Check four different sources for the median home price in Bay Harbor Islands this year and you will get four different numbers, some of them hundreds of thousands of dollars apart. That is not a data error. It is what happens when a full year of home sales in a town this size barely fills a single spreadsheet tab.
If you are shopping this market and treating any one of those numbers as the market, you are missing the more useful story unfolding on the ground: two large, verifiable development projects on Kane Concourse that are absorbing space at a pace no monthly median can capture.
Four Sources, Four Different Medians
As of May 2026, Redfin's own citywide figure for Bay Harbor Islands put the median sale price across all home types at $1,029,384, up 12.2 percent year over year.
Check a different listings platform's page for single-family houses specifically, and as of March 2026 the median sale price there was $980,000, with an average sale price of $1,351,969 and homes typically sitting on the market for 170 days. The same page, measuring across the trailing twelve months instead of a single point in time, puts the median sale price at $700,000, up 6 percent from the year before. That's a swing of roughly $280,000 depending only on which window you choose.
Narrow the search to condos, and a market report dated March 20, 2026 found 108 condos listed at a median asking price of $1,695,000, while roughly 30 condos had closed over the prior 180 days at a median closing price of $785,000.
None of these figures is wrong. Each is measuring a different property type, over a different window, using a different denominator. In a town this small, that difference is the whole story.
A Town Small Enough That the Denominator Runs Out
Bay Harbor Islands covers 0.4 square miles of land and is home to just under 6,000 residents, spread across two islands, West and East, joined to each other along Kane Concourse and linked to the mainland by the Shepard Broad Causeway. Redfin's own live listing pages for the town show roughly a dozen homes selling in a typical month across the entire market, houses and condos combined.
A dozen sales is not a large enough sample to smooth out one or two outsized transactions. A single waterfront closing north of $3 million, or a single studio resale under $300,000, can move a monthly median by a meaningful percentage in either direction. That is exactly why one page can show a median up double digits year over year while another, measuring the same town over a longer window, shows a much lower figure relative to list price. The number is not describing a trend so much as describing whichever handful of homes happened to close inside whatever window that particular page is using.
Some of the thin turnover in the town's older buildings likely traces back to Florida's statewide condo reserve and structural inspection rules, adopted after 2021 for buildings three stories and taller. Owners in a 1950s or 1960s association now facing a larger reserve requirement aren't always in a hurry to list at a discount, which can tighten resale inventory in exactly the months when more of it would make the median more reliable.
What's Actually Happening on Kane Concourse
While resale figures shift depending on which page you land on, the paper trail on new construction is cleaner, because it comes from signed leases, funded loans, and issued permits rather than a handful of scattered comps.
Two projects on Kane Concourse, the commercial corridor running through both islands, account for most of it.
One Kane Concourse, a 126,000-square-foot Class A+ waterfront office building at 9551 E. Bay Harbor Drive, is now under vertical construction with completion targeted for early 2027. Developers Taubco and Landau Properties closed on a $74 million construction loan to build it, and the building is designed around eight private yacht slips with a full-time dockmaster, giving tenants what the developers describe as dock-to-desk access from the Indian Creek Waterway.
A few blocks away, THE WELL Bay Harbor Islands at 1177 Kane Concourse received its temporary certificate of occupancy in April 2026. The building pairs 66 residences, already about 90 percent sold, with 102,000 square feet of office space that is roughly 90 percent leased to a mix of financial services firms, creative businesses, and family offices.
The Town's own Public Works Department doesn't dress this up. Its page states plainly that the town is currently experiencing a boom in private construction, and that staff are coordinating with developers to keep streets and gutters clean while the work is underway. That's a municipal department explaining, in its own words, why the streets look the way they do right now.
Why the Construction Data Is the Steadier Signal
A signed lease or a closed purchase contract on new construction tells you something a resale median can't: what buyers and tenants are willing to commit to today, at today's pricing, in buildings built to today's standards. Ninety percent leased and ninety percent sold are forward-looking commitments backed by financing and closings. A monthly or even trailing-twelve-month resale figure is a backward-looking snapshot of whatever small handful of homes happened to trade.
Read together, the two data sets aren't actually in conflict. The resale side of Bay Harbor Islands, largely 1950s through 1970s vintage condos and single-family homes mixed with newer construction, is small enough that any single window can look dramatically different from the next. The new-construction side, concentrated on Kane Concourse, is filling up at price points that require exactly the kind of financing and leasing commitments that don't happen unless the underlying demand is real.
What This Means If You're Shopping Here This Year
If a headline median is the only number guiding a decision in a market this size, you're working with too little information. A few things worth checking instead:
- Ask for sales counts and price-per-square-foot broken out by building or block, not a townwide figure that might rest on a dozen transactions.
- Compare canal-front, dry-lot, and open-bay pricing separately, and compare condos to single-family homes separately. A $785,000 median condo closing and a $1,351,969 average house sale are both true of this town at the same time, and blending them into one number erases the distinction that actually drives value.
- Watch how the remaining inventory at THE WELL moves, and later, how quickly One Kane's ground-floor space fills. Absorption on new supply is a steadier leading indicator than any single month's resale count.
- Expect construction friction near Kane Concourse through at least 2027, including tighter parking near 96th Street and heavier traffic during morning and evening commute windows as office tenants move in. That's a near-term cost tied to the same building activity that's supporting demand.
A Few Questions Worth Asking Before You Make an Offer
Why do different sites show such different median prices for Bay Harbor Islands? Because the town produces so few transactions in any given month that the property type mix and the time window you choose end up doing more work than the underlying trend. A dozen sales a month is not enough to smooth out one large or one small outlier.
Does the Kane Concourse construction directly raise home values? It's a demand signal more than a direct cause. Executives and firms choosing to lease or buy on the Concourse are drawn from the same buyer pool likely to want housing nearby, which supports the case for continued demand even when a given month's resale figures look soft.
How many homes actually trade hands here in a typical month? Based on the town's own live listing data, roughly a dozen, split between houses and condos. That's the number to hold onto before treating any single median as a verdict on the market.
Bay Harbor Islands rewards buyers and sellers who look past the headline number and into the building-by-building detail, which is exactly where a market this compact hides its real signal. If you're trying to make sense of a specific listing, a specific block, or how the current construction cycle might affect your timeline, Jennifer Brilliant has spent years tracking these blocks street by street. Let's Connect.
