Why Are Building Regulations Changing?
The UK has committed to reaching net zero carbon emissions by 2050. Since buildings account for around 30% of the UK's total carbon emissions, improving energy efficiency in homes is a critical part of reaching this target.
Recent updates to Part L (Conservation of Fuel and Power) and Part F (Ventilation) of the Building Regulations set higher standards for how buildings are designed, built, and renovated.
Key Changes for New Builds
From June 2023, new homes must produce 31% fewer carbon emissions than under previous regulations. This is achieved through:
- Better insulation — higher U-value requirements for walls, floors, and roofs
- Improved glazing — triple glazing becoming standard
- Low-carbon heating — heat pumps or other alternatives to gas boilers
- Reduced air permeability — tighter building envelopes
- Mechanical ventilation with heat recovery (MVHR) — maintaining air quality without heat loss
These standards are sometimes called the "interim uplift" on the road to the Future Homes Standard, expected in 2025, which will require new homes to be "zero carbon ready" — producing 75–80% fewer emissions than current standards.
What About Existing Properties?
When you make significant changes to an existing property, you must also meet updated energy efficiency requirements. This includes:
- Extensions — must meet current Part L standards for insulation and heating
- Window replacements — must meet minimum U-value requirements
- Boiler replacements — new boilers must be high-efficiency condensing models
- Conversions (e.g., loft conversions, garage conversions) — insulation must meet current standards
The Future Homes Standard (2025)
The Future Homes Standard represents a major leap. Key expectations include:
- No new homes connected to the gas grid
- Heat pumps or equivalent low-carbon heating as standard
- Very high levels of insulation and airtightness
- Solar PV as a standard feature on new builds
- EPC ratings of A or B as the norm for new homes
How This Affects Property Values
Research consistently shows that properties with higher EPC ratings command higher prices. A study by the Department of Energy Security found that improving from Band D to Band C adds an average of £5,000–£8,000 to a property's value.
As regulations tighten, properties with poor energy efficiency may become harder to sell or rent, making improvements now a smart investment.
What Should Property Owners Do?
Whether you're a homeowner, landlord, or developer:
- Get a current EPC — understand where your property stands today
- Follow the recommendations — the EPC report lists the most cost-effective improvements
- Plan ahead — factor energy efficiency into any renovation or extension plans
- Stay informed — regulations will continue to tighten through to 2050
Book your EPC assessment → and get a clear picture of your property's energy performance.
