In the last few years, Part G Building Regulations have changed for all new builds, extensions and conversions. Now, if you’re a property owner or building developer, you’re legally required to prove that your property is water efficient. The means using no more than 125 litres or 105 litres of potable (drinkable) water per person per day, depending on the level of the build.

To make these calculations, experts need to consider information about baths, showers, toilets, sinks, washing machines and dishwashers.

Why are Part G
Water Calculation required?

With a rise in energy wastage in recent years, the government (national and local) are putting more pressure on property owners and building developers to be as energy-efficient as possible. This is multifaceted, but water output is an important factor in this.

Non-compliance with water efficiency measures will negatively affect SAP calculations, so the government can ensure that any inefficient new build, extension or conversion won’t be viable for sale. As we know – properties can’t legally be sold unless they pass their SAP calculations.

When do Calculations
need to be made

Part G Water Calculations should be made twice: once at the design stage and again on completion.

It’s important to have them done early on in order to prevent the fitting of inefficient features which would make the build fail its SAP calculations. For example, certain taps are more efficient than others, and you might think twice about installing the less efficient types if your build is already close to the limit. We can help you with suggestions about how to make your build more efficient, but that’s much easier to do earlier on, as we emphasized with SAP calculations.

Choose Purple Energy
for your Water Calculations?

Our experts operate nationwide and are well experienced in conducting Part G Water Calculations. We simplify the process as much as possible to ensure we get the right information to keep timelines and costs down.

If there is anything you feel unclear about or you simply want to speak to one of our team members, don’t hesitate to give our office a call.