Regulation explainerReal Estate
Building performance standards compliance across the EU, England and Wales and New York
Building performance standards compliance means proving, building by building, that a property meets a legal floor for energy rating or carbon emissions, and showing a credible plan to stay above it as the floor rises. The three regimes many international portfolios meet first measure different things: modeled energy class in the EU, an EPC band for lettings in England and Wales, and metered emissions in New York. The evidence and the retrofit plan have to fit each one.
On this page
- How to read this regulatory summary
- Asset ratings versus operational ratings: why the metric decides the work
- Three regimes that set minimum standards for existing buildings
- What each regime measures, and what an owner has to prove
- Operational data a compliance model needs for each building
- Turning metered data into a gap-to-limit plan
- Retrofit timing, transition pathways and where AI fits
- A hypothetical portfolio with buildings in Paris, London and New York
- Questions and answers
- Sources
How to read this regulatory summary
Asset ratings versus operational ratings: why the metric decides the work
An asset rating models how a building should perform under standard occupancy, using its fabric, plant and lighting. Energy performance certificates are asset ratings. They change only when the building or the assessment method changes, so compliance work is about physical measures and a fresh certificate.
An operational rating uses what the building actually consumed. It moves with occupancy, opening hours, tenant equipment, weather and how well the plant is run. A building can hold a good certificate and still exceed an emissions cap because a data-center tenant runs around the clock, or the reverse.
Mixed portfolios usually face both. The practical consequence is two evidence chains: certificates and assessor inputs for asset-rated regimes, and a reconciled record of metered energy by fuel, floor area and occupancy for operational ones. Treating them as one spreadsheet is where most compliance errors begin.
Three regimes that set minimum standards for existing buildings
Directive (EU) 2024/1275 on the energy performance of buildings (recast)
European Union, through national lawApplies whenA building sits in a member state once that state has transposed the directive; the transposition deadline is 29 May 20262.
- Minimum energy performance standards for non-residential buildings, set so the worst-performing 16% of the national stock must improve from 2030 and the worst 26% from 20332.
- A national trajectory to cut average primary energy use in residential buildings by at least 16% by 2030 against 20202.
- Zero-emission standards for new buildings, from 1 January 2028 for those owned by public bodies and 1 January 2030 for all others2.
- Energy performance certificates on a common A to G scale, with A reserved for zero-emission buildings2.
- Building automation and control systems in non-residential buildings with heating or cooling systems above 290 kW by the end of 2024, falling to 70 kW by the end of 20292.
The Energy Efficiency (Private Rented Property) (England and Wales) Regulations 2015 (SI 2015/962)[^3]
England and WalesApplies whenA landlord lets domestic or non-domestic property that is legally required to have an EPC34.
- Non-domestic: since 1 April 2023, a property below EPC E may not continue to be let, even with no change of tenancy, unless a valid exemption is registered on the PRS Exemptions Register4.
- Enforcement by local weights and measures authorities, which can serve compliance notices and financial penalties4.
- Domestic: the government's January 2026 response confirmed a move to an EPC C equivalent for all private tenancies by 1 October 2030, with secondary legislation still to be made5.
- Non-domestic tightening beyond E has been consulted on but not confirmed, so plans should carry it as a scenario rather than a date.
New York City Local Law 97 of 2019, known as LL97 (Administrative Code Article 320)[^6]
New York CityApplies whenA single building exceeds 25,000 gross square feet, or two or more buildings on one tax lot together exceed 50,0006.
What each regime measures, and what an owner has to prove
| Question | EU EPBD recast | England and Wales MEES | NYC LL97 |
|---|---|---|---|
| Metric tested | Modeled primary energy and EPC class, as transposed nationally | EPC band (an asset rating) | Reported annual emissions per square foot (operational) |
| When it bites | At national milestone dates for the worst stock | At letting, and for every current non-domestic let | Every reporting year |
| Evidence | Valid EPC and assessor inputs; system inspection records | Valid EPC or registered exemption with supporting evidence | Utility and meter data by fuel, floor areas and occupancy, professionally signed off |
| Tenant data needed | Limited; asset rating is landlord-led | Limited; asset rating is landlord-led | Essential; tenant electricity sits inside the building total |
| Main lever | Fabric, heating and cooling plant, controls | Measures that move the EPC band | Electrification, efficiency and operations, plus fuel mix |
Boston's Building Emissions Reduction and Disclosure Ordinance takes a similar operational approach, with annual reporting and emissions standards that begin in 2025 or 2030 depending on the building7.
Operational data a compliance model needs for each building
Collect these once, with an owner and a refresh frequency for each, and every regime above can draw on the same record.
Turning metered data into a gap-to-limit plan
Reconcile and clean consumption
Match meters to buildings, fill gaps from interval data rather than estimates, and flag anomalies such as reversed meters or double-counted supplies.
Normalize for weather and occupancy
Separate genuine performance change from a mild winter or a vacant floor, so trend lines are not misleading.
Apply regime-specific factors
Convert energy to the metric each regime tests, using its own coefficients or calculation method, never one global factor.
Project the gap year by year
Compare each building with its limit or required class at every milestone, including scenarios for unconfirmed tightening.
Sequence measures against lease events
Schedule intrusive works at vacancy, break or plant end-of-life, and controls and tuning immediately.
Lock the audit trail
Keep source files, transformation steps and approvals so any reported figure can be traced back to a meter or bill.
Retrofit timing, transition pathways and where AI fits
Regulatory floors are only part of the picture. Many owners also test assets against the CRREM decarbonisation pathways, which translate a climate scenario into building-level intensity targets and a year in which an asset falls out of alignment8. Running both views on the same data shows which buildings face a legal deadline and which face a valuation or financing question first.
Machine learning helps in specific places: detecting meter anomalies and estimated bills, forecasting consumption under different occupancy, and finding plant that runs outside schedule. On the hub, ColdAI describes smart building systems for HVAC, lighting and maintenance and energy and carbon reporting tied to operations1. The compliance calculation itself should stay deterministic and reviewable; models inform the retrofit plan, not the reported figure.
A hypothetical portfolio with buildings in Paris, London and New York
Questions and answers
Do commercial tenants have to share their energy data with landlords?
Not generally by default; it depends on the lease and local rules. Where a regime tests whole-building operational emissions, as LL97 does, the owner reports regardless and needs tenant consumption to do it, often through utility aggregation or sub-metering. Green lease clauses that oblige data sharing and cooperation on works are the most reliable route, and are easiest to add at renewal.
What happens if a let commercial property in England fails MEES?
For every current non-domestic let, a landlord may not continue letting a property rated below EPC E unless a valid exemption is registered. Local weights and measures authorities enforce the rules and can issue compliance notices and financial penalties. The usual responses are works that lift the rating, a new EPC once works are done, or a registered exemption where one genuinely applies.
Does a good EPC protect a New York building from LL97 penalties?
No. LL97 tests reported annual emissions, not a modeled rating, so how the building is actually operated and what fuels it uses decide compliance. An efficient envelope helps, but long operating hours, intensive tenant equipment or fossil-fuel heating can still push emissions above the limit.
When will EU member states publish their building performance thresholds?
Each member state sets its own non-residential thresholds and residential trajectory as part of transposing the recast directive, and national timetables differ. Owners should track the national transposition law and building renovation plan for each country, and meanwhile collect EPCs and consumption data so assets can be ranked against the thresholds as soon as they appear.
Sources
- AI and DLT for real estate: smart building management and ESG reporting — ColdAI
- Directive (EU) 2024/1275 on the energy performance of buildings (recast) — EUR-Lex · checked 10 October 2026
- The Energy Efficiency (Private Rented Property) (England and Wales) Regulations 2015 — legislation.gov.uk · checked 10 October 2026
- Non-domestic private rented property: minimum energy efficiency standard – landlord guidance — GOV.UK · checked 10 October 2026
- Improving the energy performance of privately rented homes: 2025 update (consultation outcome) — GOV.UK · checked 10 October 2026
- Local Law 97: greenhouse gas emissions reductions — NYC Department of Buildings · checked 10 October 2026
- Building Emissions Reduction and Disclosure (BERDO) — City of Boston · checked 10 October 2026
- CRREM pathways and Pathway Explorer — CRREM Foundation · checked 10 October 2026