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Santa Rosa County, FL Accessory Structures: ADU Rules (2026)

Some Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified July 2026

ADU rules in Santa Rosa County, FL, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.

Key Facts

Applies to: Unincorporated county (all residential)
Max size: 50% of main dwelling floor area
Front setback: 60 ft or behind rear wall
Kitchen test: Stove/oven = guest cottage
Code section: LDC 5.02.06

ADU Eligibility Quick-Check

An Accessory Dwelling Unit (ADU) is a smaller, independent living unit on the same lot as a single-family home: converted garages, detached cottages, basement or attic conversions, and attached additions all qualify. Most states have streamlined ADU permitting since 2020, but local rules still control size, height, and setback.

Is your lot zoned single-family or multi-family residential?
Does your lot have at least 1,200 sq ft of buildable space?
Is your existing home owner-occupied (in most states this is not required, but some require it for ADU permits)?
Will the ADU stay under your state's size cap (commonly 850-1,200 sq ft for detached)?
Can you provide one off-street parking space (waived in many states within 0.5 mi of transit)?

If you answered 'yes' to most of these, you likely qualify in Florida under recent ADU streamlining laws. The Santa Rosa County, FL rules below cover local size, height, and setback requirements.

Summary

Unincorporated Santa Rosa County allows a guest cottage (accessory dwelling / ADU) in every residential district. It may not exceed 50% of the main dwelling's floor area, needs a 60-foot front setback (or to sit behind the home's rear wall), and must meet the Florida Building Code.

These county ordinances apply to unincorporated areas of Santa Rosa County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

The guest cottage shall not occupy more than 50% of the total floor area square footage of the main dwelling... The guest cottage shall have a front setback of 60 feet from the front property line or be behind the rear wall of the single family residence and shall maintain the same side and rear setbacks for the principle dwelling.

View official code

Full Breakdown

Under LDC 5.02.06, a guest cottage is allowed as an accessory use in all residential districts. It cannot occupy more than 50% of the main dwelling's total floor area (50% of heated area in Agriculture zoning), as determined by the Property Appraiser. It must have a 60-foot front setback or sit behind the home's rear wall, keeping the principal dwelling's side and rear setbacks and the district height limit. An accessory structure WITH a stove and/or oven is defined as a guest cottage; without one it is not. No mobile home or RV counts as a guest cottage, and it must meet the Florida Building Code. Cities (Milton, Gulf Breeze, Jay) set their own rules.

Violations & Fines

Building without required permits or meeting cottage standards violates the LDC; the county can require permitting, correction, or removal and impose code-enforcement fines.

Frequently Asked Questions

Can I rent out my guest cottage?

The LDC treats it as accessory living quarters, not a separate rental unit; short-term rental and occupancy are governed separately. Confirm zoning and any HOA rules with Development Services before renting.

Does a mother-in-law suite need a full kitchen?

Adding a stove or oven makes the structure a guest cottage under LDC 5.02.06.4, triggering cottage setbacks, size limits, and Florida Building Code review. Without cooking appliances it stays a non-dwelling accessory structure.

Sources & Official References

Other rules in Santa Rosa County

Noise Ordinances: Construction HoursSome Restrictions Shed & Carport RulesSome Restrictions Garage ConversionsSome Restrictions Tiny HomesSome Restrictions Noise Ordinances: Barking DogsSome Restrictions Noise Ordinances: Leaf Blower RulesSome Restrictions Noise Ordinances: Vehicle NoiseSome Restrictions Noise Ordinances: Amplified Music & Outdoor SoundSome Restrictions Fence Regulations: Material RestrictionsSome Restrictions

All Santa Rosa County rules

How Santa Rosa County compares: Easiest Cities to Build an ADU·Florida rules heatmap·Compare Santa Rosa County to another location·View the Florida accessory structures overview

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