421 21st Avenue S, Naples, FL 34102
Single family property built in 1999 with 11,480 sq ft of living area on a 0.34-acre lot in Naples, Collier County. Facts below come from the county property appraiser's public record.
County just value (tax roll) — not a market value
$7,772,325
County assessed value (tax roll)
$7,772,325
Living area
11,480 sq ft
Lot size
0.34 acres (15,000 sq ft)
Year built
1999
Land use
Single family
FEMA flood zone
Not on file yet
County
Collier County, FL
Parcel ID
fl-21-01881320005
At a glance
- Who owns 421 21st Ave S?
- Collier County property records list MACDONALD, ROBERT J as the owner of record.
- What is the county just value of 421 21st Ave S?
- $7,772,325 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-21-01881320005 (Collier County).
Current owner
- MACDONALD, ROBERT J
Owner contact info
Phones, emails and mailing addresses from public Florida records are available to members.
See plansMore on 21st Ave S
- 255 21st Ave S $9.5M · built 2023
- 305 21st Ave S $14.4M · built 2018
- 351 21st Ave S $5.5M · built 1995
- 375 21st Ave S $11.9M · built 2024
- 395 21st Ave S $4M
- 451 21st Ave S $11.3M · built 2010
- 481 21st Ave S $11.5M · built 2017
- 505 21st Ave S $12.9M · built 2021
- 512 21st Ave S $8.7M · built 2007
- 515 21st Ave S $4.9M · built 1971
- 518 21st Ave S $8.6M · built 2021
- 531 21st Ave S $7.6M · built 1999
- 550 21st Ave S $6.5M · built 2001
- 567 21st Ave S $7.5M · built 1999
- 575 21st Ave S $8.3M · built 2002
All 33 properties on 21st Ave S · ZIP 34102 (Naples). Values are county just values (tax roll), not market values.
Explore the area
Search this address on listing sites
These links open the listing site directly; we don't copy their data.
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