Tacoma, WA · Updated 2026

How Much Does Septic System Installation Cost in Tacoma, WA?

Average septic system installation costs in Tacoma range from $15,054 to $20,367. Get a free, customized estimate below.

15% above national averageFree · No Signup Required

Septic System Installation Cost Breakdown — Tacoma, WA

ItemUnitQtyUnit PriceTotal
Septic Tank (1500 gal)each1$3680.00$3680.00
Drain Field & Gravellinear ft200$40.25$8050.00
Excavation & Backfilllump sum1$2070.00$2070.00
Labor & Permitshr40$97.75$3910.00
Estimated Total$17,710.00

* Prices are estimates based on Tacoma market rates. Actual costs may vary based on project specifics.

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Material line 1

Line total$3,680

Material line 2

Line total$8,050

Material line 3

Line total$2,070

Material line 4

Line total$3,910

Frequently Asked Questions — Septic System Installation in Tacoma

How much does septic system installation cost in Tacoma, WA?

The average cost for septic system installation in Tacoma, WA ranges from $15,054 to $20,367, depending on project scope, materials, and labor rates. Tacoma costs are above the national average due to higher labor and material costs in the region.

How do I get a free septic system installation estimate in Tacoma?

Use Brixor's free online estimate generator above. Enter your project details, customize line items for your specific needs, and download a professional PDF estimate instantly.

What factors affect septic system installation costs in Tacoma?

Key factors include project size and complexity, material quality, labor rates in Tacoma (WA), permit requirements, accessibility of the work area, and seasonal demand. Getting multiple estimates is recommended.