An Energy Performance Certificate (EPC) rates your property's energy efficiency from A to G. Find out when you legally need one and what it means for buyers, sellers, and landlords.
An Energy Performance Certificate (EPC) is a document that rates the energy efficiency of a property on a scale from A (most efficient) to G (least efficient). It also provides an estimate of energy costs and recommendations for improvements.
In England and Wales, an EPC is required whenever a property is built, sold, or rented. It must be made available to prospective buyers or tenants at the earliest opportunity. Estate agents must display the EPC rating on property listings.
Your EPC will show your property's current energy rating, a potential rating if recommended improvements are made, estimated energy costs, and a list of improvements with potential savings.
An EPC is valid for 10 years and can be reused for multiple transactions within that period. You can check whether your property already has a valid EPC on the government's EPC register at gov.uk.
EPCs must be carried out by an accredited Domestic Energy Assessor (DEA). At Carn Energy, all our assessors are ABBE-accredited, ensuring your certificate meets the highest professional standards.
ABBE-accredited assessments with fast turnaround across Lambeth, Wandsworth, and Southwark.
Book NowWondering what an EPC costs in Lambeth? We break down current 2025 prices for domestic, landlord and retrofit assessments, and explain what affects the cost.
ECO4 has ended. The Warm Homes Plan is the government's successor scheme, with billions set aside to fund insulation and heating upgrades for eligible households. Here is what you need to know.
Most South London homes have solid walls, not cavity walls. A PAS 2035 retrofit assessment identifies the right insulation approach and unlocks grant funding.
ABBE-accredited EPC assessments across Lambeth, Wandsworth, and Southwark.
