Water Efficiency Calculations for New Build Dwellings
We assess sanitary fittings, flow rates and overall daily water use to confirm compliance, support Building Control approval and complete your wider SAP, EPC or compliance pack.
Building Regulations for Water Efficiency in New Homes
Part G of the Building Regulations includes water efficiency requirements for new dwellings. The purpose is to limit unnecessary water consumption by checking the expected daily use from fittings such as taps, showers, baths, WCs and other water-using appliances.
A Part G water calculation shows whether the proposed specification keeps the dwelling within the required litres per person per day target.
Choosing the wrong taps, showers, WCs or baths can cause a new dwelling to exceed the permitted Part G water use limit.
Part G Water Efficiency Calculation Pricing
| Part G Water Efficiency Calculation | Price (No VAT) |
|---|---|
| Per residential plot | Circa £50 |
Water Efficiency Checks for New Residential Projects
Water efficiency calculations are commonly required for new build homes and may be requested at design stage, as-built stage or as part of the final Building Control documentation.
They are especially important when fittings have not yet been selected, when products are changed during procurement or when the project needs to meet a stricter local planning target.
New Build Homes
Part G calculations for individual dwellings, housing developments and residential schemes.
Design Stage Checks
Early water use reviews before fittings are purchased or specifications are finalised.
As-Built Confirmation
Final calculations using installed products, flow rates and confirmed specification details.
SAP Project Packs
Water efficiency support alongside SAP, EPC and other Building Regulations documents.
Clear Part G Support for Water Efficiency Compliance
- Review of proposed or installed water fittings.
- Assessment of taps, showers, baths, WCs and appliances where relevant.
- Calculation of estimated litres per person per day.
- Check against the applicable Part G water efficiency target.
- Advice on unsuitable products or excessive flow rates.
- Guidance on alternative specifications where needed.
