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858 SE Cavern Avenue, Port Saint Lucie, FL 34983

Single family property built in 1987 with 1,448 sq ft of living area on a 0.23-acre lot in Port Saint Lucie, St. Lucie 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
$288,300
County assessed value (tax roll)
$120,394
Living area
1,448 sq ft
Lot size
0.23 acres (10,000 sq ft)
Year built
1987
Land use
Single family
FEMA flood zone
Not on file yet
County
St. Lucie County, FL
Parcel ID
fl-66-3420-510-0491-000-3

At a glance

Who owns 858 SE Cavern Ave?
St. Lucie County property records list Riordan Richard J as the owner of record.
What is the county just value of 858 SE Cavern Ave?
$288,300 on the St. Lucie 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-66-3420-510-0491-000-3 (St. Lucie 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 SE Cavern Ave

All 53 properties on SE Cavern Ave · ZIP 34983 (Port Saint Lucie). Values are county just values (tax roll), not market values.

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Source: Florida Department of Revenue parcel roll; data refreshed Jun 30, 2026. Values are county tax-roll figures, not appraisals. How to read these values · Data sources