PART G WATER CALCULATIONS
- Dean
- Feb 15, 2020
- 1 min read
Updated: Feb 17, 2023
Over the past few years, Part G Building Regulations have changed for all new homes, extensions and conversions and property owners are now legally required to comply with new water efficiency targets to ensure a truly environmentally friendly building project.
At Diland EPC, we're always up to date with such changes and are your number one choice when it comes to staying on top of Part G Water Calculations for homes and properties in the UK.

WHAT ARE PART G WATER CALCULATIONS?
As of 2010, Building Control and local councils can now legally request calculations to prove that a new build, conversion or extension will use no more than 125 litres of potable water per person per day to ensure stringent energy efficiency. This means that building developers will have to consider the types of taps, WC's, showers, baths and other water-producing appliances they'll be fitting to ensure these guidelines are met.
Why are Part G Water Calculations important?
Now more than ever, it's important for new builds, conversions or extensions to be environmentally friendly and as energy efficient as possible. With a rise in energy wastage in recent years, local councils and government encourage property and homeowners to play their part in energy efficiency and water output is a key factor.
Part G Water Calculations ensure that any building project is complying with these regulations and wasting as little energy as possible.
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