$3,490,000
3Beds3Baths1,633SqFt
121 Marine AvenueNewport Beach, CA 92662Balboa Island - Main Island
Sold
327 Onyx sold on August 18, 2026 for $3,450,000, 9.2% below the $3,799,900 asking price after 102 days on the market; it was first listed at $4,500,000. The buyer paid cash. The details are below for reference.
327 Onyx, Newport Beach, CA 92662
$3,450,000
- Beds
- 5
- Baths
- 2
- Sq Ft
- 2,128
- Per Sq Ft
- $1,621
- Sq Ft Lot
- 3,402
- Built
- 1938
- Garage
- 2-car
Call Clark Smith (949) 494-8830
Subdivision Balboa Island - Main Island
22 single-family homes sold in the past 12 months · median $3,670,000
About 327 Onyx
Welcome to 327 Onyx Avenue, Balboa Island, this vintage stream line mid-century modern beach house has a great location steps from the—just steps to the North Bayfront. Water views on both levels.
Located on a rare find 40 foot lot. A 40 feet wide lot offers significantly more space, light and private parking (a coveted premium on the Island). Currently offers parking behind the garage and a spot alongside the garage. Easy access to the home with alley access off Marine Dr. just over the Bridge.
This Balboa Island mid-century beach house takes advantage of its position, with views toward the Bay and a constant reminder of how close you are to the water. It’s an easy access to the Shoreline, Marine Avenue shopping, Dining and fun. Balboa is everything that makes Newport Beach what it is—but far enough removed to feel quiet and livable.
First time on the market in over 60 years is now available for a new beginning! A rare find indeed. Properties like this don’t come up often.
Property details for 327 Onyx
This 5-bedroom, 2-bath single-family home sits in the Balboa Island - Main Island neighborhood of Newport Beach in Orange County. It offers 2,128 square feet of living space. The home was built in 1938. The MLS record lists the assessor parcel number as 050-141-33. Highlights include bay views, a fireplace, a two-car garage, a 3,402-square-foot lot, and mid-century modern architecture. The detail sections on this page cover interior and exterior features, estimated taxes, HOA dues where they apply, and the map location.
Home Details
- Price
- $3,450,000
- Days On Site
- N/A
- Bedrooms
- 5
- Inside Area (SqFt)
- 2,128 sqft
- Total Baths
- 2
- Full Baths
- 2
- Partial Baths
- N/A
- Lot Size
- 3,402 SqFt
- Year Built
- 1938
- MLS® Number
- NP26074825
- Status
- Sold
- Property Tax
- N/A
- HOA/Condo/Coop Fees
- N/A
- Sq Ft Source
- Assessor
General Features
- Property Type
- Single Family Residence
- MLS Number
- NP26074825
- Year Built
- 1938
- Living Area (sq ft)
- 2,128
- Living Area Source
- Assessor
- Lot Size (sq ft)
- 3,400
- Lot Size (acres)
- 0.0781
- Levels
- Two
- Bedrooms
- 5
- Full Baths
- 2
- Garage Spaces
- 2
- Parking Spaces
- 3
- View
- Bay
- Parcel Number
- 05014133
- On Market Date
- 2026-04-22
- Listing Terms
- Standard
Interior Features
- Interior Features
- Bedroom On Main Level, Main Level Primary
- Flooring
- Carpet, Tile
- Heating
- Central
- Cooling
- None
- Fireplace
- Living Room
- Laundry
- Inside
- Main Level Bedrooms
- 1
- Main Level Bathrooms
- 1
- Entry Level
- 1
- Common Walls
- No Common Walls
Exterior Features
- Architectural Style
- Mid Century Modern
- Roof
- Flat
- Foundation
- Slab
- Lot Features
- Level
- Patio and Porch
- Covered
- Parking
- Door Multi, Garage, On Site, One Space
- Pool Features
- None
- Spa
- None
- Sewer
- Public Sewer
- Water
- Public
- Utilities
- Electricity Connected, Natural Gas Connected
- Units
- 1
Community Features
- Subdivision
- Balboa Island - Main Island (BALM)
- Community Features
- Suburban
Property History for 327 Onyx
| Date | Event | Price | Note |
|---|---|---|---|
| Aug 18, 2026 | Sold | $3,450,000 | |
| Apr 22, 2026 | Listed for sale | $4,500,000 |
No prior MLS sales on record for this home since 2012.
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
22Homes sold
$3,670,000Median price
13Median days on market
$2,297Median per sq ft
Recorded MLS closings of single-family homes, Sep 20, 2025 to Sep 20, 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 |
|---|---|---|---|---|---|
| 206 Agate | Aug 31, 2026 | $2,860,000 | 888 | $3,221 | 4 |
| 327 Onyx | Aug 18, 2026 | $3,450,000 | 2,128 | $1,621 | 102 |
| 209 Ruby | Jul 14, 2026 | $3,295,000 | 1,793 | $1,838 | 1 |
| 215 Opal | Jun 30, 2026 | $3,437,500 | 2,226 | $1,544 | 79 |
| 122 Collins Avenue | May 18, 2026 | $3,270,000 | 2,551 | $1,282 | 0 |
School District for 327 Onyx
As listed in the MLS record. Confirm attendance boundaries with the school district.
The MLS record lists the Newport Mesa Unified.
Living in Newport Beach covers its schools, parks and beaches.
Looking for something similar
327 Onyx 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.
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Selling near 327 Onyx
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.
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Listed by Brian Gibney of Coldwell Banker Realty
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.
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