How much does septic system installation cost in Davis?

Most Davis projects land between $6,550 – $21,800, with an average near $14,200. Local crews quote roughly $6,550 – $21,800 per system.

What is included in the Davis price per system?

Typically materials, labor and cleanup. Permits, disposal and access challenges are usually quoted separately.

Unit pricing

Septic System Installation cost per system in Davis

Septic System Installation cost per system in Davis, California in 2026.

Low

$6,550

Average

$14,200

High

$21,800

Davis crews quote about $6,550 – $21,800 per system.

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Multiply local unit rates by your real measurements.

What drives septic system installation prices in Davis

Local labor, permitting and climate move Davis prices away from the national average.

Labor market

Licensed Davis contractors carry California workers' comp and prevailing wage pressure, and crews here quote roughly 9% above the national labor average. Demand in the Sacramento market peaks in spring, so booking early usually beats a rush premium.

Permits

Davis follows the California Building Standards Code, so most structural, electrical, plumbing and re-roof work needs a permit from the Davis building department plus Title 24 energy compliance. Sacramento-area jurisdictions add floodplain review in parts of the valley.

Climate

Davis sits in a hot-summer Mediterranean climate with wet winters, so expect heat-rated materials and exterior work scheduled outside the wet winter.

Davis unit pricing by material

Conventional gravity system$8,800 – $12,000

Chamber system$12,000 – $15,900

Pressure-dose / mound system$15,900 – $20,500

Aerobic treatment unit$20,500 – $28,300

Ways to lower your Davis price

Schedule the perc test early — a failed test changes the whole design.
Combine excavation with other sitework already planned.
Collect three written bids on an identical scope — spreads of 20–40% are normal.
Book in the off-season and stay flexible on the start date to save 5–15%.
Bundle nearby work into one mobilization so you only pay setup and travel once.
Ask what the contractor would change to cut 10% without hurting durability.

Davis questions

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