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EPC E → C upgrade for EPC E semi → C
E-band semis are the most common MEES-risk property: old enough to have neglected fabric, new enough to have workable cavities. A methodical 2-step path usually hits C for under £4,000.
Upgrade measure stack
Cheapest-first ordering — calculator stops adding measures once the gap to C closes.
| Measure | Cost | SAP uplift |
|---|---|---|
| Loft insulation top-up to 270mm | £450 | +2.0 |
| Full LED lighting retrofit | £250 | +1.0 |
| Thermostatic radiator valves + controls | £400 | +1.0 |
| Cavity wall insulation | £1200 | +6.0 |
| Upgrade to modern double glazing | £6500 | +4.0 |
| Air-source heat pump (BUS-eligible) | £11000 | +10.0 |
| Total | £19800 | to band D |
What's specific about this archetype
The cheapest SAP points live here: cavity wall insulation typically adds 6 SAP points for £1,200, loft top-up adds another 2 for £450. Together, these two measures alone often close a D → C gap. If the gap is E → C, you'll need one more measure — usually glazing or a heating control upgrade.
Model your exact property
The figures above use a reference archetype. Your real floor area, mortgage balance, current energy bill and exact current band will shift the numbers. Use the full EPC upgrade calculator for a customised version, the insulation savings calculator to choose between competing fabric measures, and BUS grant eligibility if a heat pump is on the shortlist.
Other current epc → c
| Archetype | Start → Target | Net cost | Annual saving |
|---|---|---|---|
| EPC F terrace → C | EPC F → C | £23100 | £420/yr |
| EPC E semi → C (this page) | EPC E → C | £12300 | £276/yr |
| EPC D semi → C | EPC D → C | £5350 | £171/yr |
| EPC D flat → C | EPC D → C | £7200 | £63/yr |