Water Usage Calculations for Residential Developments

Under Part G of the Building Regulations, water usage calculations are a requirement for new residential developments, conversions, and some extensions. It specifies that dwellings must have a projected consumption of no more than 125 litres of water per person, per day. Prop Cert can help you reach acceptable levels of water usage in your building. We have been in the industry since 2010 and have helped a lot of residential developments like yours meet government standards. Book a consultation today.

Water Usage Calculations for Residential Developments

Water Efficiency Calculator for New Dwellings

The government uses its water efficiency calculator for new dwellings methodology for evaluating residential projects. This is in support of The Code for Sustainable Homes and the Building Regulations. We use the same methodology in calculating water usage in your project. The results will be in litres per person, per day. Once done, we will give you a copy of the computations which you can use to adhere to regulation. If your development doesn’t get a pass the first try, we will also give you adjustment recommendations to make your fittings more efficient and help you pass your next calculation.

Water Efficiency Calculator for New Dwellings

Factors to be Considered

Here are some of the considerations when calculating the water usage of a residential development:

  • The rate of water flow in taps and showers
  • The Bath capacity
  • The consumption of dishwashers
  • The flushing capacity of water closets
  • The use of on-site greywater or rainwater harvesting
  • The use of washing machines per kg of dry load

More than the government mandate, assuring water efficiency increases the sustainability qualities of your property. Increasing number of buyers and renters are considering this, too.

Factors to be Considered

  • Code C1 (\'Danger Present\') - Anybody using the faulty installation is at risk. A repair must be performed as soon as possible. A qualified person must ensure the installation will be safe to use moving forward.
  • Code C2 (\'Potentially Dangerous\') - There is no immediate threat but the damage is likely to pose a threat in the future.
  • Code C3 (\'Improvement Recommended\') –The damage may not present an immediate or potential danger but would result in a significantly safer environment if remedied.

Examples of Code C1 include exposed live wires that are accessible to human touch and conductive parts that have become exposed.

Examples of Code C2 include the absence or a reliable earthing, and when a metallic pipe is used for flammable liquids like gases.

Examples of Code C3 include the absence of a \'Safety Electrical Connection - Do Not Remove\' sign, and socket outlets mounted incorrectly.

Meeting Other Requirements

With our help, your developments water usage calculations will pass government standards. We can also help increase your energy efficiency to meet other Building Regulations. We offer a range of reliable services to support property owners, developers, housing associations, and landlords adhere to legal requirements and raise the value of their properties in the process. We also provide Energy Performance Certificates, Electrical Installation Condition Reports, Asbestos Surveys, and Fire Risk Assessments.

Reach out to us to discuss how our services can benefit your project.


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