430 Grand Bay Dr · Key Biscayne, FL 33149

Grand Bay Tower

14-story mid-rise, completed 1999, 100 residences in Key Biscayne. 2 for sale on Nov 2, 2026.

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At a glance Grand Bay Tower (430 Grand Bay Dr, Key Biscayne) is a 14-story, 100-unit building completed in 1999. As of Nov 2, 2026, 2 units are for sale and none for rent; the median rent was $19,000 a month over 6 leases 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.

For sale
2
For rent
0
Median rent
$19,000/mo6 leases · 12 mo
Sold
2last 12 months
Built
1999
Floors
14
Residences
100county
Flood zone
AEFEMA
Owner-occupied
50%
Avg. unit
3,450sq ft

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

On the market at Grand Bay Tower.

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.

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

Grand Bay Tower, 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.

32 units seen · MLS via Bridge IDX · as of Nov 2, 2026
  • For sale 2
  • Under contract 2
  • Sold or leased, last 12 months 7
  • Seen in the MLS before that 21
  • No MLS record seen 64
01020304050607081211050102030405060708121105Floors 13 to 14: no unit seen in the MLSFloors 13 to 14: no unit seen in the MLS

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

Units seen32of 100 residences on record
Floors with units12floors 1 to 12
Lines8stacks of units, by number

Closed $/SF figures use the 2 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 01, a median 3,950 sf over 3 units seen, recorded with 2 bedrooms.

The lines what the MLS record holds for each stack of units
LineUnits seenTypical sizeBedsOn the marketClosed $/SF · 24 mo
Line 0133,950 sf21–
Line 0253,950 sf3–1 sale, too few
Line 0333,630 sf3–1 sale, too few
Line 0433,680 sf4––
Line 0532,930 sf3––
Line 0632,930 sf31–
Line 0762,840 sf31–
Line 0862,840 sf31–

3 units in the record sit outside this grid (PH-2DS, PH-2EN, PH-2ES): 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 Grand Bay Tower.

Activity as of Nov 2, 2026
  • Resale +44%. The median closed price moved from $845/SF in 2020 (5 sales) to $1,218/SF in 2023 (6 sales), the first and last years with three or more recorded sales.
  • A renters' building. Leases outnumbered sales 3 to 1 over the last 12 months (6 leases, 2 sales), at a median $19,000 a month.
Read the full record 4 paragraphs and 10 facts, every figure from the MLS and county record

Built in 1999, Grand Bay Tower is a 14-story mid-rise at 430 Grand Bay Dr in Key Biscayne. The Miami-Dade Property Appraiser lists 100 residential units, averaging 3,450 SF of living area.

On November 2, 2026, two units were listed for sale, asking $3.9M to $6.9M ($1,331 to $1,747/SF). Two more were under contract. Two sales closed between November 2, 2025 and November 2, 2026, from $5.2M to $6.2M, $1,327 and $1,694/SF. The MLS holds 27 closed sales here going back to 2020; among years with three or more sales, 2023 set the high at a median $1,218/SF.

Six leases were signed over the same 12 months, at a median $19,000 a month (range $16,000 to $20,000). Leases outnumbered sales 3 to 1 over that year, so renters are a large share of who lives here.

About 50% of the residences are owner-occupied according to county records.

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

The record

Address
430 Grand Bay Dr, Key Biscayne 33149
Neighborhood
Key Biscayne
Year built
1999
Floors
14
Residences (county-verified)
100
Owner-occupied
50% of residences
Avg. unit size
3,450 sq ft
Total living area
344,950 sq ft
County condo folios
100
Recorded MLS listings
52

The numbers at Grand Bay Tower.

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, 2020 to 2026. Count in the tooltip.

$755$1,510$8452020$8452021$1,1722022$1,2182023$1,2632024$1,5102026$755$1,510$8452020$8452021$1,172202220232024$1,5102026

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)2$1,510*5$18,000/mo
2025––3$19,000/mo
20241$1,263*3$17,500/mo
20236$1,2181$12,500/mo*
20224$1,1721$16,000/mo*
20219$8453$17,000/mo
20205$8452$10,525/mo*
2019––1$7,100/mo*

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

Show all closings 27 sales · 19 leases on record since 2020

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

UnitBDBASFAskedClosed$/SFClose dateDOM
110333.53,630$6,850,000$6,150,000$1,694Oct 30, 202686
90235.53,950$5,100,000$5,240,000$1,327Apr 20, 20263

Leases signed Nov 2, 2025 to Nov 2, 2026 · 6

UnitBDBASFAsked/moLeased/mo$/SF/moLease dateDOM
904463,680$18,000/mo$18,000/mo$4.89Jul 13, 2026175
207553,170$18,000/mo$16,000/mo$5.05Jul 1, 2026207
60834.52,840$18,000/mo$17,000/mo$5.99Jun 1, 202646
120434.53,680$20,000/mo$20,000/mo$5.43May 8, 2026112
30235.53,950$25,000/mo$20,000/mo$5.06May 1, 2026209
60834.52,840$18,000/mo$20,000/mo$7.04Nov 15, 202524

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 Grand Bay Tower.

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

Due 2029

Due by statute by December 31, 2029, 30 years after 1999, then every 10 years.

What the deadline means
  • Miami-Dade sets 25 years for condo buildings within three miles of the coastline, which would be December 31, 2024.
  • Based on year built 1999 (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 Grand Bay Tower

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.

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Get your unit's value

Tell me your unit and I'll prepare its value myself, from Grand Bay Tower's closed sales and what is listed now. Then we talk it through.

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Looking here?

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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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