Water Efficiency Calculator

Set up the site and plots

Add the certificate address, group matching plots by house type, then continue to the Part G questions.

house types

plots

Site details

These details appear on the generated certificate pack.

Full address

Postcode

Assessor name or business name

England only — this calculator produces Part G water-efficiency calculations for properties in England.

House types and plot numbers

Add one row for each house type. Ranges like 1-12 and comma-separated values are accepted.

House type reference

Plot numbers or names

0 plots in this type

Bedrooms

Part G target

Continue when complete

Add at least one house type and plot number.