You signed the lease, planned the build-out, and are counting the days to opening. Then someone mentions the certificate of occupancy — and the phrase “change of use.” These two concepts decide whether your business can legally open, and they surprise more first-time commercial tenants than any other part of the permit process. Here is what they mean in Miami-Dade, Broward, and Palm Beach, and how to plan around them.
The Certificate of Occupancy (CO) and Its Cousins
A certificate of occupancy certifies that a building or space complies with codes for its approved use and is safe to occupy. New buildings and significant renovations receive a CO after final inspections; smaller tenant improvements often receive a certificate of completion (CC) instead. Separately, many South Florida municipalities issue a certificate of use (CU) or business tax receipt tied to the specific business at a specific address — renewed annually, and required to operate. Which documents apply depends on the jurisdiction and the scope, but the principle is constant: passing inspections is not the same as being cleared to open.
What “Change of Use” Triggers
Buildings are approved for occupancy classifications — business, mercantile, assembly, industrial, and more. When your intended business falls in a different classification than the previous tenant (retail to restaurant, office to medical clinic, warehouse to gym or event space), the space must be brought up to the code requirements of the new use. That can mean accessibility upgrades, additional restrooms, fire alarm and sprinkler requirements, egress changes, parking recalculations, and mechanical ventilation upgrades. Change of use is the single biggest cost multiplier in commercial build-outs, and it is decided by what the space was, not what it looks like.
Due Diligence Before Signing
The smartest move happens before the lease: request the space’s existing CO or occupancy history, confirm zoning permits your use at that address, and get a preliminary assessment of what a change of use would require. Landlords sometimes market space by what it could become rather than what it is approved for; the permit history tells the truth. A pre-lease review is the cheapest insurance in commercial real estate.
The Process
Change-of-use projects run through full plan review across disciplines, with fire review typically its own track. Inspections follow construction, and the CO or CC issues when everything passes. Then the business-level documents — certificate of use, business tax receipt, and any industry licenses (health department for food, state boards for medical) — close the loop. Opening day depends on the last of these, not the first.
Where It Goes Wrong
Signing a lease with rent starting before the permit reality is known; assuming a like-kind use when the classification differs; building out first and discovering the accessibility upgrade after; and treating the CO as an afterthought scheduled the week of opening. Each is fixable with lead time and expensive without it.
Need the paperwork handled right the first time? IG Permit Expeditors prepares, submits, and tracks permits across Miami-Dade, Broward, and Palm Beach. Request a quote through our website or email info@igpermitexpeditors.com.