Miami Permit Guide · 2026

ADU / Garage Conversion Permits
in Miami, FL

Permit fees for a ADU or garage conversion in Miami typically run $975–$3,875. Here's exactly which permits you need, what they cost, and how long FL review takes.

Do you need a permit for a ADU or garage conversion in Miami?

Always — converting space into a dwelling unit triggers full plan review, zoning approval, and utility sign-offs in Miami. Permit fees for a typical $193,797 ADU or garage conversion run about $975–$3,875 (valuation-based fee plus plan review), and FL plan review typically takes 3–6 weeks.

Permits you'll likely need

Building

full plan review for the dwelling conversion

Zoning / occupancy

ADU ordinance compliance and occupancy approval

Utilities

sewer, water, and electrical service connections

Fire / egress

separate egress and smoke/CO requirements

Usually exempt

Nothing meaningful — every part of a ADU or garage conversion runs through permitting. Budget for it up front.

FL permit note

Hurricane Straps & Wind Mitigation: Florida requires specific wind-resistant construction methods that can significantly impact insurance rates Reddit users emphasize getting a wind mitigation inspection—hurricane straps, secondary water barriers, impact windows, and roof-to-wall connections can reduce insurance by 20-45%. Any roofing work should include these upgrades.

How to get ADU or garage conversion permits in Miami

1
Confirm what triggers a permit
Building, Zoning / occupancy, Utilities, Fire / egress permits apply when the scope includes full plan review for the dwelling conversion. Cosmetic-only scopes may be exempt.
2
Budget the fee
Plan for $975–$3,875 in Miami — a valuation-based fee on a typical $193,797 project plus plan review.
3
Apply with complete documents
Submit scope, drawings, and contractor license info to the Miami building department. FL plan review typically takes 3–6 weeks.
4
Verify it in the bid
A complete Miami bid lists permit fees as a line item. If a bid omits permits — or suggests skipping them — analyze it before signing.

ADU / Garage Conversion permits in Miami: FAQ

Do I need a permit for a ADU or garage conversion in Miami?

Always — converting space into a dwelling unit triggers full plan review, zoning approval, and utility sign-offs in Miami, FL. When in doubt, call the Miami building department before work starts — unpermitted work can block a future sale.

How much do ADU or garage conversion permits cost in Miami?

Expect roughly $975–$3,875 in Miami for a typical $193,797 ADU or garage conversion. Most jurisdictions charge a valuation-based fee of about 0.5–2% of project value, plus plan review and per-trade permit minimums.

How long does a ADU or garage conversion permit take in Miami?

Simple trade permits are often issued over the counter in Miami. Where plan review applies, FL turnaround typically runs 3–6 weeks. Submit complete drawings the first time — resubmittals are the most common cause of delay.

Who pulls the permit — me or my contractor?

Usually your contractor pulls permits for a ADU or garage conversion, and their license is attached to the work. A contractor who asks you to pull an owner's permit for contractor-performed work is shifting liability onto you — treat that as a red flag when reviewing bids.

More Miami permit guides

ADU / Garage Conversion permits in other FL metros

Is your ADU or garage conversion bid fair?

A typical Miami ADU or garage conversion runs $193,797. Check your contractor's bid — permits included — against live 2026 local data, free.

Miami ADU or garage conversion costs AUDIT MY BID

Data sources: Zonda Cost vs Value 2025; Houzz 2024 Cost Guides; BLS OEWS 2023; FRED regional price indices; Reddit homeowner & contractor reports.

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ADU / Garage Conversion Permits in Miami, FL