Florida Construction Update: The New Palm Beach Flood-Plan Requirement That Can Stop Your Permit Review

What is a Flood Legend?

It is a standardized summary of the flood-related data needed for the county’s review. The memorandum explains that incomplete or inconsistent information causes delays, and the legend is intended to make submissions more consistent. It is not a substitute for a survey, an official flood determination or a complete design.

The county’s guide allows the information to be listed or placed in a clearly labeled legend on the survey, cover sheet, site plan or page A1. The guide states that all elevations provided must use NAVD 1988. Have your surveyor and design professional reconcile the data rather than mixing elevations from different references.

Sources: [2]

The eight items your team should coordinate

The county’s sample identifies the following information. Some items permit “N/A” when genuinely inapplicable; missing information should not be replaced with an unsupported assumption. Use the current official guide for your submission.

• Flood zone.
• Base Flood Elevation (BFE), or “N/A” where applicable.
• Flood Insurance Rate Map (FIRM) panel number.
• Lowest Adjacent Road Crown (LARC).
• Lowest floor elevation.
• Garage floor elevation, or “N/A” if there is no garage.
• Lowest machinery elevation.
• Type and location of the lowest machinery.

Sources: [2]

Why a generator or equipment project also deserves attention

The covered work includes standalone equipment installations, not only new homes. The county’s guide describes generator-specific substitutions, including the lowest elevation of the generator or generator/fuel-tank assembly and the relevant machinery servicing it, such as an automatic transfer switch or electrical panel.

The county’s Flood Information page also identifies an approved MEP Equipment Certificate for indicating elevations of applicable standalone mechanical, electrical and plumbing equipment. Ask the design professional and Floodplain Team how the documents apply to your scope. An equipment certificate should not be assumed to replace every other required document.

Sources: [1], [2]

Do not treat “substantial improvement” as an informal project label

Whether a project is considered a substantial improvement is a separate floodplain determination. A proposal described as a remodel or tenant improvement may still need that review. Ask the local floodplain administrator which valuation method, cost information and local rules apply before setting a final scope.

This article does not calculate a property’s threshold or declare a particular building compliant. The county directs owners to confirm flood information through appropriate Florida-licensed professionals. Early review is more useful than trying to solve an elevation or scope issue after permit documents have been filed.

Sources: [1]

Four practical steps before submitting your plans

First, verify whether the parcel is in unincorporated Palm Beach County and identify the permitting authority. Second, obtain the current flood information and available survey or elevation records through your qualified team. Third, have the design professional complete and reconcile the legend with the rest of the plans. Fourth, check the current county guide and any equipment documentation before submission.

For other Florida markets, use the same diligence process but obtain that jurisdiction’s requirements. The lesson is not that every county adopted this legend: it is that a state-level checklist alone may omit the local information a reviewer requires.

Sources: [1], [2], [3]