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Marathon Office

Janice Antetomaso

2798 Overseas Hwy.

Suite 330
Marathon, FL 33050
Ph: (305) 289-2501

Key Largo Office

Lisa McGilvra

Murray Nelson Government & Cultural Center

102050 Overseas Hwy.
Key Largo, FL 33037
Ph: (305) 453-8800

Crystal Sebben

11601 CR 905
Key Largo, FL 33037
Ph: (305) 453-8765


Stock Island Office
5503 College Road
Suite 203
Key West, Fl 33040
Ph: (305) 295-3990

Lobby Hours

Effective December 31, 2017:

All Building Plans Submitted must comply with the Florida Building Code SIXTH Edition

Gearing up for FBC 6th Edition FBC changes to FLOOD Provisions. 

Click Here to find more details on flood provision changes in new FBC 6th edition.



The building Department is responsible for 
administering and enforce all ordinances
applicable to building, construction, blasting, and explosives as defined in the Monroe County Code.

Building officials are charged with administering and ensuring compliance with building codes. They issue building and construction permits and certificates of occupancy and supervise blasting within the county.


Inspectors are assigned to county offices in Marathon and Key Largo. At specified stages during building construction, the builder/contractor must request an inspection. Inspections are necessary before proceeding with construction and prior to the issuance of a Certificate of Occupancy.

Mission Statement
The mission of the Building Department is to protect public health and safety, property, and the environment by providing an efficient, effective, and considerate permitting and code administration system, in accordance with the Monroe County Code and Florida statues that is consistent with and furthers the Monroe County Comprehensive Plan.

Monroe County
1100 Simonton Street
Key West FL, 33040