MEES & EPC Optimisation Case Study
Client: Confidential Commercial Office & Mixed-Use
Portfolio Services: Whole-Building EPCs, DSM Level 5 Modelling, MEES Advisory, Retrofit Scenario Modelling, CRREM analysis
The Challenge
The client required a robust and future-proof approach to MEES compliance across a portfolio of commercial office and mixed-use assets. Existing EPCs were based on simplified methodologies, with inconsistencies in floor area assumptions, shared metering arrangements, and gas-based heating systems constraining EPC performance. The client also needed clarity on the impact of forthcoming 2027 EPC carbon factor updates and realistic pathways to EPC B and A ratings. We also reviewed actual energy use and mapped the Carbon Risk using CRREM tool analysis.
Our Approach
MEES Solutions undertook whole-building EPC assessments using Dynamic Simulation Modelling (DSM Level 5) in IESVE 2024. Each building was modelled individually to ensure accurate representation of building fabric, services, and operational profiles. Scenario modelling was undertaken to test cumulative improvement measures, including electrification of heating systems, lighting upgrades with advanced controls, HVAC system replacement, and renewable gas strategies. Forward-looking analysis was also completed to assess the effect of anticipated carbon factor changes on EPC outcomes.
Key Outcomes
Demonstrated improvement from historic C-rated EPCs to B-rated performance using DSM Level 5 modelling.
Identified technically viable pathways to achieve EPC A ratings through targeted system upgrades.
Showed that future carbon factor updates alone could materially improve EPC ratings, reducing compliance risk.
Enabled building-by-building EPC strategies for mixed-use sites previously assessed under a single EPC.
Value Delivered
The client received a clear, evidence-based MEES compliance roadmap that avoided unnecessary capital expenditure, improved asset value, and provided defensible EPC outcomes suitable for investor, landlord, and regulatory scrutiny. The methodology is scalable across wider portfolios and aligns EPC, carbon, and long-term decarbonisation strategy.
Why MEES Solutions
Market-leading expertise in DSM Level 5 EPC modelling, extensive experience across complex commercial portfolios, and an integrated approach to MEES, EPC, and carbon advisory.
If you’re unsure whether an EPC outcome is being driven by genuine building performance or the limitations of the methodology used, an early review can often avoid unnecessary works and future MEES risk.
Contact us to discuss EPC optimisation or Level 5 DSM modelling for your asset or portfolio.