Sold
307 Diamond sold on September 13, 2023 for $3,260,000, 5.2% above the $3,100,000 asking price after 7 days on the market. The buyer paid cash. The details are below for reference.
307 Diamond, Newport Beach, CA 92662
- 3 beds
- 4 baths
- 2,003 sq ft
- Built 1930
Own 307 Diamond? Request a free home valuation to see what it is worth today.
$3,260,000
Subdivision Balboa Island - Main Island
14 duplexes sold in the past 12 months · median $3,764,855
The home
About 307 Diamond
Cottage Charisma…Charm at First Sight! Cherished by One Family for 47 Years! Exceptional Curb Appeal! 2 Bedroom, Den, 2 Bath, 2 Story Cottage Home. Spacious 1 Bedroom, 1 Bath Apartment. Bonus Room & Bath. Front Cottage, First Level: New Custom Picket Fence & Cement & Brick Ribbon Patio w/ Generous Room for Patio Furniture & Accessories • Brick Steps up to Dutch Door Entry • Spacious Living Room w/Vaulted Wood Beam Ceiling Showcasing Second-Story Balcony • Painted Brick Fireplace w/Wood-detailed Mantel • Original Hardwood Floors • Staircase w/White Wood Balustrade Leads to Viewing Balcony & Second Level Bedrooms • Light & Bright Kitchen w/Recessed Lighting, New Quartz Counter Tops, Butcher Block Cook Area, Farm Sink, Generous Cupboard Space, Bank of Pantry Cupboards Opening to Breakfast Area • Den w/ Hardwood Floors, Built-in Bookcase w/Cabinets, Clothes Closet • Dining Area off Den Opens through Sliding French Doors to Brick Garden Patio • Beautifully Remodeled ¾ Bath w/New Custom Tile Shower, Vanity, Decorative Shelving, Enter Bath from Den or Breakfast Room • Custom Lighting & Plumbing Fixtures throughout
Front Cottage, Second Level: Staircase from First Level Accesses Second Level Balcony w/Dramatic View of Downstairs Living Area • Two Light and Airy Upstairs Bedrooms w/ Vaulted Ceilings • Newly Remodeled Full Bath w/Exquisite Custom Tile Work in Tub/Shower, Vanity w/Quartz Countertop, Quality Lighting & Plumbing Fixtures. 1 Bedroom Apartment: Private Staircase to Bright, Cheery Second Level Apartment •Spacious, Privately Enclosed Balcony Patio • Dutch Door Entry to Generous Living Room w/Vintage Beadboard Walls & Ceilings •Beadboard Continues into Bedroom • Bedroom Suite Has Full Bath with Recently Refreshed Tub/Shower • Clever Kitchen w/Generous Countertops & Cupboards • Separate Door from Kitchen to Balcony for Outdoor Entertaining. 2 Car Garage: New Epoxy Floors • Bank of Storage Cabinets w/Washer/Dryer Hookups Below • Fresh Drywall • Automatic Garage Door w/ Window Lites • Dutch Door from Garage Opens to Brick Garden Patio. Bonus Room and ¾ Bath adjacent to Garage. Enjoy the Wide-Open Beaches of Diamond Street & the Famed Adjacent Ruby Street Beach w/ Floating Dock & Swim Line.
Property details for 307 Diamond
This 3-bedroom, 4-bath duplex sits in the Balboa Island - Main Island neighborhood of Newport Beach in Orange County. It has 2,003 square feet of living space. The home was built in 1930. The MLS record lists the assessor parcel number as 050-082-15. Highlights include a fireplace, a two-car garage, an updated home, and cottage architecture.
Specifications
Home Details
General Features
- Property Type
- Duplex
- MLS Number
- NP23147324
- Year Built
- 1930
- Living Area (sq ft)
- 2,003
- Living Area Source
- Measured
- Lot Size (sq ft)
- 2,550
- Lot Size (acres)
- 0.0585
- Levels
- Two
- Bedrooms
- 3
- Full Baths
- 2
- Garage Spaces
- 2
- Parking Spaces
- 2
- View
- None
- Parcel Number
- 05008215
- On Market Date
- 2023-08-08
- Listing Terms
- Standard, Trust
Interior Features
- Interior Features
- Beamed Ceilings, Cathedral Ceilings, Quartz Counters, Recessed Lighting, Storage
- Appliances
- Double Oven, Dishwasher, Gas Cooktop
- Flooring
- Carpet, Vinyl, Wood
- Heating
- Forced Air, Wall Furnace
- Cooling
- None
- Fireplace
- Gas Starter, Living Room
- Laundry
- Gas Dryer Hookup, In Garage
- Main Level Bathrooms
- 2
- Entry Level
- 1
- Common Walls
- No Common Walls
Exterior Features
- Architectural Style
- Cottage
- Exterior Features
- Rain Gutters
- Construction
- Wood Siding
- Foundation
- Raised
- Lot Features
- Rectangular Lot
- Patio and Porch
- Brick, Concrete, Deck, Patio
- Parking
- Garage, Garage Door Opener, Garage Faces Rear
- Fencing
- Wood
- Pool Features
- None
- Spa
- None
- Sewer
- Public Sewer
- Water
- Public
- Utilities
- Electricity Connected, Natural Gas Connected, Sewer Connected, Water Connected
- Condition
- Updated Remodeled
- Units
- 2
Community Features
- Subdivision
- Balboa Island - Main Island (BALM)
- Community Features
- Curbs, Gutters, Park, Storm Drains, Street Lights, Suburban, Sidewalks, Water Sports
The record
Property History for 307 Diamond
| Date | Event | Price | Note |
|---|---|---|---|
| Sep 13, 2023 | Sold | $3,260,000 | |
| Aug 30, 2023 | Status changed to Pending | From Active Under Contract | |
| Aug 15, 2023 | Status changed to Active Under Contract | From Active | |
| Aug 8, 2023 | Listed for sale | $3,100,000 |
No prior MLS sales on record for this home since 2012.
Added by Realatrends Real Estate
Flood, Fire and Earthquake Zones for 307 Diamond
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 AO, inside 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 30 of 30 residential locations in this census block. Cable: Spectrum, up to 1,000 Mbps, at 30 of 30. Fixed wireless: Verizon, up to 300 Mbps, at 30 of 30.
FCC National Broadband Map, provider-reported data as of December 31, 2025, for census block 060590630061001, 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
307 Diamond 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 307 Diamond
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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
Schools for 307 Diamond
As listed in the MLS record. Confirm attendance boundaries with the school district.
- Elementary
- Lincoln
- Middle
- Corona Del Mar
- High
- Corona Del Mar
- District
- Newport Mesa Unified
Living in Newport Beach covers its schools, parks and beaches.
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Listed by Mary Hardesty of Mary Hardesty Realty
Listing information updated Sep 13, 2023 at 11:25 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.