Part L changes, publication and implementation in 2021-22

At Building Regs 4 Plans, we’ve been preparing for the latest changes to the new Part L, set to apply from June (2022). The Government published the Future Buildings Standards consultation document in January 2021. Contained within this document were the interim Part L, Part F and Overheating Regulations for domestic and non-domestic buildings, and the first steps towards the aim to deliver Zero Carbon Ready homes by 2025.

From June 2022, all new homes will be expected to produce 31% less CO2 emissions than is acceptable in the current Part L.

The new proposals include such upgrades as:

  • Waste water heating recovery to ALL showers
  • Heating systems flow temperature to be NO more than 55° C
  • Photovoltaics – proportional to the ground floor area (e.g. 50m² GFA will require 3kW peak solar panels equal to approx. 18m² [assumed to SE/SW orientation])
  • Thermal elements U Values of:
  •              Walls 0.18
  •              Windows 1.2
  •              Floor 0.13
  •              Roof 0.11

The proposals will also encourage the installation of ground source heat pumps which will allow solar panels to be removed from the design and enable greater flexibility in the specified U-Values of the individual thermal elements.

The new Part L was published in December 2021 with an implementation date of June 2022. Developers must submit their Building Notices, Initial Notices or deposit their Full Plans application by June 2022 or comply with the new regulations set out in Approved Document L 2021.

Accessing Updated Specifications and Detail Drawings
Continuing to register with our site will mean you will always be up-to-date with latest the changes and can easily succeed in achieving building regulations approval. Our unique and easy to use system allows you to draft and submit compliant specifications (from our online library of specs) with the corresponding detail drawings, leading to a finished project in line with the latest Government legislation.

Transitional Arrangements: When to apply the changes
The Amendment Regulations and accompanying Approved Documents L: Volumes 1 and 2 come into force on 15 June 2022. However, the changes will not apply in relation to building work where a building notice or an initial notice has been given to, or full plans deposited with, a local authority before 15 June 2022 provided that the building work is started before 15 June 2023.

For more information, see:
Building Regulations Part L Updates June 2022 Transitional Arrangements

A sample of specifications and details drawings inline with the new Part L, are now available on BuildingRegs4Plans at House Extension Specifications and Detail Drawings: June 2022

Specifications and Details drawings for the June 2022 Part L updates are also available for Premium users for New Builds, Garage Conversions and Loft Conversions.

You can access our specifications by registration at Register for Access

The Future Homes Standard

The government has provided its response to the consultation for the proposed changes to Parts L and F of the Building Regulations. A timeframe has now been set out to implement the Future Homes Standard, leading the way to making new homes ‘zero carbon ready’ by 2025.

The Government has proposed that, from 2021, there will be an ‘interim uplift’ in Part L standards. This will compel all new domestic developments to produce 31 per cent lower carbon emissions than is acceptable at present. Further legislation will require 75-80 per cent less carbon emissions within four years.

By 2025, all new homes should be constructed so that ‘no further energy efficiency retrofit work will be necessary to enable them to become zero-carbon as the electricity grid continues to decarbonise’. Fossil fuel heating, such as a natural gas boilers, will also not be permissible in new homes and all new domestic housing will be subject to an overheating mitigation requirement.

Work to existing houses will also be covered by the new regulations and more energy-efficient builds will be expected. For example, thermal elements, such as floors and walls, will expected to achieve a better U-value performance than is currently acceptable and replacement windows, doors and building services will be required to be more energy-efficient.

Transitional arrangements will last for one year and apply to individual homes, rather than an entire developments.

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