From EPC D to B: A Commercial Industrial Unit Retrofit Case Study

Two 330m² industrial units. Starting EPC ratings of D81 and D82, comfortably below the proposed MEES Phase 2 C threshold for 2027. Through a phased retrofit programme, Vital Direct worked with a UK commercial property investor to take both buildings to a final rating of B37. This case study breaks down what was done, in what order, and what it means for commercial landlords and asset managers facing the same MEES uplift on their own industrial portfolios.

The Challenge

For commercial landlords with industrial portfolios, EPC ratings of D and below now sit on a tightening regulatory clock. The proposed MEES Phase 2 raises the minimum non-domestic EPC for letting from E to C in April 2027, with B following in 2030. The owner faced the typical pressure points:

• A pair of industrial units rated D81 and D82, on the wrong side of the proposed 2027 floor
• Real stranded asset risk if the rating did not improve before the next lease event
• Need to deliver upgrades within a commercially viable budget, in a way that preserved letting potential
• A clear preference for a low-carbon, all-electric outcome rather than incremental fixes

The Approach

Vital Direct ran a structured, data-led EPC improvement strategy in three stages.

Baseline assessment. A detailed energy survey (July 2020) established starting EPCs of D81 and D82 and identified the priority areas for improvement. The dominant issues were inefficient electric radiators, dated lighting, and below-standard thermal performance in the roof.

Scenario modelling. Multiple draft EPC reports were produced to model upgrade pathways, allowing the owner to make informed, ROI-driven decisions on which combinations of measures would land which final ratings.

Phased delivery. Rather than a single large capex round, the programme was sequenced in two phases. This kept the cost profile manageable, allowed performance gains to be evidenced at each step, and built confidence for the second phase based on actual results from the first.

The Work

Phase 1: Energy Efficiency First

A full LED lighting upgrade across both units, paired with a new insulated roofing system to lift thermal performance. These are the high-impact, lower-capex measures that always come first in a structured retrofit because they deliver the biggest EPC uplift per pound spent.

Outcome: EPC ratings improved to C65 and C64 (May 2025), already inside the proposed 2027 MEES Phase 2 threshold.

Phase 2: Electrification and HVAC Modernisation

With efficiency measures locked in, the second phase targeted the remaining drag on the EPC score: the existing inefficient electric radiator heating system. These were removed and replaced with Mitsubishi Electric Inverter heat pump split systems, which provide both efficient heating and cooling. This is the move that pushed the rating decisively into B territory.

Outcome: Final EPC rating of B37 across both units. Comfortably ahead of the proposed 2030 MEES B floor, with headroom in hand.

The Results

Phase	Measures	EPC outcome
Baseline (Jul 2020)	No upgrade. Inefficient electric radiators, dated lighting, basic roofing.	D81 / D82
Phase 1 (May 2025)	Full LED lighting upgrade. Insulated roofing system across both units.	C65 / C64
Phase 2 (final)	Mitsubishi Electric Inverter heat pump split systems installed. Inefficient electric radiators removed.	B37

What It Means Commercially

Four outcomes from the programme matter to commercial landlords and asset managers:

• MEES future-proofing. The assets are now positioned ahead of both the 2027 C and the 2030 B thresholds, taking compliance risk off the table for the next decade
• Asset value uplift. Higher EPC ratings improve marketability, rental prospects, and long-term investment performance, particularly with institutional buyers screening on energy efficiency
• Reduced operational costs for occupiers. All-electric heat pump systems materially lower running costs compared with the original electric radiators, which strengthens the lettings proposition
• ESG and Net Zero progress. The transition supports the wider decarbonisation pathway and strengthens ESG credentials, increasingly important for institutional capital

The Lesson for Commercial Landlords

Two patterns from this project apply broadly to commercial industrial portfolios facing the same MEES pressure.

Sequence matters. Doing efficiency first (LED, insulation) before electrification (heat pumps) made each phase pay for itself in EPC terms before the next phase started. Trying to do all of it in one round usually overspends on plant that the building cannot fully use until the fabric is right.

Modelling first, building second. Producing draft EPC scenarios before any physical work happens means the final rating is a known outcome rather than a hopeful one. This is what allows landlords to commit to specific MEES positions in lender or investor conversations.

How Vital Direct Helps

Vital Direct works with commercial landlords and asset managers across single buildings and full portfolios, from baseline EPC assessments through to phased decarbonisation plans. The Vital EPC Plus and decarbonisation report layers a costed pathway over the standard EPC, mapping each upgrade to its capital cost, EPC uplift, and CO2 reduction.

If You Have Similar Buildings

If you manage commercial industrial units sitting at D or below, the next two years are when the upgrade decisions get made. The earlier the assessment, the more flexibility remains on phasing, financing, and lease alignment.

To talk through a similar pathway for your portfolio, contact Vital Direct or call 0345 111 7700.