What is a milestone inspection and does my building need one?
Reviewed by the OurHOA team · Updated July 2026
A milestone inspection is a structural safety check on older multi-story condo buildings. Who has to get one, what Phase 1 and Phase 2 mean, and what it costs owners.
It is a structural exam, not a home inspection
A milestone inspection looks at whether a building is still holding itself up. An engineer or architect examines the load-bearing parts - foundation, columns, beams, slabs, balcony and walkway supports, the waterproofing that keeps water out of all of it - and issues a written opinion on the building's structural condition. It is not the walkthrough you paid for when you bought your unit, which mostly concerned itself with the water heater and whether the outlets were grounded. Nobody is checking your dishwasher. The question being asked is narrower and more serious: is anything in this structure deteriorating in a way that threatens it.
Where these are actually required
This is not a nationwide requirement, and most single-family HOAs are not touched by it at all. Florida created the best-known version after the Champlain Towers South collapse in Surfside. Under Florida Statutes section 553.899, condominium and cooperative buildings that are three or more habitable stories tall must have a milestone inspection once the building turns 30 years old, measured from the certificate of occupancy, and then every 10 years after that. The local building department can move that to 25 years where local conditions justify it, such as proximity to salt water, which is why two buildings the same age in different counties can be on different clocks. A handful of other states have gone down similar roads at different speeds. New Jersey's structural integrity law took effect in January 2024 and reaches condominiums and co-ops with certain structural components. If you are not in a state with a statute, your building may still face something similar through a local ordinance, your lender, or your insurer.
Phase 1, and the phase nobody wants
The inspection happens in two stages, and the difference between them is the whole story. Phase 1 is visual. The professional walks the building, looks at the structural elements, and either signs off or does not. If nothing suggests substantial structural deterioration, that is the end of it until the next cycle. Phase 2 is triggered only when Phase 1 finds signs of substantial structural deterioration, and it goes further: testing, sometimes destructive, to find out how bad the problem is and what it will take to fix. In Florida, once a Phase 2 report is filed, repairs generally have to begin within 365 days of the local enforcement agency receiving it. That deadline is the part that turns an engineering report into a budget crisis, because the association no longer gets to decide when to do the work.
What owners are entitled to see
Owners often hear about a milestone inspection through rumor before they ever see paper, which is backwards. In Florida the association has 45 days from receiving the report to send every owner a copy of the inspector-prepared summary, post the summary conspicuously on the property, and publish both the summary and the full report on the association website if the association is required to have one. If you own in a covered building and you have not seen a summary, ask for it in writing and reference the statute. And ask for the full report, not just the summary - the summary tells you the conclusion, while the report tells you what the engineer actually saw and how confident they were about it.
The reserve study is the other half
Florida pairs the milestone inspection with a structural integrity reserve study, or SIRS, and the two answer different questions. The inspection asks whether the building is sound today. The SIRS asks how much money the association needs to have saved for the things that will fail tomorrow, covering items including the roof, load-bearing walls, floor, foundation, fire protection, plumbing, electrical, waterproofing and exterior painting, and windows and exterior doors. Covered buildings need one at least every 10 years, and Florida has largely taken away the ability of owners to vote to waive or underfund those structural reserves. That is a real change in how these communities work. For decades, boards kept dues down by voting reserves away year after year, and the bill came due all at once. See our guides on what a reserve study is and who pays when an HOA underfunds its reserves.
What this means for your money
Say your building is a 34-year-old, four-story oceanfront condo with 48 units and reserves that have been waived since 2016. The Phase 1 inspection finds corroded rebar in the walkway slabs, Phase 2 confirms it, and the repair bid comes in at $1.4 million. Split evenly, that is roughly $29,000 per unit, on a clock the board did not set. This is why milestone inspections have driven special assessments, insurance premium jumps, and a wave of older-building sales in Florida. If you are buying, ask for the milestone inspection report, the SIRS, and the last two years of board minutes before you go firm, and treat a building that is close to its trigger age with no completed study as an unpriced liability. Our guides on HOA red flags to watch for before buying a home and how to fight or challenge a special assessment cover the rest of that ground.
What a board should do about it now
Find your certificate of occupancy date and count. If your building is within a few years of the trigger, start getting engineer proposals early, because the supply of qualified firms in states with deadlines has been thin and prices reflect that. Get the inspection and the reserve study quoted together where the law allows it, since the same site work can feed both and you avoid paying twice for the same access. Then tell owners what is coming before the report lands rather than after, because a community that has been warned about a possible assessment behaves very differently from one that is ambushed by it. Keeping the inspection reports, reserve studies, engineer correspondence, and board minutes in one place where every owner can find them is exactly the kind of unglamorous record-keeping OurHOA is built for. None of this is legal or engineering advice, and requirements change quickly in this area, so confirm what applies to your building with your association attorney and a licensed engineer in your state.
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These guides are general education for HOA boards and residents, not legal, tax, or financial advice. Rules vary by state and by your community's governing documents - check with a professional for your situation.