Iowa Contractor Registration Lookup & List - DIAL

Iowa Contractor Registration List and DIAL Lookup (businesses only)

Every registered Iowa construction contractor business, from the official Iowa Data Hub dataset published by the Iowa Department of Inspections, Appeals, and Licensing (DIAL). About 17,700 active contractor businesses (from 18,355 active registrations, after person-named sole proprietors are dropped): residential builders and remodelers, commercial and industrial contractors, electrical, plumbing and HVAC, roofing, heavy and civil work, and other specialty trades. Each row has the business name, registration number, primary activity, current issue and expiration dates, city, county, state and ZIP.

Sample output (real rows, a few of the columns):

businessName	licenseNumber	trade	originalLicenseDate	expirationDate	city	county
CREAR CONTRACTING LLC	E128360	Siding Contractors	2022-10-20	2026-11-17	Mediapolis	Des Moines
HANDYMAN HOME SOLUTIONS LLC	C144130	Finish Carpentry Contractors	2025-04-09	2026-11-10	Cedar Rapids	Linn
12 STAR SERVICE LLC	C150810	Plumbing/Heating & A/C Contractors	2025-09-19	2029-06-30	Tiffin	Johnson
MONARCH RENOVATIONS LLC	C086103	Residential Remodelers	2025-09-29	2026-11-10	Des Moines	Polk

Quick start: 3 ready-made searches

Press Try for free, open the JSON view of the input form, paste one of these and press Start. Results appear in the Output tab in seconds and export to Excel or CSV.

Registrations whose current issue date is in the last 30 days (includes annual renewals; about 1,200 business rows, so at most $3.75)

{"issuedWithinDays": 30, "maxResults": 2000}

Every active electrical contractor in the Des Moines area (Polk and Dallas counties, at most $6.00)

{"categories": ["electrical"], "counties": ["Polk", "Dallas"], "maxResults": 2000}

Verify a list of Iowa contractor registrations

{"licenseNumbers": ["C144130", "E128360", "C150810"]}

Free to try: Apify's free plan ($5/month in credit, no card needed) covers about 1,600 records a month. Price: $3.00 per 1,000 results.

No browser, no proxies, no login, no API key. The Actor downloads DIAL's official open dataset (CC BY 4.0) from the Iowa Data Hub, so a full run takes a few seconds.

Three ways to use it

1. Iowa contractor registration lookup / verification. Paste registration numbers into licenseNumbers to check trade, current issue date, expiration, city and county for a whole vendor list in one run.
2. Full Iowa contractor list. Filter by category, city, county, ZIP or business name. Use iowaOnly to drop out-of-state firms registered to work in Iowa.
3. Renewal and recent-issue lists. Use expiresFrom / expiresTo for renewals. issuedWithinDays filters on the current registration issue date, which includes annual renewals — the official file does not include the original first-registration date.

Categories

categories value	Official primary activities included	About (Nov 2026)
residential	Residential remodelers, new single-family and multifamily housing, for-sale builders	~4,200
commercial	Commercial, institutional and industrial building construction	~1,300
electrical	Electrical and wiring installation	~1,700
plumbing_hvac	Plumbing, heating and A/C contractors	~1,500
roofing	Roofing contractors	~870
heavy	Highway, water/sewer, pipeline, power/communication, site preparation, heavy/civil, land subdivision	~1,500
specialty	All other specialty trades (siding, carpentry, flooring, masonry, painting and more)	~6,700

What you get

Field	Example
businessName	HANDYMAN HOME SOLUTIONS LLC
licenseNumber, licenseType	C144130, Iowa construction contractor registration
category, trade	specialty, Finish Carpentry Contractors
licenseStatus, isActive	Registered, true
originalLicenseDate, expirationDate	2025-04-09 (current issue date), 2026-11-10
businessAddress	street address of record, for registered entities only
city, state, zipCode, county	Cedar Rapids, IA, 52404, Linn
verifyUrl, sourceUrl, sourceAgency, retrievedAt	DIAL contractor page, Iowa Data Hub catalog, agency, timestamp

The official file does not include phone or email.

Input

Field	What it does	Default
issuedWithinDays	Current issue date in the last N days (0 = any; includes renewals)	0
issuedFrom / issuedTo	Exact current-issue date window	none
categories	residential, commercial, electrical, plumbing_hvac, roofing, heavy, specialty	all
licenseNumbers	Bulk lookup: only these registration numbers	none
cities / counties / zipCodes	Location filters	all
keywords	Business name or trade contains	none
iowaOnly	Skip out-of-state contractors registered in Iowa	false
expiresFrom / expiresTo	Expiration-date window (renewal prospecting)	none
includeContactDetails	Business street address	true
maxResults	Cap (you pay per result)	100

Who uses this

• Lumber yards, building-supply, electrical, plumbing and HVAC distributors prospecting Iowa contractor businesses.
• Insurance, surety and bonding agents, including renewal prospecting by expiration date.
• General contractors, property managers and home-service marketplaces verifying subcontractors in bulk.
• Construction software, estimating and payments companies selling to Iowa contractors.

Privacy by design

• Businesses only. Person-named sole proprietors are dropped. Trade names without a legal-entity designator are kept, but the street address is blanked. First and last names in the official file are never output. RUN_SUMMARY.droppedPersonName shows the count.
• No email addresses or phone numbers. They are not in the official dataset, and this Actor never outputs them.

Common questions

Is this data legal to use? Yes. It comes from the official Iowa Data Hub dataset "Active Iowa Construction Contractor Registrations," published by DIAL under a CC BY 4.0 license. Attribute the Iowa Department of Inspections, Appeals, and Licensing and the Iowa Data Hub.

How fresh is it? The state updates the dataset weekly. Each run downloads the current file. RUN_SUMMARY.dataset includes the hub's last-updated timestamp when the metadata API is available.

How do I check an Iowa contractor registration? Paste the number into licenseNumbers, or part of the business name into keywords. Always confirm on the official DIAL contractor registration page (verifyUrl) before you hire.

Does Iowa require a contractor registration? Anyone earning $2,000 or more a year from construction work in Iowa must register and renew annually with DIAL. This Actor covers those active registrations, businesses only.

What does the issue date mean? In this official file it is the current registration issue date, which is renewed annually. It is not a first-ever registration date. Use expiration dates for renewal prospecting, and do not treat issuedWithinDays as a list of brand-new companies only.

How much does it cost? Free to try with Apify's free plan ($5/month credit, no credit card), which covers about 1,600 records a month. After that it is $3.00 per 1,000 results, plus a fraction of a cent per run.

Can I get this automatically every week? Yes. Save your filters as a task and add a weekly Schedule. Send each batch to Google Sheets, Slack, email, Zapier, Make or n8n under Integrations.

Can I call it from code or an AI agent? Yes. Use the Apify API or the Python/JavaScript clients, or connect it to Claude, ChatGPT or Cursor through the Apify MCP server.

Data: Iowa Department of Inspections, Appeals, and Licensing, Active Iowa Construction Contractor Registrations, Iowa Data Hub, CC BY 4.0. Not affiliated with or endorsed by DIAL or the State of Iowa.

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