How to Hire a Sewer Contractor in Colorado

Who licenses sewer contractors in Colorado

The Colorado State Plumbing Board, inside the Department of Regulatory Agencies, issues three individual licenses: residential plumber, journeyworker plumber and master plumber. Those are personal credentials. Colorado has no statewide plumbing contractor license and no statewide sewer or excavation contractor license, so the company you hire is licensed by the city or county where the work sits. Denver, Aurora, Colorado Springs and Fort Collins each register plumbing and excavation contractors through their building departments, typically requiring a master plumber as responsible party plus a bond and insurance. Verify the individual through the DORA lookup, labeled Verify a License, and ask the city licensing desk about the company. Colorado does not license general contractors at the state level either, so municipal lining contracts rely on prequalification and bonding. Any firm opening a trench should hand you current liability and workers' compensation certificates unprompted.

Permits and inspections

In Denver, a repair to a sanitary sewer service line goes through the Department of Transportation and Infrastructure, which treats the city as responsible only for public mains and requires a wastewater permit plus a right-of-way permit for any street or alley cut. Colorado Springs splits the job: Colorado Springs Utilities controls the connection while Pikes Peak Regional Building Department issues the plumbing permit and inspects. Aurora Water and Fort Collins Utilities work similarly, each inspecting the open trench before backfill. Colorado 811 requires a locate request two business days before digging, and state law puts that duty on the excavator. A lined pipe should get a post-lining video. The registered contractor pulls the permit, not the owner.

Who owns the pipe under the street

Across the Front Range the owner's responsibility runs all the way to the main. Denver states plainly that it maintains public mains only, so the private tap and service line under the street belong to the property. Lakewood's municipal sewer utility says the same, extending owner responsibility past the property line to the main. Fort Collins and Colorado Springs follow suit, though Colorado Springs Utilities handles damage traced to a verified blockage in its own main. Some suburban special districts maintain the portion in the right-of-way, so if your bill comes from a water and sanitation district, read its rules. Colorado has no point-of-sale lateral law. The utility or its licensed tapper makes the connection.

What is under Colorado, and why it shapes the bid

Colorado soil is the story. Bentonite-rich expansive clay underlies much of Denver, Aurora and Colorado Springs, swelling when wet and shrinking in drought, which heaves and separates old joints and cracks even newer pipe. Pipe eras run clay and cast iron before 1960, a notable run of Orangeburg in post-war Denver neighborhoods, then ABS and PVC. Frost depth along the Front Range is moderate, roughly three feet, so laterals sit deeper than in warm states but shallower than the Upper Midwest. The Western Slope adds shale and gypsum soils; mountain towns add bedrock and short seasons. These conditions favor lining on long runs and push open-cut bids toward shoring and imported backfill.

For the lining methods themselves, the Sewer Pipe Lining Colorado pipe lining guide goes into what fails in the ground here and which method fits.

What a Colorado sewer bid must include

• The Denver, Aurora or Colorado Springs contractor license and the master plumber's DORA license number.
• The wastewater permit and right-of-way permit the city requires, and who applies for each.
• Expansive clay allowances such as bedding, imported backfill and compaction testing, priced separately.
• The tap or reconnection at the main and whether the utility or its tapper performs it.
• A post-lining camera video or an open-trench inspection record delivered before final payment.

The full checklist, for any state, is on what a sewer bid should include.

Red flags in Colorado

• A master plumber number that does not appear in the Colorado DORA license lookup.
• No city contractor license for Denver or Colorado Springs, where the state card alone falls short.
• Backfill with the same expansive clay that broke the pipe, with no bedding specified.
• Digging scheduled before the Colorado 811 locate ticket clears.

A vetted sewer contractor in Colorado

Sewer repair, lining, bursting and replacement in Colorado are performed by Front Range sewer lining crews, covering Denver, Boulder and the Front Range. They are listed in the CIPP Verified Installer directory, which means licensing, completed work and equipment were checked before the listing went live, and every bid starts with a recorded camera inspection.

Estimates are free. Call now. (720) 606-6223

Where Colorado property owners ask for help most

The rules above apply statewide; the communities below are the ones that generate the most questions. Cities with their own hiring page are linked.

Colorado sewer contractor questions

Does Colorado license sewer companies statewide?

Not as companies. Colorado licenses individual plumbers through the State Plumbing Board at DORA, but plumbing and excavation contractors are licensed by each city or county. Check both the person and the company before signing.

Who owns the line under a Denver street?

The property owner. Denver maintains only public mains, so the service line from the house to the tap, including the stretch under pavement, is private. That is the norm across the Colorado Front Range, with a few special districts as exceptions.

What permits does a Colorado lateral need?

Usually two: a wastewater or plumbing permit from the city and a right-of-way permit for any street cut. In Colorado Springs the regional building department and the utility split those roles. The contractor applies, not the owner.

Why do Colorado bids mention bedding?

Because expansive bentonite clay heaves and shrinks with moisture, and laying new pipe straight back into it invites the same failure. Good Colorado bids specify granular bedding, imported backfill and compaction, which costs more up front.

Is Colorado 811 required for short digs?

Yes. Colorado law requires a locate request at least two business days before any excavation, regardless of depth or length, and the excavator is responsible for filing it. Skipping it exposes you to utility damage claims.

The short version for Colorado

In Colorado, get the camera inspection first and keep the video. Verify the master plumber in the DORA lookup and the company at the city licensing desk. Ask who pulls the wastewater and right-of-way permits. Compare bids on bedding, backfill and shoring, since clay is what fails here. Pay the balance after the inspector or post-lining video confirms the work.

Estimates are free. Call now. (720) 606-6223

Sources checked for this page: dpo.colorado.gov/Plumbing · denvergov.org/Government/Agencies-Departments-Offices/Agenci... · www.lakewoodco.gov/City-Hall/Departments/Public-Works/Sanita... · www.csu.org/Pages/WastewaterBackup.aspx