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Monroe County, FL Historic Preservation: Historic-Cultural Monuments (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

HPC size
5 members
Designation criteria categories
4 under § 135-4(a)
Age exception threshold
Under 50 yrs, exceptional only
Final designation authority
BOCC by resolution
Hearing notice radius
300 feet, 15 days

Summary

Monroe County's Historic Preservation Commission can recommend any building, site or object for historic landmark status if it is tied to significant history, notable people, distinctive architecture, or likely archaeological information. Section 135-4 sets the four criteria the HPC and BOCC use in the unincorporated Keys.

These county ordinances apply to unincorporated areas of Monroe County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

(a)The HPC may recommend the designation as historic property those buildings, sites, structures, or objects that possess integrity of location, design, setting, materials, workmanship, feeling, and/or association as follows:(1)Property that is significant in the history of the county, the state, or the United States, or is associated with events that are significant in the history of the county, the state or the United States;(2)Property that is associated with lives of individuals significant in the past;(3)Property that embodies the distinctive characteristics of a type, period, or method of construction, or that represents the work of a master, or that possesses high artistic values, or that represents a significant and distinguishable entity whose components may lack individual distinction; or(4)Property that has yielded or may be likely to yield information important in prehistory or history.

Full Breakdown

Monroe County Land Development Code Section 135-4 gives the five-member Historic Preservation Commission, appointed by the Board of County Commissioners under Section 135-3, the criteria it uses to recommend designating a building, site, structure or object as an archaeological, historic or cultural landmark in the unincorporated Keys. A property qualifies if it is significant in the history of the county, the state or the United States, or associated with a significant historic event; if it is associated with the life of a historically significant individual; if it embodies the distinctive characteristics of a type, period or method of construction, represents the work of a master, possesses high artistic value, or represents a significant entity whose individual parts might otherwise lack distinction; or if it has yielded, or is likely to yield, information important to prehistory or history.

Cemeteries, birthplaces, religious properties, moved or reconstructed buildings, purely commemorative sites and anything less than 50 years old are ordinarily excluded, but the section carves out exceptions for a religious property with independent architectural or historical distinction, a birthplace or grave of outstanding importance with no better-associated site, a reconstructed building done under the article's own rules, and a property under 50 years old of exceptional importance. Once the HPC recommends designation, the Board of County Commissioners makes the final call by resolution after its own public hearing, and the property owner receives a certified copy of that resolution once the clerk of the circuit court files it.

Violations & Fines

Work on a designated historic property or anything within the Tavernier Historic District without a certificate of appropriateness violates Section 135-6, since a building, moving or demolition permit cannot issue without one first. Demolition by neglect, meaning abandonment that leaves a structure's collapse inevitable, exposes the owner to code enforcement action separate from the designation process itself.

Frequently Asked Questions

Who decides if a property becomes a historic landmark in Monroe County?
The five-member Historic Preservation Commission, appointed by the Board of County Commissioners, reviews the application against the Section 135-4 criteria and recommends approval or denial. The BOCC then holds its own public hearing and makes the final designation by resolution.
What makes a building eligible for historic designation in the unincorporated Keys?
Under Section 135-4(a), it must be significant in county, state or national history, tied to a historically significant person, an example of distinctive or master-crafted architecture, or likely to yield important archaeological or historical information. Any one of those four criteria is enough to support a recommendation.
Can a building less than 50 years old be designated historic?
Only if it is of exceptional importance. Section 135-4(b) ordinarily excludes properties that have achieved significance within the past 50 years, along with cemeteries, moved buildings and purely commemorative sites, but allows each of those categories back in through narrow, defined exceptions.

Sources & Official References

Other rules in Monroe County

All Monroe County rules

Florida rules heatmap·Compare Monroe County to another location·View the Florida historic preservation overview

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