Nassau County, Florida
Town of Callahan is a town in Nassau County, Florida. Town of Callahan adopts its own zoning, so inside its limits Town of Callahan’s rules apply, not the county’s. Septic permits inside Town of Callahan come from the state health agency. 12 rules below are quoted from official sources and independently re-checked, most recently on November 1, 2026. Rules for unincorporated land are on the Nassau County page.
Land inside Callahan town limits (Town of Callahan, Nassau County, Florida) regulated by the Town of Callahan Zoning Ordinance, Chapter 195
“the provisions of this chapter shall become effective on may 2, 2016.”
Zoning districts inside Callahan town limits
“article xi rld residential low density district § 195-63. intent.”
Dwellings in the RLD Residential Low Density district inside Callahan town limits
minimum heated and cooled floor area: >= 1000 square feet
“§ 195-69. building restrictions. building restrictions shall be as follows: a. maximum building height: 35 feet. b. minimum building square foot: 1,000 (heated and cooled).”
Single-family lots in the RLD Residential Low Density district inside Callahan town limits
minimum lot width: >= 50 feet · minimum lot area: >= 7500 square feet
“§ 195-67. minimum lot requirements. minimum lot requirements shall be as follows: a. minimum lot width: 50 feet. b. minimum lot area: 7,500 square feet.”
Main buildings on lots in the RLD Residential Low Density district inside Callahan town limits
front yard setback: >= 25 feet · side yard setback: >= 10 feet · rear yard setback: >= 15 feet
“§ 195-68. minimum yard requirements. the minimum yard requirements shall be as follows: a. front yard: 25 feet. b. side yard: 10 feet. c. rear yard: 15 feet.”
Buildings in the RLD Residential Low Density district inside Callahan town limits
maximum building height: <= 35 feet
“§ 195-69. building restrictions. building restrictions shall be as follows: a. maximum building height: 35 feet. b. minimum building square foot: 1,000 (heated and cooled).”
Recreational vehicles used as temporary dwellings in Callahan town, limited to RV parks
minimum RV park size: >= 6 acres (contiguous acres) · maximum rental term per single user: <= 3 months
“(2) space may be rented to a single user for up to three months. (3) all rv parks must be at least six contiguous acres.”
Mobile homes placed for occupancy inside Callahan town limits, in any district
“c. no mobile home may be installed unless it is constructed in accordance with the standards that applies to the state's wind zone restrictions on the installation of mobile homes map. as of 2014, this is 100 miles per hour for nassau county.”
Building and zoning permits in Callahan town
“building permits and zoning applications for a list of applicable fees, click here”
Building and zoning permit applications submitted to the Town of Callahan
stated processing time: <= 48 hours (some permits)
“these forms and any questions can be submitted to our building and zoning administrator: [email protected] **please note that some permits can take up to 48 hours**”
Town of Callahan does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.
Onsite sewage (septic) systems on land inside Callahan town limits, administered by the Florida Department of Health in Nassau County (Environmental Health), which the town does not appear to displace. Recorded as health-district scope because the schema does not allow municipality-specific scope for health districts.
“we manage the installation and maintenance of onsite sewage treatment and disposal systems (ostds), commonly known as septic tanks”
Potable and irrigation wells on land inside Callahan town limits
“we oversee the permitting of potable wells, irrigation wells, and well abandonment to ensure all water sources meet safety standards.”
We looked and could not find an official answer yet. Silence is not permission; ask Town of Callahan or Nassau County directly.
Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.
Unanswered questions are usually a sign that Town of Callahan publishes no rule on the point, not that none exists. Nassau County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Town of Callahan means bringing your own water and power. The kit we’d start with:
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