How to Run an NYC Contractor License Check

Running an NYC contractor license check means searching two different city systems: the Department of Buildings (DOB) for trade licenses and general contractor registrations, and the Department of Consumer and Worker Protection (DCWP) for home improvement contractors. For DOB licensees, use the DOB Licensee Online Search by license number, last name, or business name, and confirm the record shows active status plus current insurance. For residential work, run the same contractor through the DCWP business license search and confirm an active home improvement contractor license. The two lookups take about fifteen minutes together and catch the most common NYC hiring mistake: hiring a contractor who is licensed for one kind of work but not for yours.

This guide walks through both lookups, shows what a clean record looks like, and covers the gaps that trip up even experienced project managers in the five boroughs. It pairs with our guide to verifying contractor licenses, which covers the national playbook, and our contractor onboarding verification checklist for the checks that sit next to licensing.

Last reviewed October 7, 2026. This is an operational framework, not legal advice. Licensing rules change; confirm requirements with the issuing agency before you sign.

Why does NYC have two different license lookups?

New York City splits contractor oversight between two agencies, and the split follows the type of work, not the contractor.

The Department of Buildings licenses the trades and registers general contractors. DOB licensees include master plumbers, master electricians, and other skilled trades, while general contractors complete a registration that requires proof of workers' compensation, disability, and general liability insurance. Under the city construction codes, registered general contractors must also display their license number on trucks, business cards, and advertisements, so "no number on the truck" is a check you can do on the street.

The Department of Consumer and Worker Protection licenses home improvement contractors. A home improvement contractor license is required to do construction, repair, or remodeling work on residential land or buildings in the city, including 1-, 2-, 3-, and 4-family homes and individual apartment units. Renovations that need both a permit and residential scope can require the contractor to hold both credentials at once.

The practical rule: search the DOB portal when the contractor pulls permits or does trade work, and search the DCWP lookup whenever the job is residential. When in doubt, search both.

How do you check a DOB license or general contractor registration?

Open the DOB Licensee Online Search and search by license number, last name, or business name. The DOB confirms three things at once: that the individual or firm is licensed or registered, the current status, and the insurance on file. For insurance questions specifically, the DOB NOW Public Portal has a Licensee view that displays name, business information, and insurance status, as described in the DOB licensing FAQ.

What to confirm on a DOB record:

1. Active status with the right credential. A general contractor registration is not a master plumber license. NYC also issues insurance tracking numbers to non-registered contractors, which only authorize limited work: no new buildings, no demolition, no concrete work over 2,000 cubic yards, and no major alterations. If a contractor shows a tracking number instead of a registration, that limits what they can do on your job.
2. Insurance on file. Full general contractor registration requires workers' compensation, disability, and general liability coverage. Safety registrations for construction work on taller buildings require a general liability policy of at least $1 million. If the portal shows lapsed coverage, the registration cannot support permitted work.
3. Disciplinary history. The DOB publishes disciplinary actions and voluntary license surrenders going back to 1998. Complaints against licensees are handled by the Buildings Special Investigations Unit. A record can be active and still carry a recent action, so read it before you sign.

How do you check a DCWP home improvement contractor license?

Use the DCWP business license search and confirm the contractor holds an active Home Improvement Contractor license under the exact business name that will appear on your contract. The DCWP application checklist lists every document an applicant must submit, which makes it a useful reference for what the license represents.

The DCWP license carries two financial protections worth knowing about, because they tell you something about the business even when the record is active:

• Trust fund enrollment or a $20,000 surety bond. Every DCWP home improvement contractor must either enroll in the Home Improvement Contractor Trust Fund (a $200 enrollment fee) or post a $20,000 surety bond. Consumers who hire a trust-fund participant and win a judgment or arbitration award can recover up to $40,000 through the fund's standard invasion process, per the DCWP trust fund page. Confirming the license means the contractor chose one of those protections, not neither.
• A passed exam. A principal of the business must pass the DCWP home improvement exam within 60 days of the application clearing, covering contractual compliance rules. An active license therefore implies the business passed at least one compliance bar beyond paperwork.

For marketplaces and property managers that onboard NYC vendors at scale, the DCWP check is the one most often skipped: the contractor shows a DOB general contractor registration that looks impressive, while the co-op kitchen remodel actually needed a home improvement license. Verify the license that matches the work, not just any license.

What does a clean NYC record look like?

Whether you are in DOB or DCWP territory, a clean record has the same five parts:

1. Status: active. Expired, suspended, or revoked means the contractor cannot legally perform the work. Renewal dates should be in the future.
2. The right classification for the job. A GC registration does not cover plumbing or electrical work, and a home improvement license does not authorize permitted structural work. Match the credential to the scope.
3. Current insurance and financial protections. Workers' comp, disability, and general liability on the DOB side; trust fund enrollment or the $20,000 bond on the DCWP side.
4. The named entity matches the contract. The business name on the license should be the name on the bid. A license held by one LLC does not cover work billed by another.
5. No recent disciplinary actions. Check the DOB disciplinary directory and DCWP complaint history. One resolved complaint from years ago is context; a recent suspension is a pattern.

Aggregated lookups can speed this up when you are checking a vendor list instead of a single contractor. StateLicense offers a free public license lookup covering NYC along with CA, FL, TX, OR, VA, and WA; each record links back to the issuing board so you can confirm it at the source.

What are the most common gaps in an NYC contractor license check?

• Checking DOB but skipping DCWP, or the reverse. Residential remodels are the classic case: the contractor's DOB registration checks out, but the job also needed a home improvement contractor license.
• Treating a tracking number as a full registration. An insurance tracking number authorizes only limited work. It does not authorize new buildings, demolition, or large alterations.
• Insurance that lapses mid-project. A contractor can be fully credentialed on bid day and uninsured by month three. For multi-month projects, recheck insurance status before each major phase; our workers' comp verification guide explains why exemptions and lapses are the most common failure point.
• The borrowed license number. Match the number on the bid to the name on the board record. A number that belongs to someone else is one of the oldest frauds in the trade.
• Forgetting the co-op and the landmark. License checks cover the contractor's legality, not the building's approvals. Co-op boards and the Landmarks Preservation Commission add their own approval layers, and a licensed contractor still needs them.

Frequently asked questions

Can I check an NYC contractor license for free? Yes. The DOB Licensee Online Search and the DCWP business license search are both free, public, and run by the city. The lookup takes a few minutes per contractor.

Does a general contractor registration cover home improvement work? Not on its own. Residential renovation work on 1- to 4-family homes and individual apartments also requires a DCWP home improvement contractor license. A contractor doing both kinds of work needs both credentials.

What insurance does an NYC general contractor need? Full DOB general contractor registration requires proof of workers' compensation, disability, and general liability insurance. Safety registrations for construction work require at least a $1 million general liability policy.

How do I check complaints against an NYC contractor? The DOB publishes disciplinary actions and voluntary surrenders in a searchable directory. Complaints about DOB licensees go to the Buildings Special Investigations Unit; DCWP handles complaints against home improvement contractors.

The NYC contractor license check, as a checklist

1. Get the contractor's full legal business name and license number before the bid meeting.
2. Search the DOB Licensee Online Search; confirm active status, the right credential type, and current insurance.
3. For residential work, search the DCWP lookup; confirm an active home improvement contractor license under the same business name.
4. Check disciplinary records on both sides.
5. Match the business name on the license to the name on the contract.
6. For multi-month projects, recheck insurance before each phase.