ADUs are allowed in Unincorporated WashingtonTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Unincorporated Washington, FL
Is your property eligible for an ADU?
# of Properties
3,927
Owner-occupied
71%
Zoning districts
20
Avg Home Value
$118,661
Median Lot Size
4.96 acres
Avg Income
$58,860
Residential Types:
3,927 housing units
Single Family
4%
2-3 Family
1%
Condos
14%
Other
81%
Zoning Districts:
40,368 parcels · 20 districts
SHMU
59%(24,004)
AG/SIL
26%(10,494)
RL
9%(3,455)
CON
4%(1,546)
Other
2%(869)
ADU Rules
What can you build in Unincorporated Washington, FL?
Unincorporated Washington, FL follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: By Right
- –Detached ADU: By Right
Interior / Attached ADU Size Limits
- –Maximum size of 50% of the primary structure’s square footage for attached/internal ADUs to a single-family dwelling; no special permit to exceed.
Detached ADU Size Limits
- –Maximum size of 50% of the primary structure’s square footage
Max Units
- –1 ADU per lot (single-family residential lot).
- –1 ADU within any principal non-residential structure.
Owner Occupancy
- –No owner-occupancy requirement.
Parking
- –No specified ADU parking min/max; Planning Commission decides for unlisted uses; joint-use or deferred parking allowed; driveway may count in single-/two-family contexts.
ADU State Law
What can you build in Florida?
- –Florida does not have a statewide ADU mandate. There is no state-level requirement for cities or counties to allow ADUs.
- –ADUs in Florida are regulated entirely at the local level. Some jurisdictions allow ADUs broadly, others allow them with strict conditions, and some prohibit them altogether.
- –Florida Statute 163.31771 is optional. It allows local governments to adopt ADU ordinances for affordable housing, but it does not require any jurisdiction to allow ADUs, and local governments may adopt ADU rules outside of this statute.
- –County and city rules may differ. In unincorporated areas, county zoning controls whether ADUs are allowed; within city limits, municipal zoning codes apply.
What's allowed on your lot?
These are the municipality-wide rules. What's allowed on a specific property also depends on state laws, setbacks, floor area ratio, lot coverage, environmental constraints, topography, and other property-specific factors. Search your address on FutureLot to see what's allowed on your property.
Check my propertyHow can we help you?
Get matched with trusted local builders
Understand what's allowed on your property
Learn the key rules and size limits for ADUs
Is your property eligible for an ADU?
ADU rules in other Florida municipalities
Rules change at the town line. Check the municipality your property is actually in.
Washington County