Direct answer
In unincorporated Miami-Dade, a garage conversion requires a master building permit. The County lists garage conversions with additions, remodeling, and layout changes. After the master permit, the job may also need electrical, mechanical, plumbing, and window permits. Zoning rules for the property’s district still apply. If the converted space will be a separate living unit, the County’s accessory dwelling unit rules apply too. If the property is in a city, that city’s building and zoning offices handle it.
Disclaimer
This article is general information about permitting and code-enforcement processes. It is not legal advice, not a substitute for advice from a Florida-licensed attorney, and not a guarantee of any result, timeline, or fee. Permit Busters, LLC is not a law firm and does not appear as your legal representative. Building and code rules vary by county and municipality and can change. Confirm current requirements, forms, and fees with the building or code office that has jurisdiction over the property, and consult a Florida attorney and, where construction work is required, a Florida-licensed contractor.
Este artículo es información general sobre procesos de permisos y cumplimiento del código. No es asesoramiento legal, no sustituye el consejo de un abogado con licencia en Florida y no garantiza un resultado, un plazo ni un costo. Permit Busters, LLC no es un bufete de abogados y no comparece como su representante legal. Las normas de construcción y de código varían según el condado y el municipio y pueden cambiar. Confirme los requisitos, formularios y tarifas vigentes con la oficina de construcción o de código que tenga jurisdicción sobre la propiedad, y consulte a un abogado de Florida y, cuando se requiera obra, a un contratista con licencia en Florida.
Which office handles it
Miami-Dade County handles buildings in unincorporated areas, where folio numbers begin with 30. A property in a city, such as Hialeah, Miami, or Doral, goes to that city’s building department. See Which Department Issues Your South Florida Permit.
The permits a conversion usually involves
Miami-Dade’s “Other Permits” page says new construction, remodeling, renovations, additions, garage conversions, layout or structural changes, and repairs require a master permit. It adds that, following the master permit, you may also need subsidiary electrical, mechanical, plumbing or gas, roofing, and window permits.
A typical conversion touches several of these. Filling the garage door opening changes the wall. New windows or doors, new circuits, A/C to the new room, and any bathroom or kitchen plumbing each fall under a trade. If signed and sealed plans are required, they must be prepared by a Florida-licensed engineer or architect. Permit Busters, LLC can help coordinate that step.
Zoning: garage, living space, or a separate unit
Building code approval and zoning approval are different questions. The County’s RU-1 single-family zoning district page lists private garages among the customary uses, along with setback rules and a note to check the County Code for full restrictions. Ask County Zoning how a conversion affects your property’s district requirements before you design it.
What the converted space will be used for matters:
- Extra room for the main house. This is a remodel or alteration of the existing home.
- Accessory dwelling unit (ADU). Miami-Dade defines an ADU as attached or detached space with its own kitchen, bathroom, and sleeping area, intended for use by a separate family. The County allows converting a portion of an existing single-family home into an ADU, with conditions. These include zoning district and lot size limits, a size range, parking limits, administrative site plan review, HOA notification where there is an association, and a renewable Certificate of Use.
- Guesthouse. The County treats a guesthouse as a different use. It may not be rented, and occupancy is limited to the family that lives in the main house.
Inspections and the final certificate
The permit card lists the required inspections for the master permit and each trade permit. Miami-Dade issues a Certificate of Occupancy for remodeling, renovation, additions, and changes of use once finals are approved and completion holds are cleared.
If the garage was already converted without a permit
Unpermitted garage conversions are a common finding in home sales. Miami-Dade’s Regulation Cases search shows building code enforcement cases in unincorporated areas, including work without a permit. The County’s homeowner FAQ says that if a Notice of Violation has been issued for work done without a permit, the permit is subject to a “double fee” penalty. See How to Legalize Unpermitted Work in South Florida and Selling a Florida Home With Open or Expired Permits.
Get help with a Miami-Dade garage conversion permit
Permit Busters, LLC can help you confirm the jurisdiction, coordinate plans with a licensed design professional, and prepare the master and trade permit applications. See residential permits, after-the-fact permit services, and the Miami-Dade permit help page. Approval always rests with the city or county. Call (954) 616-5823, email info@permitbusters.com, or book an appointment. Hours are Monday through Friday, 9 AM to 5 PM. Permit Busters, LLC is based in Lauderhill, FL 33351.
FAQ
Do I need a permit to convert my garage in Miami-Dade?
Yes. Miami-Dade lists garage conversions among projects that require a master building permit, and subsidiary electrical, mechanical, plumbing, and window permits may follow. In a city, ask that city’s building department.
Can I turn my garage into a rental unit in Miami-Dade?
Possibly, if it qualifies as an accessory dwelling unit. In unincorporated Miami-Dade, ADU rules include zoning district and lot size limits, a size range, parking limits, site plan review, and a renewable Certificate of Use. Cities have their own rules.
Is a guesthouse the same as an accessory dwelling unit?
No. Miami-Dade says a guesthouse may not be rented and is limited to the family that lives in the main house, while an ADU may be used by a separate family.
Do I need plans for a garage conversion?
Usually. If signed and sealed plans are required, they must be prepared by a Florida-licensed engineer or architect. The building department decides what the permit needs.
What if my garage was converted without a permit?
Ask the building department about an after-the-fact permit, and check whether a code case is open. Miami-Dade says a permit applied for after a Notice of Violation for work without a permit is subject to a double fee penalty. This is general information, not legal advice.