Florida ADU ROI Calculator
Calculate the return on investment for an accessory dwelling unit in Florida
Florida Calculator
Get accurate results
Updated for 2025 with real Florida rates, brackets, and regulations
Florida passed Senate Bill 714 in 2024, requiring all local governments to allow accessory dwelling units (ADUs) on single-family lots. This landmark legislation overrides local zoning restrictions and opens ADU opportunities statewide. ADUs in Florida can generate $1,200-2,500/month in rental income depending on location, making them attractive for supplementing retirement income or housing family members. Our calculator estimates your ADU construction costs, potential rental income, and return on investment based on your Florida location.
Calculate Your FL Tax
10-Year Total ROI
151.7%
Monthly Rental Income
$1,800
Annual Net Income
$16,735
Cap Rate
9.07%
Payback Period
11.0years
Total Build Cost
$184,500
Property Tax Increase
$1,505/yr
Est. Value Added
$112,500
Breakdown
Insight
A detached ADU costing $184,500 generates $16,735/year net income (9.1% cap rate). Payback: 11.0 years. MAJOR FL UPDATE: SB 714 (signed 2024) allows ADUs on ALL single-family residential lots statewide, pre-empting local bans. Counties/cities can set size and setback rules but CANNOT prohibit ADUs. This is a game-changer for FL homeowners. FL's lower property tax rate (0.86%) compared to TX (1.80%) means less tax impact on your ADU investment. Factor in higher insurance costs for the ADU structure (~$1,200/year) and verify flood zone status. ADU rental income in FL's hot rental market (Miami, Tampa, Orlando) can be especially lucrative given 5-7% annual rent growth.
AI Explanation
What This Means
Based on default inputs, the Florida ADU ROI Calculator shows a 10-year total roi of 151.7 %. Key figures: Monthly Rental Income: $1,800, Annual Net Income: $16,735, Cap Rate: 9.07%, Payback Period: 11.0years, Total Build Cost: $184,500, Property Tax Increase: $1,505/yr, Est. Value Added: $112,500.
Key Insights
A detached ADU costing $184,500 generates $16,735/year net income (9.1% cap rate). Payback: 11.0 years. MAJOR FL UPDATE: SB 714 (signed 2024) allows ADUs on ALL single-family residential lots statewide, pre-empting local bans. Counties/cities can set size and setback rules but CANNOT prohibit ADUs. This is a game-changer for FL homeowners. FL's lower property tax rate (0.86%) compared to TX (1.80%) means less tax impact on your ADU investment. Factor in higher insurance costs for the ADU structure (~$1,200/year) and verify flood zone status. ADU rental income in FL's hot rental market (Miami, Tampa, Orlando) can be especially lucrative given 5-7% annual rent growth.
What You Can Do
Enter your actual figures in the calculator above for a personalized breakdown. Consider consulting a tax professional for comprehensive planning, especially for complex situations involving multiple income sources or deductions.
Keep In Mind
This calculator provides estimates based on 2026 rates. Actual tax liability may vary based on credits, exemptions, and other factors not captured here. This is for educational purposes only and should not be considered tax advice.
How the Florida ADU ROI Calculator Works
The Florida ADU ROI Calculator uses 2026 tax rates, brackets, and deductions specific to Florida to provide you with an accurate estimate of your tax obligations. Unlike generic federal-only calculators, this tool accounts for the unique tax structure that Florida residents face.
Formula
ADU ROI = (Annual Rental Income - Annual Costs) ÷ Total Investment × 100. Annual Costs = Property Tax Increase + Insurance + Maintenance + Utilities. Typical FL ADU cost: $150K-300K.Simply enter your financial details above, and the calculator instantly computes your results using the latest available data. All calculations happen directly in your browser — your personal information is never sent to any server or stored anywhere.
Why Use a Florida-Specific Calculator?
State-Specific Rates
Uses real 2026 Florida tax brackets, rates, and thresholds — not generic national averages that miss state-level nuances.
Local Programs & Exemptions
Factors in Florida-specific programs, exemptions, and deductions that national calculators simply don't account for.
Instant & Private
All calculations run locally in your browser. No account required, no data stored, no waiting for results.
AI-Powered Explanations
Get a plain-English breakdown of your results with actionable insights you can actually use for financial planning.
What's Included
SB 714 Statewide ADUs
Florida now requires all local governments to allow ADUs — know your rights under the new law.
Rental Income Projector
Estimate monthly rental income by Florida market: South FL, Central FL, and Panhandle.
Insurance Impact
Factor in increased homeowners insurance costs for properties with ADUs in Florida.
Frequently Asked Questions
Are ADUs legal everywhere in Florida?
Yes, as of 2024. Senate Bill 714 requires all Florida local governments to authorize ADUs on any lot where single-family homes are allowed. Local governments can set reasonable standards for size, setbacks, and parking but cannot prohibit ADUs outright. This is one of the most permissive ADU laws in the nation.
How much does it cost to build an ADU in Florida?
Florida ADU construction costs range from $150,000-$300,000+ depending on size, quality, and location. A 600 sq ft detached ADU averages $150,000-200,000. A 1,000 sq ft unit can reach $250,000-350,000 in South Florida. Garage conversions are cheaper at $80,000-150,000. Permitting costs vary by county.
Does an ADU affect my homestead exemption?
If you rent out the ADU, the portion of your property used for rental may not qualify for the homestead exemption. However, if a family member lives there rent-free, your homestead should remain intact. Consult your county Property Appraiser for specific guidance on how an ADU affects your assessed value.
What rental income can an ADU generate in Florida?
Monthly ADU rents vary by location: Miami/Fort Lauderdale $1,800-2,500, Orlando/Tampa $1,400-2,000, Jacksonville $1,100-1,600, Panhandle/rural $800-1,200. Short-term rentals (Airbnb) in tourist areas can earn significantly more but face varying local regulations.
How does an ADU affect my property insurance?
Adding an ADU increases your homeowners insurance premium — typically $800-2,000/year additional depending on the structure. You may need separate coverage for the ADU or an endorsement to your existing policy. If renting, you'll want landlord coverage rather than just homeowners insurance.
Important Information for Florida Residents
Tax laws in Florida can change annually. This calculator is updated regularly to reflect the latest 2026 rates and regulations, but you should always verify important financial decisions with a qualified Florida tax professional or CPA.
This tool is designed for informational and educational purposes. While we strive for accuracy using official Florida Department of Taxation data, the results should be used as estimates for planning purposes only. Your actual tax liability may differ based on credits, special circumstances, and legislative changes that occur after our last update.
For filing deadlines, payment schedules, and official forms, visit the Florida Department of Taxation and Finance website. If you have complex tax situations involving multiple states, business income, or significant investment gains, professional guidance is recommended.
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