An Energy Performance Certificate, or EPC, is one of the most useful documents renters can check before agreeing to rent a property. It gives an indication of a home’s energy efficiency, likely running costs, and how easy it may be to keep warm. With planned changes to EPC assessments, renters may soon get clearer information…
Common Reasons SAP Calculations Fail and How to Fix Them
SAP calculations are an important part of the building control process for new homes, conversions and some residential projects. They show whether a property meets Building Regulations Part L for energy performance, carbon emissions and energy efficiency. The main reasons SAP calculations fail include poor U-values, inefficient heating systems, weak air tightness, poor thermal bridging, unsuitable ventilation, and…
Demystifying Non-Domestic EPC Assessments: What You Need to Know
A non-domestic EPC assessment is a key requirement for anyone involved in selling, renting, or developing commercial properties in the UK. Whether you own a commercial building, manage a business property, or are preparing to let space in the private rented sector, understanding your energy performance certificate (EPC) is essential. An energy performance certificate provides…
How Sound Insulation Improves Property Value and Buyer Appeal in the UK
Good sound insulation is not just a technical requirement – it’s an important factor in how buyers assess comfort, quality, and overall value. In today’s UK property market, homes that effectively control sound transmission are often seen as more desirable, particularly in flats, terraced housing, and converted commercial buildings. Uncontrolled noise transfer between rooms or…
How to Achieve Airtightness in Buildings: Tips for Building with Air Permeability in Mind
Creating an airtight building is one of the most effective ways to improve energy efficiency, reduce heat loss, and meet current building regulations such as Part L. Whether you’re working on a new build, a commercial building, or upgrading an existing building, controlling air leakage is key to achieving good performance. Uncontrolled air leaks in…
EPC Standards for Commercial Properties: 2030 update
Energy rules for commercial buildings are becoming stricter. From 2030, it’s expected that updated EPC requirements will raise the minimum energy efficiency standards (MEES), meaning many commercial properties will need to meet higher performance levels than before. If you’re a landlord, property manager, investor, or responsible for commercial premises, it’s clear that buildings must become…
EPC for Landlords: The Complete 2026 Guide
If you’re a private landlord in England or Wales, understanding your legal responsibilities around EPCs forrental properties is essential. Energy regulations have tightened in recent years, and with further updates expected beyond 2026, staying compliant is critical to protecting your rental income. This fully updated guide explains what an EPC is, the current Minimum Energy…
2 Essential Regulations for Historic Building EPC Assessments
Historic buildings are a valuable part of the property market, but meeting energy efficiency and energy performance requirements can be complex, particularly where heritage protections and planning controls apply. This guide explains two core regulations that govern historic building EPC assessments, then covers the key laws, exemptions, and practical considerations that affect which energy efficiency…
HEM vs. SAP: What’s Changing, When It’s Changing, and What It Will Cost
Energy regulation in the UK is entering a period of transition for new homes. The long-established Standard Assessment Procedure (SAP), which assesses residential properties and produces Energy Performance Certificates (EPCs), is planned to be phased out and replaced by the Home Energy Model (HEM), a new methodology that the government intends to provide a more…
Understanding U-Values: How Windows and Doors Shape Energy Efficiency in Your Home
Windows and doors do far more than bring light and access to your home, they play a major role in how well it retains heat. Their performance is measured by one key metric: the U-Value. A U-Value shows the rate of heat transfer through a material, measured per square metre for every degree of temperature…










