Compliance
Commercial EPCs & MEES
Non-domestic Energy Performance Certificates for sales, lettings and MEES compliance — design-stage, as-built and renewals, produced under the National Calculation Methodology.
What it is
Non-domestic Energy Performance Certificates (EPCs) for sales, lettings and MEES compliance, produced under the UK National Calculation Methodology (NCM) using accredited iSBEM software.
We deliver design-stage assessments, as-built / Practical Completion EPCs, and EPC renewals when a certificate is approaching the end of its 10-year validity.
All assessments are produced by a qualified non-domestic energy assessor and lodged on the central register.
When you need it
- You are selling or letting a commercial property and need a valid EPC at the point of marketing.
- You need to ensure MEES compliance before granting or continuing a commercial lease.
- A new build or refurbishment needs a design-stage assessment to support Building Regulations Part L sign-off.
- An existing EPC has expired or is about to expire and you need a renewal lodged.
- You are running a portfolio EPC programme and need consistent, audit-ready assessments across multiple assets.
Our approach
- 1
Site survey and data capture
On-site survey to capture building geometry, fabric build-ups, HVAC, lighting and controls — or a desk-based capture from full design information for design-stage assessments.
- 2
iSBEM / NCM modelling
Build the asset in accredited iSBEM software under the current National Calculation Methodology to produce the asset rating.
- 3
QA review
Internal QA review of inputs, default assumptions and improvement recommendations before lodgement, to avoid challenge-prone certificates.
- 4
Lodgement of the certificate
Lodge the EPC on the central register and provide the lodged certificate, recommendation report and asset rating output.
- 5
MEES improvement pathway (where relevant)
Where the rating is close to or below the MEES threshold, set out the practical route to a higher rating — measures, indicative cost and rating uplift.
What you receive
Lodged non-domestic EPC
A valid, lodged non-domestic EPC ready for sale, letting or MEES evidence.
Recommendation report
The accompanying recommendation report listing improvements and their expected impact on the rating.
MEES improvement pathway
Where relevant, a clear improvement pathway showing the route to a higher rating to meet current or anticipated MEES thresholds.
Audit-ready inputs
The iSBEM model and supporting evidence retained and supplied on request, so the rating is defensible to lenders, purchasers and enforcement bodies.
Why NZC Consultants
- Accredited ESOS Lead Assessor
- Sterling Accreditation registered
- Energy Institute member
- Independent — no software resale, no kit sales
Frequently asked questions
Reference library
Related official guidance
Reference links to the standards, regulations and governing bodies that underpin this service.
EPC & MEES
Energy Performance of Buildings — guidance
GOV.UK / DESNZ
Statutory guidance on Energy Performance Certificates for commercial and domestic buildings in England and Wales.
View official guidanceEPC & MEES
Non-domestic EPC Register
MHCLG / Landmark
Official register for lodging and retrieving non-domestic Energy Performance Certificates and DECs in England and Wales.
View official guidanceEPC & MEES
Minimum Energy Efficiency Standards — non-domestic
GOV.UK / DESNZ
Statutory MEES guidance for landlords of non-domestic privately rented property, including exemptions and enforcement.
View official guidanceEPC & MEES
DESNZ MEES consultations and responses
Department for Energy Security & Net Zero
Open and closed consultations covering future EPC C/B uplifts, methodology reform and rented sector minimum standards.
View official guidanceEPC & MEES
Building Regulations — Approved Document Part L
MHCLG
Approved documents on the conservation of fuel and power for new and existing buildings, applied at refurbishment and fit-out.
View official guidanceBuilding Performance
CIBSE — technical knowledge portal
Chartered Institution of Building Services Engineers
Technical guides, TMs and application manuals covering building services design, energy and HVAC performance.
View official guidanceBuilding Performance
NABERS UK
BRE / NABERS UK
Operational energy rating scheme for UK offices, providing a measured performance benchmark complementary to EPCs.
View official guidanceBuilding Performance
CIBSE TM54 — evaluating operational energy use at design stage
CIBSE
Methodology for predicting in-use energy performance of new and refurbished buildings beyond Part L compliance modelling.
View official guidanceBuilding Performance
TM44 Air Conditioning Inspections
CIBSE / GOV.UK
Statutory inspection regime for air conditioning systems above 12 kW in England, Wales and Northern Ireland.
View official guidanceBuilding Performance
Building Regulations — Approved Document Part L
MHCLG
Conservation of fuel and power requirements applied to new build, refurbishment and material changes of use.
View official guidanceBuilding Performance
BSI — relevant British Standards
British Standards Institution
BS EN 16247 (energy audits), BS EN ISO 50001 (energy management) and related standards underpinning UK compliance regimes.
View official guidance
Technology-enabled consultancy
Independent technical advice, supported by digital tools and AI
NZC Consultants combines independent technical advice with digital tools, AI-assisted review and structured compliance workflows through NZC Portal.
NZC Portal
Structured data collection, audit-ready evidence packs, carbon calculations and portfolio dashboards.
NZC AI
AI-assisted review of EPC, MEES, ESOS, SECR, CRREM and NZCBS information, supported by expert consultant oversight.
Consultant Review
Outputs are checked and interpreted by qualified energy and carbon professionals before being used for formal advice.
Speak to an NZC Consultants assessor
Tell us about your asset or portfolio and we'll scope a commercial EPC package that fits — we'll respond within one working day.