A Guide to Water Efficiency Incentives through the Environmental Incentives Common Framework
Since the Environmental Incentives Common Framework took effect in April 2025, the landscape of water efficiency incentives for new connections has faced a new set of rules — and financial opportunities
With climate change and population growth placing pressure on the UK’s water resources, the government remains committed to building 1.5 million new homes. However, with forecasts predicting a public water supply deficit of 5 billion litres per day by 2055, the need for sustainable building practices is urgent.
For developers in 2026, understanding how to leverage these incentives is a critical strategy for reducing infrastructure charges and boosting SAP scores.
The “New” Normal: What Changed in April 2025?
Published by Ofwat, the Environmental Incentives Common Framework shifted the industry from voluntary reviews to binding regulations.
Under this framework, all English water companies must offer water efficiency incentive payments to developers who build homes that consume less water than standard Part G Building Regulations require. These incentives are funded by a ring-fenced “environmental component” within infrastructure charges, ensuring the money is used exclusively for these payments.
Crucially, New Appointees (NAVs) are now mandated to offer the same environmental incentives and qualifying criteria as the incumbent water company, ensuring consistency across the market.
Meeting these efficiency targets now is the smartest way to future-proof your sites against the regulatory tightening expected in 2027 and beyond.
The Targets: Your Efficiency Checklist for Part G
To qualify for the standard incentives, you must generally go beyond the basic Part G requirement of 125 litres per person per day (l/p/d). The framework introduced a Common Environmental Incentive Methodology with specific maximum consumption values for fittings.
When specifying fittings for upcoming plots, these are the targets that must be met or exceeded to qualify for the common incentive:
Why This Matters for SAP Scores (And Your Wallet)
There is a direct link between water efficiency and energy performance.
- Regulatory Alignment & SAP Scores: Complying with Part G is mandatory, but pushing for these incentive levels does double duty. The Part G water calculation directly impacts SAP calculations and final EPC scores . Since hot water demand is a major contributor to a home’s energy load, reducing flow rates (e.g. showers to 7 L/min) significantly lowers energy demand. Overlooking this can lead to a “significant hit” on EPC scores .
- Direct Financial Benefits: The incentives can significantly offset construction costs. While schemes vary by provider, the potential savings are substantial.
Snapshot of Incentives (2025-2026 Period):
- Thames Water: Up to £2,100 for greywater recycling/rainwater harvesting, plus £400 for meeting Tier 1 efficiency (<110 l/p/d).
- Anglian Water: Offers £500 for homes achieving <90 l/p/d.
- Severn Trent Water: Offers tiered incentives up to £350 for <85 l/p/d.
- United Utilities: Up to £664 for water neutrality projects.
Want to see the full rates for Northumbrian, Severn Trent, Southern and others? Download our 2025/26 Water Incentive Cheat Sheet (PDF)
(Note: Always check your specific water company’s developer services website for the latest values and eligibility criteria.)
Ensuring Compliance: Don’t Get Caught Out
The framework brought a standardised approach to auditing which is now fully active.
- Timing is Key: Audits are conducted on completed premises (with all fittings installed) but never on occupied premises.
- Burden of Proof: While water companies support the process, the burden of proof lies with the developer/applicant.
- Consequences: Non-compliance can result in cost recovery, the reclaiming of paid incentives, or even prohibition from future incentive applications.
Next Steps for Development Projects
The industry is moving toward “water smart communities,” and the regulatory framework is now firmly in place to support this. By leveraging these water efficiency incentives, projects can achieve cost savings while contributing to national sustainability goals.
Download the Free PDF: 2025-2026 Water Incentive Summary Tables
Are you confident your current specifications meet the Tier 1 targets? Contact our team today for support with Part G calculations, water efficiency strategies, and sustainable compliance planning.
Note on Pricing: These incentive values reflect the 2025-2026 charging period (ending March 31, 2026). Water companies typically update their infrastructure charges and incentive tiers annually on April 1st. Please check the specific water company’s latest developer charges scheme for applications submitted after this date.