Iowa's Best Contractors
TradesCountiesBlogRegistry ReportPost a projectSign inClaim your profile

Water/Sewer Line Construction in Iowa

228 contractors statewide are registered with the State of Iowa for this trade.

Also searched as: sewer, water line, septic.

How many water/sewer line construction are registered in Iowa?

As of September 2026, 228 water/sewer line construction hold a construction contractor registration with the State of Iowa, of which 228 are currently in Registered status. They operate out of 185 cities across 72 Iowa counties. This is the complete State registry for the trade — not a paid or curated selection.

Registered
228
in this trade
Iowa-based
65%
79 from out of state
Counties covered
72
of 99 in Iowa
New in 12 months
223
median 0.5 yrs registered

The largest concentrations are Sioux Falls (6), Ankeny (3), Sioux City (3), Council Bluffs (3) and South Sioux City (3). A further 79 are based outside Iowa but hold a current Iowa registration, which Iowa Code ch. 91C requires before they may work in the state.

Rather collect bids?

Describe the job once and let registered water/sewer line construction in Iowa bid for it. Bidders never see your name, email, or number unless you choose to share it.

Get bids from water/sewer line construction in Iowa →

Free, no obligation to hire. No account form — your email is the login.

By city

First 100 of 228

Pick a city above to see the rest.

How to choose the best water/sewer line construction in Iowa

Iowa does not rate or rank contractors, and neither do we — the 228 registered water/sewer line construction listed on this page (current as of September 2026) are the complete State registry for Iowa, shown without any quality ranking. “Best” is not a list you can look up; it is the contractor who is right for your job. Here is the method the pros’ own trade associations recommend for finding them:

  1. 1. Start from the complete list, not an ad. Every business above holds a current State registration — a legitimacy baseline the incumbents’ pay-to-play lists cannot promise. Shortlist three or four whose location and trade fit your project.
  2. 2. Confirm the registration is active. Check each one on the Iowa Department of Inspections, Appeals, and Licensing’s official portal (verify a registration ↗). Every profile here links to the State’s own record so you can check it in one click.
  3. 3. Get current proof of insurance. Ask for a certificate of general liability and workers’ compensation. Never let uninsured work start on your property.
  4. 4. Get at least three written, itemized bids. Compare the same scope apples-to-apples. Be wary of a bid far below the rest — it usually hides missing scope or “surprise” costs later.
  5. 5. Check references and recent local work, then put the full scope, price, milestone payment schedule, and warranty in a written contract before anyone starts.

The full guide: finding the best contractor in Iowa →Questions to ask before you hire →How to verify a registration →

Frequently asked questions

Who are the best registered water/sewer line construction in Iowa?

Iowa does not rate or rank contractors, so there is no official "best registered water/sewer line construction" list — any site claiming one is guessing. Instead, this directory shows the complete field: all 228 registered water/sewer line construction the State lists in Iowa, unranked, so you can compare them yourself. To find the best one for your project, confirm each contractor's registration is active, ask for current proof of liability insurance and workers' compensation (and, for a licensed trade, a current State trade license), and get at least three written itemized bids before you hire.

How many registered water/sewer line construction are there in Iowa?

As of September 2026, the State of Iowa lists 228 registered water/sewer line construction in Iowa. This directory shows all of them — it is the complete public registry, with no paid placement affecting who is listed.

Is a registered contractor the same as a licensed contractor?

No. Iowa requires most construction contractors to register with the State (Iowa Code ch. 91C), but registration is not a license, an endorsement, or a guarantee of quality, insurance, or bonding. It confirms only that the business filed a current registration with the State.

How do I verify a contractor's Iowa registration?

Look up the registration number on the Iowa Department of Inspections, Appeals, and Licensing's official portal (https://laborportal.iwd.iowa.gov/iwd_portal/). Every profile in this directory links to the State's own record so you can confirm it independently — see the step-by-step guide at https://contractiowa.com/verify.

Are these contractors insured or bonded?

Registration does not verify insurance or bonding. Always ask a contractor for current proof of liability insurance and workers' compensation, and get at least three written bids, before you hire.

Where does this data come from and how current is it?

It comes directly from the Iowa Department of Inspections, Appeals, and Licensing's public "Active Iowa Construction Contractor Registrations" record, last exported September 2026. You can download the full list as a CSV, or read how this directory is built.

↓ Download this list (CSV)Data, sources & method →Verify a registration with the State ↗