251 Crandon Blvd · Key Biscayne, FL 33149

Part of Key Colony · 7 buildings

Oceansound at Key Colony

12-story mid-rise, completed 1979, 311 residences in Key Biscayne. 1 for sale and 11 for rent on Nov 2, 2026.

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At a glance Oceansound at Key Colony (251 Crandon Blvd, Key Biscayne) is a 12-story, 311-unit building completed in 1979. As of Nov 2, 2026, 1 unit is for sale and 11 are for rent; the median closed price was $729 per square foot over 5 sales in the last 12 months. FEMA flood zone AE. Source: Miami Assoc. of REALTORS® MLS via Bridge IDX, Miami-Dade Property Appraiser records and the FEMA flood map.

6 photos from my condo archive

For sale
1
For rent
11
Median $/SF
$7295 sales · 12 mo
Sold
5last 12 months
Part of
Key Colony
Built
1979
Floors
12
Residences
311county
Flood zone
AEFEMA
Owner-occupied
50%

MLS via Bridge IDX · as of Nov 2, 2026 · How these numbers are made

On the market at Oceansound at Key Colony.

The weekly MLS snapshot, newest asks first. Each unit opens its full listing: photos, taxes, history. Or check the live feed for today's inventory.

Snapshot as of Nov 2, 2026.

Under contract 2

  • Unit 139$10,000/mo · 3 bd
  • Unit 1227$10,000/mo · 2 bd

Listings matched to this building's recorded addresses. I don't have to be the listing agent to show you any unit or to negotiate for you. Search condos in 33149

Oceansound at Key Colony, floor by floor.

Every unit the MLS has recorded here, placed by its unit number: floors up, lines across, each column as wide as the units in it. Amber is for sale today (a unit listed both for sale and for rent is amber). Hover or tap a unit to read its record.

123 units seen · MLS via Bridge IDX · as of Nov 2, 2026
  • For sale 1
  • Under contract 2
  • For rent 10
  • Sold or leased, last 12 months 25
  • Seen in the MLS before that 85
  • No MLS record seen 213
0004060810222324252729303134363840411211050004060920232527293134363840121105

Tap a unit to read its record here. Amber and white units open their listing page.

Units seen123of 311 residences on record
Floors with units12floors 1 to 12
Lines28stacks of units, by number

Closed $/SF by height sales in the 24 months to Nov 2, 2026

Upper floorsfloors 9 to 122 sales, too few for a median
Middle floorsfloors 5 to 8$849/SF · 6 sales
Lower floorsfloors 1 to 4$710/SF · 4 sales

Closed $/SF figures use the 12 recorded sales of these units in the 24 months to Nov 2, 2026; a median needs three. Floor, line and size are the record's. Views and orientation are not in it and are not shown.

The largest typical unit is line 30, a median 2,014 sf over 4 units seen, recorded with 3 bedrooms.

The lines what the MLS record holds for each stack of units
LineUnits seenTypical sizeBedsOn the marketClosed $/SF · 24 mo
Line 0021,522 sf2––
Line 0251,464 sf2––
Line 0451,532 sf211 sale, too few
Line 0551,724 sf2––
Line 0651,870 sf21–
Line 0831,532 sf2––
Line 0941,612 sf31–
Line 1041,611 sf2––
Line 2031,485 sf2––
Line 2271,546 sf2–1 sale, too few
Line 2341,838 sf2––
Line 2441,773 sf2–1 sale, too few
Line 2551,532 sf221 sale, too few
Line 2631,532 sf2––
Line 2731,546 sf22–
Line 2881,532 sf2–1 sale, too few
Line 2961,532 sf212 sales, too few
Line 3042,014 sf3––
Line 3181,546 sf2–1 sale, too few
Line 3351,532 sf211 sale, too few
Line 3461,560 sf211 sale, too few
Line 3551,546 sf21–
Line 3641,608 sf2––
Line 3751,532 sf2–1 sale, too few
Line 3831,546 sf21–
Line 3921,546 sf21–
Line 4021,921 sf2––
Line 4131,532 sf2–1 sale, too few

6 units in the record sit outside this grid (141/LANAI, 160, 243, 307, 342, 600 & 602): penthouse, townhouse or ground-level numbers, or lines seen only once or twice.

How this is drawn: a unit's floor and line come from its MLS unit number alone (5614 is floor 56, line 14). A cell exists only where the MLS has recorded a listing, a closing or a lease; a blank means no record was seen, not that no unit exists. Column widths follow each line's median recorded living area. Pre-construction towers and buildings with a thin record have no drawing.

Floor and line from the MLS unit number; a blank cell means no record was seen. How these numbers are made

The read on Oceansound at Key Colony.

Activity as of Nov 2, 2026
  • One of the 7 buildings of Key Colony. Its own condominium, 311 residences at this address (Miami-Dade Property Appraiser). The complex page adds up the sales and listings of every building.
  • Resale +48%. The median closed price moved from $484/SF in 2020 (9 sales) to $718/SF in 2026 (4 sales), the first and last years with three or more recorded sales.
  • Gross rental yield 8.0%. A year of rent at the median $4.85/SF/mo (23 leases) against the median $729/SF sale (5 sales), both over 12 months, before HOA, taxes and vacancy.
  • Sells in a median 92 days. Days on market across the 5 sales closed in the last 12 months.
  • A renters' building. Leases outnumbered sales 5 to 1 over the last 12 months (23 leases, 5 sales), at a median $8,000 a month.
Read the full record 4 paragraphs and 13 facts, every figure from the MLS and county record

Oceansound at Key Colony is a 12-story mid-rise at 251 Crandon Blvd in Key Biscayne, built in 1979. County folio records count 311 residences, averaging 1,689 SF of living area. The condo archive records it as waterfront (ocean). MLS and county records use the legal name Key Colony No 2 Condo.

One unit was for sale on November 2, 2026, asking $1.9M (that is $1,229/SF). Five sales closed between November 2, 2025 and November 2, 2026, from $995K to $1.3M, a median $729/SF, after a median 92 days on the market. In the 12 months before that, seven sales closed at a median $849/SF, so the median fell 14%. Across 71 recorded sales since 2019, the best year by median price per square foot was 2024, at $986 over 8 sales. That 12-month median ranks 21st of the 23 Key Biscayne buildings with at least three sales in the same window. Two-bedrooms made up 11 of the 12 sales in the last 24 months, at a median $1,125,000.

11 units were offered for rent at $6,500 to $10,500 a month. 23 leases were signed over the same 12 months, at a median $8,000 a month (range $5,000 to $14,500). Leases outnumbered sales 5 to 1 over that year, so renters are a large share of who lives here.

County records show 50% of residences as owner-occupied.

Sources: Miami Assoc. of REALTORS® MLS via Bridge IDX (activity as of November 2, 2026), Miami-Dade Property Appraiser records and my condo archive. Blanks mean the record doesn't state it; nothing here is estimated.

The record

Address
251 Crandon Blvd, Key Biscayne 33149
Neighborhood
Key Biscayne
Year built
1979
Floors
12
Residences (county-verified)
311
Owner-occupied
50% of residences
Avg. unit size
1,689 sq ft
Total living area
525,262 sq ft
County condo folios
311
Waterfront
Yes / Ocean
Recorded MLS listings
242
Recorded as
Key Colony No 2 Condo
Also recorded as
251 Crandon Bl

The numbers at Oceansound at Key Colony.

Every sale and lease the MLS has recorded at this address, sales first.

MLS via Bridge IDX · as of Nov 2, 2026

Median $/SF by year closed

Every recorded sale at this address, 2019 to 2026. Count in the tooltip.

$493$986$5052019$4842020$6502021$8382022$8892023$9862024$8492025$7182026$493$986$505'19'20$650'21'22'23$986'24'25$718'26

Pale bars: fewer than three sales that year, so the bar is the sale itself or the average of two, too few for a median.

Year by year, every recorded closing
YearSalesMedian $/SFLeasesMedian rent
2026 (to date)4$71819$7,500/mo
20257$84919$7,500/mo
20248$98620$6,750/mo
20235$88918$6,950/mo
202219$83822$7,250/mo
202118$65026$6,000/mo
20209$48425$4,150/mo
20191$505*6$4,200/mo

* Fewer than three closings that year: the figure is the closing itself or the average of two, too few for a median.

Own here? See how the building moved since you bought.

Median closed $/SF in 2020: $484 (9 sales). In the last 12 months: $729 (5 sales). Change: +51%.

This is the building's movement, not your unit's value. Floor, view, line and condition move a unit's price more than the building does. Only years with three or more recorded sales are listed.

Get your unit's value →
Show all closings 71 sales · 155 leases on record since 2019

Closed sales Nov 2, 2024 to Nov 2, 2026 · 12

UnitBDBASFAskedClosed$/SFClose dateDOM
133221,537$1,120,000$1,120,000$729Jun 29, 20261
625221,532$1,300,000$1,125,000$734Apr 7, 2026154
237221,532$1,025,000$995,000$649Mar 19, 2026593
441221,532$1,150,000$1,084,460$708Mar 3, 202692
628221,532$1,349,000$1,300,000$849Dec 18, 202530
829221,532$1,585,000$1,420,000$927Sep 29, 2025178
904221,532$1,100,000$1,000,000$653Aug 25, 202560
624443,064$3,095,000$2,850,000$930Aug 13, 202522
222221,546$1,160,000$1,101,500$712Aug 6, 2025114
831221,546$1,195,000$1,200,000$776May 30, 20259
529221,532$1,450,000$1,300,000$849May 29, 2025135
1034221,560$1,900,000$1,825,000$1,170Dec 20, 202435

Leases signed Nov 2, 2025 to Nov 2, 2026 · 23

UnitBDBASFAsked/moLeased/mo$/SF/moLease dateDOM
931221,546$7,900/mo$7,500/mo$4.85Oct 28, 202655
210221,611$8,500/mo$8,500/mo$5.28Oct 14, 202641
202221,464$6,900/mo$6,300/mo$4.30Sep 1, 202666
133221,537$7,500/mo$5,000/mo$3.25Aug 21, 202614
103722.52,310$12,000/mo$11,000/mo$4.76Aug 12, 202697
322221,546$7,200/mo$7,200/mo$4.66Aug 3, 20269
141221,532$8,500/mo$8,000/mo$5.22Aug 1, 202632
1228221,532$8,000/mo$8,000/mo$5.22Jul 13, 2026171
1105221,368$7,900/mo$7,500/mo$5.48Jul 1, 202655
233221,532$6,000/mo$6,000/mo$3.92May 25, 2026144
136221,532$6,000/mo$5,500/mo$3.59May 20, 202616
531221,546$8,150/mo$8,150/mo$5.27May 1, 202620
430332,014$11,000/mo$10,000/mo$4.97Apr 24, 2026353
1222221,546$7,800/mo$6,500/mo$4.20Apr 10, 2026284
704221,532$6,300/mo$6,150/mo$4.01Mar 26, 202652

The 15 most recent of 23.

Data: Miami Assoc. of REALTORS® MLS via Bridge IDX, as of Nov 2, 2026. Listings matched to this building's recorded addresses; pending includes under-contract. Closed listings shown as records only, no photos. Blanks mean the record doesn't state it. How these numbers are made

The file on Oceansound at Key Colony.

The rules on record, the documents in my files, the two Florida checks every buyer should run, and the buildings around it. Each card opens.

FEMA flood zone

AE

Inside FEMA's Special Flood Hazard Area. A federally backed mortgage requires flood insurance here.

What the zone means
  • The 1% annual chance ("100-year") flood area, with a base flood elevation set.
  • Base flood elevation 8 ft (NGVD29).
  • The zone is a map line, not a premium. Ask the association for its master flood policy, and get a flood quote for the specific unit before you commit.

FEMA National Flood Hazard Layer, checked at the building's mapped location on Oct 12, 2026. Open the official map ↗

Milestone structural inspection

Turned 30 in 2009

The statute's first deadline for a building this age was December 31, 2024, then every 10 years.

What the deadline means
  • Based on year built 1979 (county record). The statute counts from the certificate of occupancy date, which can differ.
  • The association must give every owner the inspector's summary. Ask for it, and for the structural integrity reserve study, before you commit.

Fla. Stat. § 553.899(3) ↗ and Miami-Dade recertification ↗, read Oct 9, 2026. What the deadline means for buyers

Nearby

Around Oceansound at Key Colony

5 more nearby

Compare with the two nearest →Every Key Biscayne building →Distances are straight-line. Building data from Miami Assoc. of REALTORS® MLS records via Bridge IDX.

Own here, or looking here

Owners: tell me your unit and I'll prepare its value myself. Buyers and renters: I'll tell you when a unit here lists or sells. Either way it starts a conversation with me, not a mailing list.

Own here?

Get your unit's value

Tell me your unit and I'll prepare its value myself, from Oceansound at Key Colony's closed sales and what is listed now. Then we talk it through.

Phone or email. One is enough.

Thinking about

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Looking here?

Get alerts when a unit lists or sells

When a unit at Oceansound at Key Colony lists or sells, I'll let you know. I send these myself, not a robot.

Phone or email. One is enough.

Alerts for

Goes to Enrique only. No mailing list.

Enrique Ponte Ojeda on a balcony overlooking the water in Miami
I read the building before you buy or sell a unit in it.Closed history, the association's rules, what is really for sale and what it should trade at. Then we talk.
Enrique Ponte Ojeda
Licensed Florida Real Estate Agent · Carmona Realty Group

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