Sold
323 ONYX Avenue sold on April 19, 2013 for $1,249,000, 10.8% below the $1,400,000 asking price after 99 days on the market. The buyer financed the purchase with a conventional loan. The details are below for reference.
323 ONYX Avenue, Newport Beach, CA 92662
- 2 beds
- 1 bath
- 1,012 sq ft
- 2,550 sq ft lot
- Built 1930
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$1,249,000
Subdivision Balboa Island - Main Island
22 single-family homes sold in the past 12 months · median $5,187,500
The home
About 323 ONYX Avenue
Adorable Balboa Island wood shingled cottage with an apartment over the 2 car garage. Located just half a block from the Main street where you have restaurants and shops. It was originally built in 1930's with gorgeous hardwood floors, large picture windows, a wood burning stone fireplace (recently relined), the kitchen is open to the dining and living rooms and has been redone with butcher block counters and bar. The cottage has two bedrooms, and one full bath. French doors lend a charming touch leading from the living room outdoors to a sweet brick patio. The perfect setting for morning coffee and evening al fresco dining! The gas heat system is four years new and the spacious one bedroom one bath apartment and double garage behind the main house were added nine years ago. It's currently tenant occupied. Easy stroll to the bay.
Property details for 323 ONYX Avenue
This 2-bedroom, 1-bath single-family home sits in the Balboa Island - Main Island neighborhood of Newport Beach in Orange County. It has 1,012 square feet of living space on a 2,550-square-foot lot. The home was built in 1930. The MLS record lists the assessor parcel number as 050-141-31. Highlights include a fireplace, single-story living, a two-car garage, and cottage architecture.
Specifications
Home Details
General Features
- Property Type
- Single Family Residence
- MLS Number
- U12004874
- Year Built
- 1930
- Living Area (sq ft)
- 1,012
- Living Area Source
- Public Records
- Lot Size (sq ft)
- 2,550
- Lot Size (acres)
- 0.059
- Levels
- One
- Bedrooms
- 2
- Full Baths
- 1
- Garage Spaces
- 2
- Parking Spaces
- 2
- View
- None
- Parcel Number
- 05014131
- Listing Terms
- Standard
Interior Features
- Interior Features
- All Bedrooms Down
- Appliances
- Built In, Convection Oven, Cooktop, Dishwasher, Gas Cooking, Disposal, Oven, Range, Refrigerator
- Flooring
- Wood
- Heating
- Central
- Cooling
- None
- Common Walls
- No Common Walls
- Accessibility
- Accessible Doors
Exterior Features
- Architectural Style
- Cottage
- Roof
- See Remarks
- Patio and Porch
- Concrete
- Parking
- Door Single, Garage, Garage Door Opener, Garage Faces Rear
- Fencing
- Wood
- Pool Features
- None
- Spa
- None
- Sewer
- Sewer Tap Paid
- Water
- Public
- Utilities
- Sewer Available, Overhead Utilities
Community Features
- Subdivision
- Balboa Island - Main Island (BALM)
The record
Property History for 323 ONYX Avenue
| Date | Event | Price | Note |
|---|---|---|---|
| Apr 19, 2013 | Sold | $1,249,000 | |
| Jan 11, 2013 | Listed for sale | $1,400,000 |
No prior MLS sales on record for this home since 2012.
Added by Realatrends Real Estate
Flood, Fire and Earthquake Zones for 323 ONYX Avenue
We looked up this home's map point in public government maps. These facts are not part of the MLS listing.
Hazard and noise zones
- Flood zone
Zone X, 0.2 percent annual chance flood hazard. Outside FEMA's Special Flood Hazard Area.
FEMA National Flood Hazard Layer, FIRM panel 06059C0382K effective March 21, 2019. Checked October 15, 2026.
- Fire hazard severity zone
Not in a fire hazard severity zone on the State Fire Marshal's map.
CAL FIRE, State Fire Marshal map for Local Responsibility Areas, March 24, 2025. Checked October 15, 2026.
- Earthquake fault zone
Outside the Alquist-Priolo Earthquake Fault Zones.
California Geological Survey, Earthquake Fault Zones map, Newport Beach quadrangle, released July 1, 1986. Checked October 15, 2026.
- Liquefaction zone
Inside a Seismic Hazard Zone for liquefaction.
California Geological Survey, Seismic Hazard Zones map, Newport Beach quadrangle, released April 15, 1998. Checked October 15, 2026.
- Landslide zone
Outside the earthquake-induced landslide zones.
California Geological Survey, Seismic Hazard Zones map, Newport Beach quadrangle, released April 15, 1998. Checked October 15, 2026.
- Tsunami hazard area
Inside the Tsunami Hazard Area on the State's evacuation planning map.
California Geological Survey and Cal OES, Tsunami Hazard Area map for Orange County (2021). Checked October 15, 2026.
- Airport noise
Outside John Wayne Airport's 60 dB CNEL noise contour, 0.9 miles from it.
Airport Land Use Commission for Orange County, Airport Environs Land Use Plan noise contours. Checked October 15, 2026.
Internet and charging
- Fixed internet
Fiber: AT&T, up to 5,000 Mbps, at 36 of 36 residential locations in this census block. Cable: Spectrum, up to 1,000 Mbps, at 36 of 36. DSL: AT&T, up to 10 Mbps, at 1 of 36.
FCC National Broadband Map, provider-reported data as of December 31, 2025, for census block 060590630062027, not for this address. Not endorsed by the FCC. Checked October 15, 2026.
- EV charging
Nearest public charger 0.6 miles away (Tesla Destination, 2 Level 2 ports). 162 public charging ports within 3 miles.
U.S. Department of Energy, Alternative Fuels Data Center. Straight-line distance. Checked October 15, 2026.
These facts are for the listing's map point, which can sit off the lot. A zone line can also cross a lot, and agencies revise their maps. In cities, the fire zone line follows the State Fire Marshal's 2025 map; each city adopts its own map and may add areas. These lines are not a Natural Hazard Disclosure. Check the official maps and the seller's disclosures before you rely on them. Sources for the earthquake zone lines: Reproduced with permission, California Geological Survey, Webservice of Official Maps of Alquist-Priolo Earthquake Fault Zones (2025). Reproduced with permission, California Geological Survey, Webservice of Official Maps of Seismic Hazard Zones (2025).
Official maps
Next steps
Looking for something similar
323 ONYX Avenue is no longer on the market, but comparable homes come up in Newport Beach regularly. We can tell you what this one actually closed at and set up alerts for listings that match it.
Selling near 323 ONYX Avenue
Thinking of selling nearby? We bring current Balboa Island - Main Island sales data and a clear pricing strategy to every listing, backed by more than 700 closed sales and over $1B in Orange County volume. Start with a free home valuation, or reach out to talk through your options.
The neighborhood
About Newport Beach
Set along the Pacific in Orange County, Newport Beach surrounds Newport Harbor, where Balboa Island, Lido Isle, and the Balboa Peninsula frame one of California's largest recreational harbors. The city stretches from the Balboa and Newport piers to Corona del Mar and Fashion Island, within the Newport-Mesa Unified School District.
Balboa Island - Main Island home sales, past 12 months
- Homes sold
- 22
- Median price
- $5,187,500
- Median days on market
- 15
- Median per sq ft
- $2,501
Recorded MLS closings of single-family homes, Oct 31, 2025 to Oct 31, 2026. Days on market run from listing to going under contract.
Recent Balboa Island - Main Island sales
| Address | Closed | Price | Sq ft | Per sq ft | Days on market |
|---|---|---|---|---|---|
| 118 Sapphire | Oct 30, 2026 | $6,275,000 | 2,321 | $2,704 | 31 |
| 1207 N Bay Front | Oct 14, 2026 | $7,250,000 | 992 | $7,308 | 128 |
| 226 Opal | Oct 9, 2026 | $2,980,000 | 936 | $3,184 | 10 |
| 225 Diamond | Sep 29, 2026 | $7,585,000 | 2,312 | $3,281 | 43 |
| 325 Grand Canal | Sep 28, 2026 | $4,400,000 | 2,542 | $1,731 | 16 |
See 18 homes for sale in Balboa Island - Main Island Newport Beach housing market
Schools
School District for 323 ONYX Avenue
As listed in the MLS record. Confirm attendance boundaries with the school district.
The MLS record lists the school district as Newport Mesa Unified.
Living in Newport Beach covers its schools, parks and beaches.
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Listed by Laura Gale of Hom Sotheby's International Re
Listing information updated Apr 30, 2021 at 8:21 AM PT. Source: CRMLS.
This information is for your personal, non-commercial use and may not be used for any purpose other than to identify prospective properties you may be interested in purchasing. The display of MLS data is usually deemed reliable but is NOT guaranteed accurate by the MLS. Buyers are responsible for verifying the accuracy of all information and should investigate the data themselves or retain appropriate professionals. Information from sources other than the Listing Agent may have been included in the MLS data. Unless otherwise specified in writing, the Broker/Agent has not and will not verify any information obtained from other sources. The Broker/Agent providing the information contained herein may or may not have been the Listing and/or Selling Agent.