THE PROPERTY FILTER TAKE
The sales market premium for A/B rated homes over D-rated equivalents is just 1.6%, worth around £4,500 at average English prices (Nationwide, June 2026)
For buy-to-let investors the gap is far larger: A/B rated properties command a 12.2% premium over D-rated equivalents, driven by the October 2030 EPC C compliance deadline
Consider modelling retrofit costs before acquiring F or G rated rental stock; a BTL stress test can help assess whether the discount compensates for upgrade spend
Nationwide's June 2026 analysis of the English housing market finds that 78% of homeowners expect buyers to pay more for energy-efficient homes. The actual sales market premium for the highest-rated properties is 1.6%. The gap between those two numbers is what investors need to understand.
What Buyers Say vs What They Actually Pay
That gap between intention and transaction is the headline finding from a major Nationwide study published in June 2026. The analysis controlled for property size, location, and build era to isolate the price impact of EPC (Energy Performance Certificate) ratings.
For a home rated A or B versus a D-rated equivalent, the premium is just 1.6%, or roughly £4,500 at average English house prices (Nationwide, June 2026). Properties rated C or E show almost no measurable difference compared to D. At the lower end, F and G-rated homes trade at a 1.4% discount to D-rated equivalents, worth around £4,000 in cash terms (Nationwide, June 2026).
The awareness gap makes the picture more complex. Some 54% of homeowners do not know their own EPC rating (Nationwide, June 2026), despite the majority expecting it to influence what buyers will pay. You cannot price in what you do not know.
Age shapes attitudes considerably. Nationwide found 49% of buyers aged 25-34 rate energy efficiency as "very important" in their search. That cohort will represent a growing share of buyers over the next decade. The data points to a gradual repricing of low-rated stock in the owner-occupier market, even if the current 1.6% premium looks modest.
The Buy-to-Let Story Is Very Different
The sales market figure masks a sharp divergence in the rental sector. For buy-to-let purchases, an A or B rated property commands a 12.2% premium over a D-rated equivalent (Nationwide, June 2026). That is not a rounding error. The trend is driven by regulation.
From October 2030, all tenancies in England and Wales must achieve a minimum EPC C rating. Landlords who cannot comply face fines of up to £30,000 per property. That regulatory pressure is already feeding into BTL acquisition prices. Buyers are paying now to avoid retrofit costs later.
The upgrade arithmetic matters. Nationwide estimates the average cost to bring a D-rated home to EPC C at around £6,000. For F or G-rated stock, that figure rises to approximately £17,000 (Nationwide, June 2026). Against a 12.2% acquisition premium, the numbers shift considerably depending on purchase price and rental yield. Property investors may wish to run the figures through a BTL stress test calculator to model how upgrade spend affects their return.
The Underlying Picture Across the Housing Stock
The trend in the housing stock is moving in one direction. Nationwide's analysis of English Housing Survey data shows 53% of owner-occupied homes are now rated A to C, up from 21% a decade ago (Nationwide, June 2026). Newly built homes account for much of that improvement: around 97% are rated C or above.
Older properties tell a different story. Around 24% of pre-1919 dwellings in England carry an EPC rating of E to G, compared to just 2% of post-1990 homes (Nationwide, June 2026). The gap between old and new stock is where the upgrade challenge - and the acquisition opportunity - sits.
The government launched a consultation in January 2026 on overhauling the EPC methodology. If the rating system changes, premium calculations change with it. Investors reviewing acquisition strategy may wish to explore broader property investment approaches before locking in assumptions about future premiums.
The scale of the national challenge is considerable. Upgrading the entire English housing stock to EPC C carries a total estimated price tag of approximately £81 billion (Nationwide, June 2026). The government's Warm Homes Plan targets five million home upgrades by 2030. Residential buildings currently account for 15% of UK greenhouse gas emissions (Nationwide, June 2026), which means the regulatory direction of travel is unlikely to soften.
For tools and guidance covering EPC planning and investment analysis, Property Filter's free resources hub is a practical starting point.
Key takeaways
The sales market premium for A/B rated homes over D-rated equivalents is 1.6%, equivalent to roughly £4,500 at average English house prices (Nationwide, June 2026)
Buy-to-let buyers pay a 12.2% premium for A/B rated stock over D-rated equivalents, driven by regulatory pressure ahead of the October 2030 EPC C deadline (Nationwide, June 2026)
F and G rated homes trade at a 1.4% discount to D-rated equivalents, worth around £4,000 at average prices (Nationwide, June 2026)
54% of homeowners do not know their own EPC rating, despite 78% expecting buyers to pay more for energy-efficient homes (Nationwide, June 2026)
Upgrading the entire English housing stock to EPC C would cost an estimated £81 billion; the average per-home cost stands at around £7,500 (Nationwide, June 2026)
Nationwide's June 2026 analysis of the English housing market finds that 78% of homeowners expect buyers to pay more for energy-efficient homes. The actual sales market premium for the highest-rated properties is 1.6%. The gap between those two numbers is what investors need to understand.
What Buyers Say vs What They Actually Pay
That gap between intention and transaction is the headline finding from a major Nationwide study published in June 2026. The analysis controlled for property size, location, and build era to isolate the price impact of EPC (Energy Performance Certificate) ratings.
For a home rated A or B versus a D-rated equivalent, the premium is just 1.6%, or roughly £4,500 at average English house prices (Nationwide, June 2026). Properties rated C or E show almost no measurable difference compared to D. At the lower end, F and G-rated homes trade at a 1.4% discount to D-rated equivalents, worth around £4,000 in cash terms (Nationwide, June 2026).
The awareness gap makes the picture more complex. Some 54% of homeowners do not know their own EPC rating (Nationwide, June 2026), despite the majority expecting it to influence what buyers will pay. You cannot price in what you do not know.
Age shapes attitudes considerably. Nationwide found 49% of buyers aged 25-34 rate energy efficiency as "very important" in their search. That cohort will represent a growing share of buyers over the next decade. The data points to a gradual repricing of low-rated stock in the owner-occupier market, even if the current 1.6% premium looks modest.
The Buy-to-Let Story Is Very Different
The sales market figure masks a sharp divergence in the rental sector. For buy-to-let purchases, an A or B rated property commands a 12.2% premium over a D-rated equivalent (Nationwide, June 2026). That is not a rounding error. The trend is driven by regulation.
From October 2030, all tenancies in England and Wales must achieve a minimum EPC C rating. Landlords who cannot comply face fines of up to £30,000 per property. That regulatory pressure is already feeding into BTL acquisition prices. Buyers are paying now to avoid retrofit costs later.
The upgrade arithmetic matters. Nationwide estimates the average cost to bring a D-rated home to EPC C at around £6,000. For F or G-rated stock, that figure rises to approximately £17,000 (Nationwide, June 2026). Against a 12.2% acquisition premium, the numbers shift considerably depending on purchase price and rental yield. Property investors may wish to run the figures through a BTL stress test calculator to model how upgrade spend affects their return.
The Underlying Picture Across the Housing Stock
The trend in the housing stock is moving in one direction. Nationwide's analysis of English Housing Survey data shows 53% of owner-occupied homes are now rated A to C, up from 21% a decade ago (Nationwide, June 2026). Newly built homes account for much of that improvement: around 97% are rated C or above.
Older properties tell a different story. Around 24% of pre-1919 dwellings in England carry an EPC rating of E to G, compared to just 2% of post-1990 homes (Nationwide, June 2026). The gap between old and new stock is where the upgrade challenge - and the acquisition opportunity - sits.
The government launched a consultation in January 2026 on overhauling the EPC methodology. If the rating system changes, premium calculations change with it. Investors reviewing acquisition strategy may wish to explore broader property investment approaches before locking in assumptions about future premiums.
The scale of the national challenge is considerable. Upgrading the entire English housing stock to EPC C carries a total estimated price tag of approximately £81 billion (Nationwide, June 2026). The government's Warm Homes Plan targets five million home upgrades by 2030. Residential buildings currently account for 15% of UK greenhouse gas emissions (Nationwide, June 2026), which means the regulatory direction of travel is unlikely to soften.
For tools and guidance covering EPC planning and investment analysis, Property Filter's free resources hub is a practical starting point.
Key takeaways
The sales market premium for A/B rated homes over D-rated equivalents is 1.6%, equivalent to roughly £4,500 at average English house prices (Nationwide, June 2026)
Buy-to-let buyers pay a 12.2% premium for A/B rated stock over D-rated equivalents, driven by regulatory pressure ahead of the October 2030 EPC C deadline (Nationwide, June 2026)
F and G rated homes trade at a 1.4% discount to D-rated equivalents, worth around £4,000 at average prices (Nationwide, June 2026)
54% of homeowners do not know their own EPC rating, despite 78% expecting buyers to pay more for energy-efficient homes (Nationwide, June 2026)
Upgrading the entire English housing stock to EPC C would cost an estimated £81 billion; the average per-home cost stands at around £7,500 (Nationwide, June 2026)
Frequently asked questions
Frequently asked questions
What is an EPC rating?
How much more do buyers pay for an energy-efficient home?
Does EPC rating matter more for buy-to-let investors than owner-occupiers?
What does it cost to improve a property's EPC rating?
Will EPC ratings become more important over time?
