Updated September 2026
How Much Does a Septic System Cost in the Cowichan Valley?
A new septic system in the Cowichan Valley typically costs $15,000 to $30,000 for a conventional Type 1 system and $25,000 to $45,000 or more for an advanced Type 2 system. Tank pumping runs $250 to $500 and inspections $300 to $700, all shaped by soil, site, and the Island Health filing.
For a full breakdown of what an install involves, see septic system installation.
| Job | Typical cost |
|---|---|
| New Type 1 system (tank + drain field) | $15,000 – $30,000 |
| Advanced Type 2 system (with treatment) | $25,000 – $45,000+ |
| Type 3 system (sensitive sites) | Custom quote on request |
| Drain field replacement | $10,000 – $25,000+ |
What drives the price
Your soil matters most. On open, well-draining ground we can put in a Type 1 — just a tank and a drain field. On the tight clay and high water tables common across the valley floor you need a Type 2 treatment system, which costs more but takes a smaller field. We also price in how easily our machines can reach the site and how big your house is. The first visit is free. The soil testing, the design and the filing are the paid part, and they're in your quote before you decide anything.
Design, testing, and the Island Health filing
Every new or replacement system carries $2,000 to $3,000 in soil and site evaluation, system design, and the Island Health filing, on top of the tank, treatment, and field. That part isn't optional: without it, the system can't legally be built or used, so we include it in the quote up front.
| Service | Typical cost |
|---|---|
| Tank pumping (every 3–5 yrs) | $250 – $500 |
| Septic inspection | $300 – $700 |
| Soil & site evaluation + design + Island Health filing | $2,000 – $3,000 |
| Minor repairs (baffle, pipe, tank) | $500 – $3,000 |
Figures are typical Cowichan Valley ranges for planning only, not quotes. Soil, water table, access, and the system type required move the final price. Come to us for a site and soil evaluation and we'll give you an exact figure.
The cost of skipping maintenance
A pump-out every 3 to 5 years costs you a few hundred dollars. Replacing a drain field you wrecked by skipping them costs $10,000 to $25,000. Keep to that pumping schedule and you protect the most expensive part of the system.
See what a new install involves on septic system installation, or what routine servicing covers on septic tank pumping. We price, install, and service septic systems across the Cowichan Valley, including Duncan, Cobble Hill, Shawnigan Lake, Mill Bay and Cowichan Bay.
Want a real number for your property? Ask us for a free site assessment.