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643 18th Avenue S, Naples, FL 34102

Vacant residential property on a 0.31-acre lot in Naples, Collier 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
$3,580,680
County assessed value (tax roll)
$3,580,680
Lot size
0.31 acres (13,512 sq ft)
Land use
Vacant residential
FEMA flood zone
Not on file yet
County
Collier County, FL
Parcel ID
fl-21-01782680006

At a glance

Who owns 643 18th Ave S?
Collier County property records list MARSH III, JAMES R & KELLY D as the owner of record.
What is the county just value of 643 18th Ave S?
$3,580,680 on the Collier 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-21-01782680006 (Collier 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 18th Ave S

All 40 properties on 18th Ave S · ZIP 34102 (Naples). Values are county just values (tax roll), not market values.

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Source: Florida Department of Revenue parcel roll; data refreshed Jun 23, 2026. Values are county tax-roll figures, not appraisals. How to read these values · Data sources