SOLD DEC 9, 2025

Off market dec 2025 for $1M

$1,136,890

Est. refi paymentEst. refi $6,582/mo

•

3,588

sq ft

21540 Siri Rd, Guerneville, CA 95446

About this home

Single-familyProperty Type

1987Year Built

$317Est. Price/Sq.Ft.

4 car garageParking

Listed by Victor Makras •DRE #DRE #00555201 • Makras Real Estate

•415-282-8400 (agent)

•victor@makrasrealestate.com (agent)

•415-282-8400 (broker)

Bought with Adam Goldberg •DRE #DRE #01798689 • KB Properties

•707-321-2111 (broker)

•adam@kbtrust.com (broker)

Redfin checked: a few seconds ago

•Source:San Francisco MLS #325066574

Redfin Estimate

$1,136,890

$127K since sold in December 2025$3,000 since October

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 40% higher than the average sale price ($812K) of 6 comparable homes.

SOLD AUG 17, 2026
$749,000
A
3 beds2 baths1,657 sq ft
1365 Austin Creek Rd, Cazadero, CA 95421
SOLD SEP 22, 2026
$720,000
B
2 beds2 baths1,582 sq ft
1425 Austin Creek Rd, Cazadero, CA 95421
SOLD SEP 25, 2026
$540,000
C
3 beds2 baths1,328 sq ft
17360 Park Ave, Guerneville, CA 95446
SOLD OCT 13, 2026
$899,000
D
3 beds2 baths1,712 sq ft
19590 Redwood Dr, Monte Rio, CA 95462
SOLD OCT 26, 2026
$638,500
E
3 beds2 baths1,320 sq ft
21731 Monte Vista Ter, Monte Rio, CA 95462
SOLD JAN 29, 2026
$1,326,520
F
2 beds2 baths1,555 sq ft
17970 Duncan Rd, Monte Rio, CA 95446

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Earn from this home

Sell

$280,203

Est. take-home

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Refinance

Est. cash available

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Rent

$6,642/mo

Redfin rental estimate

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Market trends in 95446, CA

Last updated October 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-list price

98.6%

+0.2% MoM

Median sale price

$540K

$17K MoM

Avg. days on market

61d

17 days MoM

Recently sold homes

8 MoM

New listings for sale

COMING SOON
$499,000
1 bed2 baths800 sq ft
15173 Canyon 7 Rd, Guerneville, CA 95446
See all

Provided by Redfin

Sale history for 21540 Siri Rd

Year

Property tax

Land + Additions

Assessment*

2025

$20,236 (+100.7%)

$300,000 + $710,000

$1,010,000

2024

$10,083 (+2.0%)

$459,000 + $1,326,000

$1,785,000

2023

$9,884 (+2.9%)

$182,075 + $687,766

$869,841

2022

$9,605 (+1.4%)

$178,505 + $674,281

$852,786

2021

$9,475

$175,005 + $661,060

$836,065

2020

$9,475 (+2.4%)

$171,574 + $648,099

$819,673

2019

$9,251 (+6.7%)

$169,815 + $641,454

$811,269

2018

$8,672 (+4.8%)

$166,486 + $628,877

$795,363

2017

$8,274 (+4.9%)

$160,022 + $604,458

$764,480

2015

$7,887 (+2.1%)

$156,885 + $592,606

$749,491

2014

$7,724 (+0.3%)

$151,502 + $572,272

$723,774

2013

$7,700 (+2.0%)

$151,502 + $572,272

$723,774

2012

$7,546 (+2.0%)

$150,818 + $569,686

$720,504

2011

$7,395 (+1.1%)

$147,861 + $558,516

$706,377

2010

$7,314 (−0.6%)

$144,962 + $547,565

$692,527

2009

$7,358 (+1.3%)

$143,879 + $543,473

$687,352

2007

$7,266

$141,394 + $534,084

$675,478

Tax history for 21540 Siri Rd

Year

Property tax

Land + Additions

Assessment*

2025

$20,236 (+100.7%)

$300,000 + $710,000

$1,010,000

2024

$10,083 (+2.0%)

$459,000 + $1,326,000

$1,785,000

2023

$9,884 (+2.9%)

$182,075 + $687,766

$869,841

2022

$9,605 (+1.4%)

$178,505 + $674,281

$852,786

2021

$9,475

$175,005 + $661,060

$836,065

2020

$9,475 (+2.4%)

$171,574 + $648,099

$819,673

2019

$9,251 (+6.7%)

$169,815 + $641,454

$811,269

2018

$8,672 (+4.8%)

$166,486 + $628,877

$795,363

2017

$8,274 (+4.9%)

$160,022 + $604,458

$764,480

2015

$7,887 (+2.1%)

$156,885 + $592,606

$749,491

2014

$7,724 (+0.3%)

$151,502 + $572,272

$723,774

2013

$7,700 (+2.0%)

$151,502 + $572,272

$723,774

2012

$7,546 (+2.0%)

$150,818 + $569,686

$720,504

2011

$7,395 (+1.1%)

$147,861 + $558,516

$706,377

2010

$7,314 (−0.6%)

$144,962 + $547,565

$692,527

2009

$7,358 (+1.3%)

$143,879 + $543,473

$687,352

2007

$7,266

$141,394 + $534,084

$675,478

*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
Zoning
Permits

Beds

Baths

Stories

Lot width

—

Lot depth

—

Lot size

20 Acres

Year renovated

1987

Sq. Ft.

3,588

Year built

1987

Style

Single Family Residential

County

Sonoma County

APN

097100014000

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Oct 28, 2026.

RRD B6 160

Resources and Rural Development - B6 Combining District - One Dwelling per 160 Acres

Protects lands needed for: Commercial timber production, geothermal production, aggregate resources production; Watershed, fish and wildlife habitat, biotic resources; and Agricultural production activities not subject to the agricultural resources element of the general plan. Allows very low-density residential development and recreational and visitor-serving uses where compatible with resource use and available public services; and Implements the resources and rural development land use category of the general plan.; B Combining District: to specify residential density and/or minimum parcel or lot size for a particular parcel, lot or area.

Zone overlays

Scenic Resources Combining District

Permitted uses

Include but are not limited to:

Agriculture
Greenhouse / nursery
Livestock production
Housing-Group
Housing-Single unit

Property details

Parking

Garage Information
Has Garage
# of Garage Spaces: 4

Parking Information
Parking Features: Driveway, Detached
# of Covered Spaces: 4
# of Parking Total: 4
Has Open Parking

Interior

Bedrooms Information
# of Bedrooms: 3

Bathroom Information
Count of Bathrooms: 2
# of Full Bathrooms: 2

Interior Features
Interior Features: Cathedral Ceiling(s)
Laundry Features: Laundry Closet
Has Heating
Heating: Wood Stove, Fireplace(s), Central
Cooling: None
Flooring: Other, Tile, Linoleum
Has Fireplace(s)
# of Fireplaces Total: 1
Fireplace Features: Living Room
Appliances: Double Oven, Disposal, Dishwasher

Exterior

Exterior Features
Entry Level: 0

Building Information
Living Area: 3588
Living Area Units: Square Feet
Living Area Source: Assessor Agent-Fill
Building Area Total: 3588
Building Area Units: Square Feet
Building Area Source: Assessor Agent-Fill
Levels: Two
Construction Materials: Wood, Redwood Siding, Frame
Architectural Style: Traditional
Year Built: 1987
Year Built Source: Assessor Agent-Fill
Roof: Composition
Foundation Details: Concrete Perimeter

Property Type
Property Type: Residential
Property SubType: Single Family Residence
Property Subtype 1: Single Family Residence

Property Information
Property Condition: Original
Current Use: Residential
Security Features: Smoke Detector(s), Carbon Monoxide Detector(s)

Land Information
Topography: Lot Sloped

Lot Information
Lot Features: Greenbelt
Lot Size Sq. Ft.: 0
Lot Size Acres: 0
Lot Size Area: 0
Lot Size Units: Acres
Lot Size Units: Square Feet
Elevation: 0
Elevation Units: Feet
Road Responsibility: Private Maintained Road
Road Surface Type: Asphalt
Zoning: RRD-160

Utilities

Utility Information
Utilities: Other
Sewer: Septic Tank
Water Source: Well

Location

HOA Information
Association Fee: 0

Public facts

Beds: 3
Baths: 3.0
Sq. Ft.: 3,588
Stories: 2.0
Lot Size: 20 acres
Style: Single Family Residential
Year Built: 1987
Year Renovated: 1987
County: Sonoma County
APN: 097100014000

Home facts updated by county records on Oct 28, 2026

Around this home

Schools

K - 12
Preschool & daycare

Monte Rio Elementary School

Public K-8 • Assigned • 1.3mi

7/10

Analy High School

Public 9-12 • Assigned • 12.3mi

8/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Climate risks

1/10 Flood Factor

Minimal risk of a flood reaching the building in the next 30 years

3/10 Fire Factor

0.15% chance of being in a wildfire in next 30 years

1/10 Heat Factor

2 hot days expected this year, 2 days in 30 years

1/10 Wind Factor

Minimal risk of severe winds over next 30 years

9/10 Air Factor

17 unhealthy days expected this year, 19 days in 30 years

Provided by First Street

Historical weather

Guerneville, CA • 95446

Average low and high temperatures (°F)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

In this area, properties receive around 10.6 hours in June and 4.9 hours in December, placing it above the U.S. average for solar exposure.

10.6 hrs

4.9 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$1.08M – $1.31M

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COMING SOONVIDEO TOUR

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Home values near 21540 Siri Rd

Data from public records.

Address	Redfin Estimate
21950 Highway 116, Monte Rio, CA 2 Beds \| 2 Baths \| 1360 Sq. Ft.	$621,181

Address	Redfin Estimate
22453 CA-116, Monte Rio, CA 3 Beds \| 2.5 Baths \| 1870 Sq. Ft.	$1,760,735

Address	Redfin Estimate

Property information provided by San Francisco MLS when last listed in 2025. This data may not match . Learn more.

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About this home

Redfin Estimate

Earn from this home

Market trends in 95446, CA

Sale history for 21540 Siri Rd

Tax history for 21540 Siri Rd

Public record

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 95446

Home values near 21540 Siri Rd

More real estate resources