Convert a Garage to an ADU in Miami - Permit Steps
Miami, Florida property owners who want to convert an existing garage into an accessory dwelling unit (ADU) must navigate local zoning, building-permit and inspection requirements. This guide explains the municipal steps, the departments that enforce rules, typical documentation, and practical actions to secure permits and a certificate of occupancy. Follow zoning verification, design and code compliance, permit application, inspections and final approval to avoid enforcement actions and delays. Links point to the City of Miami code, the Building Department and the Florida Building Code for official requirements and standards.
Preliminary checks
Before design work, confirm whether your property’s zoning district allows an ADU and any lot, setback, height or parking limitations. Consult the City of Miami Code of Ordinances and the Building Department for district-specific rules and allowable uses, and verify which code edition applies to structural and mechanical work.City of Miami Code of Ordinances[1] City of Miami Building Department[2] Florida Building Code[3]
Design, plans and code compliance
Prepare construction drawings sealed by a licensed architect or engineer showing floor plans, structural modifications, egress, fire separations, insulation, mechanical, electrical and plumbing changes, and any site-plan revisions for parking or landscaping to meet local standards.
- Site plan and survey showing lot lines, setbacks and existing structures.
- Construction drawings signed by a Florida-licensed design professional.
- Structural calculations for any foundation, roof or wall changes.
- Code compliance notes referencing the applicable Florida Building Code edition.
Permits & fees
Apply for building permits with the City of Miami Building Department. Fees, submittal checklists and permit portals are published by the city; fee amounts or specific schedules are often listed on the department’s permit pages or current fee schedules.
- Building permit application and plan set submission.
- Permit fees and impact fees as assessed at intake (see department schedule).
- Estimated review timelines depend on completeness and workload.
- Contact the Building Department for intake and scheduling.
Inspections & final approval
After permit issuance, schedule required inspections (footing/slab, framing, electrical, plumbing, mechanical, final). A final inspection and a certificate of occupancy or a final approval document will be issued once the ADU meets code and permit conditions.
- Sequential inspections tied to trades and structural milestones.
- Provide inspection access and required documentation at each visit.
- Receive a certificate of occupancy or final release when compliant.
Penalties & Enforcement
The City of Miami enforces building, zoning and code compliance through civil penalties, stop-work orders and court action when construction occurs without required permits or in violation of ordinances. Specific monetary fines and escalation amounts are set in the municipal code or administrative enforcement rules; where a figure is not listed on the cited page it is stated below as such.
- Monetary fines: not specified on the cited page for garage-to-ADU conversions; consult the Code of Ordinances enforcement sections for numeric schedules.[1]
- Escalation: the code provides for initial notices, repeat violations and continuing-violation daily fines where applicable; exact ranges are not specified on the primary pages cited here.[1]
- Non-monetary sanctions: stop-work orders, orders to remove unauthorized structures, administrative hearings and civil court actions are authorized by municipal code.
- Enforcer: City of Miami Building Department and Code Compliance divisions enforce permits and zoning; complaints and inspection requests go through official department contact pages.[2]
Applications & Forms
The Building Department publishes permit application forms, plan check submittal checklists and fee schedules. Name/number and fee lines vary by project; if a specific form number or fee is required it should be confirmed on the Building Department permit pages cited above.[2]
Common violations
- Construction without a building permit.
- Noncompliant egress, fire separation or electrical installations.
- Parking or setback violations for converted units.
FAQ
- Can I turn my detached garage into a rental unit?
- Yes if the garage and property meet zoning, setback, parking and building-code requirements and you obtain all required permits and inspections.
- Do I need an architect or engineer?
- Licensed design professionals are typically required for structural, electrical, plumbing or substantial alterations; the Building Department specifies when sealed plans are necessary.
- What happens if I build without a permit?
- You may face stop-work orders, fines, required removal or retrofit to code and difficulty selling the property without a certificate of occupancy.
How-To
- Verify zoning and lot restrictions with the City of Miami Code and zoning maps.
- Engage a licensed architect or engineer to prepare plans that comply with the Florida Building Code.
- Submit permit applications, plans and required documents to the Building Department and pay applicable fees.
- Schedule and pass sequential inspections during construction.
- Obtain final inspection approval and the certificate of occupancy before renting or occupying the ADU.
Key Takeaways
- Start with zoning verification to avoid costly redesigns.
- Licensed plans and proper permits are central to approval.
- Unpermitted work can lead to stop-work orders and civil penalties.
Help and Support / Resources
- City of Miami Building Department - Permits & Inspections
- City of Miami Code of Ordinances (Municode)
- Florida Building Code / Florida Building Commission
- City of Miami Planning Department