Why EPCs matter for developers now
EPC ratings have gone from a box-ticking exercise to a genuine factor in property values, mortgage availability, and regulatory compliance. For developers, understanding EPC requirements affects your build specification, costs, GDV assumptions, and exit strategy.
Current requirements
New-build (for sale)
Under the Future Homes Standard, new-build homes achieve EPC A or B as standard. With heat pumps, enhanced insulation, and MVHR, most FHS-compliant homes hit EPC A. There's no legal minimum for sale properties, but building below B on a new-build would raise questions from both buyers and lenders.
New-build (for rent / BTL)
Rental properties must currently meet a minimum EPC E under MEES. The government has signalled EPC C as the future minimum for new tenancies. Developers building to rent should target EPC C as an absolute minimum, and ideally EPC B or above, to future-proof against regulation changes and maximise rental market appeal.
Conversions and refurbishments
Converted properties don't need to meet FHS new-build standards, but they must comply with Building Regulations Part L (conservation of fuel and power) for the works carried out. In practice, a well-executed conversion should achieve EPC C or above. Achieving this on older buildings can require significant investment in insulation, glazing, and heating systems.
Impact on development finance
- GDV assumptions: Properties with EPC A-B command a 3-5% premium over lower-rated equivalents. Factor this into your sales comparables — but use conservative assumptions.
- BTL refinance: If your exit strategy involves refinancing to BTL mortgages, the EPC rating directly affects which lenders will refinance. Some BTL lenders now require minimum EPC C. A low EPC can block your exit strategy entirely.
- Green mortgage premiums: Several lenders offer preferential BTL rates for properties with EPC A-B. This improves refinance terms for developers retaining units.
- Build costs: Achieving higher EPC ratings costs more (see Future Homes Standard) but the premium is offset by better values and easier exit.
What lenders want to see
Development finance lenders increasingly ask about target EPC ratings, particularly for schemes where the exit strategy involves refinancing to BTL. A clear statement of target EPC rating, supported by a SAP calculation or energy consultant's assessment, demonstrates that you've considered this properly.
Submit your project on Assesr with your target EPC specification included in the cost schedule. The AI credit paper highlights energy efficiency as part of the scheme assessment, which is increasingly valued by lenders assessing exit risk.