Part G Water Efficiency Blog
Practical guides, regulatory updates, and compliance tips for builders, architects, and assessors working with Approved Document G.
Part G Water Efficiency Calculations: A Complete Guide for 2024
Everything builders, architects, and assessors need to know about Approved Document G water efficiency calculations — from the 125 L/p/d mandatory target to the calculation methodology and compliance reporting.
125 vs 110 Litres Per Person Per Day: Which Target Applies to Your Project?
The difference between the mandatory 125 L/p/d target and the optional 110 L/p/d target — and how to find out which one your local authority requires.
How to Calculate Water Consumption for New Dwellings: Step by Step
A practical walkthrough of the Part G water efficiency calculation, covering occupancy, fittings, appliances, water reuse, and the normalisation factor.
Rainwater Harvesting and Greywater Recycling for Part G Compliance
How water reuse systems can help you meet the 110 L/p/d target, with practical guidance on system types, savings, and calculation credits.
Design Stage vs As Built Reports: What You Need to Know
Both reports are required for Building Control sign-off. Here is what each one covers, when to produce them, and how to manage the transition from design to construction.
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David Oldham
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