What the Record Can and Cannot Say
Start with what a sale record can honestly answer. A closing carries a price, a size, a year built and a waterfront tag. It carries no line item for impact glass, a sealed roof deck or a whole-house generator. So nobody can honestly tell you that hardening adds some tidy percentage to a sale price. A house built under the current code is also newer, larger and finished this decade, and those premiums travel together in the price.
What the year built does carry is the building code the house went up under. Florida rewrote its code after Hurricane Andrew, and that history splits the housing stock into eras a buyer can actually use. Sort five years of closings by those eras and clear patterns hold up year after year.
One more limit belongs up front. An owner can retrofit a 1970s house down to the last opening, and the year built will never show it. The comparison below is stock against stock, not window against window. The retrofit story lives in the permit file, and the last section shows how to read it.
Three Building Codes, One Coastline
Hurricane Andrew crossed southern Miami-Dade County in August 1992 and broke the assumption that the existing code was strong enough. Reviews after the storm found construction and enforcement had drifted for years.
Miami-Dade answered first. By 1994 its code required windows and doors to survive impact testing, the large-missile standard that still carries the county's name. A product had to pass the test before it could be installed.
The statewide change came in March 2002, when the first Florida Building Code took effect. Coastal Palm Beach County sits in its wind-borne debris region, so new homes here have been permitted with protected openings and stronger structural rules ever since. The code tightens on a three-year cycle, and the edition that arrived in 2012 brought the current generation of wind maps.
Our shoreline now holds three kinds of houses. In the five measured years, 459 of the waterfront closings were homes built before 1994, and 301 came from the transition years between. The largest group, 915 closings, was built under the statewide code. The strip below puts the milestones and the stock on one line.
- Built before 1994. Permitted under the old codes, 459 closings in this study.
- Built 1994 to 2001. The post-Andrew transition, 301 closings.
- Built 2002 or later. The statewide-code era, 915 closings.
Code milestones follow Florida's published building code history. Era counts are this study's closed waterfront house sales of $3M and up, 2021 through 2025.
Half the Market Is Already New Code
What stands out first is how steady the mix already is. In every one of the five years, homes built under the 2002 code carried between 52 and 59 percent of all waterfront closings at this level. Homes from before 1994 held roughly another quarter. The share barely moves, which means the rebuild is not a wave passing through but the market's settled shape.
The concentration sharpens at the top. Above ten million dollars the window recorded 318 closings, and 206 of them were homes built under the statewide code. The buyers spending the most overwhelmingly bought the newest construction, either standing or built for them.
Some of that is the production line itself. Of the measured closings, 211 sold within a year of their build date, effectively new homes changing hands at delivery. Our study of the county's spec, custom and rebuild market walks that pipeline, and our guide to buying new construction covers the contract side. The live waterfront listings show the same mix in the current inventory.
- One dot per year, the share of closings built 2002 or later.
- Dashed line, half of all closings.
Basis: closed single family waterfront sales of $3M and up across the twelve tracked coastal markets. Share uses the year built on each record.
Hurricane Hardening and Home Value on the Record
The money question comes next, and the headline totals run the way most buyers expect. The median new-code closing came in at $5.57M on a median 6,076 square feet. The median pre-1994 closing was $4.25M on 4,268 square feet. Bigger, newer houses took bigger checks, and the code year is only one strand of that bundle.
Divide by size and the order flips. Across the whole set, homes built before 1994 carried the highest median price per square foot, about $1,110 against $969 for the new-code group. The reversal survives every position cut we ran. Ocean front, Intracoastal, canal and lake stock all show the oldest homes highest per foot, and the chart below holds the four comparisons with their sale counts.
Read that as a warning about per-foot math rather than a verdict against modern construction. The transition-era homes of 1994 to 2001 sit lowest in most cuts, priced as neither prime land nor current product. The next section explains what is actually being paid for.
- Open circle, the per-foot median for homes built before 1994.
- Filled square, the per-foot median for homes built 2002 or later.
- Sale counts per class run beneath each label on the wide render.
Closed MLS waterfront house sales of $3M and up, 2021 through 2025. Medians blend land and structure value, so an older home on prime water reads high per foot. The code year is one premium among several.
Medians of recorded closings with each row's sale count beside it. The last two rows split the statewide-code era. Per-foot medians use recorded living area
Why the Oldest Homes Sell for the Most Per Foot
The explanation sits under the house. On this coastline the land holds most of the value, and an old house on great water often trades close to the value of its site. Our decomposition study showed the land doing the work of appreciation while the structure ages against it. Divide a land-driven price by a small 1970s floor plan and the result is a very high figure per foot. The number is real, and it measures the lot more than the house.
Jupiter Island runs the extreme version, where old houses out-price new ones because the next owner plans to remove them. The same logic runs at lower volume through every prime pocket in this study. A buyer who pays that way is best understood as buying land plus permission to build under the current code.
None of this says an older home cannot compete. A retrofitted house with documented work can stand next to new stock, and our waterfront renovation guide covers which projects the Jupiter market actually rewards. What the record cannot do is isolate hardening on its own, so we stop where it stops.
The Paper Trail That Proves a Hardened House
A hardened house proves itself on paper, not in listing photos. The permit history and the appraiser's card are public, and reading them is part of how we prepare buyers before an offer is written.
Four documents answer most of it. The permit file dates the roof, the openings and any generator work. A wind mitigation inspection reports the roof shape, the deck attachment and the opening protection in a standard format. Product approval numbers tie each window and door to its tested rating. An elevation certificate places the finished floor against the flood maps. The table shows where each answer lives.
What those features mean for any one insurance quote is a conversation between buyer and carrier. Our waterfront insurance and risk playbook maps the questions worth asking there. On the water itself, seawalls and docks carry their own file, and our guide to buying waterfront property in Jupiter walks that side of the purchase in detail.
When you are ready to compare actual homes, the waterfront listings hold the current inventory and the full property search covers the rest of the county.
Availability varies by property and by the age of the permit history. Every source named here is a public record or a standard inspection product
Bottom Line
The coastline has spent twenty years replacing itself, and the record shows buyers funding that work at every level, most heavily at the top. Per-foot comparisons flatter the oldest stock because the land beneath it sets the price. A modern house sells as a house. An old house on prime water often sells as a site, whatever the listing says about the kitchen. Both can be sound purchases. The paperwork is what tells you which one you are actually making.
For a buyer weighing an older waterfront house against new code: Ask for the permit file and the wind mitigation report before you write the offer. Together they tell you whether you are buying the house or the site beneath it.
The dataset holds closed single family sales of three million dollars and up, tagged waterfront in the MLS, closed between January 2021 and December 2025. The records come from our standing BeachesMLS town pulls across twelve coastal markets. Boca Raton, Delray Beach, Highland Beach and Manalapan anchor the south. Palm Beach, West Palm Beach, Singer Island and Juno Beach hold the middle. North Palm Beach, Palm Beach Gardens, Jupiter and Tequesta close the north. Cross-listed duplicates were removed by listing id and by matching address, close date and close price. The final count is 1,677 closings, and 1,675 of them carry a year built.
Eras follow the year built on each record. Homes built before 1994 predate the post-Andrew standards. Homes from 1994 through 2001 rose in the transition years. Homes from 2002 on were permitted under the statewide Florida Building Code. Year built is a proxy for the permit date, so a house finished near a boundary year can straddle it. Retrofits are invisible to this cut, and a fully hardened older home reads here as old stock.
Medians are shown with their sale counts, and per-foot figures use recorded living area. Jupiter Island is excluded because our island pull begins in mid 2023 and a large share of island sales closes off the MLS entirely. Two closings without a year built sit outside the era figures. Condominiums are a different product and appear nowhere in these numbers. This is market data and public record analysis, not investment, insurance or engineering advice.
BeachesMLS closed sales via the firm's town-level pulls, January 2021 through December 2025.
Florida Building Code chronology from the state's published code editions, including the March 2002 effective date.
Miami-Dade County impact-testing standards adopted after Hurricane Andrew, public record.
