Straight answers on commercial energy compliance.

An Energy Performance Certificate rates a building's asset energy efficiency on an A to G scale, in the same way appliances are rated, and lists recommendations for improvement. EPCs are required whenever a building is sold, let or newly constructed, and remain valid for 10 years from lodgement.

No. As long as a valid EPC exists for the building it can be given to any prospective buyer or tenant. An EPC lasts 10 years, and the same certificate can be reused throughout that period unless the building is materially altered or extended.

A straightforward single-let commercial unit is typically surveyed and lodged within five to ten working days, and we run a fast-track service for transaction deadlines. Complex or Level 5 buildings requiring dynamic simulation take longer because the model has to be built from drawings and plant schedules.

The levels describe the complexity of the building and the competence required to assess it. Level 3 covers simple buildings with standard heating and ventilation, Level 4 covers buildings with more complex services, and Level 5 covers buildings whose systems cannot be represented in SBEM and must be modelled using Dynamic Simulation Modelling.

A Level 5 EPC assesses complex buildings with high-technology HVAC systems using Dynamic Simulation Modelling rather than SBEM. It is needed where systems such as chilled beams, VRF with heat recovery, atrium ventilation or complex controls fall outside SBEM's capability, and it usually produces a fairer, more accurate rating for that kind of building.

A Display Energy Certificate shows the actual measured energy use of a public building over the previous 12 months, rated A to G, and must be displayed where visitors can see it. Unlike an EPC, which rates the building's design, a DEC rates how the building is really being operated.

Public authority buildings frequently visited by the public and over 250m² of useful floor area require a DEC. Buildings over 1,000m² need a DEC renewed annually with a 7-year advisory report, while those between 250m² and 1,000m² need a DEC every 10 years.

Yes. Places of worship, temporary buildings in use for under two years, stand-alone buildings under 50m², certain industrial sites and workshops with low energy demand, and listed buildings where compliance would unacceptably alter their character can be exempt. Exemption is judged building by building, and the safest route is a short assessment before marketing.

MEES require landlords of non-domestic privately rented property in England and Wales to hold an EPC of at least band E. Since 1 April 2023 this applies to all existing let non-domestic property, not just new tenancies, so a sub-standard building must either be improved or carry a valid registered exemption.

Letting or continuing to let a sub-standard non-domestic property without a registered exemption is a breach of the MEES Regulations and local authorities can impose civil penalties based on rateable value, alongside publication of the breach. In practice the commercial risk usually bites first, through failed lettings, delayed transactions and price chips.

Government policy has signalled a tightening of the non-domestic minimum standard towards EPC C by 2027 and EPC B by 2030, subject to confirmation. Prudent asset owners are planning capital works now against those dates, because the works required to move a mid-band building to B are frequently fabric and plant replacements that only make sense at lease or refurbishment events.

We assess where every asset in a portfolio sits against current and future thresholds, model the measures that would move each one up a band, and cost them so capital can be planned against lease events. Where improvement is not cost-effective or not possible, we prepare and support the relevant exemption registration on the PRS Exemptions Register.

The main non-domestic exemptions cover measures that fail the seven-year payback test, cases where consent from a tenant, lender or planning authority is refused, situations where measures would devalue the property by more than 5%, and recently acquired properties. Exemptions must be registered on the PRS Exemptions Register with supporting evidence and generally last five years.

Improve where the works also protect value, rent and lettability; register an exemption where the payback genuinely fails and the asset is heading for redevelopment or disposal. Exemptions are a five-year pause rather than a solution, so we model both routes and compare them against the likely 2027 and 2030 thresholds before recommending one.

SBEM, the Simplified Building Energy Model, is the government's approved methodology for calculating the monthly energy use and carbon emissions of a non-domestic building from its floor area, fabric, conditioning, hot water and lighting. For new buildings it is used to demonstrate compliance with Part L of the Building Regulations at design stage and again as built.

A design-stage BRUKL is required before work starts to show the proposed building complies, and an as-built BRUKL plus the new-build EPC is required at completion to reflect what was actually installed. Building control will not sign off without the as-built submission, so late design changes must be fed back into the model.

The 2021 edition tightened target emission rates substantially for non-domestic buildings, introduced a primary energy target alongside carbon, brought in tougher fabric and services standards, and added photographic evidence requirements for as-built compliance. It is a staging post towards the Future Buildings Standard, so schemes designed to the old edition rarely pass unchanged.

An Energy and Sustainability Statement is a planning document that sets out how a development meets local and national carbon reduction policy, usually following the be lean, be clean, be green, be seen energy hierarchy. Most London boroughs and many other authorities require one before determining a major application.

Ideally at RIBA Stage 2, while orientation, glazing ratios, fabric strategy and plant selection are still open. Energy advice introduced after Stage 4 can usually only add cost, because the cheap carbon savings are locked into decisions already made.

Dynamic Simulation Modelling is a computational method that simulates a building's performance hour by hour across a full year using real weather data, occupancy patterns and system behaviour. It predicts energy consumption, thermal comfort and indoor conditions far more accurately than steady-state tools, which is why it underpins Level 5 EPCs, TM52, TM54 and Part L compliance for complex buildings.

Thermal modelling simulates how heat moves through and around a building so you can see where fabric performance, solar gain or system sizing is causing problems. It identifies where insulation or glazing specification should change, whether spaces will overheat, and where heating and cooling plant is oversized and costing money.

TM52 is the CIBSE methodology for assessing overheating risk in naturally ventilated, non-domestic buildings using three adaptive comfort criteria applied to a full year of simulated data. Planning authorities increasingly require a TM52 assessment to show a scheme will remain comfortable without resorting to mechanical cooling.

TM54 predicts a building's real in-use energy consumption, including small power, catering, lifts, server rooms and out-of-hours operation, none of which appear in a Part L compliance model. It exists to close the performance gap between the regulated figure and the energy the occupier will actually pay for.

DSM and Level 5 EPCs give a far more detailed and accurate picture of how a complex building actually uses energy, so investment decisions are made against real behaviour rather than a simplified proxy. On large or highly serviced assets that regularly avoids specifying measures that would not have paid back, saving significant capital expenditure.

An EPC is an asset rating that models a standardised pattern of use, while your bills reflect real occupancy, hours, equipment and behaviour. A building can hold a good EPC and still perform badly in use, which is exactly the gap a DEC or a TM54 operational energy assessment is designed to expose.

In Scotland, owners of non-domestic buildings over 1,000m² must produce an energy performance Action Plan when selling or letting, unless the building meets 2002 building standards or better. The Action Plan identifies the building's emissions and sets out the physical improvement works required, which must then be carried out within 3.5 years or deferred by annual operational ratings.

Our Section 63 Advisors assess the building's energy performance, produce the Action Plan identifying the improvement works required, and lodge it on the Scottish EPC Register. We then advise on whether to implement the works or to defer through the annual operational rating route, based on which is commercially sensible for the asset.

MEES as drafted applies to England and Wales only. Scotland regulates non-domestic energy performance principally through Section 63 Action Plans and its own building standards, while Northern Ireland operates its own EPC regime under separate legislation, so a UK-wide portfolio needs three parallel compliance tracks.

Being regulated by the Royal Institution of Chartered Surveyors means we work to a mandatory professional standard covering competence, ethics, complaints handling and professional indemnity cover. For clients it is external assurance that our advice is independent and accountable, not marketing.

We are regulated by RICS and accredited through Quidos and Elmhurst Energy for non-domestic energy assessment, hold SafeContractor approval for site work, and are a certified Quality Promise member. Assessments are lodged under the appropriate scheme for the certificate type and building complexity.

Yes. We are a national commercial energy consultancy working across England, Wales, Scotland and Northern Ireland, operating from offices in London and York with assessors deployed to site anywhere in the UK. Portfolio instructions are managed centrally so a national landlord deals with one team rather than regional subcontractors.

Every building is different, so we start by understanding the asset, its occupancy and the commercial decision behind the instruction before recommending an approach. Clients deal directly with the assessor or engineer doing the work, and long-running portfolios keep the same named team.

We treat compliance as the floor rather than the goal, using each statutory instruction as a point of evidence for a wider decarbonisation pathway. That means every EPC, Part L model or Action Plan we produce is written so it can also inform capital planning, net zero targets and investor reporting.

Fees depend on floor area, building complexity, the level of assessment required and how much drawing and plant information already exists, so we price each instruction rather than quoting a flat rate. Portfolio and framework instructions are priced at a lower per-asset rate, and we will always tell you if a cheaper level of assessment is sufficient.

For most non-domestic assessments we need floor plans and elevations, details of the heating, cooling, ventilation and lighting systems, any construction or refurbishment specifications, and access for a site survey. Where drawings are missing we can measure and record on site, which adds time but not complexity.