EPC Rating D represents average energy efficiency, with a SAP score of 55-68 points. Around 40% of UK homes fall into this category, offering reasonable running costs but room for improvement.
What Does EPC Rating D Mean?
An EPC Rating D indicates your property has average energy efficiency compared to UK homes. With a SAP score between 55 and 68 points, D-rated properties have decent insulation and heating systems but haven't reached modern efficiency standards.
Properties with an EPC D rating typically cost £1,500-£2,400 per year in energy bills — approximately 20-30% more than a C-rated property but significantly less than E or F ratings.
Can You Rent Out an EPC D Property?
Yes, D-rated properties can be rented legally as they exceed the current minimum E rating. However, they will need upgrading to C by October 2030 to remain rental-compliant.
Typical Features of EPC D Properties
- Good loft insulation: 200mm+ in most areas
- Full double glazing: Throughout the property
- Decent boiler: Combi boiler 5-10 years old
- Cavity wall insulation: Often installed
- Standard controls: Programmer, room thermostat, TRVs on most radiators
Common D-Rated Property Types
- 1990s-2000s homes with original features
- 1980s properties with good upgrades
- Modernised Victorian terraces
- New-build flats from 2000-2010
- Well-maintained ex-council properties
Improving from EPC D to C
D-rated properties are often close to achieving C rating:
Cost-Effective Improvements
- Upgrade to A-rated boiler: £2,500-3,500, adds 8-12 points
- Top up loft insulation to 300mm: £300, adds 2-3 points
- Smart heating controls: £450-600, adds 3-4 points
- LED lighting throughout: £100-200, adds 1-2 points
- Solar panels: £5,000-7,000, adds 6-10 points
Most D-rated properties can reach C with £3,000-6,000 in improvements, often just needing a new boiler and better controls.
Energy Costs Comparison
| Property Type | D Rating Cost | C Rating Cost | Annual Savings |
|---|---|---|---|
| 1-bed flat | £900-1,200 | £700-900 | £200-300 |
| 2-bed house | £1,500-1,900 | £1,200-1,500 | £300-400 |
| 3-bed house | £1,900-2,400 | £1,500-1,900 | £400-500 |
| 4-bed house | £2,400-3,000 | £1,900-2,400 | £500-600 |
Is EPC D Good Enough?
D rating is acceptable but not ideal:
Pros:
- Above UK average efficiency
- Reasonable energy bills
- Can be rented until 2030
- No immediate action needed
- Relatively easy to improve to C
Cons:
- Will need upgrading for 2030 rental rules
- Missing out on £300-600/year energy savings
- May affect property value vs C-rated homes
- Some green mortgages require C rating
Strategic Timing
D-rated properties are in a good position. With 4+ years until the 2030 deadline, you can time improvements strategically — perhaps replacing the boiler when it naturally needs renewal, adding smart controls during redecoration, or installing solar panels when prices drop further.
About This Guide
This guide was researched and written by the EPC Certificate UK Editorial Team, specialists in UK energy performance regulations. All information is sourced from official government publications, regulatory announcements, and industry best practice guides.