Part L Building regulations 2023


Everything you need to know about the Part L building regulations and how the new changes might affect you

New updates to part L building regulations – June 2023

Part L of building regulations plays an important role in improving energy efficiency and sustainability in buildings in the UK. A vital framework set by the UK government, it ensures that new and existing structures meet specific and essential criteria. The aim is to meet energy efficiency goals for reducing CO2 emissions; part of the government’s plan for 2025. 

Following an announcement in 2022, the part L building regulations were officially updated and enacted in June 2023. The idea is to make a notable leap forward in elevating standards for energy efficiency.

What are Part L building regulations and who do they affect?

Part L of the government requirement building regulations covers all newly built dwellings and existing buildings that are going through refurbishment (including extensions and conversions). It may also cover certain older buildings on a case-by-case basis.

Engineer inspecting work

It sets out a list of requirements to define the minimum standards for energy performance within a building. This covers aspects such as building materials, lighting, heat and water systems, air ventilation, and insulation.

Part L of the building regulations is divided into two parts: L1A, which covers new builds and L1B for existing properties including renovations, extensions and conversions.

What are the new regulations changes?

The revised Part L building regulations will affect all those involved in the design, construction and management of buildings. This will affect architects, developers, homeowners, landlords and energy consultants.

The new changes were officially announced in June 2022, but a deadline of June 15th 2023 was provided to give those at the planning stage time to adapt. They were introduced to improve the environmental impact of buildings in line with the UK government’s commitment to achieving net-zero carbon emissions by 2050.

These include:

The introduction of SAP 10

New SAP calculation assessment software was introduced to present a more accurate picture of energy performance. As a result, there is a significant change in how energy efficiency is calculated and assessed within a property.

Therefore, there have been updates to the measurement of fuel prices, CO2 variations, hot water consumption, lighting energy, air flow and ventilation and renewables.

Photographic evidence of construction comply with Part L Mandatory photographic evidence

It is now compulsory to provide photographic evidence as proof of compliance. This evidence needs to be taken throughout the appropriate stages of construction when each detail is completed. Failure to meet these criteria can result in EPCs not being released by assessors and non-compliance with the BREL report. As a result, the property can’t be deemed complete.

Specific PSI Values requirements 

Precise data is now required for thermal bridging calculations for better accuracy. This means the amount of heat lost through building materials, will need to be calculated correctly to ensure lower energy bills and a smaller carbon footprint. What’s more, using generic PSI values, which were acceptable before, now will be met with penalties. 

What does this mean moving forward?

The advantages of the new Part L building regulations will lead to improved energy efficiency, reduced CO2 emissions, longer-term financial savings, and increased sustainability.

Luckily, we’ve got you covered!

We’ve invested in new software and technology to help you meet the new changes and ensure you comply with the Part L building regulations. Give us a call on 01536 689007 or contact us for more details. Alternatively, click below for a free quote.