"Cold Steel" by Terry Johnston // CC BY 2.0

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Greg J Olsem

this is my business

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Best Plumbers in Carroll

Updated: May 16, 2026

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License Not Verified

License #	C144100
Status	Active
State	Iowa
Type	Contractor

When BuildZoom last verified this license, it had an expiration date of June, 2026. Check the current license status of Greg J Olsem with the Iowa Workforce Development Agency

This is a sample of licensing data; click here to access a complete history.

License Not Verified

License #	14329
Status	Active
State	Iowa
Type	Plumbing

When BuildZoom last verified this license, it had an expiration date of June, 2023. Check the current license status of Greg J Olsem with the Iowa Department of Public Health

This is a sample of licensing data; click here to access a complete history.

Inactive License

License #	C131026
Status	Inactive
State	Iowa
Type	Contractor

According to the Iowa Workforce Development Agency, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.

Check this license's status for Greg J Olsem at the Iowa Workforce Development Agency.

This is a sample of licensing data; click here to access a complete history.

Inactive License

License #	52034-CL
Status	Inactive
State	Iowa
Type	Plumbing And Mechanical

According to the Iowa Department of Public Health, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.

Check this license's status for Greg J Olsem at the Iowa Department of Public Health.

This is a sample of licensing data; click here to access a complete history.

Inactive License

License #	C128969
Status	Inactive
State	Iowa
Type	Contractor

According to the Iowa Workforce Development Agency, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.

Check this license's status for Greg J Olsem at the Iowa Workforce Development Agency.

This is a sample of licensing data; click here to access a complete history.

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BuildZoom Score

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*No active license on file. If you are Greg J Olsem, click “This is My Business” to update your information.

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Bond Value

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Before you Hire

Here are some rules, regulations, and laws governing general contractors in Iowa:

Does Greg J Olsem carry a valid contracting license?

Although a contractor license is not required in the state of Iowa, contractors earning more than $2000 per year from construction related work must register their business with the Iowa Division of Labor.

Greg J Olsem currently holds license C144100, 14329, C131026, 52034-CL, C128969 (Contractor, Plumbing, Plumbing And Mechanical), which was Inactive when we last checked.

How important is contractor licensing in Iowa?

In Iowa, general contractors are not required to pass an exam to become licensed. However, plumbing and electrical contractors do have to pass a trade exam to obtain a license in Iowa.

Your liability risk when hiring Greg J Olsem

Registered contractors in Iowa are required to carry an active workers' compensation policy. In addition to workers' compensation insurance, it is always a good idea to hire contractors with general liability insurance. Be sure to request copies of certificates for both workers' compensation and general liabilty insurance

Financial recourse when hiring Greg J Olsem

Depending on the city, Iowa contractors may be required to obtain a surety bond. If applicable, homeowners can file a claim against this bond in the event of faulty work or damaged property.

How is the BuildZoom score calculated?

The BuildZoom score is based on a number of factors including the contractor's license status, insurance status, verified work history, standing with local consumer interest groups, verified reviews from other BuildZoom users and self-reported feedback from the contractor.

Why you should hire through BuildZoom

When it comes to major construction work or even minor alterations to your home, hiring the wrong contractor could result in incomplete or defective work.You may even find yourself dealing with huge liability claims. BuildZoom does the homework for you and helps you hire the right contractor.

You should get several bids before hiring a contractor

Before hiring a contractor in Iowa, be sure to get at least 3 detailed bids. Quality contractors will take the time to explain their budget proposal, and help guide you through the estimate process. Be wary of an abnormally low bid, they are not worth the risk. These underpriced projects often do not end well for the homeowner, choose a contractor you trust and can clearly communicate with. BuildZoom has made the bid collection process extremely simple (and free). Just click here to get started.

The best way to use BuildZoom is to let us recommend contractors for your remodeling projects.

Homeowners who hire through BuildZoom's free bidding system report high rates of satisfaction, and homeowners who research contractors online are twice as likely to be happy at the end of their project.

If you hire a contractor through BuildZoom, that contractor is accountable to us. We can enforce standards of behavior, mediate disputes, and guarantee satisfaction.

Read more about why hiring through BuildZoom is so effective.

BuildZoom’s database now contains every licensed contractor across the U.S. - over 2.5 million of them... Categorized contractor profiles are enriched using government data from state licensing boards, Better Business Bureau ratings, and more… BuildZoom jumped into the fray by announcing that it raised $10.6 million in a round led by Formation 8. ...the Y combinator-backed startup said it will be focused on remodeling projects, where the median budget is around $19,000… A new index compiled by BuildZoom — which identifies contractors for projects — found that renovations are running 2.8 percent above their 2005 level…

Browse remodeling photos

If you are looking for remodeling ideas, you can browse hundreds of beautiful photos of work performed by our general contractors.

Browse building permits

You can use our building permit search to see the contractors who are active in your neighborhood and the projects currently taking place.

Get a cost estimate

Use our remodeling calculator to get a ballpark estimate for your project. If you're ready to hire, use our bidding system to get actual quotes from local contractors.