Can I install rainwater tanks and solar panels on my property?

Yes. Rainwater tanks and solar energy systems are widely supported across Australia and are often encouraged for sustainability and efficiency. However, there are specific rules around size, placement, plumbing, and approvals, especially for larger installations or properties in sensitive areas.

Rainwater tanks: What to know

Permitted in most zones: Councils generally allow rainwater tanks for residential use, especially when used for garden irrigation, toilet flushing, or laundry.

Size and location rules: Tanks must be placed within property boundaries, often behind the building line, and may need screening if visible from the street.

Plumbing requirements: If connected to internal fixtures i.e. toilets or washing machines, installation must comply with the Plumbing Code of Australia, including backflow prevention and water quality standards.

Approvals: Small tanks may be exempt from approval, but larger tanks or those in heritage or flood-prone areas may require a Development Application (DA) or council consent.

Solar panels: What to know

Small systems are usually exempt: Most rooftop solar installations (e.g. up to 10 kW) are considered exempt development and don’t require council approval if they meet height, setback, and visual impact rules.

Large arrays or ground-mounted systems: May require planning approval, especially if they exceed size thresholds, are in bushfire-prone zones, or affect neighbouring properties.

Electrical compliance: All systems must be installed by a Clean Energy Council-accredited installer and comply with Australian Standards for safety and grid connection.

Battery storage: Adding batteries may trigger additional fire safety or ventilation requirements, depending on location and system size.

Why install rainwater and solar?

• Reduce water and electricity bills

• Improve sustainability and energy independence

• Meet BASIX or NatHERS targets for new builds

• Increase property value and resilience

Bottom line: You can usually install rainwater tanks and solar panels without formal approval, but it depends on the size, location, and how they’re connected. Always check with your local council and use licensed professionals to ensure compliance.