Permits, engineers, and licences for structural work in Miami

Structural repair sits in a more regulated space than most residential work, and in Miami-Dade the layers stack up: the state building code, state licensing statutes, county code provisions, and then whichever of the county's 34 municipalities the property happens to be in. Knowing the shape of it makes a quote much easier to read.

The code that applies

Florida runs one statewide building code. The version in force is the 8th Edition of the Florida Building Code, dated 2023 and effective from the last day of that year. Miami-Dade and Broward are the two counties inside the High-Velocity Hurricane Zone, which carries stricter requirements than the rest of the state for wind resistance and for approval of the products used. A detail designed and approved for Orlando is not automatically permittable here.

Which building department

Miami-Dade County has 34 incorporated municipalities, each administering its own building department, plus the county building department covering unincorporated areas. If your property is in Coral Gables, the permit goes to Coral Gables. If it is in Kendall, which is unincorporated, it goes to the county. Fee schedules, review times, and inspection scheduling differ between them, and it is worth establishing which applies before assuming anything about timing.

Sealed drawings

Structural repair is designed work. The submittal for a permit is based on drawings prepared and sealed by a licensed design professional, and Miami-Dade's published permitting procedures state plainly that plans submitted through the submission portal must be digitally signed and sealed.

From an owner's perspective this is a protection rather than an obstacle. The engineer determines the repair, the method, the pier count, the depths, the capacities, and those numbers are the largest cost item on the job. Having them set by someone who does not sell the piers is a reasonable use of a fee. The engineering typically runs $1,500 to $4,000 on residential work.

The Special Building Inspector, which is specific to this county

Section 8-22 of the Code of Miami-Dade County requires that certain operations be inspected and supervised by a Special Building Inspector, defined as a Florida registered architect or professional engineer retained by the owner. Two of the listed operations matter directly here:

• the compaction of fill under slabs on grade;
• the installation of structural piles.

Between them, those cover most of what underpinning consists of, and both address work that is invisible once it is finished. If you are wondering whether an independent professional needs to be watching while piers go in on a Miami-Dade property, this is the provision that answers it.

What permits cost

For unincorporated Miami-Dade, the county's published fee schedule, Implementing Order 4-63, effective 30 June 2025, sets out:

• a minimum building permit fee of $147.00;
• alterations or repairs to a single-family residence or duplex at $0.070 per $1.00 of estimated cost, with a $25.88 minimum and an $847.95 maximum;
• $92.48 for an additional inspection beyond the initial inspection and one follow-up;
• $133.24 for a rework plan review;
• a 100 percent additional fee where work started before the permit was issued.

Municipalities publish their own schedules, so treat these as the county baseline rather than as universal figures.

Contractor licensing

Florida has no dedicated foundation or structural contractor licence. Under Florida Statutes section 489.105, the relevant certified categories are:

• General contractor: unlimited as to the type of work, with no story limit.
• Building contractor: commercial and residential buildings not exceeding three stories, with remodeling and repair work limited to that which does not affect structural members.
• Residential contractor: one-, two-, or three-family residences not exceeding two habitable stories above no more than one uninhabitable story.

Two further distinctions are worth knowing. First, under section 489.117, a state certification is valid statewide, whereas a state registration allows contracting only in the counties or municipalities where the holder has met local licensing requirements. Second, Miami-Dade operates its own Construction Trades Qualifying Board under Chapter 10 of the county code, with its own local licence categories, and state-certified contractors may register with the county voluntarily to streamline permitting in the unincorporated area.

Local specialty licence categories in Florida became subject to state preemption from 1 July 2025, and Miami-Dade has published the list of categories it can no longer issue locally. The practical effect for an owner is minor, but it is a reason not to rely on an old article describing a county specialty licence that no longer exists.

How to read all this on a quote

A quote for structural work in Miami-Dade should make clear who prepares and seals the drawings, who applies for the permit and in which jurisdiction, whether a Special Building Inspector is engaged and by whom, what inspections are included, and what happens to the price if the building department asks for a revision. None of that is unusual to ask for, and a quote that already contains it is a quote written by someone who has done this here before.

The cost side of these items is set out in the Miami cost guide.

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