866 Sea Dune Lane, Marco Island, FL 34145

Single family property built in 2003 with 17,340 sq ft of living area on a 0.29-acre lot in Marco Island, 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

$3,630,497

County assessed value (tax roll)

$3,630,497

Living area

17,340 sq ft

Lot size

0.29 acres (12,847 sq ft)

Year built

2003

Land use

Single family

FEMA flood zone

Not on file yet

County

Collier County, FL

Parcel ID

fl-21-50033240007

At a glance

Who owns 866 Sea Dune Ln?: Collier County property records list SUNNY BAY TRUST as the owner of record.
What is the county just value of 866 Sea Dune Ln?: $3,630,497 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-21-50033240007 (Collier County).

Current owner

SUNNY BAY TRUST

Owner contact info

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

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Nearby properties

870 Sea Dune Ln, Marco Island $8.9M · built 2019
876 Sea Dune Ln, Marco Island $7.7M · built 2003
875 Sea Dune Ln, Marco Island $1.1M
781 Waterside Dr, Marco Island $100
905 Hideaway Cir E, Marco Island $160 · built 1987
165 Beach Dr, Marco Island $3.3M · built 1996
760 Waterside Dr, Marco Island $1.9M · built 2006
761 Waterside Dr, Marco Island $854K

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Source: Florida Department of Revenue parcel roll; data refreshed Jun 24, 2026. Values are county tax-roll figures, not appraisals. How to read these values · Data sources