The 2030 EPC C deadline is 4.5 years away — and the government has just been warned it may not be physically possible for landlords to comply in time. Not because of cost. Not because of complexity. Because there might not be enough qualified people to carry out the assessments.
On 30 March 2026, the National Residential Landlords Association (NRLA) published its response to the government's Home Energy Model consultation, raising a warning that is getting serious attention across the industry.
NRLA chief executive Ben Beadle said: "We recognise how crucial it is for the private rented sector to boost its energy efficiency. But the government needs to be pragmatic when choosing the steps it wants to take to make this happen. If it doesn't address the 'retrofitting skills gap' — the shortfall in those retrofitting professionals qualified to uphold EPC benchmarks — its changes to energy efficiency benchmarks are unlikely to succeed."
Five major property publications — Landlord Today, PropertyWire, Property118, The Negotiator, and Property Reporter — covered the story within 48 hours. This is not a fringe concern. Understanding what it means for your timeline matters now.
What the NRLA Is Warning About
The NRLA's concern centres on a double pressure problem that will hit the EPC assessment workforce in the next two to three years.
Pressure 1: HEM retraining. The government is replacing the current RdSAP assessment methodology with the new Home Energy Model (HEM) from the second half of 2027. While the introduction has already been delayed, its arrival is confirmed. Every domestic energy assessor (DEA) currently registered in the UK will need to retrain before they can produce a valid HEM-based EPC. That is a significant training undertaking across the entire workforce.
Pressure 2: Demand surge. At the same time, demand for EPC assessments is already rising and will accelerate dramatically as 2030 approaches. With all rental properties required to reach EPC C by 1 October 2030, every landlord who needs an upgrade will need an EPC before upgrades (to understand what work is needed), and again after upgrades (to prove the new rating). One upgrade generates two assessments.
PropertyWire confirmed the combined risk: the timeframe "could create a bottleneck if assessors must undertake retraining whilst demand for assessments increases simultaneously." Property Reporter added that "rising demand could create a bottleneck that places unsustainable pressure on an already limited supply of qualified professionals."
How Big Is the EPC Assessment Market?
The scale of demand facing the assessor workforce is substantial. According to official government statistics, 544,000 EPCs were lodged in England and Wales in the second quarter of 2025 alone — a 20% increase compared to the same quarter the previous year. Annualised, that is approximately 2.1 million assessments per year at the current run rate.
That run rate is going up, not down. With the 2030 deadline in view, landlords and owner-occupiers are beginning to act. But the demand wave has barely started.
Consider the upgrade pipeline alone. Our analysis of the full UK EPC register shows that 55.3% of rental properties currently sit below EPC C. Every one of those properties that carries out upgrade works will need a new EPC assessment to confirm the improved rating. The assessment market does not just scale with the number of properties — it scales with the number of upgrade projects, and millions of those are yet to begin.
⚠️ The reassessment multiplier is often overlooked. Landlords planning for 2030 typically budget for the upgrade work itself, but not always for the post-improvement EPC assessment. Every grant claim (BUS, ECO4, Warm Homes Local), every mortgage reassessment, and every MEES compliance check requires a fresh, lodged EPC certificate. Each of these generates an additional assessor booking. The total market demand is far larger than the number of properties that need to improve.
Why the HEM Transition Makes the Shortage Worse
The incoming Home Energy Model is significantly more complex than RdSAP, the current assessment methodology. Where RdSAP relies on standard assumptions for many property characteristics, HEM requires assessors to collect more detailed data on-site: fabric performance metrics, heating system specifications, smart readiness indicators, and more.
In practical terms, each HEM assessment will take longer per property than the current RdSAP equivalent. Assessors who currently complete 4–6 assessments per day may find their throughput drops under the new methodology. A smaller number of assessments per day, from the same workforce, means lower total market capacity even before accounting for the retraining gap.
PropertyMark warned as early as June 2025 that "EPCs are likely to become more expensive as assessors will need to spend more time on collecting data and producing reports" under the new system. The cost implications are not speculative — they are the direct consequence of a more intensive methodology.
What This Means for Landlords: Timeline and Costs
Current situation (2026): EPC assessments typically cost between £60 and £120 for a standard residential property. Lead times in most urban areas are currently around one to two weeks. In some rural areas, lead times are already longer due to thinner assessor coverage.
The 2028 crunch point: Based on historical patterns — including the Green Deal era rush in 2012–2014 — compliance-driven demand spikes typically begin 18 to 24 months before a hard deadline. For a 1 October 2030 cut-off, that points to mid-to-late 2028 as the point where assessor capacity comes under acute pressure.
What to expect from 2028 onwards:
- Lead times extending from weeks to potentially months in high-demand areas
- Assessment costs rising as supply struggles to meet demand
- Regional imbalance worsening — rural areas and parts of the North will feel the squeeze earlier than London and the South East, where assessor density is higher
- Assessors prioritising bulk commercial clients (housing associations, letting agents with large portfolios) over individual landlords
Upgrade costs already vary significantly by region, and the same regional inequality will apply to assessment availability.
5 Things Landlords Should Do Now
The practical response to the assessor shortage isn't complicated, but it requires acting before the crunch arrives — not during it.
1. Book a baseline EPC assessment in the next 6 months. Even if your property already has a valid EPC, a fresh assessment gives you an accurate starting point under current RdSAP — useful before HEM changes the picture in 2027. Lead times are manageable now.
2. Understand your current rating before planning. A current rating tells you whether you face a small step (D to C, often achievable for £1,000–£5,000) or a bigger challenge (E, F, or G). If you're upgrading from D to C, you may need less work than you think — but you won't know until you have a current assessment.
3. Budget for post-improvement reassessment. Every upgrade project finishes with an EPC booking. Build the time and cost of that booking into your project plan from the start. Don't leave the reassessment as an afterthought.
4. Choose your assessor carefully. Not all assessors are equally experienced or equally well-prepared for the HEM transition. Look for accreditation from Elmhurst Energy, ECMK, or Quidos, and check that they have lodged EPCs recently. Our guide to choosing a qualified EPC assessor covers everything you need to check.
5. Consider bundling assessment with retrofit advice. Some DEAs are also qualified retrofit assessors or work alongside them. A single visit that produces both an EPC and a retrofit action plan (identifying the cheapest route to C) is more efficient — and saves you waiting for two separate bookings.
FAQ
How many EPC assessors are there in the UK?
The government does not publish an official live headcount of active domestic energy assessors. There are thousands registered across the three main accreditation bodies (Elmhurst, ECMK, Quidos), but the NRLA's concern is that the existing number — even with further recruitment — will be insufficient to meet demand as 2030 approaches, particularly during the HEM retraining transition period.
How long does an EPC assessment take?
For a typical 2–3 bedroom property under current RdSAP methodology, an EPC assessment takes around 30–60 minutes on-site. The assessor will examine insulation, heating, hot water systems, windows, and lighting. Under the incoming HEM methodology, assessments are expected to take longer due to more detailed data requirements.
Will EPC assessments become more expensive before 2030?
Industry bodies including PropertyMark have already warned that the more complex HEM methodology will push costs higher. Beyond methodology, basic supply-and-demand economics suggest that cost inflation is likely as demand outpaces assessor capacity from 2028 onwards. Booking earlier is the most effective way to lock in current rates.
Do I need a new EPC after making energy improvements?
Yes. An EPC is a snapshot of the property at the time of assessment. After any significant energy efficiency improvements, you will need a new EPC assessment to reflect the changes. This is also required for MEES compliance (proving you have reached EPC C), grant claim documentation, and mortgage reassessment purposes.
What is the Home Energy Model and why does assessor retraining matter?
The Home Energy Model is the new methodology that will replace RdSAP for calculating EPC ratings. It uses four separate metrics (fabric performance, heating system, smart readiness, and energy cost) rather than a single combined score. All currently registered DEAs will need to retrain to produce HEM-based EPCs. If training demand is high and capacity is limited, a backlog is possible — another reason to use assessor capacity while it is still readily available. Read our Home Energy Model guide for the full picture.
The NRLA's warning is not a prediction of catastrophe — it is a practical observation that a workforce transition and a demand spike are converging on the same two-year window. The landlords who act before that window arrives will face lower costs, shorter waits, and a clearer upgrade path. The ones who wait until 2029 may find the combination of limited assessor availability and rising costs significantly more stressful than the compliance work itself.
Start with your baseline EPC. Read our guide to choosing a qualified EPC assessor before you book.