Key Biscayne One Hundred
Homes for Sale in Key Biscayne, FL
True comps, carrying-cost math, and listings before the portals.
Photo via MIAMI MLS
As of September 2026, Key Biscayne One Hundred in Key Biscayne, FL has 1 home for sale. As of September 2026, the MLS records 17 closed sales in Key Biscayne One Hundred in Key Biscayne, FL since 2018, the most recent in July 2026.
There is no closing activity recorded for KEY BISCAYNE ONE HUNDRED in the current window, and MLS listings do not identify a defined set of community amenities. That is not a knock on the address — it means the data set we would normally use to talk price, pace, and positioning simply is not there right now.
For a buyer or seller, that changes the approach. You cannot lean on a median or a days-on-market figure that does not exist. You lean on direct comps pulled from adjacent inventory, on agent-to-agent conversations, and on a realistic read of what similar product nearby is actually doing. That is a research problem, not a reason to avoid the community — but it does mean going in with an agent who will do that legwork rather than hand you a number.
The 60-Second Overview
KEY BISCAYNE ONE HUNDRED shows zero recorded closings in the current MLS window and no community amenities identified from active listings, which puts it outside the range of communities we can currently size up with hard transaction data.
Pre-construction details are compiled from public records, builder announcements and builder listings, and are subject to change without notice; figures are deemed reliable but not guaranteed. Momentum Research figures are our own analysis. This page describes homes, pricing and community attributes, not residents.
Who Key Biscayne One Hundred is best for.
Best for
- Buyers comfortable relying on direct, agent-sourced comps rather than a published median
- Sellers willing to have their agent build a custom pricing case from adjacent inventory
- Anyone treating this address as a longer-timeline decision rather than a fast close
Probably not for
- Buyers who need a confirmed price history before writing an offer
- Sellers expecting to lean on recent local closings to set a list price
- Anyone shopping specifically for a documented amenity package
The market around Key Biscayne One Hundred
Key Biscayne One Hundred is too small for its own price trend, so here is the market around it.
In ZIP 33149, 158 homes are on the market and 15% are under contract — a slower corner of Key Biscayne.
Across Miami-Dade County, 15,109 homes are active and 3,290 pending (18% under contract).
ZIP and county figures describe the wider market, not Key Biscayne One Hundred specifically. Momentum Research analysis of MLS records.
The real cost & risk here
Before the list price, the Florida math the portals skip. These are Miami-Dade County typicals — your exact home, flood zone, and insurance quote will vary, so verify each before you offer.
Check it for your address: look up your flood zone (FEMA) · insurance by county · true-cost calculator · Miami-Dade County scorecard.
County typicals from Momentum’s Florida housing data (Zillow & Realtor.com aggregates, Census, FRED), updated monthly; insurance modeled. Flood zone is property-specific — always confirm via FEMA.
15% of homes for sale in ZIP 33149 are already under contract (under contract ÷ under contract + active listings) — a read on how much of the available inventory buyers have already claimed. Source: MLS data (2026-09-12).
KEY BISCAYNE ONE HUNDRED Market Scorecard
KEY BISCAYNE ONE HUNDRED is currently a thin data market. Limited supply, a median asking price of $645,000, and homes go under contract in about 171 days.
Typical home value in the 33149 ZIP is $1,692,135, about 97.2% above the Florida norm (Zillow Home Value Index).
Go deeper: ZIP market scorecard · county scorecard · true cost calculator · affordability calculator.
Live data: realMLS, refreshed twice daily. Typical value: Zillow Research. Market metrics only; these describe homes for sale and recent sales, not residents.
Homes For Sale Right Now in Key Biscayne One Hundred
Live MLS inventory for Key Biscayne One Hundred. Every active listing, what is under contract right now, and the last 12 months of closed sales, refreshed twice a day. Closed comps beat an algorithm's guess every time.
Active and pending Key Biscayne One Hundred listings as of 2026-09-12, priced high to low. Based on information from the Southeast Florida Multiple Listing Service (SEFMLS) or from MIAMI Association of REALTORS(R) for the period 2018 through 2026. Tap any home to ask about it.
The Key Biscayne One Hundred buying strategy.
If we were buying in Key Biscayne One Hundred today, this is the order of operations we would run for our clients.
Underwrite the condition first. Price the roof, HVAC, and systems honestly before judging any list price; condition swings value here more than square footage alone.
Match the home to real comps. Recent sales of similar condition and lot, not the asking price, tell you what a home is worth.
Move deliberately, not desperately. Neither side has a decisive edge, so a well-prepared, fairly-priced offer wins without overpaying.
Line up financing and inspection early. A pre-approval and an inspection plan let you act fast and negotiate from evidence.
Keep an agent in your corner. The listing agent works for the seller; we represent you and prepare a hand-built valuation before any offer in Key Biscayne One Hundred.
When the data set is the story
A community with no closings in the tracked window is either extremely thin on turnover, extremely tightly held, or simply underrepresented in current MLS activity relative to its actual footprint. We cannot tell you which from this snapshot alone, and we would rather say that plainly than manufacture a median or a pace figure that is not supported.
The absence of a listed amenity set works the same way. It does not mean there is nothing there — it means the active listings pulled into this snapshot did not carry that detail. Anyone evaluating this address should treat the MLS snapshot as a starting point, not the full picture, and expect to do some direct diligence before drawing conclusions about value or fit.
The location and the amenities are priced into every listing in Key Biscayne One Hundred. The deal is won or lost on condition, the comps, and the renovation math.
Why work with Momentum here
In a community with no recent closings to anchor a conversation, the value an agent adds is almost entirely in legwork: pulling the right adjacent comps, talking to agents who have worked the address directly, and being straight with you about what we do and do not know before you make an offer or set a list price.
Key Biscayne One Hundred in 15 seconds.
HOA, CDD & Fees
- HOA status not on record. Verify any dues before you offer
- Any club/amenity membership is billed separately
Confirm the current HOA dues, exactly what they cover, and any CDD bond or special assessment for a specific address before you offer.
Tools for a Key Biscayne One Hundred buy.
Free calculators to pressure-test the real cost before you tour.
Selling here is won on condition and pricing to real comps, not an automated estimate. The right number comes from closed Key Biscayne One Hundred sales matched to your home.
Price it to the comps and condition, not an automated estimate.
If you are thinking about selling in Key Biscayne One Hundred, the right list price comes from recent comparable sales matched to your home's condition and location, not an automated estimate.
What is your Key Biscayne One Hundred home worth?
Get a no-obligation home value based on real comparable sales in Key Biscayne One Hundred, not an automated guess. Tell us about your home and we will personally prepare your numbers and a pricing strategy. No obligation, no spam.
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Should you buy in Key Biscayne One Hundred?
An honest fit check. We will tell you when it is not your community.
Nearby Communities
Explore more neighborhoods near Key Biscayne One Hundred with Momentum Realty’s local guides.
Data sources & freshness
| Live listings | MIAMI MLS, refreshed twice daily (last: September 12, 2026) |
| Under-contract shares | MIAMI MLS records, as of 2026-09-08 |
| Historical depth | Closed-sale records back to 2018 (17 transactions analyzed) |
Verify the primary sources yourself: Florida DOR · U.S. Census · FEMA flood maps · Citizens Property Insurance.
Momentum Research figures are our own analysis of MIAMI MLS records; MLS data is deemed reliable but not guaranteed. Methodology: how Momentum market scores are computed. Market metrics describe homes for sale and recent sales, not residents.
Own a home here?
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The numbers on this page move markets in the aggregate. The number that matters to you is what a buyer pays for your address. Momentum sells for 1.25% above the MIAMI MLS member average and 8 days faster, and we’ll price yours against live local comps.
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