Tucked away on a quiet private enclave just steps from iconic Sombrero Beach, this open-water retreat offers stunning ocean views and an ever-changing palette of turquoise and deep blue waters. Located on exclusive Treasure Road, this is a setting you only drive down if you live there, peaceful, private, and perfectly positioned just moments from the sand. The home features 3 bedrooms and 3.5 baths, with approximately 2,300+ sq ft of living space on an almost 12,000 sq ft lot, including 77 feet of concrete seawall and approximately 89 feet of waterfront. The primary living room showcases high ceilings and expansive sliding glass doors that open directly to incredible open-water views, filling the space with natural light and creating a seamless indoor-outdoor connection. Sunset views stretch across the water, while mature tropical landscaping, shady trees, and a heated 15' x 30' concrete pool create a true island oasis. Each bedroom is an ensuite, offering comfort and privacy, with an additional half bath conveniently located near the pool. The home has wonderful character, a second living area downstairs, a covered lanai ideal for outdoor dining and relaxing, and an upstairs sun deck perfect for soaking in ocean views and sea breezes. Additional features include a circular driveway, garage, and generous outdoor space for entertaining or unwinding. This golf-cart-friendly, family-friendly neighborhood allows you to bike, walk, or run to the beach, grocery store, and some of Marathon's best restaurants, truly one of the most desirable areas in the Keys. Enjoy community events hosted at Sombrero Beach, including the renowned Fourth of July celebration and fireworks. This property has never been rented, though weekly vacation rentals are allowed. A rare offering in one of Marathon's most sought-after neighborhoods, where ocean views, privacy, and the island lifestyle come together effortlessly.
Single-familyProperty Type
1976Year Built
0.27 acresLot Size
$741Price/Sq.Ft.
4 spacesParking
Listed by Monica Barrett• Coldwell Banker Schmitt Real Estate Co.
Listed by Rick Servais• Coldwell Banker Schmitt Real Estate Co.
Est. $3,532 per month, based on comparable rentals
Sale and tax history for 42 Treasure Rd
Sale History
Tax History
Date
Event
Price
Public Records
May 18, 2026
Sold
$1,715,000
$741/sq ft
FLKMLS #618576
May 15, 2026
Listing Removed
—
May 14, 2026
Sold
$1,715,000
$741/sq ft
Apr 19, 2026
Contingent
—
Mar 18, 2026
Relisted
—
Mar 3, 2026
Contingent
—
Feb 25, 2026
Price Changed
$1,899,000
$821/sq ft
Feb 10, 2026
Listed
$1,999,000
$864/sq ft
FLKMLS #505292
Dec 11, 2001
Sold
$465,000
$201/sq ft
Jan 4, 2001
Listed
$499,000
$216/sq ft
OCEANVIEWS ON PRIVATE TREASURE ROAD. UNIQUE FLOOR PLAN - OVER 2900 SQ FT OF LIVING AREA. 2BD/2BA PLUS LIVING AND GALLEY KITCHEN UPSTAIRS. PRIVATE GUEST QUARTERS & REC ROOM DOWNSTAIRS. CONCRETE DOCK. LARGE SLIDING GLASS DOORS PROVIDE SPECTACULAR OCEAN VIEWS & FANTASTIC NATURAL LIGHTING. NICELY LANDSCAPED, PARTIALLY FENCED YARD. PAVED CIRCULAR ENTRNACE WAY. ALSO OFFERED WITH THE 2 ADJACENT VACANT WF LOTS $594,00. FOR THE PACKAGE.
FLKMLS #408486
Mar 31, 1998
Sold
$375,000
$162/sq ft
Dec 30, 1997
Listed
$398,000
$172/sq ft
OCEANVIEW ON PRIVATE TREASURE ROAD. CONCRETE DOCK. CHANNEL CURRENTLY BEING DREDGED OUT TO OPEN WATER DEPTH OF 4 FEET. UPSTAIRS: 2/3 KITCHEN (UPDATED), LIVING/DINING OVERLOOKING THE OCEAN. DOWN: 1 BED 1.5 BATHS, REC ROOM W/ POOL TABLE. INTERIOR STAIRS ARE INDICATIVE OF PERMITTED DOWNSTAIRS, ALTHOUGH OWNER (SINCE 86) HAS NO VERIFICATION.
Public Records
Apr 1, 1986
Sold
$250,000
$108/sq ft
Public Records
Sep 1, 1979
Sold
$165,000
$71/sq ft
Year
Property tax
Land + Additions
Assessment*
2025
$7,828 (−2.1%)
2024
$7,996 (+1.8%)
2023
$7,853 (+1.4%)
2022
$7,743 (−1.5%)
2021
$7,865 (−3.5%)
2020
$8,151 (+2.1%)
2019
$7,986 (+5.2%)
2018
$7,594 (+1.8%)
2017
$7,459 (−0.1%)
2015
$7,468 (−1.6%)
2014
$7,590
Public record
Public record
Zoning
Beds
3
Baths
2
Stories
2
Lot width
—
Lot depth
—
Lot size
0.51 Acres
Year renovated
2001
Sq. Ft.
2,313
Year built
1976
Style
Single Family Residential
County
Monroe County
APN
1566 32 00105210000000
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Jul 10, 2026.
RM
Residential Medium District
The RM District is intended to establish areas of low-to medium-density residential uses characterized principally by single-family detached and two-family dwellings, designated within the Residential Medium RM future land use category on the Future Land Use Map FLUM.
Exterior Features: Fencing, Storage, Privacy Wall/Fence, Lanai, Gutters, Fruit Tree(s)
Has Pool
Pool Is Heated
Pool Information: In Ground, Concrete
Pool Information: Dimensions: 15' x 30'
Porch/Balcony: Open Porch/Balcony, Deck, Patio
Shutters: Accordion, Roll Down Electric, Panel
Security
Patrolled Area
Property Features
On Waterfront
Waterfront Type: Oceanfront, Open Water, Canal Front
Waterview: Ocean View, Open Water View, Canal View
Property Information
Deed Restrictions: Unknown
Pets: Pets Allowed
Rentals Allowed: Yes
Min Rental Days: 7
Lot Information
Acres: 0.27
Zoning: RM - Residential Medium
Land Size: 1/4 - 1/2 Acre
Control Depth: 2
Flood Zone: AE 10
Building Information
Year Built: 1,976
Sq. Ft. Source: Property Data Card
Building Style: Ground Level
Building Style: Stories: 2
Building Style: Above Flood: No
Construction: CBS
Roof: Combo Roof
Subdivision/Neighborhood
Subdivision: Treasure Island (50.0)
Marathon Neighborhood: Sombrero
Financial
Tax Information
Taxes: $7,828.23
Tax Year: 2,025
Tax Exemptions: Homestead
Financial Information
Terms: Cash, Conventional
Utilities
Utility Information
Utilities: FKAA, Water Separate Meter, Cable Available, Elect Separate Meter, Buyer to Verify
Has Public Sewer Hook-up
Location
Homeowners Association Information
Association Info: 1st Right of Refusal: No
Association Info: Association Fee $: 0.00
Fee Includes: None
Location Information
Side: Ocean
Mile Marker: 50.00
Directions: From US 1 turn onto Sombrero Beach Rd. Take the road all the way down towards the beach, turn left at Treasure Rd. House will be the first home on your right side. Sign out front.
Neighborhood Features
Community Boat Ramp, Bike Paths, Airstrip, Other Area Features, Beach, Tennis Courts
Public facts
Beds: 3
Baths: 2.0
Sq. Ft.: 2,313
Stories: 2.0
Lot Size: 0.51 acres
Style: Single Family Residential
Year Built: 1976
Year Renovated: 2001
County: Monroe County
APN: 1566 32 00105210000000
Home facts updated by county records on Jul 10, 2026
Around this home
Schools
Stanley Switlik Elementary School
Public PreK-5 • Assigned • 1.6mi
5/10
Marathon School
Public 6-12 • Assigned • 0.8mi
5/10
Provided by GreatSchools
Climate risks
1/10 Flood Factor
Minimal risk 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
Heat Factor
We're working on getting current and accurate heat risk information for this home.
10/10 Wind Factor
99% chance of strong winds in next 30 years
1/10 Air Factor
0 unhealthy days expected this year, 0 days in 30 years
Provided by First Street
Historical weather
Marathon, FL • 33050
Average low and high temperatures (°F)
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Sun exposure
97/ 100
Exceptional sunlight
Sunscore
There appears to be minimal shading by surrounding buildings, terrain, and vegetation.
9.2 hrs
7.2 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$2.10M – $2.54M
Sell confidently with a local market expert in Marathon.