A buyer’s inspector, an insurance adjuster, or a code-enforcement officer just told you your screen enclosure, pergola, or patio was never permitted. Here’s exactly what happens next, what it costs, and the fastest way out — from a Florida-licensed Professional Engineer who resolves these cases every week.
Don’t panic, and don’t ignore it. Florida law provides a standard fix: the after-the-fact (as-built) permit. A licensed PE evaluates the structure as it exists, prepares sealed as-built drawings, and the county approves it — usually without demolition. Expect engineering from $1,500 plus a county permit fee at 2–3× the normal rate. The one thing that makes it worse is waiting.
Most homeowners with an unpermitted structure didn’t build it — they bought the house that way, or hired a contractor who promised the permit was “handled.” Either way, the discovery almost always happens through one of five channels:
In a Florida real estate transaction, an unpermitted structure is negotiating leverage against you. Buyers respond one of three ways: they demand a credit that’s usually larger than the actual legalization cost, they demand you legalize it before closing (on their timeline, not yours), or they walk. Deals fall apart over a $2,500 problem because it was discovered ten days before closing instead of two months before listing.
This is the most expensive version. A hurricane damages your unpermitted screen enclosure — or the enclosure fails and takes part of your roof with it. The adjuster pulls the permit history, finds nothing, and the carrier denies the claim because the structure was never permitted or inspected. You absorb the loss on the structure and potentially on the damage it caused. In a state where hurricanes are a matter of when, not if, an unpermitted structure is an uninsured structure.
Once code enforcement opens a case, you typically receive a notice of violation with a compliance deadline. Miss it, and fines begin — in many Florida jurisdictions they accrue per day until the permit is issued and the case closes. Fines of $50–$250 per day are common, and they can be recorded as a lien against the property. A structure that could have been legalized for a few thousand dollars can generate five figures in fines through pure delay.
Florida’s remedy is the after-the-fact (as-built) permit. FBC 105.1 requires a permit before construction; when that didn’t happen, the county reviews the structure as it exists — but it needs engineering documentation to review, because there are no drawings and no inspection record. Here’s the process:
Flat-rate as-built engineering from $1,500 — sealed drawings, county submittal, and every county comment answered free until approval. Same-day proposal.
See the After-the-Fact Permit Service →Numbers vary by county and structure, but for a typical residential screen enclosure, pergola, or patio cover, plan around these ranges:
| Cost Item | Typical Range | Notes |
|---|---|---|
| PE as-built engineering | From $1,500 | Sealed as-built drawings, wind calcs, correction details, comment responses |
| County after-the-fact permit fee | $300–$1,500 | Usually 2–3× the normal permit fee, set by county ordinance |
| Corrections (if required) | $0–$1,500+ | Often just added anchors or fasteners; sometimes footing work |
| Code-enforcement fines | $0 — open-ended | The only fully avoidable line item — act before or immediately after a notice |
For most homeowners the total lands between $2,000 and $4,000 — a fraction of what the same structure costs you as a collapsed sale, a denied hurricane claim, or a fine that ran for months.
Legalization is the right answer most of the time — but not always. Demolition (with a proper demolition permit) tends to win when:
This is exactly why the PE evaluation comes first: it tells you, with numbers, whether legalization or removal is the cheaper exit — before you spend money on either path.
Two clocks make acting before June worthwhile. First, the insurance clock: an unpermitted structure is effectively uninsured in a storm, so every hurricane season you enter with it unresolved is a season of uncompensated risk — on the structure itself and on whatever it hits when it fails. Second, the workload clock: after a major storm, Florida building departments and engineers are buried in repair permits, and review times stretch from weeks to months. The same after-the-fact permit that clears in five weeks in March can take a full quarter in October after a landfall.
Tell your engineer immediately — sale-driven cases can be prioritized, and showing the buyer an active after-the-fact permit application with sealed engineering is often enough to keep the transaction alive while the county completes its review.
The most common triggers are a home sale or refinance, an insurance claim or renewal review, a neighbor complaint, and county aerial imagery — many Florida counties compare aerial photos year over year and flag new structures with no matching permit automatically.
Nothing — until it surfaces. Then it can kill a home sale, void a hurricane insurance claim, and generate code-enforcement fines that accrue daily in many jurisdictions. The legalization cost never goes down by waiting; the fines and penalty fees only go up.
Plan on engineering from $1,500, plus the county after-the-fact fee at 2–3× the normal permit fee, plus any corrections the structure needs. Most residential cases total roughly $2,000–$4,000.
Sometimes — when the structure is badly deteriorated, can’t meet wind loads, or violates setbacks that can’t be varied. A PE evaluation tells you which path is cheaper before you commit to either.
In many Florida counties an owner-occupant can apply as an owner-builder for an existing structure on their homestead. You still need PE-sealed as-built drawings for the application; a licensed contractor may be required only if corrections involve new construction work.
Tell us your county and send a few photos of the structure. You’ll hear directly from the Florida PE who seals every drawing — with a flat-rate proposal and an honest read on legalize vs. remove.
Start Your After-the-Fact Permit →A one-page PE-built checklist: every document your county needs and the 5 reasons permits get rejected. Enter your email for instant access to the PDF.