Offices Nationwide 

Bristol - Water Calculations - 0117 212 0189

The office that covers this area is: Cardiff

Phone Number: 0117 212 0189 Email:

Bristol Water Efficiency Calculations The Requirement G2 and Regulation 36.

If you are building a new dwelling or forming a dwelling by material change of use in Bristol you are required by building regulations Part G to design the appliances to use no more than 125 Litres of water per person per day.

This part of the building regulations states "Reasonable provision must be made by the installation of fitting and fixed appliances that use water efficiently for the prevention of undue consumption of water". This methodology is in support of The Code for Sustainable Homes, May 2009 onwards and the Building Regulations 2000.

  • Code for Sustainable Homes (Level 1/2) 120 litres/person/day
  • Code for Sustainable Homes (Level 3/4) 105 litres/person/day
  • Code for Sustainable Homes (Level 5/6) 80 litres/person/day

TheBristol Council can set their own targets for water consumption - though if you are doing these calculations as part of a Code for Sustainable homes assessment, you may be required to use no less than 80 litres per person, per day.

We can provide same or next day turn around on all Water Calculations, all you need to do is provide us with all of the information for the fittings. We even provide you with an easy to understand checklist to help you know what information is required!

If you would like a quote for Water Calculations / Water Calculations call one of our regional offices and speak to one of our experts on 0117 212 0189 for a formal quotation or email

Our other services include:
Air Leakage Testing, Sustainability Statements, Energy Statements, SAP Calculations (TER/DER), SAP Extension Calculations, Acoustic Testing, Thermography, On Construction EPC, Code 4 Sustainable Homes, Part F Ventilation Testing, Part E, Environmental Noise, SAP Conversion Calculations,

Water Calculations can also be known as:
Water Usage Calculation, Part G Water Calculation, Part G Water Calc, Part G,

E2 Specialist Consultants
February 18 at 2:17pm
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