Key Biscayne One Hundred
Homes for Sale in Key Biscayne, FL
All 90 homes for sale in Key Biscayne, FL · median $1,380,000 · 83 condos for sale in Key Biscayne · 144 homes for sale in 33149 · Miami-Dade County homes for sale
True comps, carrying-cost math, and listings before the portals.
As of November 2026, the MLS records 1 closed sale in Key Biscayne One Hundred in Key Biscayne, FL, the most recent in July 2026. Across Key Biscayne as a whole, 35 homes closed in the last 12 months at a median of $1,480,000, 79 median days on market, with 34 homes for sale today. At that median and Miami-Dade County's FY2025-26 rate of 17.59 mills, annual property tax runs about $26,040 ($25,320 with the full homestead exemption).
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.
Figures in this note are as of July 22, 2026. The live market numbers elsewhere on this page update nightly and are newer.
Nearby homes for sale
No active listings inside KEY BISCAYNE ONE HUNDRED right now. These are the 6 closest homes on the market, by straight-line distance from the community's center; some may sit just outside its boundary.
Listing data from the MLS feeds named on each listing page; deemed reliable but not guaranteed. Refreshed nightly.
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.
MIAMI REALTORS sales records identify 5 homes in KEY BISCAYNE ONE HUNDRED that have changed hands since 2016, built between 1973 and 1973 (median 1973), with a median living area of about 1,242 sq ft and a typical 2-bedroom, 2-bath layout; 100% are condominiums. Source: MIAMI REALTORS closed-sale history compiled by Momentum Research; counts reflect homes with a recorded MLS sale, not every home in the community.
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, 147 homes are on the market and 14% are under contract — a slower corner of Key Biscayne.
Across Miami-Dade County, 14,507 homes are active and 2,241 pending (13% under contract).
In ZIP 33149 (Key Biscayne), 35 homes closed in the last 12 months at a median of $1.48M ($939/sq ft), with a median 79 days on market. Right now 34 active and 6 pending listings put supply at about 11.7 months — a soft market. See the live ZIP 33149 housing market and the Miami-Dade County market.
ZIP and county figures describe the wider market, not Key Biscayne One Hundred specifically. Momentum Research analysis of MLS records.
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.
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.
Data sources & freshness
| Live listings | MIAMI MLS, refreshed twice daily (last: November 6, 2026) |
| Under-contract shares | MIAMI MLS records, as of 2026-11-10 |
| Historical depth | Closed-sale records back to 2026 (1 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.
Recent Developments in Key Biscayne One Hundred
Development, infrastructure, retail, and school activity affecting Key Biscayne One Hundred, tracked by our team and summarized from public reporting and official sources, with links to the original coverage. Last updated November 2026.
- October 2026Civic
Galbut withdraws three Miami Beach Live Local Act projects
Developer Russell Galbut pulled applications for projects at 1575 Alton Road (43 stories, 163 units), 740 Alton Road (28 stories, 99 units) and 880 71st St. (28 stories, 100 units). He still holds recent approvals for a 16-story tower at 663 Alton Road and a 15-story building at 1826 Collins Ave. Miami Beach has resisted the state law and is exploring ways to repeal it.
What it may mean for the marketThe withdrawals remove several planned workforce housing units from the Miami Beach pipeline and leave the three sites without announced plans. The site is about 4 miles north of Key Biscayne One Hundred.
Source: Bisnow - October 2026Market
Miami-Dade retail construction pipeline reaches 1.3M SF, highest since early 2023
Colliers data for Q3 2026 show 1.3M SF under construction across 17 developments, double the year-earlier level. Direct vacancy was 3% and triple-net asking rents hit a record $44.34 per SF. Projects include Palm Springs Square in Miami Gardens (Publix signed) and Doral Atrium, which is 95% leased with a Walmart Neighborhood Market.
What it may mean for the marketMore grocery-anchored and neighborhood retail is coming to Miami Gardens and Doral, while tight vacancy and record rents point to limited available storefront space. The site is about 3 miles northwest of Key Biscayne One Hundred.
Source: Bisnow - October 2026Development
Casa Bella Residences opens at 1400 Biscayne Boulevard in Downtown Miami
Related Group and Alta Developers completed the 56-story, 650-foot tower with 319 residences, including 10 penthouses. Closings are underway and first residents have moved in, with more than 90 percent of homes reported under contract. Construction began in November 2023.
What it may mean for the marketAdds 319 completed homes to the downtown Biscayne corridor, close to existing transit, offices and dining. The site is about 4 miles north of Key Biscayne One Hundred.
Source: Florida YIMBY - October 2026Builder Activity
Swire Properties breaks ground on Residences at Mandarin Oriental, Miami on Brickell Key
Swire Properties started construction at 500 Brickell Key Drive and 750 Claughton Island Drive on two towers, 66 stories (850 feet) and 33 stories (426 feet). The project includes 326 residences and a 121-room hotel, with Moss as general contractor and completion scheduled for 2030.
What it may mean for the marketAdds multi-year construction activity and future hotel and residential supply on Brickell Key, near the Brickell employment core. The site is about 3 miles northwest of Key Biscayne One Hundred.
Source: Florida YIMBY - October 2026Development
Crescent Heights revises workforce housing tower plans at 824 Alton Road
Revised plans call for a 39-story tower over 500 feet with 149 residences, up from 120, including 72 workforce units and 77 market-rate units. The developer is seeking height and density increases under the Live Local Act. The plan includes over 2,500 square feet of ground-floor retail and a 156-space parking podium; no approval has been reported.
What it may mean for the marketIf approved, would add workforce-priced rental supply near Miami Beach job centers and shops. The site is about 4 miles northeast of Key Biscayne One Hundred.
Source: Florida YIMBY - September 2026Civic
Miami-Dade commissioners adopt $14.26 billion budget with flat tax rate
County commissioners approved the fiscal year 2026-27 budget after a meeting that ran from Thursday afternoon into Friday morning. The operating property tax rate stays flat at 4.57 mills. The county says the plan prioritizes public safety, parks and transportation amid slowing revenue growth.
What it may mean for the marketA flat operating millage keeps the county's property tax rate steady for owners across Miami-Dade for the coming fiscal year. The site is about 4 miles northwest of Key Biscayne One Hundred.
Source: Local 10 News
Summaries reflect public reporting and official sources linked above as of the dates shown. Project details, timelines, and approvals can change. Commentary on potential market effects is general observation, not investment advice or a prediction for any specific property. For the freshest items across the whole region, see This Week in Northeast Florida.
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