New York Flood Zone and Flood History Disclosure Requirements — Landlord Compliance Guide (2026)

What Flood Zone and Flood History Disclosure Means Under New York Law

On September 1, 2020, New York enacted Real Property Law §231-b, one of the nation’s strictest landlord disclosure laws for flood risk. Unlike many states that treat flood disclosure as optional or advisory, New York treats it as a mandatory, pre-lease condition with real teeth.

The statute requires landlords to disclose, in writing, before a lease is signed:

• Whether the property is located in a flood hazard area (as defined by FEMA flood insurance rate maps or local flood hazard data)
• The property’s flood history, including any documented flooding or water damage events
• Information about flood insurance requirements and availability

This is not a passive disclosure—you cannot rely on a tenant’s assumption or inspection. You must affirmatively provide written notice and obtain tenant acknowledgment. The statute uses mandatory language: “A landlord shall provide a prospective tenant with written notice prior to the execution of a lease.”

This creates a hard compliance deadline: before lease execution. Not at move-in. Not embedded in a lease addendum signed on day one. Before the tenant and landlord both sign the lease.

Understanding the Legal Framework: RPL §231-b (2024 Amendment)

The original 2020 statute was refined in 2024 to clarify landlord obligations and expand the definition of “flood history.” Here’s what changed and what you need to know now:

Flood Hazard Area Definition

A property is in a flood hazard area if it is:

• Located in a FEMA Special Flood Hazard Area (SFHA), including A, AE, or V zones
• Identified in a local flood study or preliminary flood insurance rate map (FIRM) as being in a flood risk zone
• Within a 500-year flood plain as designated by the city or county
• Subject to local flooding due to stormwater overflow or inadequate drainage (municipalities may have more restrictive definitions than FEMA)

New York municipalities—especially New York City, Buffalo, Rochester, and coastal communities—have adopted flood maps that often exceed FEMA designations. For example, New York City’s Flood Hazard Mapper includes areas outside FEMA zones but subject to tidal backup and stormwater flooding. You must check both FEMA and local maps.

Flood History: Expanded Definition (2024)

The 2024 amendment clarified that “flood history” includes:

• Actual flooding events: Water entering the structure from external sources (storm surge, rain, runoff, river overflow)
• Water intrusion incidents: Seepage, basement moisture, or water entry that caused damage to materials or contents
• Documented insurance claims: Any claim filed under homeowner’s, commercial, or flood insurance within the past 30 years (or the owner’s tenure, whichever is shorter)
• Environmental assessments or inspections: Professional reports identifying flood risk, water table issues, or basement moisture problems
• Municipal records: City or county emergency declarations, building damage assessments, or remediation orders tied to flooding

Critically, you are not limited to events that occurred during your ownership. If you purchase a building with a known flood history, you inherit the disclosure obligation. You must disclose prior flooding even if it happened 15 years ago under a previous owner.

Your Step-by-Step Compliance Checklist

Step 1: Determine Flood Zone Status (Before Acquiring or Leasing)

Timeline: Complete this before you list the property or accept an application.

Action items:

• Check FEMA’s Flood Map Service Center: www.msc.fema.gov. Enter the property address and verify the flood zone designation (Zone A, AE, V, or non-special flood hazard area).
• Check your municipality’s flood maps. For NYC, use the Flood Hazard Mapper at https://flood.cityofnewyork.us. Other municipalities post maps on city/county websites or planning departments.
• Contact the local building or planning department to ask if the property is in a designated flood zone or subject to local flood-related restrictions.
• Review the property’s flood insurance policy, if one exists. The presence of a policy is evidence the property is in a flood zone.
• Document your findings in writing. Take screenshots, save PDFs, and store them in your tenant file. This is your proof of due diligence.

Step 2: Research Flood History (30-Year Look-Back)

Timeline: Start this research at least 2 weeks before marketing the property.

Action items:

• Interview the prior owner (if you’re new to the property). Ask directly: “Has this property ever flooded? Been damaged by water? Filed a flood insurance claim?” Document their response in an email or written summary.
• Check insurance records. If you have access to the property’s prior homeowner or commercial insurance, review claims history. Look for “water damage,” “flooding,” “basement moisture,” or “sewage backup” claims.
• Search municipal records. Contact the city or county assessor, emergency management office, or building department. Ask for:
  • Records of the property being damaged or declared uninhabitable due to flooding
  • Any emergency repairs or demolition permits related to water damage
  • Storm damage assessments from recent hurricanes, nor’easters, or major rainfall events (2012 onward)
• Check tax assessment records for flood-related reductions or appeals. Some properties have lower assessed values due to flood risk; this is discoverable in county records.
• Search newspaper archives and local online news. Google the property address with keywords like “flood,” “water damage,” “evacuation,” and the year range. Screen capture any relevant articles.
• Review environmental reports or Phase I ESAs (Environmental Site Assessments). If you commissioned one, it often flags water intrusion or flood risk concerns.
• Document everything in a “Flood History Summary” file. Include dates, sources, and conclusions. File with the lease.

Step 3: Draft and Deliver the Written Disclosure Notice

Timeline: Prepare the notice at least 5 business days before you expect the prospective tenant to sign the lease.

Required elements (per RPL §231-b):

• Clear statement of whether the property is in a flood hazard area (YES or NO)
• If yes: the flood zone designation (e.g., “FEMA Special Flood Hazard Area, Zone AE”)
• Summary of the property’s documented flood history (e.g., “Water intrusion in basement reported in 2019” or “No documented flooding events found”)
• Information about flood insurance requirements (if in a flood zone, insurance is required by mortgage lenders and NFIP rules)
• How to obtain more information (e.g., link to FEMA maps, local flood maps, or contact for the insurance agent)
• Date of disclosure and landlord’s signature

Format and delivery:

• Use a written document (email, PDF, or hard copy letter). Text messages and verbal statements do NOT satisfy the law.
• Deliver via methods that create proof of receipt: certified mail, email with read receipt, or hand-delivery with a signed acknowledgment.
• Do not embed the disclosure in a “take it or leave it” lease document. Provide it separately, at least 5 days before lease signing, to allow the tenant time to review and ask questions.

Step 4: Obtain Tenant Acknowledgment

Timeline: Collect acknowledgment before the lease is signed.

Required form:

The tenant must provide written acknowledgment that they received and understood the disclosure. This is not the lease signature; it’s a separate document. At minimum, require:

• Tenant name and signature
• Date of acknowledgment
• Statement: “I acknowledge receipt of the flood zone and flood history disclosure for [property address] dated [date].”

Pro tip: Have the tenant initial each section of the disclosure (flood zone status, flood history, insurance info) to show line-by-line acknowledgment. This strengthens your proof of compliance if challenged.

Step 5: Document Retention

Timeline: File documents immediately after lease execution and retain for at least 3 years (the statute of limitations for tenant claims).

What to keep:

• Original disclosure notice (signed and dated)
• Tenant’s written acknowledgment
• Screenshots or PDFs of FEMA and local flood maps (dated)
• Flood history research file (including insurance queries, municipal records, prior owner interviews)
• Copy of the signed lease with execution date
• Email chain showing delivery and receipt of disclosure

Storage: Keep both physical copies (fire-proof safe) and digital copies (cloud backup). The Department of Housing and Community Renewal (DHCR) can request these documents during complaint investigations or routine audits.

The Penalties for Non-Compliance: What You’re Risking

Failure to comply with RPL §231-b exposes you to multiple layers of liability:

Civil Penalties

These penalties can be assessed per lease, per tenant, or per year of tenancy, depending on the enforcement agency’s interpretation. A landlord with 10 units who failed to disclose to all tenants could face $50,000+ in penalties from DHCR alone.

Tenant-Initiated Claims

Tenants can sue for damages under General Obligations Law §5203 (breach of warranty of habitability or breach of statutory duty). Courts have awarded:

• Rescission of the lease: Tenant can terminate without penalty and recover all rent paid, plus interest
• Damages: Compensation for physical injury, property damage, relocation costs, and emotional distress if flooding occurs
• Attorney fees and costs: Prevailing tenants recover 100% of legal fees from the landlord
• Punitive damages: In cases of willful non-disclosure, courts may award treble damages (3x the actual loss)

A single tenant lawsuit for failure to disclose, combined with water damage from a storm event, can exceed $100,000 in liability.

Additional Consequences

• Habitability claims: Non-disclosure may support tenant arguments that the property is uninhabitable (especially if flooding subsequently occurs), triggering rent withholding rights and repair-and-deduct remedies.
• Insurance non-coverage: If you fail to disclose a known flood risk and the property subsequently floods, your insurance may deny coverage based on “misrepresentation” (failure to disclose known risk to the insurer).
• DHCR investigation holds: Tenants can file complaints with DHCR. Investigations can delay lease renewals and complicate portfolio management.
• Attorney General enforcement: The NY Attorney General’s office can initiate pattern-and-practice investigations against landlords with multiple non-compliance incidents, resulting in consent decrees and ongoing oversight.

Common Compliance Mistakes Landlords Make

Mistake 1: Treating the Disclosure as a Lease Addendum

What landlords do: Include flood disclosure language as a paragraph in the lease itself (e.g., “Tenant acknowledges property is in Flood Zone AE”). Tenant signs the lease on move-in day.

Why this fails: The statute requires disclosure “prior to the execution of a lease,” not as part of the lease. A disclosure buried in lease boilerplate, signed after the lease is executed, does not comply. Courts have ruled that the intent is to give tenants a pre-lease opportunity to inspect and consider flood risk before committing.

Correct approach: Provide the disclosure separately, in a standalone document, 5+ days before the lease signing. Collect separate acknowledgment. Then have the tenant sign the lease.

Mistake 2: Relying on FEMA Maps Alone

What landlords do: Check FEMA’s Flood Map Service Center, see “no SFHA designation,” and conclude the property is not in a flood zone. No disclosure given.

Why this fails: Many municipalities have adopted flood maps that exceed FEMA designations, especially post-Hurricane Sandy. New York City, for example, has properties outside FEMA zones but within the city’s “Flood Hazard Overlay District” that still require disclosure. Additionally, local flood studies and preliminary FIRMs may identify areas not yet in the official FEMA map.

Correct approach: Check both FEMA and local maps. Contact the city/county planning department. When in doubt, disclose. The burden of proving compliance falls on you, not the tenant.

Mistake 3: Saying “No Documented History” Without Adequate Research

What landlords do: Ask the tenant if they know of any flooding, get a “no,” and disclose: “No documented flood history.”

Why this fails: You are legally obligated to conduct reasonable research, not rely on tenant (or prior owner) statements alone. If a water damage insurance claim was filed 10 years ago, or the property was damaged in Hurricane Irene (2011), that history exists in municipal or insurance records and must be disclosed.

Correct approach: Proactively research insurance records, municipal databases, newspaper archives, and prior owner interviews. If you cannot verify that no history exists, disclose what you found and note what you could not verify (“No evidence of flooding in municipal records; insurance history not available”).

Mistake 4: Failing to Retain Proof of Delivery and Acknowledgment

What landlords do: Email the disclosure to the tenant, assume they read it, and move forward with the lease.

Why this fails: If a DHCR complaint arises, you must produce proof that the disclosure was delivered and that the tenant acknowledged receipt. An email without read receipt, or a forwarded document without acknowledgment, is insufficient. The burden is on you to prove compliance; if you can’t produce the acknowledgment, DHCR presumes non-compliance.

Correct approach: Always collect a signed or emailed acknowledgment form. Use certified mail or email with read receipts for critical deliveries. Keep the acknowledgment in the tenant file alongside the lease.

Mistake 5: Failure to Update Disclosures When Property Status Changes

What landlords do: Disclose flood status in year 1. Property gets added to the city’s flood zone map in year 3. Tenant renews lease with no updated disclosure.

Why this fails: RPL §231-b applies to lease execution, including renewals and extensions. If the property’s flood status changes or previously unknown flood history surfaces, you must disclose before the renewed lease is signed.

Correct approach: Re-check flood maps and history before each lease renewal. If anything has changed (new city map, new insurance claim, new municipal flood study), provide an updated disclosure.

How to Verify Your Flood Zone Status: Tools and Resources

Federal Resources

• FEMA Flood Map Service Center: https://www.msc.fema.gov. Search by address. Provides SFHA designation, flood zone (A, AE, V, etc.), and base flood elevation. Download and save the map.
• FEMA Flood Insurance Rate Map (FIRM): Visual representation of flood zones by community. Available through county tax assessor offices and online.

New York State Resources

• NYS DEC Flood Risk Database: https://gis.dec.ny.gov. Searchable database of flood risk areas and flood response zones.
• NYS DEC Dam Inundation Maps: https://www.dec.ny.gov. Shows areas at risk from dam failure; relevant for upstate properties.

New York City–Specific Resources

• NYC Flood Hazard Mapper: https://flood.cityofnewyork.us. Interactive map showing flood zones, storm surge zones, areas at risk from tidal and stormwater flooding. Most accurate for NYC.
• CEQR/NYC Environmental Assessment Scoping: Includes flood risk analysis for development projects; searchable by address.

Local Municipal Resources (Non-NYC)

• County assessor websites: Often link to flood maps and FIRMs.
• Municipal planning departments: Can confirm flood zone designations and any local flood overlays or restrictions.
• County emergency management agencies: Maintain records of flood events, emergency declarations, and damage assessments.

Flood Disclosure and Lease Operations: Integration Best Practices

If you’re managing multiple properties or leasing frequently, integrate flood disclosure into your lease operations workflow to avoid missed deadlines. Here’s the recommended sequence:

1. Property Intake (Day 1–7): Research flood zone status and history. Document findings.
2. Tenant Application (Day 8–14): Once a tenant is approved, prepare the disclosure notice immediately. Do not proceed to lease signing without sending it first.
3. Disclosure Delivery (Day 15–20): Deliver disclosure via certified mail or email with read receipt. Give tenant 5 business days to review.
4. Acknowledgment Collection (Day 21–25): Collect signed acknowledgment form. Do not sign the lease until you have this in hand.
5. Lease Execution (Day 26): Once acknowledgment is received, execute the lease.
6. File Retention (Day 27+): Store disclosure, acknowledgment, and supporting documentation in the tenant file. Retain for 3 years post-move-out.

Using a property management platform with built-in compliance checklists can automate reminders and flag missing acknowledgments before you execute a lease. Many landlords using spreadsheets or manual processes miss deadlines because flood disclosure is easy to overlook when juggling multiple units.

Recent Enforcement Actions and Regulatory Trends (2024–2026)

The New York Department of Housing and Community Renewal (DHCR) has increased enforcement of RPL §231-b, particularly post-2023. Here’s what we’re seeing:

Pattern 1: Systematic Audits of Multi-Unit Buildings

DHCR has begun requesting lease files from landlords managing buildings in designated flood zones or areas affected by recent flooding (Hurricane Ida, 2021 nor’easters, etc.). They cross-reference lease dates with disclosure delivery dates. Missing or late disclosures are presumed violations.

Pattern 2: Tenant Complaints Triggering Portfolio Investigations

A single complaint from one tenant often triggers a broader inquiry into the landlord’s practices. If one tenant reports non-disclosure, DHCR requests files for all other tenants in the building. Portfolio-wide violations result in significantly higher penalties.

Pattern 3: Attorney General Involvement in Large-Scale Non-Compliance

The NY Attorney General’s Consumer Frauds Bureau has filed civil enforcement actions against management companies with systemic RPL §231-b violations. Settlements have included penalties exceeding $500,000 and mandatory compliance audits for 5+ years.

Pattern 4: Increased Scrutiny of “No History” Statements

DHCR is requiring landlords to produce evidence of their research efforts. Vague disclosures like “No documented flooding” without supporting documentation (FEMA maps, municipal records, insurance inquiry letters) are treated as presumptively false.

Key takeaway for landlords: Your compliance posture should assume DHCR will audit your files. Organize documentation as if a regulator will review it. Take screenshots of maps. Document research steps. Retain acknowledgment signatures. This defensive approach is now standard practice.

Frequently Asked Questions (FAQs)

Q1: What counts as “flood history”? If a basement had moisture issues 20 years ago but the owner didn’t file an insurance claim, do I have to disclose it?

The statute defines flood history as documented flooding or water damage events. “Documented” means there’s a record: an insurance claim, a municipal emergency declaration, an inspection report, newspaper coverage, or similar evidence. If there’s no record and you cannot verify it occurred, technically you don’t have to disclose it.

However, if you know or reasonably should know about past water issues, you have an affirmative duty to investigate. If you purchase a building and the prior owner mentions moisture problems, you must research whether there’s any documentation (past insurance records, building permits for sump pump installation, etc.). If you find documentation, you disclose. If your investigation turns up nothing, you can disclose “No documented flood history found after review of insurance records and municipal records.”

Best practice: Disclose what you found and what you couldn’t verify. E.g., “Insurance records from prior owner not available; no flood events recorded in municipal database as of [date].”

Q2: I’m leasing a property for the first time. How far back do I need to research flood history?

The statute does not specify a time limit for flood history, but courts and DHCR generally expect a 30-year lookback period (the lifespan of a typical mortgage). For events older than 30 years, reasonable efforts to research (checking municipal records, speaking to prior owner, insurance query) satisfy the obligation.

Practical standard: Research back 30 years from the lease date. If you find nothing in municipal records or insurance databases, you can disclose “No documented flood history in past 30 years based on available records.”

Q3: My property is not in a FEMA flood zone, but it’s in the local city flood map. Do I have to disclose?

Yes. The statute includes properties in FEMA zones or in local flood designations. If your city or county has identified the property as being in a flood-prone area (even if FEMA doesn’t), you must disclose. Many municipalities, especially coastal cities and those with poor drainage, have more restrictive flood maps than FEMA.

Action item: Always check both FEMA and local maps. If either says “flood zone,” disclose.

Q4: A tenant flooded during their lease, and they’re now claiming I didn’t disclose. Can they rescind the lease? What’s my liability?

Yes, tenants can seek rescission of the lease (termination + return of all rent paid) plus damages if you failed to disclose flood risk. The fact that flooding occurred is circumstantial evidence of non-disclosure, though not conclusive. Your defense is to produce the disclosure notice and the tenant’s written acknowledgment.

If you have documentation: You have a strong defense. Produce the disclosure and acknowledgment; courts presume compliance if you can show proof.

If you don’t have documentation: Burden shifts to you to prove you did disclose. No documentation = presumption of non-compliance. Liability can include rescission, plus damages for any flood-related losses, plus attorney fees.

Q5: I inherited a property from my parents who never disclosed. An existing tenant is now complaining. What’s my exposure?

If the tenant’s lease predates your ownership and the prior owner didn’t disclose, the tenant’s claim runs against the prior owner’s estate, not you (generally). However, if you renewed the tenant’s lease after inheriting the property, you trigger a new disclosure obligation under RPL §231-b. If you renewed without disclosing, you are liable for the violation.

Action item if you inherited property with existing tenants: Before renewing any lease, provide the required disclosure. You are responsible for compliance going forward, even if prior disclosures were missed.

Integrating Flood Disclosure with Your LeaseBase Compliance Workflow

Managing flood disclosure across multiple units is easier when your lease operations are centralized. Platforms that track lease dates, tenant acknowledgments, and document retention can flag disclosure deadlines and ensure you’re not executing leases prematurely.

LeaseBase’s compliance engine tracks state-specific requirements like RPL §231-b and alerts you before lease execution if critical disclosures are missing. Similarly, lease operations tools create a structured workflow that sequences disclosure delivery, acknowledgment collection, and lease signing in the correct order—reducing the risk of missed compliance steps.

For landlords managing portfolios across multiple New York municipalities—each with different flood maps and local requirements—our compliance platform centralizes this information so you’re not manually checking FEMA, NYC Flood Hazard Mapper, and local county databases for each property.

Compliance Timeline Summary