Home Resilience Passport
Our evidence-led planning approach starts with lower demand, then smart electrification, followed by generation, storage, and flexibility where they suit the home.
UK Energy Performance Certificates are a useful regulated snapshot and a common starting point. They use standardised assumptions and do not update automatically as a home changes.
Evolving Home builds on available EPC data for indicative planning. It does not issue, replace, or certify an EPC.
The kitchen-table model
A score, its support, and the next check
The score shows the estimate. The grade shows how well it is supported. The next check shows what to verify before spending.
Estimated Health Score
A 0–100 energy performance estimate from six fabric and system areas, built from available EPC and enrichment data.
Evidence Grade (A-D)
Evidence Grade reflects available-data completeness for this estimate — not a weight inside the 0–100.
Next check
One priority to verify before spending. It is not a quote, eligibility decision, or substitute for professional advice.
The free public score is the energy Health Score. The Passport Health Score is a different composite that appears after you save facts in a Passport. Seeing different numbers is expected when evidence and scope change.
A planning layer, not a replacement
What certificates provide, and what planning still needs
What an EPC gets right
- A regulated A-G snapshot with a shared UK reference point.
- A structured description of fabric, heating, hot water, and installed measures.
- A common starting point for sales, rentals, policy, and upgrade conversations.
What it does not do automatically
- It does not update automatically when the home changes; a new assessment is needed.
- It uses standardised assumptions rather than household-specific behaviour or measured performance.
- The certificate letter alone does not show how complete every input is or which fact to verify next.
Evolving Home starts with EPC data where available, adds a clearly labelled estimate, shows how well that estimate is supported, and points to a next fact to check.
Working principles
Useful planning should make uncertainty visible
Start with available evidence
Use official property data where available, then make assumptions and missing facts visible.
Separate estimate from support
A useful number should not hide how complete or well-supported its inputs are.
Sequence before spending
Reduce demand first, then plan systems and later-stage technologies around the home.
Show limits and review points
Indicative planning should say when evidence, eligibility, suitability, or professional review is still needed.
Current public estimate
Estimated Health Score
A 0–100 energy performance estimate from six fabric and system areas, built from available EPC and enrichment data.
These are the current public energy-score weights, not Passport pillar weights. The full formulas, assumptions, and limitations live on the methodology page.
A direction, not a requirement
Start with the home in front of you
Lower demand first. Electrify well. For some homes, later stages may include solar, storage, smart tariffs, or flexibility. Suitability depends on the building, tenure, connection, occupancy, and budget; none of these is a universal requirement or a promise of grid eligibility or income.
Passivhaus and EnerPHit demonstrate what rigorous fabric-first design and verification can achieve. Evolving Home is not their replacement or a certification route; it offers a staged planning approach for varied homes and starting points.