Water Efficiency Calculations (Part G)
Ensure new dwellings meet legal water usage limits and achieve Building Control sign-off.
Water Efficiency Calculations (Part G)
What is it?
Demonstrates that potable water usage meets regulatory limits.
Why It Matters?
Failure to meet limits delays compliance approval.
What standards do we adhere to?
Approved Document G.
Our Process
Review plans/fixtures
Calculate projected usage
Suggest changes if necessary
Issue calculation report
Compliance Bundles
Tailored packages to simplify your safety responsibilities and save you time.
As Designed Bundle
Ideal for planning and design stage
- SAP/SBEM Calculations (Design Stage)
- Overheating Assessment (Simplified or TM59)
- Water Efficiency Calculations
- Bespoke PSI Values (where required)
Book an As Designed bundle and get priority scheduling for your As Built stage testing.
As Built Bundle
Ideal for completion and sign-off
- SAP/SBEM Calculations (As Built)
- Air Pressure Testing
- Acoustic Testing
- Ventilation Flow Rate Testing
Book an As Designed + As Built package together and save 10% on total compliance costs.
Frequently Asked Questions
How quickly can you deliver results?
Many reports and test results can be turned around within 48 hours.
Can you work alongside my design team?
Yes — we regularly collaborate with architects, MEP consultants, and contractors to ensure smooth compliance.
Do you travel nationwide?
Yes — we operate across the UK.
Can I bundle services?
Yes — bundling services saves both time and money, and we’ll coordinate testing for maximum efficiency.