Sold
304 Diamond Avenue sold on October 31, 2023 for $4,125,000, 12.2% below the $4,699,000 asking price after 78 days on the market; it was first listed at $4,995,000. The details are below for reference.
304 Diamond Avenue, Newport Beach, CA 92662
- 6 beds
- 4 baths
- 3,273 sq ft
- 2,614 sq ft lot
- Built 1972
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$4,125,000
Subdivision Balboa Island - Main Island
22 single-family homes sold in the past 12 months · median $5,187,500
The home
About 304 Diamond Avenue
Located in the heart of Balboa Island just moments from the public dock, this property showcases ~3,300sf with 6 bedrooms, 4 bathrooms and provides the ideal beach lifestyle. Upon entrance, you are immediately welcomed into an aura of sophistication and refined finishes. The open-concept layout seamlessly connects the living room with fireplace, dining area, and gourmet kitchen, allowing for effortless entertaining. The large windows and skylights flood the rooms with natural light, highlighting the impeccable craftsmanship and attention to detail throughout. Upstairs the home features a separate living area and balcony overlooking the prestigious 300 block of Balboa Island. The primary suite is a private oasis, boasting a generous floor plan, a cozy fireplace, and a luxurious ensuite bathroom. With its spa-like features, including a soaking tub and a walk-in shower, the primary bath provides a sanctuary for relaxation and rejuvenation. Accompanying the second level are three additional en-suite bedrooms consisting of a personalized layout and design. The third level consists of a bonus room that can serve as a bedroom, office, or meditation studio. This room is a blank canvas and can be transformed to your personal desire. Not to be overlooked, the home also offered an attached 3-car garage. With its impeccable design, stunning surroundings, and luxurious amenities, this residence offers an extraordinary lifestyle for the most discerning homeowner.
Property details for 304 Diamond Avenue
This 6-bedroom, 4-bath single-family home sits in the Balboa Island - Main Island neighborhood of Newport Beach in Orange County. It has 3,273 square feet of living space on a 2,614-square-foot lot. The home was built in 1972. The MLS record lists the assessor parcel number as 050-083-12. Highlights include a fireplace, a gated community, a three-car garage, and Cape Cod architecture.
Specifications
Home Details
General Features
- Property Type
- Single Family Residence
- MLS Number
- 23289153
- Year Built
- 1972
- Living Area (sq ft)
- 3,273
- Living Area Source
- Other
- Lot Size (sq ft)
- 2,614
- Lot Size (acres)
- 0.06
- Levels
- Two
- Bedrooms
- 6
- Full Baths
- 3
- Half Baths
- 1
- Garage Spaces
- 3
- Parking Spaces
- 3
- View
- None
- Parcel Number
- 05008312
- On Market Date
- 2023-07-14
- Listing Terms
- Standard
Interior Features
- Interior Features
- Eat In Kitchen, Open Floorplan, Recessed Lighting, Dressing Area
- Appliances
- Built In, Dishwasher, Oven, Range, Refrigerator, Range Hood, Dryer, Washer
- Flooring
- Wood
- Heating
- Forced Air, Fireplaces
- Fireplace
- Family Room
- Laundry
- Inside, Laundry Room
- Common Walls
- No Common Walls
- Windows
- Skylights
- Furnished
- Unfurnished
Exterior Features
- Architectural Style
- Cape Cod
- Patio and Porch
- Deck
- Parking
- Door Multi, Garage, Private
- Pool Features
- None
- Spa
- None
- Sewer
- Other
Community Features
- Subdivision
- Balboa Island - Main Island
- Community Features
- Gated
- Association Amenities
- Trails
- Security
- Gated Community
The record
Property History for 304 Diamond Avenue
| Date | Event | Price | Note |
|---|---|---|---|
| Oct 31, 2023 | Sold | $4,125,000 | |
| Sep 2, 2023 | Price reduced | $4,699,000 | From $4,750,000 |
| Aug 14, 2023 | Price reduced | $4,750,000 | From $4,995,000 |
| Jul 14, 2023 | Status changed to Active | From Coming Soon | |
| Jul 14, 2023 | Listed for sale | $4,995,000 | |
| Nov 19, 2021 | Sold | $4,200,000 | Compass |
| Nov 1, 2013 | Sold | $2,500,000 | Abrams Coastal Properties |
Added by Realatrends Real Estate
Flood, Fire and Earthquake Zones for 304 Diamond 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 32 of 32 residential locations in this census block. Cable: Spectrum, up to 1,000 Mbps, at 32 of 32. Fixed wireless: Verizon, up to 300 Mbps, at 32 of 32.
FCC National Broadband Map, provider-reported data as of December 31, 2025, for census block 060590630061000, not for this address. Not endorsed by the FCC. Checked October 15, 2026.
- EV charging
Nearest public charger 0.7 miles away (Tesla Destination, 2 Level 2 ports). 160 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
304 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 304 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
- 22
- Median price
- $5,187,500
- Median days on market
- 15
- Median per sq ft
- $2,501
Recorded MLS closings of single-family homes, Nov 2, 2025 to Nov 2, 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 304 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 Joshua Altman of Douglas Elliman of California, Inc.
Listing information updated Nov 1, 2023 at 10:51 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.