MEES Assessment For University


The lease for a University’s property was due for renewal. Under the Minimum Energy Efficiency Standard regulations (MEES), the lease renewal could not be legally completed until an Energy Performance Certificate (EPC) rating of E or above was achieved. The EPC rating was an F130 and so fell below the minimum requirement.


The University was keen to quickly identify potential compliance route options, assess costs and at the same time identify further carbon saving opportunities.


The University asked energy compliance advisors arbnco to carry out a MEES Assessment.

arbnco used specialist software to analyse the building model created at the time of the EPC survey carried out in the previous year. No alterations had been made to the building during the intervening period.

The model was uploaded to the arbn estates platform for analysis and the following 4 reports were automatically generated:

  • Data Verification Report – Assessment of data quality in the building model
  • Building Report – Summary of zones, construction, HVAC, lighting and re-simulated EPC rating
  • Improvement Measures Report – Overview of individual improvement options
  • MEES Report – Options appraisal of costed retrofit strategies

Comparison of MEES Compliance Routes

The Assessment included 8 costed energy improvement measures and generated 4 costed compliance route options ranked in order of investment cost:

Compliance Route Investment Cost Impact on EPC Rating
Option 1 £0 F130 to E123
Option 2 £2,302 to 2,992 F130 to E120
Option 3 £21,200 to 27,556 F130 to D88
Option 4 £50,137 to 65,180 F130 to D86

For the purpose of achieving immediate compliance, the software demonstrated that a re-simulated EPC rating of at least E123 was achievable simply from an updated survey  and model using the updated version of SBEM. Thus, the lowest cost compliance route would involve no capital works (Option 1 in the above table).

Options 2, 3 and 4 each contained a number of costed improvement measures with expected energy cost savings, kWh reduction and carbon savings. The optimal EPC rating achievable was confirmed as a D86 (Option 4).


The MEES Assessment provided clear and specific guidance on the compliance options to inform the University’s decision-making process.

As a result an updated survey and EPC was commissioned. The arbnco assessor carried out a thorough survey and data collation process including liaising with the University to obtain detailed information on the air-conditioning system.  As a result, the re-modelled EPC rating was improved from the anticipated E123 rating to a D97.

The EPC was lodged making the property fully MEES compliant. This enabled completion of the lease renewal.

The D rating also provided the University with a degree of protection against potential future raising of the legal minimum standard.

As an additional output, the University was provided with a register of potential energy projects to share with the tenant and to feed into the wider carbon reduction programme across the campus. The total potential carbon saving was around 31%.


  • MEES compliance achieved quickly and cost effectively with no capital works
  • University able to proceed with lease renewal
  • Enhanced resilience
  • Carbon savings of 112 tonnes / an identified in support of University’s Carbon Management Plan