Approved Document Part L1 2021 is used to assess compliance of extensions, refurbishments and change of use developments.
Extensions or conservatories with large areas of glass more than 25% of the extended floor area will require SAP calculations to show compliance with Part L1 2021.
When making changes to a domestic building, all the new-build elements of the building must meet the latest regulations and other retained elements may also need thermal improvements.
Building services such as the heating, lighting, building fabric and hot water systems may need to be upgraded or changed to meet current standards.
A thorough understanding of the SAP regulations for extensions and renovations, and early engagement will ensure that the right building fabric and solutions are selected to keep your costs to a minimum.
What We Need From You:
- Plans – Existing.
- Section – Existing.
- Elevations – Existing.
- Plans – Proposed.
- Sections – Proposed.
- Elevations – Proposed.
- Existing Specification.
- Proposed Specification.
Please email with the above details for a quote.