Part G - Water Efficiency Calculations

Water Efficiency Calculations carried out Nationwide

If you need Water Efficiency Calculations, call us to book in your appointment.  Water Efficiency Calculations can only be issued by trained and qualified inspectors.

We pride ourselves on our customer service, we believe it is important to be polite, considerate and on time when we enter a customer’s property.  You can rely on us to have your calculations ready quickly when you need it.

What is are Water Efficiency Calculations?

The Code for Sustainable Homes and Building Regulations require Part G Water Calculations to assess the water performance of a property in terms of estimated water consumption per person per day.

This is measured in accordance with water performance targets stated in the Building Regulations Part G, and highlights ‘water consumption shall be no greater than 125 litres/person/day’. It is calculated by reviewing the flow rates of water features in a property.

Calculations are made to correspond to the ‘Water Efficiency Calculator for New Dwellings’, which is available here to view.

How quickly can I have my Water Calculations?

It depends on the size of your property however, on average it takes about 1-2 days to complete your calculations.  We will require a full set of plans and details of the water appliances.


I have been using Assessment Hive for quite some time now. I find them very friendly, efficient and would definitely recommend their services to others”.
Savvas Eracleous, E & M Solicitors


“Amazing professional service everytime! extremely friendly and helpful staff, reports are done fast and to a high standard. Here at Platinum Estates, we highly recommend this company.”
Lory Godfrey, Platinum Estates


“Amazing service each and every time we instruct! extremely friendly and helpful staff.  I had an urgent Air Test and this was carried out the next day and certificates issued that day, I cant thank you enough”
M Mehmet, Property Developer

4 simple steps when ordering from us

Get a Quote

Call us or get a free quote online. We are happy to answer any questions you have.

Book It

Once you let us know what you need your case will be assigned to one of our fully trained assessors.

Assess It

If an appointment is needed, your assessor will meet with you or any third party at the property.

Report It

When the assessments have been completed, we will send you the completed reports by email or post.

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