Water Efficiency
What you need to know.​​​​​
Water efficiency calculations help predict how much water a home will use, ensuring it meets the requirements of Part G of the Building Regulations. These calculations are essential for all new homes. As sustainability becomes a bigger priority and our population continues to grow, designing homes that use water responsibly has never been more important.
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Water use is measured in litres per person per day. To comply with Part G, a property must demonstrate that its predicted consumption does not exceed 125 litres per person per day. In some areas, particularly London and the South, local authorities may impose even stricter limits as low as 110 litres.​​​
Why Choose Us?
Home+ Energy can support your project by carrying out the required Part G water efficiency calculations. We review the specifications for your planned fittings and appliances, assess the predicted water use, and provide a clear report that meets Building Control requirements. If the figures are close to the limit, we can highlight simple adjustments that help bring the design into compliance.​
Fast Turnaround
Get your report quickly so your project keeps moving.
Clear, Simple guidance
No confusing technical language, just what you need to stay compliant.
Competitive Pricing
High‑quality service without the inflated fees.
Expert Support
Need advice on meeting tighter water targets? We’ll guide you through the best options.
Be ready for now and what’s next. Home+ Energy supports you through both current SAP compliance and the transition to HEM.