Updated: February 2, 2026
The New York City Department of Environmental Protection (DEP) has adopted an amendment to the Citywide Construction Noise Mitigation Rules that will require noise monitoring at qualifying large-scale construction sites. The rule takes effect April 21, 2026.
Who Does This Apply To?
The rule is not a blanket requirement. It applies specifically to new building construction projects that meet all four of the following criteria:
- The project requires an Alternative Noise Mitigation Plan (ANMP) for after-hours construction work.
- The project duration is 30 days or longer — consecutive or non-consecutive days count toward the total.
- The building’s gross floor area is 200,000 square feet or more, as defined in Section 202 of the Building Code.
- The construction site is within 50 feet of a residential receptor.
What Is Required If Your Site Qualifies?
If your project meets all of the above criteria, at least one noise monitoring device must be installed on site, positioned to face the nearest sensitive or residential receptor, whichever is closer. Monitoring must begin at the outset of the project and continue 24 hours a day until construction activities are limited to both minimal noise impact work and interior renovation work, as defined under the applicable rules.
ANMP Application Requirements
The ANMP application must include a map — drawn from the Department of City Planning’s ZoLa Map — identifying all sensitive and residential receptors within a 75-foot radius of the site, along with the proposed location of monitoring devices. The application must also provide the number and locations of devices and the responsible party’s name and contact information.
Two categories are exempt from the rule: projects in which all dwelling units qualify as affordable housing units as defined in Section 26-2201 of the Administrative Code, and emergency construction work as defined under the Administrative Code.
Device Specifications
- Be mounted 8–10 feet off the ground, on a wall or pole.
- If wall-mounted, the outdoor microphone must be positioned at least one foot away from the nearest surface to prevent sound reflection.
- Be equipped with a weatherproof, outdoor-rated microphone that meets or exceeds Class 2 standards per IEC 61672-1
- Record sound levels in A-weighted decibels (dBA)
- Capture Lmax readings over five-minute sampling intervals.
- Transmit data — including location, decibel readings, and timestamps — to DEP via a designated public API at least once per hour.
Windscreens must be inspected monthly and replaced if damaged. DEP may also publish an Approved Devices list on its website to help responsible parties identify compliant equipment.
The Bigger Picture
The rule does not establish new noise limits or penalties on its own. Rather, it creates a real-time data reporting mechanism that equips DEP with accurate, continuous sound level information. That data will be used to determine whether existing noise thresholds under an ANMP are being met — and to inform decisions about whether additional mitigation measures or adjusted working hours are warranted.
For construction teams operating large sites with after-hours approvals, now is the time to review your ANMP requirements, assess whether your project falls within the rule’s scope, and begin evaluating compliant monitoring solutions ahead of the effective date.
If you’re part of our New York City construction industry and would like to keep informed of new developments and how your project could be affected, we invite you to sign up for our mailing list. We’ll also send you our complimentary, comprehensive guide to New York City DOB’s new Chapter 33 Building Code revisions.
Cahill Strategies Construction Solutions Guide to NYC Building Code Chapter 33 Revisions
Cahill Strategies has developed a detailed and documented guide to the most important revisions that New York construction professionals are likely to encounter every day. We were able to do this because Cahill Strategies has been involved instrumentally in the development of these codes.
The 100-page book is meticulously organized and can be used as a handy reference when many common issues arise. In each section, the specific revisions are highlighted, and the new information is presented in a clear and practical manner with further explanation on why the change is so important. All of this, reviewed and vetted by one of New York’s longest serving, former DOB professionals – Cahill Strategies’ Director of Construction Code & Safety, Bobby D’Alessio.
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Robert “Bobby” D’Alessio, is a former New York City Department of Buildings Senior Executive Director of Construction Safety. Mr. D’Alessio’s focus is predominately in the areas of construction code and safety analysis for our clients’ major new building and renovation projects in the New York City and surrounding regions.
As Cahill Strategies’ Director of Construction Code and Safety, Bobby brings an unparalleled level of knowledge and practical experience to our growing construction solutions practice area.
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Bernard “Bernie” Ross is former New York City Department of Buildings Director of Construction Safety Enforcement. With more than 20 years serving the DOB as a Construction Inspector, Supervising Inspector, Director Major Projects, and finally, Director of Construction Safety Enforcement. Read more about Bernie here…
Get to know Kevin Moran
Kevin, the Vice President of Construction Solutions at Cahill Strategies, brings a wealth of experience in the New York construction industry to his role. He has a strong track record of guiding clients through complex building processes, with a range of successful projects under his belt, including commercial and residential developments, infrastructure and transportation projects, and various utility matters.
