865 Sea Dune Lane, Marco Island, FL 34145
Single family property built in 2020 with 20,742 sq ft of living area on a 0.73-acre lot in Marco Island, Collier County. Facts below come from the county property appraiser's public record.
County just value (tax roll) — not a market value
$5,194,056
County assessed value (tax roll)
$5,194,056
Living area
20,742 sq ft
Lot size
0.73 acres (31,996 sq ft)
Year built
2020
Land use
Single family
FEMA flood zone
Not on file yet
County
Collier County, FL
Parcel ID
fl-21-50033480003
At a glance
- Who owns 865 Sea Dune Ln?
- Collier County property records list COSGROVE, DANIEL W as the owner of record.
- What is the county just value of 865 Sea Dune Ln?
- $5,194,056 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-21-50033480003 (Collier County).
Current owner
- COSGROVE, DANIEL W
Owner contact info
Phones, emails and mailing addresses from public Florida records are available to members.
See plansMore on Sea Dune Ln
- 856 Sea Dune Ln $5.7M
- 860 Sea Dune Ln $3.4M · built 1992
- 866 Sea Dune Ln $3.6M · built 2003
- 870 Sea Dune Ln $8.9M · built 2019
- 871 Sea Dune Ln $1.9M · built 1993
- 875 Sea Dune Ln $1.1M
- 876 Sea Dune Ln $7.7M · built 2003
- 880 Sea Dune Ln $3.5M · built 2001
- 886 Sea Dune Ln $5M · built 1987
All 10 properties on Sea Dune Ln · ZIP 34145 (Marco Island). 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