What happens if a building gets a relatively low BER?
There is no legal penalty for getting an inferior BER for an existing dwelling. However, new dwellings must comply with the “Conservation of Fuel and Energy” Part L provisions of the Building Regulations. The impact of a lower BER on the marketability of dwellings offered for sale or letting will depend on overall housing supply, demand and other property market factors and on the availability/ price of domestic fuels.