Chicago window contractor licensing and insurance, and how to check it

The license most sites tell you to check does not exist

A homeowner told to "check their Illinois license" tries, finds nothing, and either stops checking or assumes the contractor is hiding something. Both conclusions come from advice that cannot be followed.

We read the Illinois Department of Financial and Professional Regulation's list of regulated professions in full, A to W, on 2026-08-11. There is no entry for general contractor, contractor, construction, remodeler, carpenter or window installer. The only construction trades the state licenses are Roofing Contractor and Qualifying Party Roofing Contractor, alongside the design professions: Architect, Professional Engineer, Structural Engineer, Land Surveyor and Home Inspection. Private Security Contractor and Security Contractor are alarm and guard licenses, unrelated to building work.

So the state's License Look-Up is a real tool that does not answer this question. It verifies a roofer, an architect or a structural engineer, and its page notes it is approved as a primary source for verification and updates daily. A window company will not be in it, because there is nothing to find.

What homeowners are told to check	What actually exists
Illinois general contractor license	Does not exist. Illinois licenses no general contractors statewide
Illinois window installer, remodeler or home improvement registration	Does not exist. No entry of any kind on the IDFPR list
Chicago "window contractor license"	Does not exist as its own credential. Window work sits under the general contractor license
Chicago General Contractor License	Exists. Department of Buildings, Municipal Code Chapter 4-36, classes A to E, valid one year, public lookup
Chicago Home Repair license	Exists, from a different department, and it cannot pull building permits
Illinois Roofing Contractor license	Exists at IDFPR. The only construction trade license the state issues, and not the one for windows
Statewide consumer rules with no license attached	Exist. The Home Repair and Remodeling Act, 815 ILCS 513. Binding, but there is no registry and nothing to look up

IDFPR profession list and License Look-Up, and the Illinois General Assembly's text of 815 ILCS 513, all read 2026-08-11. Chicago rows read at chicago.gov the same day.

The license that does apply: Chicago's General Contractor License

The Department of Buildings describes it in one paragraph, quoted exactly:

"A City of Chicago general contractor license is required to perform most types of building construction, alteration, repair, and demolition work within the City of Chicago. A general contractor must comply with the consumer protection requirements applicable to licensed home repair companies when performing residential work but is not required to obtain a separate home repair license."

Four practical facts come with it. It is issued by the Department of Buildings, not by Business Affairs and Consumer Protection, which is why it does not appear in the city's business license data. Applications and renewals are processed by Continental Testing Services. It is valid for one year. And it is issued to a business, including a sole proprietorship, so you search a company name rather than the name of the person standing in your kitchen.

What triggers the requirement is a regulated activity, and the city's definition is broader than most people expect. It covers work that meets either of these descriptions, quoted from the same page:

• "Requires a sign permit, building permit, or demolition (wrecking) permit from the Department of Buildings"
• "Is exempt from obtaining a building permit under Section 402 of the Chicago Construction Codes Administrative Provisions"

Read that second bullet twice. On its face, permit-exempt work is still a regulated activity. That matters enormously here, because most Chicago window replacements need no building permit at all. It is also where the city's own pages stop agreeing with each other, which is covered further down rather than glossed over.

Where a window job does need a permit, the licensing requirement is explicit. Chicago's instructions for the Exterior Window or Door Replacement permit worktype list the required contractor as "A licensed general contractor (Class A, B, C, D, or E, based on total project cost)". Not a window specialist, not a home repair licensee. A licensed general contractor.

Department of Buildings general contractor page and Express Permit Program window instructions, read at chicago.gov 2026-08-11.

The five classes, and why Class E is not a lesser license for your job

The class is set by the size of project the license permits, and it carries the insurance minimum with it. It is not a skill grade or a seniority ladder.

Class	Maximum project value	Demolition permitted	Minimum insurance	CY2026 license fee
A	Unlimited	Ordinary or complex	$5 million per occurrence	$3,500
B	$20 million	Ordinary or complex	$3 million per occurrence	$1,800
C	$10 million	Ordinary	$2 million per occurrence	$1,300
D	$4 million	Ordinary	$2 million per occurrence	$900
E	$500,000	None	$1 million per occurrence	$300

City of Chicago Department of Buildings, general contractor license page, read 2026-08-11. The city footnotes the Class B, C and D insurance figures as "Effective January 1, 2026. For Class C and D licenses issued prior to this date, the increased insurance requirement will be enforced when the policy on file expires."

The takeaway. A whole-house window replacement sits nowhere near the $500,000 ceiling on a Class E license, and the city's permit instructions accept any class from A to E, so a small company holding Class E is fully licensed for your job rather than a warning sign. What the class does tell you is the insurance floor behind it, $1 million per occurrence at Class E and rising from there. The fee column explains the market: a one-truck installer pays $300 a year, a Class A general contractor pays $3,500, and you are rarely choosing between those two for eight windows in a bungalow.

A Home Repair license is a different license, and it cannot pull permits

This is the second place the advice goes wrong. Chicago does issue a Home Repair license, but it is a Department of Business Affairs and Consumer Protection business license and it is not interchangeable with the general contractor license. The city states the boundary three times on its own page:

• "Home Repair licensees may not pull building permits."
• "A General Contractor license is required instead of a Home Repair license if the work requires a building permit."
• "A home repair license is not required for a business that holds a General Contractor license."

It runs a two-year term, the fee on the live page is $1,000, and the insurance minimum is at least $300,000 per occurrence, against $1 million at the bottom of the general contractor ladder. That difference is what stands behind a mistake on your house.

BACP home repair license page, read at chicago.gov 2026-08-11.

	General Contractor License	Home Repair License
Issued by	Department of Buildings	Business Affairs and Consumer Protection
Can pull a building permit	Yes	No, in the city's own words
Term	One year	Two years
Fee	$300 to $3,500 by class, CY2026	$1,000
Minimum insurance	$1 million to $5 million per occurrence by class	At least $300,000 per occurrence
Where to verify it	Licensed Trade Contractors lookup	Chicago Data Portal business license data

Both columns read at chicago.gov 2026-08-11.

The one question the city does not settle

Here is the honest gap, and it lands on exactly the job this site is about. The Department of Buildings says the general contractor license is triggered by a regulated activity, and defines that to include work "exempt from obtaining a building permit under Section 402". Business Affairs and Consumer Protection says a General Contractor license is required instead of a Home Repair license "if the work requires a building permit". A straightforward in-kind window replacement in a Chicago two-flat requires no building permit. On that job the two official pages point in different directions: one reads as requiring the general contractor license anyway, the other as leaving room for a home repair licensee.

Resolving it takes the ordinance, and we could not read it. Municipal Code Chapter 4-36 is hosted on a third-party code library that returned an HTTP 403 error behind a bot challenge to every method we tried on 2026-08-11. Sections 4-36-010, 4-36-020 and 4-36-090 are therefore unread, and every Chapter 4-36 detail on this page is attributed to the Department of Buildings' own summary of it. The city prints its own warning on that page: where the page differs from the Municipal Code or applicable rules, "the ordinance or rule controls".

What to do with an open question. Hire a licensed general contractor and it never arises: that license covers the work under either reading, and the city itself says the home repair requirement is waived for its holders. If a company you like holds a Home Repair license instead, call the Department of Buildings about your specific scope before you sign.

How to check a license in about two minutes

Chicago publishes a real, working lookup, which puts this city ahead of most. We queried it live on 2026-08-11 and its backing data returned 11,560 active general contractor records. The page footer read "Information shown is current as of Tuesday, August 11, 4:00 PM", so the data is refreshed rather than archived.

• Active licenses: webapps1.chicago.gov/licensedcontractors/general
• Active and inactive: webapps1.chicago.gov/licensedcontractors/generalAll. Use this one second. A company whose license has lapsed appears here and not in the first list, and that difference is the whole point of checking.

Each record carries the same fields, and each field answers a different question:

Field in the record	What it tells you
License type, including class	Reads as "General Contractor (Class E)". Confirms both the credential and the project ceiling
License number	Chicago general contractor numbers begin with TGC, for example TGC119119. A number in another format is not this license
Name, address, phone	What the city has on file. Match it against the name on the quote, not against the name on the truck
License expiration date	Whether the license is current on the day your job starts, not the day you signed
Insurance expiration date	The city tracks this separately, and it is the field most worth reading. A license "is automatically inactivated if the associated insurance policy expires"
License inactive flag	A plain yes or no. On a real record we read it printed "No" alongside an insurance expiration of 02/07/2027 and a license expiration of 02/11/2027

Licensed Trade Contractors lookup and its records, read 2026-08-11. Department of Buildings general contractor page for the automatic inactivation rule, same date.

Three places that will not answer this question

• The Chicago Data Portal business license dataset. A legitimate city source that does carry Home Repair licenses with their number, address and application type. It does not carry General Contractor, because that is a Department of Buildings trade license rather than a business license, and we checked every license description it returns. Run a general contractor check here and you will conclude the company is unlicensed when it is not.
• IDFPR's License Look-Up. Useful only for a roofer, an architect, a structural engineer or a land surveyor. A blank result there means nothing about a window company, because there is no record type to find.
• A badge on a company's own website. A logo is a graphic. The lookup is the record, and it takes the same two minutes.

One more city source: building permit records at webapps1.chicago.gov/buildingpermit/ show permits pulled in the city, so a contractor who says they routinely handle Chicago permits has a public history you can read.

Data Portal dataset r5kz-chrr, IDFPR License Look-Up and the Chicago building permit records, all read 2026-08-11.

Insurance, which is the part that actually protects you

A license number tells you a company met a threshold. The insurance behind it is what pays when a ladder goes through your neighbor's bay window. Chicago ties the two together deliberately.

The city's requirements, quoted:

"Commercial general liability insurance policies must be issued by an insurer authorized to insure in Illinois with a rating of B+ or higher by A.M. Best Company. The policy must cover bodily injury, personal injury, property damage, and completed operations."

Three things in that sentence are worth pulling out. The insurer has to be authorized in Illinois and carry a minimum financial-strength rating, so a policy from an unrated carrier does not satisfy the city. Completed operations coverage is named explicitly, and that is the part that responds to damage discovered after the crew has gone, which is when most window problems surface. And above $1 million, a contractor may combine a primary policy with an excess or umbrella policy to reach the required limit, so a certificate showing two policies is normal rather than evasive.

Statewide, the Home Repair and Remodeling Act sets a separate floor that applies whether or not anyone is licensed. Section 25 requires "public liability and property damage insurance in the amount of $100,000 per person and $300,000 per occurrence of bodily injury and $50,000 per occurrence for property damage, unless the person has a net worth of not less than $1,000,000", plus "$10,000 per occurrence for home repair or remodeling not in conformance with applicable State, county, or municipal codes."

That last clause is unusual and worth knowing about. It is coverage for work that does not conform to code, which is a different failure from breaking something. Note also the net worth escape: a large enough company can satisfy the state requirement by being large, not by being insured.

Department of Buildings general contractor page and 815 ILCS 513/25, both read 2026-08-11.

What to ask for, and what to do with it

• A certificate of insurance sent by the agent or broker, not forwarded by the contractor. A PDF from the company can be a year old or edited. One from the insurer is current by definition.
• Policy dates that cover your install dates. A policy expiring mid-project is a live problem, and in Chicago it also inactivates the license.
• Completed operations named on the certificate. The city requires it, so a certificate that omits it is not describing the policy the city requires.
• A limit that matches the license class. A Class C license presented with a $1 million policy does not match the city's own table. Ask about it out loud.

Bonding, honestly

We found no surety bond requirement, and we are labelling that unconfirmed rather than calling it an answer. The Department of Buildings general contractor page does not state one, the Trade License Information Center does not state one, and the public lookup labels its column "Insurance Expiration Date". But the full insurance requirements live in Municipal Code Section 4-36-090, which we could not read, so we cannot rule out a bond in some circumstance. What we will say plainly: "bonded" printed on a vehicle or a website is marketing until somebody names the bond, the issuer, and what it pays out on. Ask those three questions.

Workers compensation is not covered on this page at all, because we did not read the state requirement at its source in this pass. Rather than repeat what is generally said about it, we are leaving a gap and marking it as one.

The state law that binds without issuing a license

Illinois licenses nobody for this work, but it does regulate the transaction. The Home Repair and Remodeling Act, 815 ILCS 513, applies to residences of six or fewer units, excludes "maintenance, service, or repairs under $500", and does not apply to original construction. Windows are not an interpretation here, they are named in the Section 10 definition: "'Home repair and remodeling' includes the construction, installation, replacement, or improvement of ... storm doors, windows, roofs..."

Section	What it requires
Section 15	Before starting work over $1,000, the contractor "shall furnish to the customer for signature a written contract or work order that states the total cost, including parts and materials listed with reasonable particularity"
Section 20	The customer gets the "Home Repair: Know Your Consumer Rights" pamphlet. Over $1,000 also requires a signed Consumer Rights Acknowledgment Form
Section 22	A buyer age 65 or older gets 15 business days to cancel a contract signed at home after an uninvited solicitation
Section 25	Minimum public liability and property damage insurance, with a net worth alternative
Section 35	Enforced by the Attorney General or a State's Attorney. A violation is a violation of the Consumer Fraud Act

815 ILCS 513, read at the Illinois General Assembly 2026-08-11.

Two consequences follow, and they cut opposite ways. The good one: itemization is a legal entitlement, not a favor. A quote listing parts and materials "with reasonable particularity" is what the statute asks for, which makes comparing two quotes line by line a reasonable thing to insist on. The bad one: no agency issues anything under this Act, so there is no registry, no number and no complaint file. Compliance shows up in the paperwork you are handed and nowhere else.

Lead paint, the requirement a window job is most likely to miss

Older Chicago housing and window replacement are the exact intersection where lead rules bite, and the city layers its own filing on top of the federal program. Chicago's permit terms state it directly:

"Work must comply with lead-safe work practices required by city, state, and federal laws. You may be required to file a separate Lead-based Paint Renovation, Repair, and Painting Form with the Chicago Department of Public Health (CDPH) before beginning work involving lead-based paint."

The city's environmental permitting page names the obligation more precisely: contractors doing such work must comply with requirements in the Chicago Municipal Code, including Sections 11-4-2150 to 11-4-2190, and "must provide certain notifications to CDPH". The resource itself is listed as "Lead-Safe Renovations - Form LRRP".

Two distinctions keep people out of trouble here:

• Abatement is not renovation. The Illinois Department of Public Health licenses "lead paint inspectors, lead risk assessors, lead abatement contractors, lead supervisors, and lead workers" under the Lead Poisoning Prevention Code. That is the abatement track. Routine window replacement in a painted opening is renovation, and IDPH's own resource list points outward to EPA for that program.
• Firm certification is searchable. EPA runs a public firm search at cdxocsppapps.epa.gov/ocspp-oppt-lead/firm-search, which we confirmed reachable on 2026-08-11. If a contractor tells you they are certified, that claim is checkable in the same two minutes as the city license.

What the federal rule actually says, read at EPA. The Renovation, Repair and Painting Program applies to "anyone paid to perform work that disturbs painted surfaces in homes, childcare facilities and preschools built before 1978", and those firms "must be certified in lead-safe work practices". EPA's page does not single out window replacement, so we do not tell you it is covered. What we will tell you: pulling a window out of a painted opening commonly disturbs paint, and a great deal of Chicago housing predates 1978. That makes this a question to put to the contractor rather than an assumption to carry. Ask whether the firm is certified, and check the answer on the EPA firm search.

US EPA, Renovation, Repair and Painting Program, read 2026-08-12. Chicago permit terms, Chicago environmental permitting overview and the IDPH abatement licensure page, all read 2026-08-11. EPA firm search confirmed reachable the same day.

You may not need this check at all, and it may not tell you what you think

This site is paid a referral fee when a homeowner asks to be matched with a window contractor, set out in full on how we make money, so it is worth being direct about where a license check does not apply or does not help.

• The installer in your house may be exempt by name. Chicago exempts subcontractors and employees working under a licensed general contractor, so check the general contractor and stop there rather than asking four installers for license numbers.
• Material suppliers are exempt too. A company supplying only materials is outside the requirement, so if you buy units and hire labor separately, the license question follows the labor.
• An owner-occupant can do their own work. Chicago exempts an owner-occupant working at their primary residence where the building is three or fewer stories with six or fewer dwelling units and no non-residential occupancy, claimable for one property per calendar year, excluding excavation and demolition. Replacing your own windows in your own two-flat is what that exemption is for.
• Other city trade licenses cover their own scopes. Chicago-licensed board-up, drain layer, electrical, elevator, plumbing and mason contractors are exempt within their scope, as are Illinois-licensed architects, professional engineers, structural engineers and land surveyors within theirs.
• A small repair may sit outside the state Act entirely. The Home Repair and Remodeling Act excludes maintenance, service or repairs under $500, so a single sash repair may carry no written contract requirement. Worth knowing before you decide between repairing and replacing.

And the honest limit of the check itself. A Chicago general contractor license proves a business met a project-value threshold and carried an insurance policy on the day the record was updated. It does not prove the company has ever installed a window, that its warranty is worth anything, or that the last customer was happy. There is no city rating and no complaint score in that database. Check the license, because an unlicensed or lapsed contractor is a genuine problem, but do not mistake a green result for a recommendation.

What to ask, in the order that gets useful answers

• What is the exact business name on your City of Chicago general contractor license, and what is the license number? (You are looking for a TGC number and a name you can search.)
• What class is the license? (Any of A to E covers a house. You are confirming the record, not judging the class.)
• Will your agent send the certificate of insurance directly to me, showing completed operations coverage and dates that cover my install?
• Who is pulling the permit if my job needs one, and if it does not need one, which rule are you relying on? (Check it against the city's own exemption list.)
• My house is older. What are you doing about lead-safe work practices, and are you certified for it?
• Will the contract itemize parts and materials, as the Home Repair and Remodeling Act requires above $1,000?

The recommendation. Do the lookup before the sales visit, not after. It is free, it takes two minutes, and walking into a quote already knowing the license class and the insurance expiration date changes the conversation. Then spend your real attention on the quote, because the license is a floor and the scope is where the money is.

What we could not confirm

• Municipal Code Chapter 4-36 itself. The code host returned HTTP 403 behind a bot challenge on 2026-08-11, so Sections 4-36-010, 4-36-020 and 4-36-090 are unread. Every Chapter 4-36 statement here is the Department of Buildings' description of the ordinance, and the city says the ordinance controls where the two differ.
• Whether the license is required for permit-exempt window work. Two official city pages point different ways, described above. Unresolved.
• Whether any surety bond is required. None found, but that rests on the absence of a statement in pages we could read, not on the code section that would settle it.
• The federal lead renovation rule's own text. Not read at source in this pass, so no threshold or scope appears here.
• Whether Illinois runs its own version of that federal program. The state page we read licenses abatement roles and points outward to EPA, which is consistent with Illinois not running it. Consistent is not confirmed, so we publish neither answer.

Where to go next

• Choosing a Chicago window contractor, the hub for everything on this pillar.
• Do I need a permit to replace my windows?, the exemption lists this page keeps referring to, quoted from the city.
• The Express Permit Program, including the licensed general contractor requirement and the uploads the city asks for.
• What is actually in a window quote, which is where the itemization requirement above becomes useful.
• How we source everything on this site, and what we refuse to publish.

Sources

All read 2026-08-11: the IDFPR list of regulated professions, read in full; the IDFPR License Look-Up; the Home Repair and Remodeling Act, 815 ILCS 513; the Department of Buildings general contractor license page; the Express Permit Program window and door replacement instructions; the Chicago home repair license page; the Licensed Trade Contractors lookup; the Chicago Data Portal business license dataset; Chicago building permit records; the Department of Buildings permit terms for existing buildings; the Chicago environmental permitting overview; the IDPH lead abatement and mitigation licensure page; and the EPA lead firm search. No competitor site, contractor blog or search-engine summary informed any statement above.

Straight answers

Questions Chicago homeowners ask

Is there an Illinois contractor license I can look up?

Not for window work. We read the IDFPR list of every profession Illinois regulates, A to W, on 2026-08-11. There is no entry for general contractor, contractor, construction, remodeler, carpenter or window installer. The only construction trades the state licenses are Roofing Contractor and Qualifying Party Roofing Contractor, plus Architect, Professional Engineer, Structural Engineer, Land Surveyor and Home Inspection. So a site telling you to verify a window contractor's Illinois license is pointing you at something that does not exist. The license that does exist for this work is issued by the City of Chicago, not the state.

What license should a Chicago window company actually hold?

A City of Chicago General Contractor License, issued by the Department of Buildings under Municipal Code Chapter 4-36. The city writes that it "is required to perform most types of building construction, alteration, repair, and demolition work within the City of Chicago". Chicago's own permit instructions for the Exterior Window or Door Replacement worktype require "A licensed general contractor (Class A, B, C, D, or E, based on total project cost)". A Chicago Home Repair license is a different license from a different department, and the city states plainly that "Home Repair licensees may not pull building permits". Read at chicago.gov 2026-08-11.

How do I verify a Chicago general contractor license?

Use the city's Licensed Trade Contractors lookup at webapps1.chicago.gov/licensedcontractors/general, which we checked live on 2026-08-11 and which returned 11,560 active general contractor records. Search the business name, not a person's name, because the license is issued to a business. Each record shows the license type with its class, the license number (Chicago general contractor numbers start with TGC), the address and phone on file, the license expiration date, the insurance expiration date, and an inactive flag. A second view at /licensedcontractors/generalAll includes inactive licenses, which is how you catch a license that has lapsed rather than one that never existed.

My window job needs no permit. Does the contractor still need a license?

Chicago does not settle this in writing and we will not pretend otherwise. The Department of Buildings defines the "regulated activity" that triggers the general contractor license as work that requires a permit AND work that "Is exempt from obtaining a building permit under Section 402 of the Chicago Construction Codes Administrative Provisions", which reads as covering exempt work too. The city's business licensing page points the other way, saying a General Contractor license is required instead of a Home Repair license "if the work requires a building permit". For a permit-free in-kind window swap those two official pages disagree. We could not read Municipal Code Chapter 4-36 to resolve it, because the code host returned an error to every request on 2026-08-11. Treat it as open, and ask the Department of Buildings.

How much insurance is a Chicago window contractor required to carry?

It depends on the license class, and the minimum runs from $1 million per occurrence for Class E up to $5 million per occurrence for Class A, read at the Department of Buildings 2026-08-11. The city also requires the policy to be issued by an insurer authorized in Illinois "with a rating of B+ or higher by A.M. Best Company" and to cover "bodily injury, personal injury, property damage, and completed operations". A license "is automatically inactivated if the associated insurance policy expires", which is why the lookup prints an insurance expiration date next to the license expiration date. Separately, the Illinois Home Repair and Remodeling Act sets a statewide floor of $100,000 per person and $300,000 per occurrence of bodily injury and $50,000 per occurrence for property damage, unless the contractor has a net worth of at least $1,000,000.

Does a Chicago contractor have to be bonded?

We found no bond requirement, and we are labelling that as unconfirmed rather than as an answer. Neither the Department of Buildings general contractor page nor the Trade License Information Center states a surety bond, and the public lookup labels its column "Insurance Expiration Date". But Municipal Code Section 4-36-090 carries the full insurance requirements and we could not read the code text on 2026-08-11, so we cannot rule out a bond in some circumstance. What follows practically: do not treat the word "bonded" on a truck or a website as proof of a city requirement being met. Ask what the bond is, who issued it, and what it actually pays out on.

Do lead paint rules apply to replacing windows in an older Chicago house?

Very possibly, and this is the requirement a window job is most likely to miss. Chicago's own permit terms state that "Work must comply with lead-safe work practices required by city, state, and federal laws" and that "You may be required to file a separate Lead-based Paint Renovation, Repair, and Painting Form with the Chicago Department of Public Health (CDPH) before beginning work involving lead-based paint". The city's environmental permitting page cites Municipal Code Sections 11-4-2150 to 11-4-2190 and says contractors "must provide certain notifications to CDPH". Illinois separately licenses lead abatement roles through IDPH, but that is abatement, not routine replacement. The federal program applies to "anyone paid to perform work that disturbs painted surfaces in homes, childcare facilities and preschools built before 1978", and those firms "must be certified in lead-safe work practices" (US EPA, Renovation, Repair and Painting Program, read 2026-08-12). EPA does not specifically name window replacement, so we do not claim it does. Pulling a window from a painted opening commonly disturbs paint, which is why the question belongs to your contractor. Firm certification is searchable at EPA.