First time to the market, built in 1993 by famed Hewlett-Packard engineer, Thomas Osborne, this rare single owner offering embodies the true spirit of Sea Ranch living. Helping Osborne was Fiona O'Neill, architect and Helmuth Emke, contractor. An open floor plan, sweeping ocean and cliff views, enormous gourmet kitchen and spacious outdoor living spaces make this home an entertainers dream. Two large bedrooms on the main floor each with a full bath plus a powder room for guests along with a bonus finished basement create privacy for guests, hobbies, families and more. A large office with built in desks and shelving offers sea views for miles, as does every room in the house. The three car garage includes a bonus storage room and sealed wine cellar. Situated at the end of a cul de sac, this home is climate and weather tested with excellent drainage, free of nearby trees, and unobstructed views to the ocean. All utilities are underground to the property including fiber optic internet. This hillside perch provides access to miles of trails on both sides of Highway 1, walking and cycling on 60+ miles of private roads. Property is walking distance to business center off Annapolis Road and the private airstrip available to Sea Ranch members only. A must see property!
Single-familyProperty Type
1994Year Built
0.82 acresLot Size
$975Est. Price/Sq.Ft.
3 garage spacesParking
Listed by Hanne Liisberg•DRE #01238745• Liisberg & Company
•707-888-4337 (agent)
•hanne@LiisbergandCompany.com (agent)
Bought with Kathleen Huse•DRE #01779844• Kennedy & Associates
Bought with Cassie Henderson•DRE #01355194• Kennedy & Associates
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Refinance
$0
Est. cash available
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Rent
$3,362/mo
Redfin rental estimate
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Market trends in 95480, CA
Last updated July 2026
Buyer's Market
Seller's Market
Balanced market
Sale-to-List Price
97.5%
+0.2% MoM
Median sale price
$2.1M
$486 MoM
Avg. days on market
18d
6 days MoM
Recently sold homes
3
4 MoM
Provided by Redfin
Sale history for 300 Spring Mdw
Date
Event
Price
BAREIS #323926533
Jan 25, 2024
Sold
$2,700,000
$1,001/sq ft
Jan 12, 2024
Pending
—
Dec 8, 2023
Contingent
—
Nov 24, 2023
Listed
$2,750,000
$1,019/sq ft
Year
Property tax
Land + Additions
Assessment*
2025
$29,874 (+277.9%)
$1,123,632 + $1,685,448
$2,809,080
2024
$7,906 (+1.7%)
$1,101,600 + $1,652,400
$2,754,000
2023
$7,774 (+4.3%)
$116,258 + $574,409
$690,667
2022
$7,457 (+1.7%)
$113,979 + $563,147
$677,126
2021
$7,335 (−0.4%)
$111,745 + $552,105
$663,850
2020
$7,361 (+0.7%)
$109,554 + $541,280
$650,834
2019
$7,308 (+4.6%)
$108,431 + $535,730
$644,161
2018
$6,985 (−1.6%)
$106,305 + $525,226
$631,531
2017
$7,096 (+5.2%)
$102,178 + $504,832
$607,010
2015
$6,748 (+1.7%)
$100,175 + $494,934
$595,109
2014
$6,635 (+1.6%)
$96,739 + $477,951
$574,690
2013
$6,533 (+1.6%)
$96,739 + $477,951
$574,690
2012
$6,429 (+2.7%)
$96,302 + $475,791
$572,093
2011
$6,258 (+0.9%)
$94,414 + $466,462
$560,876
2010
$6,203 (+0.2%)
$92,563 + $457,316
$549,879
2009
$6,189 (+0.8%)
$91,872 + $453,899
$545,771
2007
$6,140
$90,286 + $446,057
$536,343
Tax history for 300 Spring Mdw
Year
Property tax
Land + Additions
Assessment*
2025
$29,874 (+277.9%)
$1,123,632 + $1,685,448
$2,809,080
2024
$7,906 (+1.7%)
$1,101,600 + $1,652,400
$2,754,000
2023
$7,774 (+4.3%)
$116,258 + $574,409
$690,667
2022
$7,457 (+1.7%)
$113,979 + $563,147
$677,126
2021
$7,335 (−0.4%)
$111,745 + $552,105
$663,850
2020
$7,361 (+0.7%)
$109,554 + $541,280
$650,834
2019
$7,308 (+4.6%)
$108,431 + $535,730
$644,161
2018
$6,985 (−1.6%)
$106,305 + $525,226
$631,531
2017
$7,096 (+5.2%)
$102,178 + $504,832
$607,010
2015
$6,748 (+1.7%)
$100,175 + $494,934
$595,109
2014
$6,635 (+1.6%)
$96,739 + $477,951
$574,690
2013
$6,533 (+1.6%)
$96,739 + $477,951
$574,690
2012
$6,429 (+2.7%)
$96,302 + $475,791
$572,093
2011
$6,258 (+0.9%)
$94,414 + $466,462
$560,876
2010
$6,203 (+0.2%)
$92,563 + $457,316
$549,879
2009
$6,189 (+0.8%)
$91,872 + $453,899
$545,771
2007
$6,140
$90,286 + $446,057
$536,343
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Public record
Public record
Permits
Beds
2
Baths
2.5
Stories
1
Lot width
—
Lot depth
—
Lot size
0.82 Acres
Year renovated
1994
Sq. Ft.
2,698
Year built
1994
Style
Single Family Residential
County
Sonoma County
APN
155410004000
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Aug 13, 2026.
Jun 11, 2016 • Final
Building history record
Work on a single-family home, garage, and deck.
Addition
Permit history is from public records and may be incomplete or inaccurate. Redfin and its agents make no representations about the property condition or permit status. Buyers should independently verify all information.
Property details
Parking
Parking & Garage Information
Parking Total: 5
Parking Features: Attached, Garage Door Opener
Garage Spaces: 3
Interior
Bathroom Information
# of Bathrooms (Total): 3
# of Bathrooms (Full): 2
# of Bathrooms (Partial): 1
Other Bathroom Features: Bidet, Double Sinks, Shower Stall(s)
Bedroom Information
# of Bedrooms (Total): 2
Master Bedroom Features: Walk-In Closet
Heating & Cooling
Cooling: None
Heating: Central, Propane
Interior Features
Appliances: Built-In Gas Range, Built-In Refrigerator, Dishwasher, Hood Over Range