42 Card Sound Rd is a 3,859 square foot house on a 0.88 acre lot with 4 bedrooms and 4 bathrooms. - it last sold on April 16, 1998 for $985,000. Based on Redfin's Key Largo data, we estimate the home's value is $5,209,344.
Single-familyProperty Type
1975Year Built
0.88 acresLot Size
$1,350Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$5,209,344
$4.2M since sold in April 1998$32K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 196.6% higher than the average sale price ($1.76M) of 6 comparable homes.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning
IS
Improved Subdivision District
The purpose of the IS district is to accommodate the legally vested residential development rights of the owners of lots in subdivisions that were lawfully established and improved prior to the adoption of this LDC. For the purpose of this section, improved lots are those that are served by a dedicated and accepted existing road of porous or nonporous material, that have an approved potable water supply, and that have sufficient uplands to accommodate the proposed use in accordance with the required setbacks. This district is not intended to be used for new land use districts of this classification within the county.
Permitted uses
Include but are not limited to:
Housing-Multiple units
Infrastructure
Property details
Interior
Bathroom Information
# of Full Baths: 4
Exterior
Exterior Information
Physical Condition: Average
Floor Construction Type: Concrete
Foundation Type: Slab
Exterior Wall: Custom
Roof Shape Type: Irregular
Building Type: Residential
Pool Information
Pool Type: Concrete
Has Pool
Property Information
Subdivision Name: GRAYVIK EXT 1ST ADD OR #1 REV
Living Sq. Ft: 3,859
Gross Sq. Ft: 8,622
Ground Floor Sq. Ft: 3,859
Building Sq. Ft: 3,859
# of Units: 1
# of Stories: 2
Legal Description: LT 21 FIRST REVISION FIRST ADDITION GRAYVIK EXTENSION KEY LARGO PB6-104 OR556-1069 OR807-1737 OR856-1104 OR1509-927 OR2804-184
Parking & Garage Information
Parking Type: Finished Block Garage
Garage/Parking Sq. Ft: 585
Garage / Carport Type: Finished Block
Lot Information
# of Buildings: 1
Land Sq. Ft: 38,475
Legal Lot Number: 21
Legal Block Number: 19
Municipality Type: ORF
Municipality Name: OCEAN REEF
Acres: 0.8833
Zoning Code: IS
County Use Description: SINGLE FAMILY RES
State Use Description: SINGLE FAMILY
Financial
Assessor Information
Assessment Year: 2025
Tax District County: OCEAN REEF
Tax Area: N KEY LARGO/OCEAN REEF MUNIC S
Public facts
Beds: 4
Baths: 4.0
Sq. Ft.: 3,859
Stories: 2.0
Lot Size: 0.88 acres
Style: Single Family Residential
Year Built: 1975
Year Renovated: 1998
County: Monroe County
APN: 1259 40 00572225000100
Home facts updated by county records on Jul 10, 2026
Around this home
Schools
Key Largo School
Public PreK-8 • Assigned • 12.4mi
8/10
Coral Shores High School
Public 9-12 • Assigned • 26.8mi
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 106° expected this year, 32 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 Largo, FL • 33037
Average low and high temperatures (°F)
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68
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Sun exposure
In this area, properties receive around 9.4 hours in
June and 7 hours in December, placing it above the
U.S. average for solar exposure.