400 123RD St GULF, Marathon, FL 33050

Single family property built in 2003 with 1,296 sq ft of living area on a 0.23-acre lot in Marathon, Monroe County. Facts below come from the county property appraiser's public record.

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County just value (tax roll) — not a market value

$543,665

County assessed value (tax roll)

$141,959

Living area

1,296 sq ft

Lot size

0.23 acres (10,000 sq ft)

Year built

2003

Land use

Single family

FEMA flood zone

Not on file yet

County

Monroe County, FL

Parcel ID

fl-54-0566 33 00100550000102

At a glance

Who owns 400 123RD St GULF?: Monroe County property records list CHACON JUSTO as the owner of record.
What is the county just value of 400 123RD St GULF?: $543,665 on the Monroe County tax roll (as of January 1). Just value is the property appraiser's figure for property taxes — not a market value.
What is the parcel ID?: fl-54-0566 33 00100550000102 (Monroe County).

Current owner

CHACON JUSTO

Owner contact info

Phones, emails and mailing addresses from public Florida records are available to members.

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Nearby properties

403 124TH St GULF, Marathon $495K · built 1965
503 124TH St GULF, Marathon $480K · built 1963
500 123RD St GULF, Marathon $648K · built 1989
303 124TH St GULF, Marathon $477K · built 1963
300 123RD St GULF, Marathon $693K · built 1974
603 124TH St GULF, Marathon $480K · built 1971
501 123RD St GULF, Marathon $648K · built 1974
12300 OVERSEAS Hwy, Marathon $1.2M · built 1994

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Source: Florida Department of Revenue parcel roll; data refreshed Jun 25, 2026. Values are county tax-roll figures, not appraisals. How to read these values · Data sources