Tools

Work out what Part L asks of your project before you commit

Five tools built from the way Part L work actually runs: which standard your building falls under, what a design-stage calculation needs from you, how the 2021 and 2026 standards differ, whether an extension's glazing needs a calculation, and what the work costs. None of them produces a compliance result — only a full SAP or SBEM calculation can do that.

Choose a tool

Free, no sign-up, no email wall

Part L 2026 transition checker

Enter your building control application date and your start on site, and see whether that building keeps transitional protection under the published 2026 dates.

Open transition checker

Design-stage information checklist

Build a tailored list of the drawings, specification and services information a design-stage SAP or SBEM calculation needs for your project type.

Open design checklist

Part L 2021 vs 2026 comparison

A side-by-side of the two standards as published: dates, scope and requirements, with a source against every line and nothing stated that we cannot cite.

Open 2021 vs 2026

Extension glazing area check

Enter your extension's floor area, its new glazing and the openings it removes, and see whether it stays inside the 25% allowance or needs a calculation.

Open glazing check

Part L fee guide

Pick your project type and scale for the guide fee band we quote from, and what the fee does and does not include. Every job gets a written quote.

Open fee guide

The fee bands here are the ones we quote from

Awais Sarwar, MSc — Accredited Energy Assessor

Awais is an accredited domestic and commercial energy assessor and the owner of Team EPC Ltd, which trades as Part L Consultant. He has surveyed and lodged EPCs across flats, houses, HMOs, managed portfolios and commercial premises throughout London and the Home Counties, and is currently studying an MSc in philosophy alongside running the business.

EPC Register

Accredited assessor

MSc

Built environment

MSc Philosophy

Currently studying

10+ years

London property

Part L focus

Design to as-built

Off the clock: cricket, family time, an MSc in philosophy in progress and finding London's best food.

Awais Sarwar

Founder · Accredited energy assessor

About Awais