Quick Summary
- EPC C by end of 2028 — all new private lets must meet EPC C from 31 December 2028; existing tenancies have until 31 December 2033
- New Heat Retention Rating added — Scotland is introducing a separate Heat Retention Rating alongside the existing EPC scale from 2026
- Typical improvement costs: £5,000–£25,000 — wall insulation, heating upgrades, and double glazing are the most common routes to EPC C
- Use our Buy-to-Let Tax Calculator to model how upgrade costs affect your yield and tax position
The EPC C deadline is now the biggest compliance challenge facing Scottish landlords. Properties currently rated D, E, F, or G — which make up a substantial portion of Scotland's older housing stock — need significant investment to comply. Landlords who miss the deadline face restrictions on letting their properties.
Quick Answer: From 31 December 2028, new private residential tenancies in Scotland must have an EPC rating of at least C. Existing tenancies have until 31 December 2033. The current minimum is EPC E — properties rated F or G cannot legally be let now. Scotland is also adding a separate Heat Retention Rating to EPCs from 2026, measuring how well a building retains heat separately from energy efficiency. Typical costs to upgrade from D to C range from £3,000 to £15,000, depending on the property type. Various grants are available through the Warmer Homes Scotland scheme.
What is an EPC?
An Energy Performance Certificate (EPC) rates how energy-efficient a property is, on a scale from A (most efficient) to G (least efficient). It's produced by an accredited energy assessor who visits the property and evaluates:
- Wall insulation (cavity, solid, or uninsulated)
- Loft insulation depth
- Floor insulation
- Window glazing (single, double, or triple)
- Heating system type and controls
- Hot water system
- Renewable energy features (solar panels, heat pumps)
The certificate gives a current rating, a potential rating (if all recommended improvements were made), estimated annual energy costs, and a list of recommended improvements with indicative costs.
EPCs are valid for 10 years from the date of assessment. For lettings, the EPC must be provided to the tenant before they move in.
Scotland's current rules (EPC E minimum)
Since 1 April 2022 (for new tenancies) and 1 April 2025 (for all tenancies), private rented properties in Scotland must have at least an EPC E rating. Properties rated F or G cannot legally be let.
If a tenant in an F or G-rated property complains, the landlord faces:
- Referral to the First-tier Tribunal for Scotland
- Improvement notices
- Potential fines and loss of landlord registration
The EPC C deadline: what's coming
Timeline
| Date | Requirement |
|---|---|
| Now | EPC E minimum for all private lets |
| 31 December 2028 | EPC C minimum for all new private lets |
| 31 December 2033 | EPC C minimum for all existing private lets |
"New tenancy" means any Private Residential Tenancy created on or after 31 December 2028, including renewals where a new PRT is issued and re-lets of the same property.
What this means in practice
If you have a long-term tenant in a D-rated property who signs a new PRT in 2029, the property must have reached EPC C before the new tenancy can begin. "Long-term tenant" doesn't exempt you from the 2028 deadline for new tenancies.
If the same tenant continues in an existing tenancy that started before 31 December 2028, you have until 31 December 2033 — but only if the tenancy is genuinely continuous with no new PRT issued.
Try it yourself
Model how EPC upgrade costs affect your Scottish BTL yield and tax position.
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Scotland's new Heat Retention Rating
This is new and not widely understood. Scotland is introducing a Heat Retention Rating (HRR) alongside the traditional EPC from 2026.
What the HRR measures
The existing EPC measures energy efficiency — how much energy a building uses. The HRR measures something different: how well the building envelope retains heat once heated. A building with poor heat retention warms up slowly and loses heat quickly when heating turns off, leading to discomfort and higher bills even in an "efficient" building.
The HRR is particularly relevant for Scotland's older stone-built properties. A solid stone tenement flat may have a decent EPC rating due to modern boiler and controls, but a poor HRR because stone walls retain heat differently from modern insulated properties.
How HRR affects landlords
The Scottish Government has indicated that the HRR will be an additional disclosure requirement on EPCs — landlords will need to show both the EPC rating and the HRR to prospective tenants. Whether HRR will eventually become a separate minimum standard (like EPC C) is not yet confirmed.
For now, landlords should be aware that:
- A new EPC assessment from 2026 will include the HRR
- Existing EPCs won't automatically include HRR — reassessment will be needed
- Tenement landlords should consider HRR as part of their upgrade planning
Current EPC ratings across Scottish rental stock
Scotland has a particular challenge with its housing stock:
| EPC Rating | Approx % of Scottish private rented homes |
|---|---|
| A/B | ~5% |
| C | ~35% |
| D | ~38% |
| E | ~15% |
| F/G | ~7% |
Approximately 60% of Scottish private rented properties are currently below EPC C, meaning most landlords have work to do before 2028.
Scotland's older housing stock — particularly tenements built before 1919, solid stone rural properties, and pre-war housing in smaller towns — poses the greatest challenge. These properties often have solid rather than cavity walls, making insulation significantly more expensive.
The path from D to C: what improvements are needed?
The cheapest route to EPC C depends on your property's current rating and construction type.
For cavity-walled properties (most post-1920s housing)
| Improvement | Typical cost | EPC rating impact |
|---|---|---|
| Cavity wall insulation | £500–£1,500 | Often +5–15 points |
| Loft insulation (if accessible) | £300–£600 | +5–10 points |
| Smart heating controls | £200–£600 | +2–5 points |
| Double glazing (if single) | £3,000–£8,000 | +3–8 points |
| Boiler replacement (old to A-rated) | £2,000–£4,000 | +5–10 points |
For many cavity-walled D-rated properties, cavity wall insulation + loft insulation + boiler upgrade costs £3,000–£6,000 and is sufficient to reach EPC C.
For solid-walled properties (tenements, stone-built rural, pre-1920)
| Improvement | Typical cost | EPC rating impact |
|---|---|---|
| Internal wall insulation | £5,000–£15,000 | +10–20 points |
| External wall insulation | £8,000–£25,000 | +15–25 points |
| Heat pump installation | £8,000–£15,000 | +10–20 points |
| Draught-proofing | £200–£500 | +2–5 points |
For solid-walled properties, reaching EPC C is significantly more expensive — internal wall insulation reduces room sizes, and external insulation on tenements requires agreement from all owners (through the factoring arrangement). Many solid-walled Scottish properties cannot cost-effectively reach EPC C, which is why there are exemptions (see below).
Shared tenement roofs
For tenement flats, roof insulation requires agreement from all owners in the block, typically managed through the factor. This can make improvement projects slow and expensive. Start conversations with your factor and other owners now — 2028 is not far away.
Try it yourself
Factor upgrade costs into your yield calculation — including the tax deductibility of improvement works.
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Grants and funding for EPC upgrades
Warmer Homes Scotland
The Warmer Homes Scotland scheme provides free energy efficiency improvements for qualifying households — primarily owner-occupiers and private tenants on low incomes or benefits. Landlords themselves don't usually qualify for Warmer Homes, but tenants in your property may qualify — and if the work is done through Warmer Homes, it improves the EPC at no cost to you as the landlord.
Ask your tenants if they'd like to apply to Warmer Homes. The scheme is accessed through Home Energy Scotland: 0808 808 2282.
Home Energy Scotland loans
Landlords can access interest-free loans of up to £7,500 (or up to £17,500 for properties in rural/island areas) through the Home Energy Scotland loan scheme for EPC-related improvements. These are genuine 0% interest loans, not grants.
Apply at: energysavingtrust.org.uk/scotland
ECO4 scheme (UK-wide)
The UK Government's ECO4 scheme (Energy Company Obligation) funds improvements for private tenants on low incomes. Your tenant's eligibility may unlock funding for your property. Contact your energy supplier or a Trustmark-accredited installer.
Capital allowances and tax deductibility
EPC improvement works to a rental property are generally:
- Revenue expenses (repairs and maintenance): deductible in the year incurred
- Capital expenses (major improvements): subject to capital allowances
Work that replaces like-for-like (e.g. replacing an old boiler with a new one) is revenue expenditure — fully deductible against rental income in the year. Major structural improvements (external wall insulation) are typically capital and may be added to the property's cost base for CGT purposes rather than deducted immediately.
Seek advice from a tax adviser on how specific works are treated. The distinction matters significantly at Scottish Higher (42%) and Advanced (45%) rates.
Exemptions from the EPC C requirement
Not every property must reach EPC C. Exemptions apply where:
- All relevant improvements have been made — the property has had every cost-effective improvement (payback under 7 years at current fuel prices) but still can't reach C
- Technical impossibility — for example, external insulation requires planning permission that was refused
- High cost — improvement costs exceed a cost cap (currently £5,000 for England; Scotland's cap is still being finalised)
- Listed buildings or conservation areas — where the improvements would unacceptably alter the character of the building
- Third-party consent refused — shared walls, common areas, or tenement roofs where other owners won't agree to works
How exemptions work: You register the exemption on the PRS Exemptions Register (Scotland) with supporting evidence. An exemption lasts 5 years; after that you must reassess.
The enforcement risk
The Scottish Government has indicated it plans to enforce the EPC C deadline through the landlord registration system and the First-tier Tribunal. Specific enforcement mechanisms include:
- Landlord Registration conditions — letting below EPC C after the deadline could become grounds for refusing or revoking registration
- Tribunal applications by tenants — tenants may be able to refer non-compliant properties to the Tribunal
- Fines — the framework for penalty notices is being developed
Enforcement is likely to be reactive initially (complaint-driven) rather than proactive (mass inspection). But landlords who ignore the deadline risk becoming non-registrable — which makes continued letting impossible.
Frequently Asked Questions
I have a tenant on a long PRT — do I need to upgrade before 2028?
If your tenant's PRT is continuous from before 31 December 2028, you have until 2033. However, if a new PRT is issued (e.g. a periodic joint tenancy becomes individual, or you grant a new agreement), the 2028 deadline applies. The safest approach: aim for C before 2028 regardless.
My tenement flat is solid stone — can I realistically reach EPC C?
Possibly, but not cheaply. Internal wall insulation, heat pump installation, and triple glazing can get many stone tenements to C, but costs can exceed £15,000–25,000. If you can demonstrate the cost-effective improvements have been done and C is still unachievable, an exemption may apply.
Can I claim improvement costs against my rental income tax?
Revenue improvements (replacing like-for-like) are generally deductible against rental income in the year. Capital improvements add to your property's base cost for CGT. The distinction is fact-specific — get advice from a tax adviser familiar with Scottish property tax.
What EPC rating does my property have?
If you don't have a current EPC, commission one from an accredited domestic energy assessor. Check the Scottish EPC Register at epcregister.com for existing certificates. An EPC assessment costs £60–£120.
What happens if I let a property below EPC C after the deadline?
The enforcement framework is still being finalised but is expected to include: inability to register new tenancies, potential tribunal referrals, and fines. The practical risk is significant — don't plan to ignore it.
Related Articles
- Landlord Insurance Scotland — insurance implications of Repairing Standard compliance
- Private Residential Tenancy Landlord Guide — full PRT obligations
- Buy-to-Let Tax Scotland — tax treatment of improvement costs
- Section 24 Mortgage Interest at Scottish Rates — other major cost pressures on Scottish landlords
- Warmer Homes Scotland — grants available for your tenants
This article is for informational purposes only and does not constitute financial, tax, or legal advice. EPC requirements are subject to change — always verify current standards with the Scottish Government, Home Energy Scotland, and Revenue Scotland before making investment decisions.
Sources: Scottish Government — Private rented sector EPC requirements, Home Energy Scotland — Landlord support, Scottish EPC Register