FONTAINE LAKE
Homes for Sale in Plantation Key, FL
True comps, carrying-cost math, and listings before the portals.
Fontaine Lake sits in Plantation Key, Monroe County — the Florida Keys — where real estate is priced by water access, lot configuration, and the sheer scarcity of buildable land rather than by square footage alone. A median near $1.49 million reflects that reality: this is not a price point driven by finishes or floor plans but by geography that cannot be replicated.
With a median days-on-market of roughly 80 days and only four closings in the measurement window, this is a thin, deliberate market. Buyers are not rushing, and sellers who misprice get reminded of that patience quickly. The low transaction volume also means any single closing can swing the median meaningfully, so treat the figure as directional rather than as a precise ceiling or floor.
The 60-Second Overview
FONTAINE LAKE market snapshot (as of July 27, 2026): the median sale price is about $1.49M, and a median 80 days on market for closed sales.
Fontaine Lake is a small Keys community where the combination of Monroe County's strict land-use constraints and direct coastal proximity concentrates value into a compact, low-turnover market — one where pricing spreads can be wide and condition-driven, and where the number of true comparables at any given moment is limited.
Who FONTAINE LAKE is best for.
Best for
- A buyer with the budget to comfortably support a median near $1.49M who views Keys waterfront land as a long-duration hold, not a trade.
- A second-home or retreat buyer for whom low density and a Keys setting are the primary objectives and amenity infrastructure is secondary.
- A seller-side client who understands that realistic pricing and a patient timeline — roughly 80 days to contract — are the mechanics of this specific market.
Probably not for
- A buyer whose budget is stretched to reach the median, leaving no room to absorb a value gap between asking price and a supportable appraisal in a thin-comp environment.
- Anyone needing a club, pool, or on-site managed amenities that current MLS listings do not confirm exist in this community.
- An investor or buyer requiring a predictable short resale window — four closings per tracked period means timing an exit is speculative, not strategic.
Price History: What Homes Here Have Actually Sold For
Median sale price over the trailing 12 months ending July 27 of each year, from record-level floridakeys closed sales. Same methodology as every appreciation figure on this page: the 2026 point ($1.49M) IS the median in the snapshot above.
Windows contain 0 to 4 sales each (4 in the current window); every figure carries its sample size, and thin markets swing on single closings. Listing data provided by Florida Keys MLS, Inc. Information is deemed reliable but is not guaranteed by the MLS to be accurate. Deemed reliable but not guaranteed.
The FONTAINE LAKE buying strategy.
If we were buying in FONTAINE LAKE 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 FONTAINE LAKE.
A thin market with outsized stakes
Four closings in the tracked window is a meaningful signal: Fontaine Lake does not trade frequently. That illiquidity cuts both ways. For a buyer, it means fewer competing offers in a typical cycle but also fewer data points to anchor a negotiation — comps age quickly and may reflect conditions that no longer apply. For a seller, it means patience is non-negotiable; the roughly 80-day median time to contract is a baseline, not an outlier.
No community amenities are identified in current MLS listings, which suggests the draw here is the Keys setting itself — the water, the proximity to Plantation Key's marine environment, and the land constraints that keep density low — rather than any managed-amenity package. Buyers prioritizing clubhouses, pools, or organized facilities should confirm on-site what MLS data does not reflect before committing to due diligence.
The location and the amenities are priced into every listing in FONTAINE LAKE. The deal is won or lost on condition, the comps, and the renovation math.
Why work with Momentum here
In a market this thin, the difference between a well-supported offer and a speculative one comes down to how deeply your agent understands Keys-specific valuation drivers: canal access versus open water, lot elevation, FEMA flood designations, and Monroe County's development regulations. Momentum brings that transactional discipline to every engagement — so whether you are positioning a listing at a price the market will actually validate or stress-testing a purchase offer against a handful of real comparables, you get analysis grounded in what the data actually says.
FONTAINE LAKE in 15 seconds.
HOA, CDD & Fees
- Mandatory HOA — confirm current dues
- 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 FONTAINE LAKE 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 FONTAINE LAKE sales matched to your home.
Price it to the comps and condition, not an automated estimate.
If you are thinking about selling in FONTAINE LAKE, the right list price comes from recent comparable sales matched to your home's condition and location, not an automated estimate.
What is your FONTAINE LAKE home worth?
Get a no-obligation home value based on real comparable sales in FONTAINE LAKE, 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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Frequently Asked Questions
What is the median home price in FONTAINE LAKE?
How long do homes in FONTAINE LAKE take to sell?
Do cash buyers compete in FONTAINE LAKE?
Who is the best real estate agent for FONTAINE LAKE?
How do I find a top Plantation Key real estate agent who knows FONTAINE LAKE?
Can Momentum Realty connect me with an agent for FONTAINE LAKE?
Should you buy in FONTAINE LAKE?
An honest fit check. We will tell you when it is not your community.
Data sources & freshness
| Community market stats | floridakeys closed sales, 12-month windows ending July 27, 2026 |
| Historical depth | Closed-sale records back to 2006 (39 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 floridakeys 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.
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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 floridakeys member average and 8 days faster, and we’ll price yours against live your area comps.
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More Plantation Key & The Florida Keys & Monroe County guides
Compare before you commit - every guide covers pricing, HOA/CDD, insurance posture, and fit. Browse all of The Florida Keys & Monroe County or the full Neighborhood Finder.