Figure out your jurisdiction first

Clay County has four incorporated cities that each run their own building programs — Green Cove Springs, Orange Park, Keystone Heights, and Penney Farms — plus unincorporated areas like Middleburg, Fleming Island, Oakleaf, and the fast-growing First Coast Expressway corridor, which permit through the county instead. Your mailing address alone won't tell you which applies.

The cleanest way to check: look up your parcel on the Clay County Property Appraiser's website and check its tax jurisdiction code. As one example, Green Cove Springs' own guidance says code "002" means you're inside city limits (permit with the city), while "001" means you're in the county's jurisdiction (permit with the county) — other cities may use different codes, so confirm for your specific parcel.

Unincorporated Clay County

Covers Middleburg, Fleming Island, Oakleaf, and the First Coast Expressway growth corridor. Permitting and Development Services recently relocated to the new Development Services Building at 435 Walburg Street, Green Cove Springs, FL 32043. Applications go through the county's Citizens Access Portal, and general questions can be emailed to buildingdivisionplanreview@claycountygov.com.

Green Cove Springs (the county seat)

Green Cove Springs runs its own Building Division and explicitly requires fence permits. The City Council recently updated its fence ordinance, removing some older requirements around fence transparency, chain-link-specific rules, and fencing around stormwater ponds — so current rules may be less restrictive than older information you find elsewhere suggests. Building permits are still required for walls. General permit questions: (904) 297-7050; fence-ordinance-specific questions: (904) 297-7500 ext. 5.

Orange Park

A separate incorporated town with its own zoning authority. The Orange Park Zoning Department is located at 2042 Park Avenue, Orange Park, FL 32073, (904) 264-2635.

Keystone Heights & Penney Farms

Both smaller, more rural incorporated towns that also run their own permitting rather than going through the county. If your property is within either town's limits, contact their town hall directly rather than the county.

Recent change: Starting July 1, 2026, Florida's HB 803 exempts certain single-family home improvements under $7,500 from needing a building permit. Clay County has published its own guidance on this and requires the exemption to be requested in advance by emailing the Building Division — you can't simply skip the permit and assume you qualify, and splitting a project into smaller pieces to stay under the threshold isn't allowed.
This isn't legal advice. With five different jurisdictions potentially in play across Clay County, confirming which one actually governs your property is the single most important step before anything else. Always verify directly with the relevant office — or ask the contractor quoting your job, since working across these jurisdictions regularly is routine for a local installer.
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