Why Two Different Companies Have to Handle One Mold Job in New York

Not on a job over ten square feet. New York licenses mold assessment and mold removal separately and forbids one licensee from doing both on the same property, so a lawful Bronx project runs assessor first, remediator second, and the assessor back at the end to sign it off.

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The rule, in one sentence

Section 936 of the New York Labor Law says no licensee shall perform both mold assessment and mold remediation on the same property, and it shuts the obvious workaround too: nobody may hold an ownership interest in both the assessing company and the removing company on your job. You cannot sign that away, and it is not a paperwork formality. The point of it is the incentive. A company that decides how big your problem is, and then gets paid according to the answer, is grading its own homework. Splitting the two roles takes that away, which is why an assessment report in this state is worth something that a removal estimate written by the crew who wants the removal work is not.

The ten square foot line, and which side of it you are on

Section 930 sets the threshold. A mold project means assessment, remediation or abatement of an area greater than ten square feet, and that is the point where the state licensing regime switches on. Ten square feet is roughly a three foot by three foot patch, so it is worth measuring rather than guessing, because the answer changes who is allowed to touch it and what the job costs. Under the line, nothing in Article 32 applies to you. Routine cleaning and repair that is not being done for the purpose of mold remediation sits outside the definition as well, which is why a plumber replacing a failed riser is not suddenly a mold contractor.

Why nobody will price the removal before the assessment exists

This is the part that surprises Bronx owners most, and it follows straight from the rule. The state Department of Labor's position is that a mold remediation cost estimate should not be given before an independent assessment, because the remediator works from the assessor's plan. Section 945 says what that plan has to contain: the rooms to be worked on, the method for each area, the estimated quantities of material to be cleaned or removed, the clearance criteria, the protective equipment, how occupants get notified, an estimate of cost and time, and where they can be identified, the underlying sources of the moisture. A remediator who has not seen any of that does not know the scope, so a number offered before the plan exists is a guess dressed up as a quote. Expect three line items on a real project, not one: the assessment, the removal priced from it, and the clearance.

Who is allowed to say the job is finished

Not the company that did the work. Section 947 puts that with an independent assessment licensee, who has to verify the work area is free from visible mold and issue a written passed clearance report, and it forbids dismantling the containment before that report is received. In practice that means the assessor you started with comes back at the end, which is also your protection against a crew that packs up early. If anyone offers to check their own work and take the plastic down the same afternoon, the sequence has broken and the clearance you are being handed is not the one the statute describes.

Check the license yourself before you let anyone in

New York publishes the mold contractor license register, and anyone can search it. On 16 September 2026 it showed 36 active mold remediation licenses and 28 active mold assessment licenses at addresses in Bronx ZIP codes, out of 937 and 802 across the state. That is a small enough pool that checking a name takes a minute, and it is the one credential a New Yorker can verify in that time. Section 931 makes it unlawful to work on a project, or even to advertise as a mold assessment or mold remediation contractor, without that license, so a firm that cannot give you a number to look up has told you something useful. Holding both licenses is lawful, by the way. Using both of them on your property is not.

When the honest answer is that you do not need any of this

Often. The EPA's guidance is that if the moldy area is less than about ten square feet, in most cases a homeowner can handle the cleanup themselves, and section 933 exempts a residential property owner working on their own property from licensing altogether, along with an owner or employee working on an apartment building of no more than four dwelling units. A patch behind a bathroom sink on a Saturday morning is not a project and nobody should sell you one. If what you are looking at is bigger than a hand towel, or you have cleaned it twice and it keeps coming back, that is the point where the sequence above starts earning its money. Send us a photograph and the rough measurements and we will tell you which of the two answers you are in, with no obligation either way.