Florida, Union County HVAC Permit Regulations and County Ordinances for Unincorporated Areas
Union County Building Department
The Union County Building Department is responsible for issuing building permits and enforcing construction regulations within the county. This includes properties in unincorporated areas.
HVAC Permit Requirements
In Florida, HVAC permit requirements are determined at the county level, operating within the framework of the Florida Building Code. Union County issues combination permits that cover all trades working on a single site. Licensed contractors are typically responsible for pulling permits, except in specific owner-builder scenarios.
Permit Application Process for Unincorporated Areas
For properties in unincorporated areas of Union County, obtaining a building permit requires several items, including:
- A Letter of Compliance/Flood Data from the Union County Building Department (a fee applies).
- Proof of payment of Special Assessment Tax.
- A 911 address and the posting of house numbers.
- A survey and legal description of the property.
- If the property is in a flood zone, base flood elevation and a Flood Elevation Certification with the first-floor elevation are necessary.
- All contractors and subcontractors must be licensed with the State of Florida and approved by the Union County Building Department prior to permit issuance.
- Two sets of plans, drawn to scale with specifications and details, are required.
Union County has partnered with Cloudpermit, a cloud-based software, to allow for online application, status checking, inspection scheduling, and payment of permit fees.
Resources to Learn More
Note: The following state-wide building codes and regulations apply universally to all jurisdictions within Florida, including Union County.
Florida Hvac Legislation, Codes, and Guidelines
Florida HVAC Building Codes and Legislation
The Florida Building Code (FBC) is a unified, statewide set of construction and systems standards adopted under Chapter 553 of the Florida Statutes. The code is updated on a triennial cycle, incorporating model codes from the International Code Council (ICC) with Florida-specific amendments designed to address the state's subtropical climate, high humidity, and hurricane exposure. As of early 2026, the state operates under the 8th Edition (2023) of the Florida Building Code, with the 9th Edition (2026) currently in development and expected to take effect on December 31, 2026.
HVAC standards in Florida are primarily contained within two volumes of the FBC:
- Florida Building Code – Mechanical: Based on the International Mechanical Code (IMC), this volume governs installation methods, duct construction, ventilation rates, and equipment clearances.
- Florida Building Code – Energy Conservation: This volume establishes minimum efficiency ratings for HVAC equipment, duct leakage testing requirements, and energy performance pathways. It is informed by standards such as ASHRAE 90.1 for commercial occupancies and the International Energy Conservation Code (IECC) for residential buildings.
Primary Regulatory Agencies
The standards are administered and enforced by the following entities:
- Florida Building Commission: Operating under the Florida Department of Business and Professional Regulation (DBPR), this body is responsible for the development, maintenance, and triennial update of the Florida Building Code.
- Local Building Departments: County and municipal building departments are responsible for the enforcement of the FBC through the permitting and inspection process. Florida law generally requires a building permit for the installation or replacement of HVAC systems.
- Construction Industry Licensing Board: This board oversees the licensing of contractors, ensuring that HVAC work is performed by qualified professionals in accordance with state statutes, such as Chapter 489, which governs contractor licensing and permit requirements.
Resources to Learn More