Preparing for Spring? Your 2026 Part G Compliance Checklist

As we move through February, many developers and builders are finalising plans for spring groundworks. While aesthetics and structural integrity are always top of mind, one crucial hurdle remains for every new build in the UK: Part G of the Building Regulations. 

Meeting the water efficiency standards isn’t just a "nice-to-have"—it’s a legal requirement to secure your completion certificate. At EasyWaterCalc, we’ve put together a quick checklist to help you sail through building control this season.

The Magic Numbers: 125 vs. 110

Under Part G, the standard maximum water consumption for new dwellings is 125 litres per person per day. However, it is vital to check your local planning conditions. Many "water-stressed" areas (particularly in the South East) now mandate a stricter limit of 110 litres per person per day.

Your Compliance Checklist

To ensure your project meets these targets, consider the following fixtures:

• Toilets: Dual-flush systems are now the industry standard, significantly reducing "litres per flush."
• Showers & Taps: Look for aerated fixtures or flow regulators. A high-pressure shower can easily blow your water budget if not restricted.
• Baths: The capacity of your bath to the overflow is a major factor in your calculation. Larger tubs may require stricter flow rates on taps to compensate.
• White Goods: If you are providing dishwashers or washing machines, ensure they carry a high water-efficiency rating.

Why Accuracy Matters

Building Control officers require a formal Water Efficiency Calculation to prove the design meets the target. Guesswork can lead to delays or, worse, the need to retro-fit flow restrictors after the plumbing is already finished—an unnecessary and costly headache.

Get Your Certificate in 60 Seconds

Don’t let paperwork stall your project. Our intuitive tool at EasyWaterCalc allows you to input your fixture specifications and receive a Building Regulations Compliant Water Efficiency Certificate instantly.

Ready to tick Part G off your list? Click here to start your calculation for just £25.