Faster than most owners think in some places, slower in others. Here's a realistic timeline from first iguana to structural repair, and where the tipping points are.
One of the most common things I hear on a free walk is some version of 'they only showed up last year — surely it can't be that bad yet.' Sometimes that's true. Often it isn't, because iguanas do some kinds of damage almost immediately and others over a couple of seasons, and owners tend to only notice the slow structural kind once it's expensive.
So here's a realistic timeline for a Palm Beach County property, from the first iguana on the dock to the repair bill, with the tipping points where a manageable problem turns into a costly one.
Days to weeks — the fast damage
Some damage is immediate. A single iguana can foul a pool deck or lanai in a day and chew ornamental plants down within a week or two.
- Droppings on the deck, dock, and pool cage — a same-day problem and a hygiene concern.
- Grazed hibiscus, bougainvillea, orchids, and fresh sod — visible within days.
- Torn screen if an animal climbs the cage or drops into it.
Weeks to months — burrows begin
Once an iguana settles, the burrowing starts, and this is where the clock on the expensive damage begins. A nesting burrow can go in over a spring, and it becomes a den that gets reused and extended through the year. The soil behind a seawall or under a slab starts moving before there's anything visible on the surface.
This is the stage owners miss entirely, because nothing looks wrong yet. The damage is real and accumulating; it just hasn't surfaced.
A season or two — the structural tipping point
Over one to two nesting seasons, an established colony can turn a sound seawall into a slumping one or void out enough fill under a slab to crack it. This is the tipping point — the moment the problem stops being a removal job and becomes a removal job plus a marine or concrete contractor. West Palm's dam damage is the outsized version of the same timeline: burrows undermining a structure over time until it's a serious repair.
The speed here depends heavily on the property. A soft canal or lake bank fails faster than a well-built inland slab. Waterfront accelerates everything.
What speeds it up
A few factors compress the timeline and push a property to the tipping point faster.
- Waterfront — soft banks and an instant water escape mean more animals digging more.
- A neighbor's neglected seawall constantly feeding new iguanas down the waterline.
- Spring nesting undisturbed — one female's clutch is next year's colony.
- Old walls and thin slabs that were already near the edge of their service life.
Why acting early is the whole game
The timeline is the argument. Caught in the days-to-weeks window, it's a clear-out and some prevention — the property never reaches the structural stage. Caught after a season or two, it's the same removal plus a repair that runs well into the thousands. That's why I quote control against the repair it prevents. Single visits from $125 and programs from $99/mo are cheap insurance against a tipping point you can't easily walk back.
Questions we hear
How quickly can iguanas start damaging my property?
Some damage is nearly immediate — a single iguana can foul a pool deck in a day and graze ornamentals within a week or two. The expensive structural damage from burrowing takes longer, usually a season or two to reach the point of seawall or slab failure.
They only showed up recently — is it too soon to worry?
Not necessarily. The visible mess starts fast, but the burrowing that undermines a seawall or slab begins within weeks of them settling, long before anything looks wrong on the surface. Catching it in that quiet window is far cheaper than waiting for the crack.
What makes the damage happen faster?
Waterfront above all — soft banks and an instant water escape mean more digging. A neighbor's neglected seawall feeding new animals, undisturbed spring nesting, and already-aging walls or slabs all compress the timeline to the structural tipping point.
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