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1811 SEIDENBERG Avenue, Key West, FL 33040

Single family property built in 1958 with 1,437 sq ft of living area on a 0.13-acre lot in Key West, 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
$710,968
County assessed value (tax roll)
$197,676
Living area
1,437 sq ft
Lot size
0.13 acres (5,681 sq ft)
Year built
1958
Land use
Single family
FEMA flood zone
Not on file yet
County
Monroe County, FL
Parcel ID
fl-54-0568 25 00047160000000

At a glance

Who owns 1811 SEIDENBERG Ave?
Monroe County property records list CASS JAMES JOHN TRUST 5/30/201 as the owner of record.
What is the county just value of 1811 SEIDENBERG Ave?
$710,968 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-54-0568 25 00047160000000 (Monroe County).

Current owner

Owner contact info

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

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More on Seidenberg Ave

All 143 properties on Seidenberg Ave · ZIP 33040 (Key West). Values are county just values (tax roll), not market values.

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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