Five Ways of Designing a Water Efficient Home
Water efficiency has become an increasingly important part of residential design in Australia, particularly as building standards continue to focus on sustainability, long-term running costs, and environmental performance.
In NSW, water efficiency also plays a key role in BASIX compliance for new homes, renovations, and multi-dwelling developments.
The good news is that improving water performance does not necessarily require complex technology. In many cases, practical design decisions made early in the project can significantly reduce household water usage over time.
Quick Answer
What Helps Make a Home More Water Efficient?
Some of the most effective strategies include:
- rainwater harvesting systems
- water efficient showerheads
- dual flush toilets
- efficient taps and plumbing fixtures
- efficient hot water systems
These measures can help reduce mains water consumption, improve BASIX performance, and lower long-term utility costs for homeowners.
1. Rainwater Harvesting
Rainwater tanks remain one of the most effective ways to improve residential water efficiency in Australia.
Collected rainwater can often be reused for:
- toilets
- garden irrigation
- laundries
- outdoor cleaning
In some projects, rainwater systems are also integrated directly into BASIX water targets.
This approach can be particularly valuable in rural or drought-prone areas where reducing reliance on mains water becomes increasingly important.
2. Water Efficient Showerheads
Shower usage represents a major portion of household water consumption.
Installing high-efficiency WELS-rated showerheads can help reduce both water and energy usage without significantly affecting day-to-day comfort.
In BASIX assessments, fixture selections such as showerheads contribute toward overall water efficiency targets.
Higher performing fixtures may also help reduce hot water demand, lowering energy consumption at the same time.
3. Dual Flush Toilets
Dual flush toilet systems have become standard across most modern Australian homes for good reason.
Compared to older toilet systems, efficient dual flush fixtures can substantially reduce daily water usage over the life of the home.
Selecting strong WELS-rated fixtures during the design stage can help improve:
- water performance
- BASIX compliance outcomes
- long-term operational efficiency
While individual savings may appear small day-to-day, the cumulative reduction in household water consumption can be significant over many years.
4. Efficient Taps and Plumbing Fixtures
Water efficiency is not only about major systems.
Small fixture selections throughout a home can collectively make a meaningful difference.
This may include:
- aerated taps
- efficient mixers
- leak-resistant plumbing systems
- pressure management
- efficient pipe layouts
Poorly designed plumbing systems can increase water waste, delay hot water delivery, and contribute to unnecessary water loss over time.
Early planning during the design phase can help avoid these issues before construction begins.
5. Efficient Hot Water Systems
Hot water systems affect both water usage and energy performance.
Modern systems are typically selected based on factors such as:
- household size
- climate
- energy source
- usage patterns
Depending on the project, efficient solutions may include:
- heat pump systems
- high efficiency gas systems
- solar hot water systems
The most appropriate option often depends on the overall building design and performance strategy.
In BASIX assessments, hot water system selection can significantly influence overall compliance outcomes.
Why Water Efficiency Matters in BASIX
Under the NSW BASIX framework, residential developments are required to meet specific sustainability targets relating to:
- water
- thermal comfort
- energy
Water efficiency measures form part of the overall assessment and may influence both design decisions and fixture selections throughout the project.
Addressing these items early can often simplify the approval process and reduce redesign costs later.
Designing for Long-Term Performance
Water efficient homes are not only about meeting compliance requirements.
They are also about creating homes that perform more effectively over time — with lower running costs, reduced resource consumption, and improved environmental resilience.
Many of the most effective strategies are relatively straightforward when considered early in the planning and design process.
Need Help With a BASIX Assessment?
Certified Energy provides BASIX assessments for residential projects across NSW, including new homes, alterations and additions, duplexes, and multi-dwelling developments.
If you are planning a project and want to better understand how water efficiency affects BASIX compliance, early assessment can help clarify the most practical pathway forward.
