521 Riverside Ave is a 1,318 square foot house on a 6,375 square foot lot with 3 bedrooms and 1 bathroom. Based on Redfin's Newport Beach data, we estimate the home's value is $3,213,713.
Single-familyProperty Type
2000Year Built
6,375 sq ftLot Size
$2,438Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$3,213,713
$190K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 15.8% higher than the average sale price ($2.77M) of 6 comparable homes.
As the MLS and public records start to fill up, we'll list the details here.
Year
Property tax
Land + Additions
Assessment*
2025
$1,192 (+2.2%)
$39,041 + $35,935
$74,976
2024
$1,167 (+2.8%)
$39,041 + $35,935
$74,976
2023
$1,136 (+2.1%)
$38,275 + $35,231
$73,506
2022
$1,112 (+1.7%)
$37,524 + $34,541
$72,065
2021
$1,093 (+1.0%)
$36,788 + $33,864
$70,652
2020
$1,082 (+1.4%)
$36,067 + $33,200
$69,267
2019
$1,067 (+1.8%)
$35,697 + $32,860
$68,557
2018
$1,048 (+1.7%)
$34,997 + $32,216
$67,213
2017
$1,031 (+1.9%)
$33,638 + $30,966
$64,604
2016
$1,012 (+1.2%)
$33,638 + $30,966
$64,604
2015
$1,000 (+2.4%)
$32,979 + $30,359
$63,338
2014
$977 (+1.1%)
$31,847 + $29,318
$61,165
2013
$967 (+3.5%)
$31,847 + $29,318
$61,165
2012
$934 (+4.5%)
$31,703 + $29,186
$60,889
2011
$894 (+3.2%)
$31,082 + $28,614
$59,696
2010
$866 (+2.6%)
$30,473 + $28,053
$58,526
2009
$844 (+14.4%)
$30,245 + $27,844
$58,089
2008
$738
$30,317 + $27,911
$58,228
Tax history for 521 Riverside Ave
Year
Property tax
Land + Additions
Assessment*
2025
$1,192 (+2.2%)
$39,041 + $35,935
$74,976
2024
$1,167 (+2.8%)
$39,041 + $35,935
$74,976
2023
$1,136 (+2.1%)
$38,275 + $35,231
$73,506
2022
$1,112 (+1.7%)
$37,524 + $34,541
$72,065
2021
$1,093 (+1.0%)
$36,788 + $33,864
$70,652
2020
$1,082 (+1.4%)
$36,067 + $33,200
$69,267
2019
$1,067 (+1.8%)
$35,697 + $32,860
$68,557
2018
$1,048 (+1.7%)
$34,997 + $32,216
$67,213
2017
$1,031 (+1.9%)
$33,638 + $30,966
$64,604
2016
$1,012 (+1.2%)
$33,638 + $30,966
$64,604
2015
$1,000 (+2.4%)
$32,979 + $30,359
$63,338
2014
$977 (+1.1%)
$31,847 + $29,318
$61,165
2013
$967 (+3.5%)
$31,847 + $29,318
$61,165
2012
$934 (+4.5%)
$31,703 + $29,186
$60,889
2011
$894 (+3.2%)
$31,082 + $28,614
$59,696
2010
$866 (+2.6%)
$30,473 + $28,053
$58,526
2009
$844 (+14.4%)
$30,245 + $27,844
$58,089
2008
$738
$30,317 + $27,911
$58,228
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning
R-1
Single-Unit Residential District
The R-1 zoning district is intended to provide for areas appropriate for a range of detached single-family residential dwelling units, each located on a single legal lot, and does not include condominiums or cooperative housing.
Permitted uses
Include but are not limited to:
Livestock production
Day care facility
Housing-Single unit
Housing-Senior
Infrastructure
Property details
Interior
Bathroom Information
# of Full Baths: 1
Exterior
Exterior Information
Building Type: Single Family
Property Information
Subdivision Name: NEWPORT HEIGHTS ADD 01
Living Sq. Ft: 1,318
Building Sq. Ft: 1,318
Legal Description: A-TRACT: FIRST ADD TO NEWPORT HEIGHTS BLOCK: 34 LOT: 19 TR 256
Parking & Garage Information
Garage/Parking Sq. Ft: 400
Lot Information
# of Buildings: 1
Land Sq. Ft: 6,375
Legal Lot Number: 19
Legal Block Number: 34
Acres: 0.1463
Depth Footage: 127
Front Footage: 50
County Use Description: SINGLE FAM RESIDENCE
Financial
Assessor Information
Assessment Year: 2025
Public facts
Beds: 3
Baths: 1.0
Sq. Ft.: 1,318
Stories: —
Lot Size: 6,375 square feet
Style: Single Family Residential
Year Built: 2000
Year Renovated: —
County: Orange County
APN: 04903216
Home facts updated by county records on Jul 22, 2026
Around this home
Schools
Newport Heights Elementary School
Public K-6 • Assigned • 0.2mi
10/10
Horace Ensign Intermediate School
Public 7-8 • Assigned • 0.4mi
9/10
Newport Harbor High School
Public 9-12 • Assigned • 0.4mi
9/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Local insights from Redfin agents
Newport Beach is renowned for its stunning coastline, world-class harbor, luxury lifestyle, and vibrant waterfront community. With beautiful beaches, premier shopping and dining, top-rated schools, and year-round outdoor recreation, it offers an...