Annual Boiler Inspections for Small NYC Condos and Co-ops

If your building is heated by a shared boiler, there's one number that decides whether you owe the city an annual inspection: how many families live in the building.

• 5 or fewer families: low-pressure boilers are exempt from the annual DOB inspection.
• 6 or more families: the boiler must be inspected and filed with DOB every year.

That cutoff lands right in the middle of the small-building world, so a 5-unit and a 6-unit co-op on the same block can have very different obligations. Here's how to tell which side you're on and what to do.

Does my building need an annual boiler inspection?

Work through these questions:

1. Is there a boiler that serves the building? For example, a shared heating boiler in the cellar. A boiler inside one apartment that serves only that apartment is excluded.
2. Is it low-pressure or high-pressure? Almost all small residential buildings have low-pressure heating boilers. High-pressure boilers are rare in small buildings and have stricter rules, with two inspections a year.
3. How many families? Low-pressure boilers in residential buildings with 5 families or fewer don't need the annual inspection. At 6 or more, they do.
4. Is the building mixed-use? Buildings with commercial space can be covered even with fewer apartments.

The exemption also covers H-stamped domestic hot water heaters in residential buildings with 5 families or fewer.

The inspection cycle and deadlines

The filing isn't complete until any defects are corrected and the subsequent report is filed. An inspection done on December 20 still has its own 45-day filing clock, so don't assume December 31 is your only deadline.

Penalties

Per DOB:

• Late subsequent report: $50 per boiler, per month once it's more than 180 days from the initial inspection.
• More than 12 months late: the report is considered expired, with a $1,000 penalty per boiler.

For a single-boiler building that's up to $1,000 a year in avoidable penalties, and it shows up as a DOB violation that buyers and lenders will see.

Who does the inspection

Low-pressure boiler inspections are done by a DOB-authorized inspector, such as a qualified boiler inspector or one from an authorized insurance company. Your heating contractor may do it or arrange it. Ask them directly: "Will you file the report in DOB NOW, and will you send us the confirmation?"

The gray area in small buildings

The most common way small buildings miss this isn't ignorance. It's assumptions:

• "Our oil company services the boiler every year, so that must be the inspection." Not necessarily. Annual service is not the DOB inspection and filing.
• "The insurance company inspects it." Sometimes, but did anyone file?
• "We're small, so we're exempt." Only at 5 families or fewer.

A simple annual checklist

1. Confirm applicability once: boiler type, number of families, mixed-use or not. Write the answer in your building records.
2. Schedule the inspection in the first half of the year, ideally paired with your pre-heat-season service.
3. Confirm who files in DOB NOW and get the confirmation.
4. If defects are found, approve repairs promptly and track the subsequent report (180-day clock).
5. Keep copies of reports and filings.

Even if you're exempt

Exempt from the annual DOB inspection doesn't mean exempt from maintenance. Heat season starts October 1, and a boiler failure in a small building means an immediately hazardous (Class C) HPD violation if residents complain. Service it every year before the season. See Heat and Hot Water Rules.

Sources

• NYC DOB — Low-Pressure Boiler Requirements
• NYC DOB — Boiler Compliance
• DOB NOW: Safety