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The Roebling Index · Miami
Published by The Roebling Team at Compass · Corey Cohen, NY Licensed Associate Real Estate Broker
Miami·Key Biscayne·Condominium

Grand Bay Tower

430 Grand Bay Drive, Key Biscayne, FL 33149

Folio 2452050600001

At a glance
Year built
1999
Residences
100
Building area
344,950 sq ft
Median residence
3,630 sq ft
FEMA flood zone
Zone AE · BFE 8 ft
Latest arms-length sale
$5,500,000 · Jun 2026
Median sale (10 yr)
$2,800,000
Recorded transfers
299
Own an apartment at Grand Bay Tower?
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Grand Bay Tower is a 100-residence condominium building at 430 Grand Bay Drive, on Key Biscayne. County records list 1999 as the year built. It has a median residence of 3,630 square feet.

The recorded market runs to 222 arms-length sales since 1999, an annual turnover rate of 3.9 percent of the building over the past decade, and a median of $450 per square foot. Across 120 same-unit resales, 88 percent sold above their prior recorded price, with a median gain of 62 percent over a median hold of 6.5 years. The 9 sales since 2023 carry a median of $1,263 per square foot, against a record that opens in 1999 and spans several market cycles. Recorded deeds show 4 parties that acquired more than one residence in the building.

Selling, buying or moving?

Own a residence at Grand Bay Tower? See what it would sell for.

Choose what fits: a property-specific pricing review informed by local transaction records and market research, a conversation about buying in this market, or help planning a move between markets. Local representation is coordinated where appropriate.

Prefer to speak directly? Schedule a consultation →
Corey Cohen, Licensed Associate Real Estate Broker · The Roebling Team at Compass
646.939.7375 · c.cohen@compass.com

At a glance

Building type: Beachfront condominium tower with full-service staffing

Architect: Cohen, Freedman, Encinosa & Associates. The same firm designed 445 Grand Bay Drive.

Developer: GB/JT Hotel Partners

Floors: 14

Unit sizes: Large plans, from about 2,800 square feet to more than 9,000, in two- to four-bedroom layouts.

Amenities: Beach access, pool and spa, fitness center, clubhouse, bike room, valet, concierge.

Source: The Roebling Research Desk.

Why Grand Bay Tower matters

Grand Bay Tower, built in 1999, is part of the Grand Bay Drive development, on the beachfront next to the Ritz-Carlton Key Biscayne, and it sits within a cluster of towers on the same road.

Plans start near 2,800 square feet and run past 9,000, in two- to four-bedroom layouts.

Identity note

Grand Bay Drive carries more than one building. Grand Bay Residences, at 445 Grand Bay Drive, is a separate tower in the same development (two towers and about 49 villas on about 12 acres), with its own association. The Ritz-Carlton Key Biscayne at 455 is a third building. This page covers 430 Grand Bay Drive only. The Grand Bay name is used loosely across both addresses, so check which building and association a listing belongs to. Grove at Grand Bay, at 2669 South Bayshore Drive in Coconut Grove, is an unrelated condominium with a similar name.

Key Biscayne

Key Biscayne is an island village reached by the Rickenbacker Causeway from Brickell and Downtown Miami, about a 15 to 20 minute drive without traffic. Crandon Park, with its beach and tennis center, is at the island's north end, and Bill Baggs Cape Florida State Park is at the south end. The village center along Crandon Boulevard has the island's retail and services, and Grand Bay Drive runs along the beach side.

The island has beach, park and marina access, with Brickell across the causeway. The parcel is in flood zone AE; ask for the flood insurance cost and elevation certificates for any unit.

Architecture and unit composition

The tower is a mid-rise of 14 floors on a beachfront site. Residences are large, with high ceilings and wide terraces, and plans include private elevator foyers on some floors. Plans run to two- to four-bedroom units with three to five bathrooms. Floor plans and interior square footage vary by line. Ask what each unit has had renovated. Request the association's size schedule rather than published figures.

Building operations

The building is staffed with a doorman and concierge, valet parking and assigned garage parking. The grounds include a pool and spa, a fitness center, a clubhouse and media room, a bike room and direct beach access.

Ask for the current staffing levels, the operating budget and what monthly charges include, any shared-facility arrangement with neighboring Grand Bay Drive buildings, and whether a master association applies.

Request the financial statements and any special assessments. Florida's milestone inspection and structural integrity reserve study rules apply to condominium buildings of three or more stories; ask for the inspection report, the reserve study and any assessment history.

Policy framework

Pet, rental and minimum-lease rules are set by the association; confirm at offer stage.

Sales context

One recorded sale, April 2026, at $5.24 million. It is one sale, not a building price. A median assessed value across units of about $3.3 million is a tax figure, not a market price. Pricing varies by size, floor and condition.

Unit-level transaction history is maintained in The Roebling Research Library and shared with clients during diligence.

What to know if you're buying at Grand Bay Tower

Confirm the building. Grand Bay Residences next door is a different association. Check the address and the declaration name on any contract.

Verify interior square footage. Unit sizes span more than three times between the smallest and largest plans.

Price flood and wind. Get insurance quotes before the offer, not after.

What to know if you're selling at Grand Bay Tower

Price against your size band. Compare only to units of similar plan and finish.

Have the documents ready. Budget, reserve study, financials and inspection report shorten diligence.

Comparable buildings

  • Grand Bay Residences — the neighboring tower at 445 Grand Bay Drive, built in 1996 in the same development.
  • Ritz-Carlton Residences, Key Biscayne — the adjacent hotel-branded residences.
  • Key Colony — a Key Biscayne condominium community on Crandon Boulevard.

Compared with

The neighborhood

For the full neighborhood — its buildings and recorded pricing — read The Roebling Index guide to Key Biscayne.

Run the numbers

Related guides

Recorded sales history

Recorded transfers for this building in Miami-Dade County public records, back to Nov 1999. Prices reflect the recorded consideration; transfers the Property Appraiser does not qualify as arms-length are shown unmarked. Nominal-consideration paper transfers (deeds into trusts and LLCs, estate and family transfers, corrective deeds) are part of the record but not sales, and are omitted from this table. Recording lags closing, so the newest sales can take several weeks to appear.

DateResidenceSizePriceArms-length
Jun 20267023,950 sf$5,500,000✓
Apr 20269023,950 sf$5,240,000✓
Mar 20249062,930 sf$3,700,000✓
Oct 20235052,930 sf$3,750,000✓
Jul 202311082,840 sf$3,150,000✓
Apr 202312052,930 sf$3,600,000✓
Mar 20239033,630 sf$4,379,000✓
Mar 20231072,470 sf$2,220,000✓
Feb 202311023,950 sf$5,200,000✓
Oct 202211072,840 sf$3,450,000✓
Mar 20226033,630 sf$4,100,000✓
Mar 20228023,950 sf$5,100,000✓
Jan 20221072,470 sf$2,000,000✓
Dec 2021PH-2EN2,840 sf$3,850,000✓
Aug 202110082,840 sf$2,400,000✓
Aug 20218082,840 sf$2,350,000✓
Jul 20217072,840 sf$2,800,000✓
Jul 202112043,680 sf$4,600,000✓
Jun 20212023,950 sf$2,950,000✓
May 202111013,950 sf$5,000,000✓
Apr 202112052,930 sf$2,600,000✓
Mar 202110033,630 sf$2,800,000✓
Mar 20214062,930 sf$2,022,500✓
Jan 20213052,930 sf$1,700,000✓
Dec 2020PH-2DS2,930 sf$2,279,500✓
Dec 2020PH-2DN2,930 sf$220,000
Nov 202012072,840 sf$2,400,000✓
Nov 20207072,840 sf$2,000,000✓
Sep 20203013,950 sf$1,950,000
Jun 20207013,950 sf$3,470,000✓
Apr 202011043,680 sf$3,275,000✓
Jan 2020PH-2ES2,840 sf$1,975,000✓
Sep 201912052,930 sf$1,950,000✓
Jul 20193013,950 sf$3,000,000✓
Apr 20195023,950 sf$3,350,000✓
Apr 20189052,930 sf$2,325,000✓
Nov 20172083,170 sf$1,900,000✓
Aug 2017PH-2DS2,930 sf$2,350,000✓
Jul 20177062,930 sf$2,050,000✓
Jun 20174072,840 sf$2,100,000✓
Jun 20173023,950 sf$1,926,100
May 201712062,930 sf$2,250,000✓
Dec 20161013,950 sf$1,440,600
Aug 20163072,840 sf$2,350,000✓
May 201610043,680 sf$3,100,000✓
Jan 20167082,840 sf$2,500,000✓
Jul 20157033,630 sf$3,200,000
Jun 201512072,840 sf$2,650,000✓
Apr 20158043,680 sf$3,400,000✓
Feb 201511072,840 sf$2,550,000✓
Jan 20153082,840 sf$2,400,000✓
Jun 20146052,930 sf$2,650,000✓
May 20146013,950 sf$5,100,000✓
Apr 20141072,470 sf$1,600,000✓
Apr 20144013,950 sf$4,300,000✓
Dec 20132033,630 sf$2,862,500✓
Oct 20124052,930 sf$1,780,000✓
Oct 20123013,950 sf$3,450,000✓
Oct 201212043,680 sf$2,600,000✓
Oct 20127062,930 sf$3,400,000✓
Oct 20122023,950 sf$2,750,000✓
Sep 20129062,930 sf$1,800,000✓
Aug 20125052,930 sf$2,100,000✓
Aug 20125052,930 sf$154,300
Aug 20125052,930 sf$308,600
Jul 20121013,950 sf$2,400,000✓
Jun 20127023,950 sf$3,000,000✓
May 201210043,680 sf$2,430,000✓
Apr 20123052,930 sf$1,850,000✓
Mar 20124072,840 sf$1,775,000✓
Oct 20115023,950 sf$3,600,000✓
Aug 20116033,630 sf$2,850,000✓
May 20117072,840 sf$2,160,000✓
Apr 20112023,950 sf$2,150,000✓
Aug 20105052,930 sf$161,800
Apr 20104013,950 sf$3,575,000✓
Nov 200912072,840 sf$1,550,000✓
Mar 200912082,840 sf$1,875,000✓
Feb 20098043,680 sf$1,468,564
Sep 20085062,930 sf$1,800,000✓
Sep 20082043,680 sf$1,980,000✓
Feb 20082073,170 sf$1,825,000✓
Jan 20087013,950 sf$3,600,000✓
Dec 200710013,950 sf$4,125,000✓
Aug 20073033,630 sf$2,786,000✓
Feb 2007PH-2DN2,930 sf$2,600,000✓
Feb 200710062,930 sf$2,150,000✓
Jan 20078072,840 sf$1,952,000✓
Sep 2006PH-1AN9,600 sf$5,000,000✓
Dec 200512082,840 sf$1,975,000✓
Aug 20051013,950 sf$2,150,000✓
Jul 20054052,930 sf$1,850,000✓
Jun 20051072,470 sf$1,500,000✓
May 20057072,840 sf$1,760,000✓
May 200510013,950 sf$2,650,000✓
Jan 200511082,840 sf$1,600,000✓
Jan 200510072,840 sf$1,500,000✓
Dec 20048072,840 sf$1,515,000✓
Dec 20048052,930 sf$1,132,426✓
Nov 2004PH-2EN2,840 sf$1,550,000✓
Sep 20044072,840 sf$1,165,000✓
Jul 20045043,680 sf$1,530,000✓
Jul 20045033,630 sf$1,703,000✓
Apr 20043082,840 sf$950,000✓
Mar 20047033,630 sf$1,700,000✓
Jan 2004PH-2DN2,930 sf$1,225,000✓
Jan 20044013,950 sf$2,500,000✓
Nov 200312082,840 sf$1,000,000✓
Oct 20037043,680 sf$1,460,000✓
Sep 20036023,950 sf$1,975,000✓
May 20031072,470 sf$655,000✓
Apr 20037023,950 sf$1,058,900✓
Feb 20039023,950 sf$2,600,000✓
Jan 20037072,840 sf$1,015,000✓
Dec 20025062,930 sf$1,140,000✓
Nov 20027043,680 sf$1,460,000✓
Jul 20028023,950 sf$2,150,000✓
Jun 20028033,630 sf$1,782,500✓
May 200210043,680 sf$1,500,000✓
Apr 20028033,630 sf$1,600,000✓
Apr 20023033,630 sf$1,300,000✓
Mar 20029043,680 sf$1,425,000✓
Mar 20028043,680 sf$1,450,000✓
Mar 20024023,950 sf$1,550,000✓
Feb 20026043,680 sf$1,350,000✓
Jan 20022033,630 sf$1,050,000✓
Oct 20013023,950 sf$1,300,000✓
Sep 200111072,840 sf$1,110,000✓
Jun 2001PH-2AN5,350 sf$2,375,000✓
Jun 20014033,630 sf$1,350,000✓
May 200112072,840 sf$985,000✓
May 20017072,840 sf$920,000✓
May 20016023,950 sf$2,000,000✓
May 20012023,950 sf$1,100,000✓
May 200110013,950 sf$2,150,000✓
Apr 20015082,840 sf$860,000✓
Apr 20012043,680 sf$1,050,000✓
Mar 20013062,930 sf$582,000✓
Mar 200111052,930 sf$1,021,000✓
Mar 20015023,950 sf$1,625,000✓
Feb 20013043,680 sf$1,050,000✓
Jan 200111043,680 sf$1,700,000✓
Jan 20012013,950 sf$1,360,000✓
Nov 200011072,840 sf$985,000✓
Nov 20007023,950 sf$1,800,000✓
Nov 20007023,950 sf$1,800,000✓
Oct 20002083,170 sf$760,000✓
Oct 20007072,840 sf$920,000✓
Aug 200011062,930 sf$1,055,000✓
Jul 20009072,840 sf$930,000✓
Jun 200012072,840 sf$985,000✓
Jun 20005062,930 sf$825,000✓
May 20005043,680 sf$1,400,000✓
Apr 2000PH-2DS2,930 sf$1,075,000✓
Apr 20003082,840 sf$680,000✓
Apr 20007052,930 sf$905,000✓
Apr 20003033,630 sf$1,200,000✓
Mar 200010072,840 sf$890,000✓
Mar 200012033,630 sf$1,450,000✓
Mar 20006023,950 sf$1,825,000✓
Mar 20008013,950 sf$1,925,000✓
Mar 20004013,950 sf$1,586,000✓
Feb 2000PH-1DN2,930 sf$1,375,000✓
Feb 200012043,680 sf$1,425,000✓
Feb 20007033,630 sf$1,250,000✓
Feb 20008023,950 sf$1,750,000✓
Jan 2000PH-1DN2,930 sf$839,000✓
Jan 2000PH-1CS3,680 sf$1,500,000✓
Jan 2000PH-2ES2,840 sf$945,000✓
Jan 2000PH-2EN2,840 sf$875,000✓
Jan 2000PH-2DN2,930 sf$900,000✓
Jan 2000PH-2CS3,680 sf$3,660,000✓
Jan 2000PH-2AS5,350 sf$3,660,000✓
Jan 2000PH-2AN5,350 sf$2,300,000✓
Jan 200012082,840 sf$875,000✓
Jan 200010082,840 sf$825,000✓
Jan 20009082,840 sf$820,000✓
Jan 20008082,840 sf$775,000✓
Jan 20003072,840 sf$680,000✓
Jan 200012062,930 sf$805,000✓
Jan 20009062,930 sf$775,000✓
Jan 20008062,930 sf$730,000✓
Jan 20006062,930 sf$690,000✓
Jan 200011052,930 sf$940,000✓
Jan 200010052,930 sf$825,000✓
Jan 20005052,930 sf$695,000✓
Jan 20004052,930 sf$695,000✓
Jan 20004043,680 sf$950,000✓
Jan 200011033,630 sf$1,250,000✓
Jan 200012023,950 sf$1,625,000✓
Jan 20007023,950 sf$1,474,400✓
Jan 200012013,950 sf$1,675,000✓
Jan 200010013,950 sf$1,700,000✓
Jan 20006013,950 sf$1,600,000✓
Jan 20001013,950 sf$1,300,000✓
Dec 1999PH-1ES4,420 sf$2,335,000✓
Dec 1999PH-1DS2,930 sf$2,335,000✓
Dec 1999PH-1AN9,600 sf$2,325,000✓
Dec 199911082,840 sf$850,000✓
Dec 19997082,840 sf$1,386,100✓
Dec 19996082,840 sf$755,000✓
Dec 19994082,840 sf$680,000✓
Dec 19998072,840 sf$845,000✓
Dec 19996072,840 sf$775,000✓
Dec 19995072,840 sf$750,000✓
Dec 19994072,840 sf$700,000✓
Dec 19992073,170 sf$750,000✓
Dec 199911062,930 sf$785,000✓
Dec 19997062,930 sf$1,386,100✓
Dec 19994062,930 sf$606,300✓
Dec 199912052,930 sf$880,000✓
Dec 19999052,930 sf$750,000✓
Dec 19998052,930 sf$790,000✓
Dec 19997052,930 sf$740,000✓
Dec 19996052,930 sf$715,000✓
Dec 19993052,930 sf$615,000✓
Dec 199910033,630 sf$1,225,000✓
Dec 19999033,630 sf$1,200,000✓
Dec 19995033,630 sf$1,050,000✓
Dec 199911023,950 sf$1,600,000✓
Dec 199910023,950 sf$1,600,000✓
Dec 19999023,950 sf$1,560,000✓
Dec 199911013,950 sf$1,650,000✓
Dec 19999013,950 sf$1,675,000✓
Dec 19998013,950 sf$1,560,000✓
Dec 19997013,950 sf$1,560,000✓
Dec 19995013,950 sf$1,453,400✓
Dec 19994013,950 sf$1,450,000✓
Dec 19993013,950 sf$1,425,000✓
Nov 199910062,930 sf$900,000✓
Nov 19996033,630 sf$1,575,000✓

✓ = qualified arms-length per the Miami-Dade Property Appraiser. 68 nominal-consideration paper transfers omitted.

This page reflects publicly available information compiled by The Roebling Research Desk. Specific building details should be confirmed with the association during due diligence; the recorded Declaration of Condominium, the current building budget, the current tax bill, the structural integrity reserve study and milestone-inspection status should be reviewed for any specific transaction. © 2026 The Roebling Team at Compass.

Considering a move at Grand Bay Tower?

Request a private building brief with the relevant recorded sales, current and off-market availability, and an apartment-specific view of value.

Prefer to speak directly? Schedule a consultation →
Corey Cohen, Licensed Associate Real Estate Broker · The Roebling Team at Compass
646.939.7375 · c.cohen@compass.com

Building facts and sales records are compiled from Miami-Dade County public records (Property Appraiser) and reviewed against recognized architectural references. Figures are reported as recorded and may be updated as the county updates its records. This page is informational and is not an offer or solicitation. Apartment estimates are automated, from public records, and are not appraisals.

A note on representation

The Roebling Team at Compass is led by Corey Cohen, a New York licensed associate real estate broker. For a purchase or sale in Miami, we introduce you to a licensed Compass agent there by referral and handle the New York side of your move ourselves. This page and its calculators are research, not an offer of representation.

To plan a move between Manhattan and Miami, schedule a consultation; where appropriate we’ll introduce you to a vetted Compass agent in the local market.