.
Confirm before committing
Airflow design, controls, commissioning and interaction with airtightness.
For a property in Lisboa, model a current value of 275 000 €, an annual energy bill of 1800 € and an improvement budget of 30 000 €. The result is a decision screen, not a certified rating or a grant approval.
No. An EPC, DPE, CEE or Energieausweis must be issued under the applicable national process by an authorised professional.
No. Enter only a benefit you have independently verified. Eligibility, caps, timing and lender conditions can change.
It divides net works cost by estimated annual energy and financing savings. It excludes maintenance, tax, inflation and resale timing.
