Home Grants & Energy2 min check

EPC Improvement Checker

Get a tailored list of upgrades that typically move a property up the EPC scale — useful for landlords and sellers.

Short answer

An EPC is scored 1–100; band C starts at 69 points, band D at 55, band E at 39. Typical uplifts: loft insulation +5–10 points, cavity wall +6–10, new condensing boiler +5–8, solar PV (4kWp) +8–14, LED lighting +1–2, heating controls +2–3. Most D-rated homes can reach C with a focused £3k–£8k spend.

Step 1 of 20%

How it works

The model takes your starting band, applies typical RdSAP uplifts per measure (the methodology assessors use), and predicts your finishing band. It's deliberately conservative — measures don't stack linearly because each upgrade reduces the savings available to the next.

Worked example

Band D (60 points) home with no loft insulation, gravity hot water and 1990s boiler → loft (+8) + new boiler with controls (+9) + LEDs (+2) = 79 points = band C. Cost: £3,500–£5,000.

Who should use this

•Landlords needing to hit MEES band C by 2028 (proposed)
•Sellers wanting a better EPC for valuation
•Homeowners chasing lower bills before retiring

Common mistakes

×Spending heavily on solar without first insulating — assessors weight fabric measures heavily
×Forgetting controls — programmer + room thermostat + TRVs is cheap and adds points
×Using non-RdSAP-recognised products (some heat pumps and LEDs don't score without paperwork)

Frequently asked questions

How long is an EPC valid?▾

10 years. Re-lodge once measures are done to bank the new rating.

Will band C be mandatory?▾

Government has consulted on requiring all rented homes to be EPC C by 2028 (new tenancies) and 2030 (all). Owner-occupiers are unaffected.

Does double glazing help?▾

Marginally — usually +1–3 points unless replacing single glazing.

Related calculators

ECO4 Scheme Checker →Insulation Grant Checker →Solar PV Savings Calculator →Landlord Compliance Checker →