EPC Rating D Explained: What It Means for Your Home & Bills
Quick Answer: EPC rating D (score 55-68) is the UK average. It means moderate energy efficiency with typical bills of £1,000-1,400/year. It's legal to sell or rent, but improving to C could save £300+/year.
What Does EPC Rating D Actually Mean?
An EPC rating of D means your property has average energy efficiency by UK standards. The rating covers a score range of 55-68 points out of 100.
To check your property's exact EPC score and see potential improvements, search your address here.
D Rating at a Glance
- Score range: 55-68 points
- Typical annual energy costs: £1,000-1,400
- CO2 emissions: 3-5 tonnes per year
- Legal for rentals: Yes (current minimum is E)
- UK properties at this rating: ~35% (most common rating)
Is D Rating Good or Bad?
It's average - not great, not terrible. Here's the context:
Better than: 40% of UK homes (E, F, G ratings)
Worse than: 25% of UK homes (A, B, C ratings)
The Problem with D in 2026
While D is currently legal and common, there are reasons to improve:
- Higher bills: You're paying £300-500/year more than a C-rated home
- Future regulations: Proposed C minimum for rentals could affect resale value
- Buyer expectations: Homebuyers increasingly expect C or better
- Mortgage rates: Some lenders offer better rates for C+ properties
What Causes a D Rating?
Typical features of D-rated properties:
- Partial insulation - Some loft insulation but gaps, or no cavity wall insulation
- Older boiler - 10-15 years old, not a modern condensing model
- Original windows - Single glazing or early double glazing
- Basic heating controls - No room thermostat or smart controls
- Incandescent/halogen lighting - Not upgraded to LED
Energy Costs: D vs Other Ratings
Annual energy costs for a typical 3-bedroom house:
| Rating A | £300/year | Save £900 vs D |
| Rating B | £550/year | Save £650 vs D |
| Rating C | £850/year | Save £350 vs D |
| Rating D | £1,200/year | You are here |
| Rating E | £1,600/year | Costs £400 more |
| Rating F/G | £2,200+/year | Costs £1,000+ more |
How to Improve from D to C
The jump from D to C typically requires 12-25 EPC points. Here are the most cost-effective improvements:
1. Loft Insulation Top-Up (£300-500)
If you have less than 270mm, topping up is cheap and effective. Adds 2-5 EPC points.
2. Cavity Wall Insulation (£500-1,500)
If your walls are unfilled, this is one of the best improvements. Adds 5-10 EPC points.
3. Smart Heating Controls (£150-400)
Room thermostat and TRVs improve efficiency. Adds 2-4 EPC points.
4. LED Lighting Throughout (£100-200)
Quick win that adds 1-2 EPC points and cuts lighting bills by 80%.
5. Boiler Upgrade (£2,000-3,500)
If your boiler is 15+ years old, a new A-rated condensing boiler adds 5-10 EPC points.
For personalised recommendations based on your property, search your address to see what improvements your EPC assessor recommended.
D Rating and Renting
Good news for landlords: D-rated properties are legal to rent. The current minimum is E.
However, be aware:
- Government has proposed raising the minimum to C (date TBC)
- Tenants increasingly prefer energy-efficient homes
- You may struggle to compete with better-rated properties
See our complete guide: EPC Requirements for Landlords 2026
D Rating and Selling
D-rated homes sell fine, but you might see:
- Buyers negotiating down for energy improvements
- Longer time on market vs similar C-rated properties
- Lower offers from investors planning to rent
Consider improving to C before selling - the £1,000-2,000 investment often pays back in higher offers.
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