How water efficiency can boost your building certification score (BREEAM, LEED, GRESB and more…)

Sustainability certifications are now a critical part of real estate value.

Whether you are developing, managing, or investing in buildings, ratings like BREEAM, LEED, and GRESB influence everything from planning approvals to tenant demand and access to capital.

But one area is still often underplayed.

Water.

Done properly, water efficiency is one of the simplest and most cost-effective ways to improve certification scores while also reducing operational risk and cost.

This guide shows exactly where water contributes, and how to turn it into a measurable advantage.

Why water efficiency matters more than you think

Most sustainability strategies focus heavily on energy and carbon.

That makes sense, but it also creates a blind spot.

Water efficiency delivers three things at once:

* Direct certification points across multiple schemes

* Lower operating costs through reduced consumption

* Reduced risk from leaks, damage, and insurance claims

In many cases, the same interventions, such as monitoring and leak detection, unlock benefits across all three.

Where water efficiency earns you points

The table below breaks down where water contributes to leading certification schemes, what is required, and how it can be achieved in practice.

Scheme	Credit area	Credits available	What you need to do	How Watergate helps
BREEAM	Wat 01 – Water Consumption	Up to 5 + 1 exemplary	Reduce water use vs baseline (e.g. 40–55%+ improvement)	Identify inefficiencies, reduce usage through monitoring and behaviour change
BREEAM	Wat 02 – Water Monitoring	1 credit	Install meters and sub-metering connected to BMS	Real-time monitoring via app and dashboard, anomaly detection
BREEAM	Wat 03 – Leak Detection & Prevention	Up to 2 credits	Detect major leaks and enable automatic shut-off or flow control	Automatic leak detection and shut-off at source
BREEAM	Wat 04 – Water Efficient Equipment	1–2 credits	Install efficient fixtures and controls	Data insights to validate performance and optimise usage
LEED	Indoor Water Use Reduction (WE)	Up to ~11 points	Reduce potable water use vs baseline	Continuous monitoring and leak prevention drive measurable reductions
LEED	Water Metering	Required / points	Whole-building and sub-metering	Full visibility across assets via dashboard
GRESB	Resource Efficiency (Water)	Scored (no fixed credits)	Demonstrate reduction, monitoring, and strategy	Portfolio-wide data, reporting, and optimisation
GRESB	Risk Management	Scored	Show mitigation of operational risks (e.g. leaks, damage)	Automated leak detection and alerts reduce risk exposure
NABERS (UK)	Operational Water Rating	Star rating (performance-based)	Prove actual reduction in water use over time	Ongoing monitoring and optimisation using real data
WELL	Water Monitoring / Management	Multiple features	Ensure safe, monitored, high-quality water systems	Continuous monitoring and rapid leak detection
WiredScore	Smart Systems & Data Infrastructure	Multiple features	Demonstrate smart, connected building systems	IoT-enabled water data and integration into smart building stack

What this means in practice

1. BREEAM and LEED: clear, winnable credits

Schemes like BREEAM and LEED offer the most direct opportunity.

You can secure multiple credits through:

• Monitoring water use
• Detecting leaks early
• Reducing overall consumption

In BREEAM alone, water can contribute up to 8 credits or more, which is often the difference between “Very Good” and “Excellent”.

2. Monitoring is the foundation

Across almost every scheme, one thing is consistent.

If you cannot measure water, you cannot score well.

Metering, sub-metering, and real-time visibility are often:

• Required for certification
• A prerequisite for additional credits
• Essential for ongoing reporting

3. Leak detection is a high-impact, low-effort win

Leak detection stands out because it delivers across multiple areas:

• Certification points
• Operational savings
• Risk reduction

Automated detection and shut-off systems are specifically recognised in BREEAM and support performance across GRESB and NABERS.

4. Operational ratings are where long-term value sits

Design-stage certifications are important, but increasingly:

• Investors look at GRESB scores
• Operators are measured on NABERS performance

These are based on real-world outcomes, not design intent.

That means ongoing monitoring, data, and optimisation are essential to maintain performance over time.

From certification to commercial advantage

The real value of water efficiency is not just in points.

It shows up in:

• Higher asset values
• Stronger ESG performance
• Higher asset values
• Stronger ESG performance
• Lower insurance risk and claims
• Improved tenant satisfaction

And importantly, it is one of the few areas where a single system can influence all of the above.

A simple way to think about it

Water efficiency works across three layers:

Design → Secure certification points (BREEAM, LEED, HQM)

Operation → Improve real-world performance (NABERS)

Reporting → Strengthen ESG scores (GRESB)

Get it right, and you are improving performance across the entire lifecycle of the building.

Time to take a look at water?

Water is often overlooked in sustainability strategies.

That is a mistake.

It is one of the most practical ways to improve certification scores, reduce risk, and deliver measurable savings.

The opportunity is not just to tick a box.

It is to turn water into a competitive advantage.