02 · Building Regulations · Part G

Water efficiency calculations in the West Midlands

44 providers offering water efficiency calculations in or across the West Midlands, including national firms. Usually your SAP assessor or designer.

44 providersthe West Midlands
Who needs oneAnyone building a new home or converting a building into homes
Who can do itUsually your SAP assessor or designer
WhenDesign stage, confirmed at completion if fittings change

44 providers for the West Midlands

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Showing all 44 providers

Based in or covering the West Midlands (10)

National providers (check they cover your area) (34)

About water efficiency calculations

Every new home in England must be designed so that water use is no more than 125 litres per person per day. A water efficiency calculation shows building control that the taps, toilets, showers, baths and appliances you have chosen meet that limit.

Getting signed off in England

In England, your council’s building control team or a registered building control approver checks the work. They issue a completion or final certificate once they have the reports they need, such as the as-built SAP, EPC, air test and any sound or ventilation test results.

Read the full guide to water efficiency calculations →