Part G · Potable water use
Building Regulations Part G requires a whole-dwelling water efficiency standard of ≤ 125 litres/person/day for new build and conversions. We produce clear, compliant calculations and documentation — aligned to your SAP/EPC submission.
Why EAC South West
We turn your fixture schedules into compliant numbers and actionable advice.
We follow the official Water Efficiency Calculator for New Dwellings.
Outputs dovetail with SAP/EPC so your submission is consistent end-to-end.
We suggest cost-effective fixture/spec tweaks to achieve a pass.
Method
We’ll advise on compliant alternatives where data is missing or products need adjustment.
Checklist
Send schedules/specs electronically or by post — we’ll take it from there.
PDF, XLSX/CSV, or a simple email list is fine. We’ll confirm anything else we need.
Email fixtures & appliances or post to: EAC South West, 12 Mount Lidden, Penzance, TR18 4PA
Deliverables
Everything Building Control expects—clear, traceable, and ready to submit.
Produced using the government Part G methodology (Calculator for New Dwellings).
Fixtures and appliances with their declared flow/capacity rates, clearly listed.
Separate PDFs including a builder checklist at design stage for smooth sign-off.
Send your fixture schedule — we’ll deliver a clear, Part G-compliant report fast.
Yes — we cover Cornwall and the wider South West with fast, fixed-fee reports.
The whole-dwelling target is ≤125 litres per person per day, including an allowance for outdoor use.
Fixture/appliance flow or capacity data (WCs, taps, showers, baths, dishwasher, washing machine) plus project/occupancy basics.