Whether you’re renovating, replacing an old concrete tank, dealing with asbestos cement, or simply reclaiming the space, having a rainwater tank removed is a job that needs to be done properly. This guide walks through the full process: what removal involves, what it costs, what you need to check with your council, and what happens to the tank once it’s gone.
When Do You Need to Remove a Rainwater Tank?
There are several common reasons property owners in NSW arrange tank removal:
- The tank has failed beyond repair: Severe cracking, complete structural failure or advanced corrosion on steel tanks can make repair uneconomical.
- Asbestos cement tanks: Older properties sometimes have tanks made from asbestos cement (also called fibro). These must be removed by a licensed asbestos removalist and handled as hazardous waste.
- Property renovation or development: The tank’s location interferes with building work, a pool, an extension or a DA-approved development.
- Tank replacement: Upgrading from an old smaller tank to a larger or more modern system requires the old tank to come out first.
- Disconnection from water use: If the property is connecting to town water or the tank is no longer needed, some owners choose to remove it rather than leave it as a safety hazard or maintenance liability.
How Much Does Rainwater Tank Removal Cost in NSW?
Removal costs vary significantly depending on tank size, material and site access. Here are the typical ranges:
| Tank Type | Typical Removal Cost |
|---|---|
| Small poly tank (under 5,000L) | $300 – $500 |
| Large poly tank (5,000L – 25,000L) | $400 – $700 |
| Concrete tank (above ground) | $800 – $1,500+ |
| Underground tank (any material) | $1,000 – $3,000+ |
| Asbestos cement tank | Quote required (hazardous waste rates apply) |
Difficult access, steep terrain or the need for excavation equipment all push costs higher. Get a site assessment before committing to a price.
Does Council Approval Matter for Tank Removal?
In most cases, removing a rainwater tank in NSW does not require development approval. However, there are situations where you should check with your local council before proceeding:
- If your tank was included as a condition of development consent (particularly common for properties built after BASIX requirements came into effect in 2004), removing it without replacing it with an equivalent may breach your DA conditions.
- Asbestos removal requires notification to SafeWork NSW if the material is more than 10 square metres in area. Always confirm the rules for your specific tank size and condition.
- Underground tank removal may require a plumbing permit depending on what services need to be capped or disconnected.
If your property was built after 2004 and has a BASIX certificate, check the certificate to see if the rainwater tank is listed as a required feature before you remove it.
The Rainwater Tank Removal Process
Here’s what a professional tank removal typically involves:
Step 1: Drain and Disconnect
The tank is pumped out or drained to remove all water. All pipe connections, including the downpipe inlet, pump connections, overflow and outlet lines, are disconnected and capped or removed as required.
Step 2: Tank Removal
Poly tanks are usually removed in one piece by lifting equipment or manual carry, depending on size and access. Concrete tanks are cut into sections using an angle grinder or diamond-tipped saw and removed piece by piece. Underground tanks require excavation before any cutting or removal can begin.
Step 3: Site Reinstatement
Once the tank is out, the area is cleaned up. For underground tanks, the excavated area is backfilled and compacted. Pipe penetrations in walls are sealed. The site is left clean and safe.
Step 4: Disposal
Poly tanks are often recycled through specialist plastics recyclers. Concrete is crushed and used as fill or disposed of at a licensed construction waste facility. Asbestos is double-bagged, labelled and transported to a licensed hazardous waste disposal facility by the removalist.
Should You Replace the Tank?
If you’re removing the tank because it has failed rather than because you no longer need it, replacement is worth considering at the same time. A new poly rainwater tank can be installed in a day and gives you decades of service with minimal maintenance.
Transform Water can handle removal and replacement in the same visit in many cases, minimising disruption and keeping the project on one invoice. Read about our large-scale rainwater tank system replacement project at Cottage Point for an example of what a full replacement looks like, or our old tank replacement at Castle Hill for a residential example.
Book a Rainwater Tank Removal in NSW
Transform Water carries out rainwater tank removal across Sydney and regional NSW. We provide upfront pricing after a site assessment and handle everything from disconnection through to disposal and site reinstatement.
Contact us to arrange a quote for tank removal, or to discuss replacement options at the same time.
Frequently Asked Questions
Do I need council approval to remove a rainwater tank in NSW?
In most cases no, but if your property has a BASIX certificate that lists the rainwater tank as a required feature, you may need to replace it with an equivalent before removing it. Always check your DA conditions and BASIX certificate before proceeding. Asbestos tank removal has its own notification requirements under SafeWork NSW.
How long does rainwater tank removal take?
A small to medium poly tank can usually be removed in a half-day. Large concrete tanks or underground tanks typically take a full day or more depending on size and access. Your contractor should be able to give you a time estimate after a site inspection.
How do I know if my old tank is made from asbestos cement?
Asbestos cement (fibro) tanks were commonly installed in Australia prior to the 1980s. They typically have a dull grey appearance, feel rough to touch, and may show signs of delamination or fibre exposure. If you are unsure, have the material tested by a licensed asbestos assessor before any removal work begins.
Can an old rainwater tank be recycled?
Poly (plastic) tanks can often be recycled through specialist plastics recyclers. Concrete is typically crushed and reused as fill or construction aggregate. Asbestos cement tanks must be disposed of as hazardous waste at a licensed facility and cannot be recycled.
Can I remove a rainwater tank myself?
Small above-ground poly tanks can be drained and removed by a capable DIYer with the right equipment. However, concrete tanks, underground tanks and any tank that may contain asbestos should always be removed by a licensed professional. Underground removal also requires plumbing disconnection and potentially a plumbing permit.
