Google street view image for 300 Harbor Ct, Key Biscayne, FL 33149

Off market aug 1999 for $527K

$3,473,319

Est. refi paymentEst. refi $3,644/mo

•

3 ba

•

2,219

sq ft

300 Harbor Ct, Key Biscayne, FL 33149

About this home

300 Harbor Ct is a 2,219 square foot house on a 8,406 square foot lot with 4 bedrooms and 3 bathrooms. - it last sold on August 13, 1999 for $527,400. Based on Redfin's Key Biscayne data, we estimate the home's value is $3,473,319.

Single-familyProperty Type

1964Year Built

8,406 sq ftLot Size

$1,565Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$3,473,319

$2.9M since sold in August 1999$393K since October

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 14.9% higher than the average sale price ($3.02M) of 5 comparable homes.

SOLD AUG 24, 2026
$3,100,000
A
4 beds3 baths2,068 sq ft
301 Hampton Ln, Key Biscayne, FL 33149
SOLD APR 2, 2026
$2,200,000
B
4 beds3 baths2,334 sq ft
3551 E Glencoe St, Miami, FL 33133
SOLD APR 20, 2026
$3,000,000
C
4 beds3 baths2,958 sq ft
401 Warren Ln, Key Biscayne, FL 33149
SOLD OCT 14, 2026
$3,800,000
D
5 beds4 baths2,821 sq ft
269 Cranwood Dr, Key Biscayne, FL 33149
SOLD JUL 15, 2026
$3,010,000
E
3 beds2 baths2,113 sq ft
204 Westwood Dr, Key Biscayne, FL 33149

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Earn from this home

Sell

$3,207,866

Est. take-home

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Est. cash available

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Rent

$8,340/mo

Redfin rental estimate

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Market trends in 33149, FL

Last updated October 2026

Buyer's Market

Seller's Market

Buyer's market

Sale-to-list price

95.0%

0.1% MoM

Median sale price

$1.5M

$447 MoM

Avg. days on market

92d

17 days MoM

Recently sold homes

11 MoM

New listings for sale

$19,750,000
6 beds6.5 baths6,468 sq ft
1080 Mariner Dr, Key Biscayne, FL 33149
(305) 666-0562
$520,000
2 beds2 baths965 sq ft
300 Galen Dr #401, Key Biscayne, FL 33149
(305) 726-5818
$2,900,000
2 beds2.5 baths2,220 sq ft
251 Crandon Blvd #806, Key Biscayne, FL 33149
(646) 480-7665
$12,990,000
4 beds5.5 baths7,400 sq ft
445 Grand Bay Dr Ph -2A, Key Biscayne, FL 33149
(305) 365-2811
$2,950,000
3 beds3 baths2,602 sq ft
765 Crandon Blvd #311, Key Biscayne, FL 33149
(305) 365-0711
$429,000
Studio1 bath410 sq ft
Key Biscayne, FL 33149
(305) 361-5454
$750,000
2 beds2 baths1,187 sq ft
201 Galen Dr #110, Key Biscayne, FL 33149
(786) 210-3562
OPEN SAT, 12PM TO 2PM
$19,450,000
7 beds7.5 baths6,497 sq ft
550 Harbor Dr, Key Biscayne, FL 33149
(305) 345-2023
See all

Provided by Redfin

Sale history for 300 Harbor Ct

Tax history for 300 Harbor Ct

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Zoning and permits

Zoning
Permits

Village Residential District

These districts are designed to protect the character of Single Family and Two-Family homes and to regulate Development within the district as relates to neighboring properties and adjacent streets.

Permitted uses

Include but are not limited to:

Housing-Single unit

Mar 24, 2025 • Final

Master building

Perform a level 3 alteration and exterior improvements to a residential property. Work includes replacing an asphalt circle drive with a pervious driveway, installing new drainage, irrigation, landscaping, and a front yard fence. Additional work includes constructing an outdoor kitchen, a carport with a covered walkway, a cabana bath, and refinishing the existing swimming pool.

Addition

Bathroom

Grading

Kitchen

Plumbing

Pool and hot tub

Dec 12, 2024 • Final

Master building

Perform an interior remodel.

Remodel

Permit history is from public records and may be incomplete or inaccurate. Redfin and its agents make no representations about the property condition or permit status. Buyers should independently verify all information.

Property details

Exterior

Exterior Information
Construction Type: Concrete Block
Exterior Wall: Cbs/Holw Tile/Fr/Stud/Sheat/Sd
Roof Covering Type: Bahama/Ceramic Tile/Blt-Up Tg
Roof Shape Type: Bahama/Ceramic Tile/Blt-Up Tar and Gravel

Pool Information
Has Pool

Property Information
Subdivision Name: TROPICAL ISLE HOMES SUB
Living Sq. Ft: 2,219
Adjusted Gross Sq. Ft: 2,172
Building Sq. Ft: 2,435
# of Units: 1
# of Stories: 1
Legal Description: TROPICAL ISLE HOMES SUB 4TH ADDN PB 53-39 LOT 20 BLK 31 LOT SIZE 84.060 X 100 OR 18739-0787 0899 1 COC 22295-0256 03 2004 4

Lot Information
# of Buildings: 1
Land Sq. Ft: 8,406
Legal Lot Number: 20
Legal Block Number: 31
Municipality Name: KEY BISCAYNE
Acres: 0.193
Depth Footage: 100
Front Footage: 84.06
Zoning Code: 0100
County Use Description: RES - SINGLE FAMILY : 1 UNIT
State Use Description: SINGLE FAMILY

Financial

Assessor Information
Assessment Year: 2025

Public facts

Beds: 4
Baths: 3.0
Sq. Ft.: 2,219
Stories: 1.0
Lot Size: 8,406 square feet
Style: Single Family Residential
Year Built: 1964
Year Renovated: 1974
County: Miami-Dade County
APN: 2442320063530

Home facts updated by county records on Oct 14, 2026

Around this home

Schools

K - 12
Preschool & daycare

Key Biscayne K-8 Center

Public PreK-8 • Assigned • 0.4mi

8/10

Coral Gables Senior High School

Public PreK-12 • Assigned • 6.3mi

5/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Climate risks

9/10 Flood Factor

Estimated 80%+ chance of a flood reaching the building in the next 30 years

1/10 Fire Factor

Unlikely to be in a wildfire in next 30 years

10/10 Heat Factor

7 days above 102° expected this year, 28 days in 30 years

10/10 Wind Factor

99% chance of strong winds in next 30 years

2/10 Air Factor

1 unhealthy days expected this year, 1 days in 30 years

Provided by First Street

Historical weather

Key Biscayne, FL • 33149

Average low and high temperatures (°F)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

In this area, properties receive around 9.5 hours in June and 6.9 hours in December, placing it above the U.S. average for solar exposure.

9.5 hrs

6.9 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$3.30M – $4.00M

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New listings for sale in 33149

$19,750,000

6 beds6.5 baths6,468 sq ft

1080 Mariner Dr, Key Biscayne, FL 33149

Private cul-de-sac • Water views • Mangrove views

(305) 666-0562

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2 beds2 baths965 sq ft

300 Galen Dr #401, Key Biscayne, FL 33149

Corner-unit condo • $971 HOA • Parking

(305) 726-5818

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2 beds2.5 baths2,220 sq ft

251 Crandon Blvd #806, Key Biscayne, FL 33149

Impact windows • $2,452 HOA • 2 garage spots

(646) 480-7665

$12,990,000

4 beds5.5 baths7,400 sq ft

445 Grand Bay Dr Ph -2A, Key Biscayne, FL 33149

Oceanfront living • Panoramic views • Oversized terraces

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$2,950,000

3 beds3 baths2,602 sq ft

765 Crandon Blvd #311, Key Biscayne, FL 33149

Enclosed playroom • Serene lake views • $3,395 HOA

(305) 365-0711

$429,000

Studio1 bath410 sq ft

Key Biscayne, FL 33149

Access to beaches • Access to parks • Access to shops

(305) 361-5454

$750,000

2 beds2 baths1,187 sq ft

201 Galen Dr #110, Key Biscayne, FL 33149

Redesigned kitchen • Redesigned bathroom • Enclosed balcony

(786) 210-3562

OPEN SAT, 12PM TO 2PM

$19,450,000

7 beds7.5 baths6,497 sq ft

550 Harbor Dr, Key Biscayne, FL 33149

Waterfront estate • Double lot • Outdoor entertaining

(305) 345-2023

Home values near 300 Harbor Ct

Data from public records.

Address	Redfin Estimate
250 Harbor Dr, Key Biscayne, FL 7 Beds \| 6.5 Baths \| 10574 Sq. Ft.	$21,394,997
275 Harbor Dr, Key Biscayne, FL 4 Beds \| 4 Baths \| 2458 Sq. Ft.	$4,267,022

Address	Redfin Estimate
310 Harbor Ct, Key Biscayne, FL 4 Beds \| - Baths \| 2580 Sq. Ft.	$3,056,547
291 Harbor Ct, Key Biscayne, FL 4 Beds \| 2.5 Baths \| 2549 Sq. Ft.	$3,291,253

Address	Redfin Estimate
340 Harbor Ct, Key Biscayne, FL 3 Beds \| 2 Baths \| 1880 Sq. Ft.	$3,187,381
299 Harbor Ct, Key Biscayne, FL 5 Beds \| 4 Baths \| 3340 Sq. Ft.	$3,977,027

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GreatSchools Ratings provided by GreatSchools.org.

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