Discover a rare opportunity to create four executive estates in one of Napa's most desirable locations. This 4+ acre parcel, situated on the east side of Westwood Hills at 155 Riordan Lane, offers sweeping views of Downtown Napa, the surrounding eastern hills, and the picturesque valley beyond. Just minutes from downtown! The property is being offered with a lot line adjustment at close of escrow, with the intent to create four approximately one-acre residential lots. The seller will retain a portion of the property as part of the lot split. The lot line adjustment will take place at the final map stage. With city services available on the property and an exceptional location just minutes from downtown Napa, shopping, dining, and world-class wineries, this property presents an outstanding opportunity for developers, builders, or those seeking to create a private enclave of luxury custom homes. Bring your vision and capitalize on the scarcity of large residential parcels in this sought-after neighborhood. Panoramic views, generous homesites, and close proximity to urban conveniences combine to make this a truly one-of-a-kind offering.
Vacant landProperty Type
4.22 acresLot Size
$473,934Price/Acres
$65/moHOA Dues
Listed by Jenny Gass•DRE #02021302• Coldwell Banker Brokers of the Valley
•707-307-3866 (agent)
•jgass@cbnapavalley.com (agent)
Listed by Jeffrey Sickler•DRE #02025866• Coldwell Banker Brokers of the Valley
Westwood, located between Trancas Street and Redwood Road, is a residential and hillside Napa neighborhood with curving streets and vineyard-edge views. The neighborhood’s character concentrates around the Trancas Street corridor near Redwood Road, where local markets, coffee counters, and everyday errands set a steady rhythm. Northwood Market, Ranch Market Too, and the Napa Valley Performing Arts Center at Lincoln Theater act as familiar community touchpoints. Homes range from mid-century ranches to newer builds, often with larger lots and mature trees. Foothill trails and open-space edges shape an outdoors-forward routine. The setting feels removed from downtown’s tasting-room bustle while still tied to Napa’s north-side commercial spine.
Provided by Walk Score and Local Logic
Property details
Exterior
Finance
Exterior features
Barbed wire fencing
Dead-end access
See remarks for additional lot details
No horse-keeping allowed
Home design
Land property (residential lot)
Residential zoning
Utilities
Water connected
Public sewer
Electric service available
Cable available
Phone service available
HOA & community
Monthly HOA managed by Modern Community Management ($65/month)
Association fees include other services (see association for details)
Electricity and solar
View estimated energy costs and solar savings for this home
As the MLS and public records start to fill up, we'll list the details here.
Public record
Public record
Zoning
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Style
Vacant Land
County
Napa County
APN
043-570-022-000
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Last updated by owner on Jun 18, 2026.
RS 40
Single-Family Residential District
This district implements the single-family residential category of the General Plan and applies to areas intended to develop into a single-family detached unit pattern. RS areas typically include custom home subdivisions on hillsides or constrained sites, and post war tract subdivisions, which usually have uniform platting patterns, setbacks and building types. This district provides opportunities for low density detached single-family homes, accessory dwelling units, clustered and planned developments, mobile homes, manufactured housing and compatible uses such as day care and smaller residential care facilities. Bed and breakfast inns, and public and quasi-public uses may also be allowed in appropriate locations at the discretion of the city.
Permitted uses
Include but are not limited to:
Housing-Single unit
Housing-Senior
Housing-Student
Educational/school
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
4/10 Fire Factor
1% chance of being in a wildfire in next 30 years
5/10 Heat Factor
7 days above 95° expected this year, 14 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
9/10 Air Factor
16 unhealthy days expected this year, 17 days in 30 years
Provided by First Street
Historical weather
Napa, CA • 94558
Average low and high temperatures (°F)
59
39
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41
68
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77
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84
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87
56
91
59
83
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76
51
61
44
56
41
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Sun exposure
76/ 100
Good sunlight
Sunscore
There appears to be minimal shading by surrounding buildings, terrain, and vegetation.
7.9 hrs
5.4 hrs
JuneDecember
Provided by Shadowmap
Redfin Estimate for 155 Riordan Ln
We cannot show automated home-value estimates for this home.
Nearby homes have recently sold between $825,000 and $1,475,000.
Nearby comparable homes
The Redfin Estimate uses 6 recent nearby sales, priced between $825K to $1.5M.