Monroe County, FL Building Setbacks & Zoning: Setback Rules (2026)
Key Facts
- Suburban Residential (SR)
- 25 ft front, 10 ft side, 10 ft rear
- Urban Residential/Commercial (UR/UC)
- 15 ft front, 10 ft side, 10 ft rear
- Destination Resort (DR)
- 50 ft front, 30 ft rear
- URM mobile home lots <50 ft wide
- 10 ft on all sides
- Bufferyard substitution
- Wider bufferyard can replace setback (§131-3(a))
- Setback-exempt features
- Utility poles, fences, seawalls, marginal docks
Summary
Every parcel in the unincorporated Florida Keys must meet a minimum front, side and rear yard setback set by its land use district under Land Development Code Section 131-1. A Suburban Residential lot needs 25 feet in front and 10 feet on the sides, while a Destination Resort parcel needs 50 feet in front and 30 feet in the rear, the widest setbacks Monroe County requires.
(a)Unless otherwise allowed for in this Land Development Code, no structure or land shall be developed, used or occupied except in accordance with the bulk regulations set out in the following table. Land Use District/ Land Use Primary Front Yard (ft.)*** Secondary Front Yard (ft.)*** Primary Side Yard (ft.)*** Secondary Side Yard (ft.)*** Rear Yard (ft.)*** ... Suburban Residential (SR) 25 15 10 5 10 ... Urban Residential (UR): 15 15 10 5 10
Full Breakdown
Every parcel in the unincorporated Florida Keys carries a minimum yard setback set by its land use district under Land Development Code Section 131-1, and the code states plainly that no structure or land shall be developed, used or occupied except in accordance with that bulk regulations table. The setbacks are broken into a primary front yard, secondary front yard, primary side yard, secondary side yard and rear yard, because many Keys lots have double road frontage. A Suburban Residential (SR) lot needs a 25-foot primary front yard, 15-foot secondary front yard, 10-foot primary side yard, 5-foot secondary side yard and 10-foot rear yard.
Urban Residential (UR) and Urban Commercial parcels drop to a 15-foot front yard with the same 10/5/10 side and rear pattern, while a Destination Resort (DR) parcel needs 50 feet in front, 20 and 15 feet on the sides and 30 feet in the rear, the widest setbacks in the table. Mobile home lots in the Urban Residential Mobile Home (URM) district get reduced setbacks of 10 feet on lots under 50 feet wide. Section 131-3 fills in how the table applies: a bufferyard wider than the required setback can substitute for it along the same property line, and the setback rule does not apply to utility poles, utility racks, seawalls, fences, retaining walls or marginal docks. 4.
Violations & Fines
Building or expanding a structure that violates the Section 131-1 setback table is not permitted; the Building Department will not issue a permit for plans that encroach on a required yard without qualifying for one of the Section 131-3 exceptions, such as a wider bufferyard or a flood-elevation retrofit. A structure already built over its setback becomes a nonconforming structure subject to Section 102-57's limits on rebuilding after damage, and code enforcement can pursue a case before the special magistrate for an unpermitted encroachment.
Frequently Asked Questions
How wide is the required front yard setback in the Florida Keys?
Does a fence have to meet the setback?
Can I put a driveway or patio inside my required setback?
Sources & Official References
Other rules in Monroe County
Florida rules heatmap·Compare Monroe County to another location·View the Florida building setbacks & zoning overview
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