How much does septic system installation cost in Lakewood, CO?

Most Lakewood homeowners spend between $6,400 – $21,400 on septic system installation, with an average around $13,900. Local labor prices 7% above the national average, so Lakewood quotes tend to land at the higher end of national ranges.

Why is septic system installation more or less expensive in Lakewood than elsewhere?

West metro crews price close to Denver proper. Hail and heavy snow loads affect roof design.

Do I need a permit for septic system installation in Lakewood, Colorado?

City permits required for roofing and remodels. Always confirm current requirements with the local building department before signing a contract, and make sure the permit is pulled by your licensed contractor.

How many quotes should I get in Lakewood?

Get at least three written quotes from licensed, insured Colorado contractors. Comparing line items — not just the bottom line — is the fastest way to spot an inflated bid in the Denver market.

How much does septic system installation cost in 2026?

Most homeowners pay between $6,000 and $20,000, with a national average near $13,000. Small, simple jobs land at the low end; large or premium-material jobs run well above the high end.

What is the cost per system?

Installed pricing usually runs $6,000.00 to $20,000.00 per system, including labor and materials. Expensive metros can run 15–45% higher than that range.

What drives the price up the most?

Scope and access. Larger quantities lower your per-system price, but difficult access, demolition of existing work, structural repairs found mid-job, premium materials and rush scheduling each add 8–30%.

Permits are typically required when the work changes structure or ties into electrical, plumbing, gas or mechanical systems. Budget $75–$600 in most cities and confirm whether your contractor pulls it — unpermitted work can block a future home sale.

How long does the job take?

Most residential projects of this type finish in one to five working days once materials are on site. Custom orders, inspections and weather are the usual causes of delay.

How many quotes should I get?

Three. Bids on the same scope commonly vary 20–40%, and the middle bid with the strongest warranty and references is usually the best value — the cheapest bid often excludes prep, disposal or permits.

Home/Cost guides/Septic System Installation/Lakewood, CO

Denver · Colorado

Septic System Installation cost in Lakewood, CO

Lakewood homeowners typically pay $6,400 – $21,400 for septic system installation. Local labor and materials price 7% above the national average.

Get my Lakewood estimate Use the Lakewood calculator

Lakewood average

$13,900

Typical low

$6,400

Typical high

$21,400

Per system

$6,400 – $21,400

Sample ZIP

80226

What drives Lakewood pricing

Local labor

West metro crews price close to Denver proper.

Permits & code

City permits required for roofing and remodels.

Climate & conditions

Hail and heavy snow loads affect roof design.

Instant cost calculator

Adjust the inputs to see live pricing

Number of bedrooms served3 systems

Quality / material level

Site access

Removal / prep work

Timing

Estimated project cost

$24,510 – $33,630

Most homeowners pay around $29,070

Compare quality / material level

Cost by material in Lakewood

Installed Lakewood pricing per system.

Option	Installed cost	Pros	Cons
Conventional gravity system	$8,600 – $11,800	—	—
Chamber system	$11,800 – $15,600	—	—
Pressure-dose / mound system	$15,600 – $20,200	—	—
Aerobic treatment unit	$20,200 – $27,800	—	—

Where the money goes in Lakewood

A typical $13,900 Lakewood project, broken down by line item.

Labor0.45% · $63
Materials0.38% · $53
Permits & inspections0.05% · $7
Overhead & profit0.12% · $17

Common add-ons

Extras that show up on Lakewood quotes but rarely in the headline price.

Perc test and design

$535 – $2,700

Tank pumping and abandonment

$430 – $1,300

Extra drain field length

$1,600 – $6,400

Effluent filter and alarm

$160 – $640

Ways to save in Lakewood

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.

Lakewood FAQs

Get a Lakewood price you can budget against

Answer a few questions about your project and we'll model a low, average and premium price for your CO ZIP code — then connect you with vetted local pros.

Get free quotes from certified pros

More Lakewood research

Best septic system installation companies in Lakewood Septic System Installation permits in Colorado Septic System Installation near me All Colorado prices

Septic System Installation cost near Lakewood

Septic System Installation cost in Denver, CO

$6,520 – $21,800

Septic System Installation cost in Aurora, CO

$6,280 – $21,000

Septic System Installation cost in Boulder, CO

$7,058 – $23,600

Septic System Installation cost in Arvada, CO

$6,340 – $21,200

Septic System Installation cost in Westminster, CO

$6,340 – $21,200

Septic System Installation cost in Centennial, CO

$6,460 – $21,600

More Colorado cities

Colorado Springs Fort Collins Greeley Pueblo Thornton Longmont Loveland

Other project costs in Lakewood

Fence Installation in Lakewood

$1,605 – $4,280

Roof Replacement in Lakewood

$9,095 – $36,380

Kitchen Remodel in Lakewood

$19,260 – $101,650

HVAC Replacement in Lakewood

$5,885 – $19,260

Deck Building in Lakewood

$4,708 – $12,840

Window Replacement in Lakewood

$482 – $1,605

See every Lakewood cost guide