Garden Pond Cost Calculator
Estimate the cost of a garden pond. The size and the materials or finish are the main cost drivers, along with site preparation and access.
Your garden pond details
Your estimate sits within the typical range.
The filtration and pump matter more than the pond itself for keeping water clear, size them to the pond's volume. A koi pond needs much more filtration and depth than an ornamental pond, which is the big cost jump.
💰 Ways to save
- A DIY kit costs far less than a custom build if you are handy, but factor in your own time and tools.
- Level and clear the site yourself where you safely can, you are paying trade rates for any prep otherwise.
- Get a few quotes and ask what the base or slab adds, it is often a separate and underestimated cost.
How we estimate this
A garden pond in Australia typically costs around $400 to $1,200 in 2026 for a small preformed pond with a pump, rising to $3,000 to $10,000 for a large feature or koi pond with excavation, a liner and proper filtration.
Pricing reviewed: November 2026.
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Pricing reviewed November 2026. Indicative Australian costs, not a quote.
Understanding garden pond costs in Australia
A garden pond in Australia typically costs around $400 to $1,200 in 2026 for a small preformed pond with a pump, rising to $3,000 to $10,000 for a large feature or koi pond with excavation, a liner and proper filtration.
A garden pond is priced by size and whether it is preformed or built. The excavation, liner or shell, pump and filtration drive the cost, and good filtration is what keeps the water clear and any fish healthy.
Frequently asked questions
How much does a garden pond cost in Australia?
Roughly $400 to $1,200 in 2026 for a small preformed pond, and $3,000 to $10,000 for a large feature or koi pond with excavation and filtration.
Why does my pond water go green?
Usually under-sized filtration or a pump too small for the volume, letting algae take over. Sizing the filter and pump to the pond, and some shade and planting, keep the water clear.
Are you a outdoor / landscaping builder?
Everyone on this page is working out what garden pond costs because they are ready to hire. Put your business right beneath the calculator, in your state, so you are who they find. From $50/mo.