EPC Ratings Explained — What They Mean and How to Improve Yours
Behind the video: how Energy Performance Certificate ratings work in Scotland, why landlords need to care, and how solar+ASHP changes the band.
Watch the video first
📺 EPC Ratings Explained (2:49)
What an EPC actually measures
An EPC (Energy Performance Certificate) rates a building from A (best) to G (worst) based on modelled energy efficiency and CO₂ emissions per square metre.
It's based on the building's fabric (walls, windows, insulation, heating system) — NOT actual usage. Two identical houses with different occupants get the same EPC.
The bands in plain English
| Band | Score | Meaning |
|---|---|---|
| A | 92-100 | Top performance — newer eco builds, fully insulated, ASHP/solar |
| B | 81-91 | Excellent — modern home with renewables |
| C | 69-80 | Above-average — typical post-2010 new build |
| D | 55-68 | Average UK home — pre-2010 build, gas boiler |
| E | 39-54 | Below average — older home, poor insulation |
| F | 21-38 | Poor — old uninsulated property |
| G | 1-20 | Very poor — rare; usually unmodernised stock |
Why landlords need to care: MEES
The Minimum Energy Efficiency Standards (MEES) make it illegal to let or relet a property with an EPC below E. The next phase is targeting Band C minimum for new tenancies by 2028 — a major policy shift for the rental market.
Domestic MEES applies in England & Wales. Scotland is on its own parallel path — the Heat in Buildings strategy points to similar tightening for the rental sector in Scotland.
How to improve an EPC
The headline-grabbing moves:
- Insulation: loft, cavity wall, solid wall, room-in-roof — biggest single uplift
- Heating system: moving from old gas/oil to ASHP can lift 10+ points
- Solar PV: good for 3-8 points depending on size
- Lighting: LED throughout adds 1-2 points
- Double/triple glazing: 2-5 points
A real-world example
Pre-renovation: D-rated terraced house in Bathgate, score 60.
Post-renovation (insulation top-up + ASHP + 4kWp solar): B-rated, score 84.
The single property became:
- MEES compliant for any future tightening
- £14k cheaper to run over 5 years
- £30k+ more valuable on resale (per local agent estimates)
Free EPC consultation
We provide a free EPC consultation — modelling what a specific home would score post-upgrade. No commitment.
Call 03330 384 380.
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