Sold
121 Diamond Avenue sold on February 1, 2024 for $3,350,000, 8.1% above the $3,100,000 asking price after 16 days on the market. The buyer paid cash. The details are below for reference.
121 Diamond Avenue, Newport Beach, CA 92662
- 3 beds
- 4 baths
- 2,000 sq ft
- Built 1977
Own 121 Diamond Avenue? Request a free home valuation to see what it is worth today.
$3,350,000
Subdivision Balboa Island - Main Island
14 duplexes sold in the past 12 months · median $3,764,855
This home has a newer listing: MLS OC23212839 (Sold).
The home
About 121 Diamond Avenue
121 Diamond presents today's buyers with various options. The existing duplex could be remodeled and enjoyed for many years to come with either a modest budget or a high end budget. The existing front main home features 2 bedrooms and 2.5 bathrooms, but could be easily converted to a 3 bedroom main home. The rear 1 bedroom unit sits above the 2 car garage and separate parking space facing the rear alley. One could potentially convert the two units into one single family home with 4 or even 5 bedrooms without adding square footage. Alternatively, many buyers are looking for a special lot to tear down the existing building to create the Balboa island home of their dreams from the ground up. Whatever you decide to do with it, you'll love this wonderful location just down the block from the water. Homes in this price point sell instantly, so you'll want to see this one right away. According to City of Newport Beach website: Short-Term Lodging is allowed subject to zoning compliance, but there is not currently an active permit.
Both the main home, and the 1 bedroom apartment have fantastic old Newport character and charm, with high vaulted ceilings on the second level.
Property details for 121 Diamond Avenue
This 3-bedroom, 4-bath duplex sits in the Balboa Island - Main Island neighborhood of Newport Beach in Orange County. It has 2,000 square feet of living space. The home was built in 1977. The MLS record lists the assessor parcel number as 050-102-21. Highlights include a fireplace, single-story living, an attached two-car garage, and Cape Cod architecture.
Specifications
Home Details
General Features
- Property Type
- Duplex
- MLS Number
- OC23212713
- Year Built
- 1977
- Living Area (sq ft)
- 2,000
- Living Area Source
- Estimated
- Lot Size (sq ft)
- 2,614
- Lot Size (acres)
- 0.06
- Levels
- One
- Bedrooms
- 3
- Full Baths
- 3
- Half Baths
- 1
- Garage Spaces
- 2
- Parking Spaces
- 3
- View
- Peek A Boo
- Parcel Number
- 05010221
- On Market Date
- 2023-11-16
- Listing Terms
- Trust
Interior Features
- Interior Features
- Breakfast Area, Ceiling Fans, Cathedral Ceilings, Separate Formal Dining Room, Granite Counters, Multiple Staircases, Sunken Living Room, Unfurnished, All Bedrooms Up, Primary Suite, Walk In Closets
- Appliances
- Electric Cooktop, Electric Oven, Gas Cooktop, Gas Water Heater, Water Heater
- Flooring
- Carpet, Vinyl
- Heating
- Forced Air
- Cooling
- None
- Fireplace
- Kitchen, Living Room, Primary Bedroom
- Laundry
- In Garage
- Main Level Bathrooms
- 1
- Entry Level
- 1
- Common Walls
- No Common Walls
- Windows
- Bay Windows
- Doors
- French Doors
- Accessibility
- None
Exterior Features
- Architectural Style
- Cape Cod, Cottage, Traditional
- Roof
- Flat, Shake
- Construction
- Stucco, Wood Siding
- Foundation
- Slab
- Lot Features
- Level, Rectangular Lot, Street Level, Value In Land, Walkstreet
- Patio and Porch
- Brick, Concrete
- Parking
- Garage, No Driveway, Garage Faces Rear
- Fencing
- Average Condition
- Pool Features
- None
- Spa
- None
- Sewer
- Public Sewer
- Water
- Public
- Utilities
- Cable Available, Electricity Connected, Natural Gas Connected, Phone Available, Sewer Connected, Water Connected
- Condition
- Fixer
- Faces
- West
- Units
- 2
Community Features
- Subdivision
- Balboa Island - Main Island (BALM)
- Community Features
- Biking, Curbs, Fishing, Gutters, Street Lights, Sidewalks, Water Sports, Marina
- Security
- Carbon Monoxide Detectors, Smoke Detectors
The record
Property History for 121 Diamond Avenue
| Date | Event | Price | Note |
|---|---|---|---|
| Feb 1, 2024 | Sold | $3,350,000 | |
| Dec 8, 2023 | Status changed to Pending | From Active Under Contract | |
| Dec 2, 2023 | Status changed to Active Under Contract | From Active | |
| Nov 16, 2023 | Listed for sale | $3,100,000 |
Added by Realatrends Real Estate
Flood, Fire and Earthquake Zones for 121 Diamond Avenue
We looked up this home's map point in public government maps. These facts are not part of the MLS listing.
Hazard 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.
Internet and charging
- Fixed internet
Fiber: AT&T, up to 1,000 Mbps, at 25 of 25 residential locations in this census block. Cable: Spectrum, up to 1,000 Mbps, at 25 of 25. DSL: AT&T, up to 10 Mbps, at 1 of 25.
FCC National Broadband Map, provider-reported data as of December 31, 2025, for census block 060590630061015, not for this address. Not endorsed by the FCC. Checked October 15, 2026.
- EV charging
Nearest public charger 0.8 miles away (Tesla Destination, 2 Level 2 ports). 158 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
121 Diamond 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 121 Diamond 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
- 14
- Median price
- $3,764,855
- Median days on market
- 60
- Median per sq ft
- $1,662
Recorded MLS closings of duplexes, Nov 4, 2025 to Nov 4, 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 |
|---|---|---|---|---|---|
| 224 Amethyst | Sep 29, 2026 | $3,736,710 | 2,805 | $1,332 | 115 |
| 118 Emerald | Aug 20, 2026 | $3,350,000 | 1,893 | $1,770 | 79 |
| 1403 N Bayfront | Aug 3, 2026 | $5,600,000 | 2,105 | $2,660 | 27 |
| 216 Amethyst | Jul 30, 2026 | $3,180,000 | 2,363 | $1,346 | 147 |
| 302 S Bay Front | Jun 25, 2026 | $7,105,000 | 2,926 | $2,428 | 60 |
See 18 homes for sale in Balboa Island - Main Island Newport Beach housing market
Schools
School District for 121 Diamond 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 Michael Bojorquez of Keller Williams OC Coastal Realty
Listing information updated Feb 2, 2024 at 10:36 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.