A rare opportunity to enjoy complete privacy in the highly coveted Montecito Heights, just a half-mile from vibrant shops and dining. This mid-century modern masterpiece is meticulously maintained and boasts soaring ceilings with skylights, atrium, sunroom, gorgeous hardwood floors, and new custom light fixtures. Attached 2-car garage plus detached lofted 2-car garage, easily converted into a MIL/rental unit. Perfect too as a music, art or yoga studio. With 5 bedrooms (two with lofts), 3.5 bathrooms, and large custom office with closet, this special residence boasts unparalleled aesthetics, luxury, comfort & versatility. The private primary en-suite bedroom showcases a vaulted ceiling, jetted tub, balcony, custom closet & picturesque windows framing nature, while two living rooms beckon w/ fireplaces, & seamlessly extend to sprawling wrap around deck & yard. This magical property features a new seasonal creek with river rocks. Relax and enjoy wildlife. Abundance of room for your pickle ball court, dream pool, hobby vineyard, garden oasis, the possibilities are endless, and no HOA! Must see to believe!
Single-familyProperty Type
1978Year Built
1.92 acresLot Size
$495Price/Sq.Ft.
4 garage spacesParking
Listed by Kimberly Sethavanish•DRE #01915066• Century 21 Epic
•707-787-7793 (agent)
•modernagentkj@gmail.com (agent)
Listed by James Colucci•DRE #01925951• Century 21 Epic
•707-508-6033 (agent)
•modernagentkj@gmail.com (agent)
Bought with Shelli Bradley•DRE #02016777• Alliance Bay Realty
Est. $5,294 per month, based on comparable rentals
Sale and tax history for 3540 Happy Valley Rd
Sale History
Tax History
Date
Event
Price
BAREIS #326026870
Jun 29, 2026
Sold
$1,624,000
$495/sq ft
Jun 22, 2026
Pending
—
Apr 22, 2026
Contingent
—
Apr 1, 2026
Listed
$1,599,000
$487/sq ft
APPFOLIO #1
Jun 28, 2026
Rental Removed
$8,500
$3/sq ft
Oct 7, 2025
Listed for Rent
$8,500
$3/sq ft
BAREIS #325071895
Sep 18, 2025
Contingent
—
Sep 3, 2025
Price Changed
*
Aug 8, 2025
Listed
*
BAREIS #324036128
May 29, 2025
Price Changed
*
Mar 8, 2025
Price Changed
*
Jan 9, 2025
Price Changed
*
Jan 1, 2025
Relisted
—
Sep 26, 2024
Relisted
—
May 24, 2024
Listed
*
BAREIS #322014735
Mar 21, 2022
Sold
$1,425,000
$434/sq ft
Mar 8, 2022
Pending
—
Feb 27, 2022
Contingent
—
Feb 25, 2022
Listed
$1,250,000
$381/sq ft
Public Records
Mar 9, 1989
Sold
$455,000
$139/sq ft
Year
Property tax
Land + Additions
Assessment*
2025
$10,501 (+1.5%)
$294,024 + $620,155
$914,179
2024
$10,343 (+3.9%)
$288,259 + $607,996
$896,255
2023
$9,957 (+9.4%)
$282,607 + $596,075
$878,682
2022
$9,103 (+2.0%)
$277,066 + $584,388
$861,454
2021
$8,921 (+0.4%)
$309,457 + $495,138
$804,595
2020
$8,888 (+0.9%)
$303,390 + $485,430
$788,820
2019
$8,806 (+0.6%)
$300,280 + $480,453
$780,733
2018
$8,752 (+1.9%)
$294,393 + $471,033
$765,426
2017
$8,592 (+4.1%)
$282,962 + $452,744
$735,706
2015
$8,254 (+3.8%)
$277,414 + $443,867
$721,281
2014
$7,955 (+17.2%)
$267,895 + $428,636
$696,531
2013
$6,786 (−0.3%)
$267,895 + $428,636
$696,531
2012
$6,807
$233,500 + $373,000
$606,500
2011
$6,802 (−7.4%)
$233,000 + $374,000
$607,000
2010
$7,344 (−0.5%)
$233,000 + $374,000
$607,000
2009
$7,384 (+2.1%)
$254,415 + $407,066
$661,481
2007
$7,235
$250,020 + $400,034
$650,054
Public record
Public record
Zoning
Permits
Beds
3
Baths
3.5
Stories
2
Lot width
—
Lot depth
—
Lot size
1.92 Acres
Year renovated
1993
Sq. Ft.
2,814
Year built
1978
Style
Single Family Residential
County
Sonoma County
APN
181340011000
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Aug 13, 2026.
R-1-6
Single-Family Residential District - 6,000 sq ft
The R-1 zoning district is applied to areas of the City intended to be maintained as residential neighborhoods comprised of detached and attached single-family houses, clustered Residential hillside projects, and small multi-family projects, together with compatible accessory uses. The maximum allowable density ranges from two to 13 dwellings per acre, with the specific allowable density for each parcel shown on the zoning map by a numerical suffix to the R-1 map symbol see Section 20-22.040. The R-1 zoning district implements and is consistent with the Residential Very Low Density where residential clustered on hillsides is desirable, Low Density or Open Space, Low Density, and Medium Low Density land use classifications of the General Plan.
Permitted uses
Include but are not limited to:
Agriculture-Other
Day care facility
Healthcare-Other
Housing-Single unit
Housing-Student
Housing-Other
Infrastructure-Other
Housing-Mobile home park
Sep 10, 2020 • Final
Residential electrical
Work on an installation.
Electrical
Jul 13, 2020 • Final
Residential plumbing
Remove and replace a gas water heater.
Gas
Plumbing
Water heater
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.