St. Johns County, FL

Building & Permitting Office

Department: St. Johns County Building Services (Building Department)

Address: 4040 Lewis Speedway, St. Augustine, FL 32084

Phone: 904-827-6800

Health Department (Septic & Well Permits)

Septic and well approvals run through the health department - most counties require the septic permit or existing-system approval before the move-on permit is issued.

Department: Florida Department of Health in St. Johns County

Address: 200 San Sebastian View, St. Augustine, FL 32084

Phone: 904-506-6081

Website:
https://stjohns.floridahealth.gov

Manufactured home requirements:

• Florida septic permits are now a state DEP program, but this county's health department Environmental Health office still takes the applications and issues the permits locally

Manufactured Home Notes

• Permits are required before most work begins; the county runs online permit application and search through its WATS web portal.
• Mobile/manufactured home zoning and placement in the unincorporated county are governed by the St. Johns County Land Development Code (posted at sjcfl.us/land-development-code/).

Florida installations follow FS 320 and Rule 15C-1/15C-2 (DHSMV) with licensed installers and installation decals; county building permits, tie-downs and wind-zone compliance apply.

County Packet: Mobile Home Forms (Checklist & Permit Application)

The county's own permitting packet, with our Manufactured Home Notes summary included as page 1. Source: county website, retrieved August 19, 2026.

Full County Code of Ordinances

Codes change often, so we link you straight to the county's official, always-current version.