15 · Costs & Materials
A realistic budget prevents mid-build surprises. Costs vary widely by size, liner choice, and whether you DIY.
Typical cost ranges (DIY, small–medium pond)
| Item | Small (5 m²) | Medium (20 m²) |
|---|---|---|
| EPDM liner + underlay | $150–$300 | $600–$1,200 |
| Pump + plumbing | $100–$200 | $250–$500 |
| Plants | $80–$150 | $300–$700 |
| Stone / coping | $100–$300 | $400–$1,000 |
| Filter / bog media | $50–$150 | $200–$500 |
| Total (DIY) | $500–$1,100 | $1,800–$4,000 |
Where money is well spent
- Quality liner — the one component you cannot easily replace.
- Efficient pump — pays back in electricity for years.
- Plants — the actual filtration; buy enough.
Where to save
- DIY excavation with a rented mini-digger vs. contractor.
- Local stone from a landscape yard vs. premium imported rock.
- Propagate plants from friends once established.
Where to save, where to spend
- Spend on: liner, underlay, pump, filter. These are the bones of the pond.
- Save on: edging (use on-site stone), plants (propagate from friends), lighting (solar LEDs).
- Never save on: UV clarifier (if you have fish), dechlorinator, water test kit.
Cost-saving tips
- Buy liner off eBay or aquatic suppliers, not garden centres (50–70% markup).
- Join local pond-keeping groups for free plant divisions.
- Use reclaimed stone and brick for edging.
- Build in autumn/winter when suppliers clear stock.
- DIY the build — labour is 60–80% of professional costs.