Mold inspection in NYC: the assessment before and after the work

NYC Water Damage Repair is an independent referral service, not a mold assessor or remediation company. When you send the form, your details go to an independent local restoration provider serving New York City, who can contact you, inspect and quote any work directly. You decide whether to hire them.

When an inspection is required, and when it is a choice

New York City’s Health Department says that if the area of mold to be fixed is more than 10 square feet in a building with 10 or more apartments, or in a building with 25,000 or more square feet of non-residential floor area, building owners or managers must use New York State Department of Labor licensed mold assessment and remediation workers. On those jobs, the assessment is not optional: it is how the scope of the work is set.

In a house, a small building, or for a patch under 10 square feet, an inspection is a choice. EPA says that in most cases a moldy area smaller than about 10 square feet can be handled by the occupant. An inspection is still worth it when you cannot find the water, when mold keeps coming back, when there is a smell but nothing visible, or before you buy or sell.

What a mold assessment includes

Assessors work differently, but a thorough inspection usually covers:

• A visual inspection of the rooms, closets, cabinets, around windows, radiators and air conditioner sleeves, and the areas next to bathrooms and kitchens.
• Moisture readings of walls, ceilings and floors, because mold follows water.
• The source: a leak, condensation, a failed seal or water coming in from outside.
• The size of the affected area, in square feet, which decides which rules apply.
• Sampling, if the assessor thinks it is useful, to confirm what is there or to compare with outside air.
• A written plan setting out what is to be removed, how the area is to be contained and what the finished job must achieve.

Why the inspector cannot do the removal

The Health Department explains it in one sentence: to protect against fraud, New York State law prohibits the same licensed worker from carrying out both the assessment and the remediation on a property. HPD says that for residential properties of 10 or more units with more than 10 square feet of mold, the assessor and the remediator must be completely independent of each other. The state’s Mold Program lists the same separation among its minimum work standards, together with an independent assessment to define the scope and posted notice of the project and the licenses.

The inspection after the work

The state’s minimum work standards include completion of a post-remediation assessment. That second visit checks the finished work against the plan: the moldy materials named in the plan are gone, the area is clean and dry, and the cause has been dealt with. Only then should walls be closed and painted. Keep the plan and the post-remediation report: a board, a buyer or a future tenant may ask for them.

After a leak: inspection, drying, then remediation

Most mold in city apartments follows a leak. EPA’s guidance is to dry water-damaged areas and items within 24 to 48 hours to prevent mold growth, so the fastest way to avoid a mold job is to dry a leak properly. Where mold is already growing during water damage work, the IICRC directs restorers to its mold standard, the S520. The full process, and the city’s rules for owners, are on the page about mold remediation in NYC. If the leak itself has not been found, start with leak detection in NYC.

What to have ready for the inspection

• When you first saw or smelled it, and whether it has grown.
• Any leak history: dates, the unit above, the plumber’s note.
• Photos of earlier water damage in the same spot.
• In a building, the managing agent’s contact and whether the building has been told.

Questions people ask