18455 Half Moon St

Sonoma, CA 95476

$8,200,000
Price
5
Beds
5,736 Sq. Ft.
$1,430 / Sq. Ft.
5,736
Sq. Ft.
$1,430
per Sq. Ft.
Listed By CompassVirtual Tour
Listed By CompassVirtual Tour

Description

The minute you arrive at this property you're immediately immersed in the peaceful, natural surroundings. The main house boasts spacious bedrooms with ensuite bathrooms, a tranquil primary suite, and an open living area with a four way fireplace. The kitchen features an island with a live edge walnut top, premium appliances and a walk-in pantry. A separate guest housesits above the four car garage and has a treehouse feel as you take in the gorgeous surroundings from the wraparound balcony. A rare...The minute you arrive at this property you're immediately immersed in the peaceful, natural surroundings. The main house boasts spacious bedrooms with ensuite bathrooms, a tranquil primary suite, and an open living area with a four way fireplace. The kitchen features an island with a live edge walnut top, premium appliances and a walk-in pantry. A separate guest housesits above the four car garage and has a treehouse feel as you take in the gorgeous surroundings from the wraparound balcony. A rare find is the in-ground wine cellar. This space can hold an impressive collection of wine and features native rock from around the property. The outdoor entertaining areas are spectacular with an expansive stone patio overlooking the pond complete with a lighted fountain and floating islands. The gardens and landscaping are truly breathtaking with an incredible variety of plants, flowers, fruit and citrus trees and more.18455 Half Moon Street holds a sense of magic that cannot be found elsewhere.

Property Details for 18455 Half Moon Street

Architectural Style
Mediterranean, Spanish
View Description
Hills, Valley
Cross Street
N. Castle Road
Total Parking Spaces
20
LISTING UPDATED: 10/21/2025 04:39 PM

Property Details for 18455 Half Moon Street

StatusActive
MLS #325085716
Days on Compass82
Taxes-
HOA Fees-
Condo/Co-op Fees-
Compass TypeSingle Family
MLS TypeResidential / Single Family Residence
Year Built2005
Lot Size6.25 AC / 272,250 SF
CountySonoma County

Location

Listing Courtesy of Compass, Matt Sevenau, DRE #01890164; Compass, Maurice Tegelaar, DRE #01465653
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Building Information for 18455 Half Moon Street

Stories-Year Built2005Building Size-Lot Size6.25 AC / 272,250 SF

Payment Calculator

$49,331 per month

30 year fixed, 6.28% Interest

Principal and Interest

$40,519

Property Taxes

$8,812

HOA Dues

$0

The Payment Calculator is for illustrative purposes only.

Property Information for 18455 Half Moon Street

Summary
Location and General Information
  • Area/District: Sonoma
  • Area Short Display: B1300
  • Directions to Property: From Sonoma Plaza, E. on E. Napa St, left on 7th St E., R Castle Rd, L N. Castle Rd. L Half Moon.
  • Area Long Display: Sonoma
Taxes and HOA Information
  • Association: No
  • Association Fee: $0
  • APN: 127-111-102-000
Parking
  • Parking Features: Detached
  • Carport Spaces: 0
  • Garage Spaces: 4
  • Open Parking Spaces: 0
Virtual Tour
  • Virtual Media Count: 2
Property
Lot Information
  • Square Footage: 5736.0
  • Square Footage Source: Assessor Agent-Fill
  • Year Built Source: Assessor Agent-Fill
  • Lot Size Source: Assessor Auto-Fill
  • Lot Size Square Feet: 272250.0
  • Lot Features: Pond Year Round, Private, Secluded
Property and Assessments
  • Security Features: Security Gate
  • Senior Community: No
  • Picture Count: 39
  • Property Disclaimer: All data, photos, visualizations, and information regarding a property, including the property's compliance with state and local legal requirements and all measurements and calculations of area, have been obtained from various sources, and may include such material that has been generated by use of artificial intelligence. Such information and material have not been and will not be verified for accuracy by the listing broker or the multiple listing service, and are not guaranteed as complete, accurate or reliable. Such information and material should be independently reviewed and verified for accuracy. This information and material are intended for the personal use of consumers and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.
  • Construction Materials: Frame, Stone, Stucco, Wood
Utilities
  • Sewer: Septic System
  • Water Source: Well
  • Utilities: Internet Available
Interior and Exterior Features
Exterior Features
  • Driveway/Sidewalks: Gated, Paved Driveway
  • Horse Property: No
  • Stories: 0
  • Levels: One
  • Main Level: Bedroom(s), Dining Room, Full Bath(s), Garage, Kitchen, Living Room, Primary Bedroom, Street Entrance
  • Pool: Yes
  • Pool Features: In Ground, Cabana
  • Roof: Tile
  • Pool: Yes
Interior Features
  • Heating: Central
  • Cooling: Central
  • Bath Features: Granite, Marble, Shower Stall(s), Tub
  • Full Bathrooms: 4
  • Half Bathrooms: 2
  • Bathrooms: 6.0
  • Bedrooms: 5
  • Dining Room Features: Formal Area, Formal Room
  • Family Room Features: Great Room
  • Living Room Features: Cathedral/Vaulted, Deck Attached, Open Beam Ceiling
  • Kitchen Features: Breakfast Area, Breakfast Room, Pantry Closet, Slab Counter
  • Flooring: Wood
  • Fireplace Features: Den, Living Room, Primary Bedroom
  • Fireplace: Yes
  • Appliances: Built-In Gas Range, Built-In Refrigerator, Hood Over Range, Ice Maker
  • Laundry Features: Dryer Included, Inside Room, Washer Included
  • # of Fireplaces: 3
  • # of Rooms: 0
  • Room Type: Guest Quarters, Media Room, Storage, Wine Cellar
Multi Family
Multi-Family Information
  • # of Units: 0
Multi-Family Additional Information
  • 2nd Unit Bedrooms: 1
  • 2nd Unit Approx SqFt: 0.0
  • 2nd Unit Full Baths: 1
  • 2nd Unit Partial Baths: 0
  • 2nd Unit Kitchen: Yes
  • 2nd Unit Occupied: No
  • 2nd Unit Rents for: $.00
  • 2nd Unit Type: Detached
Unit 2
  • ADU/2nd Unit: Yes

Property History for 18455 Half Moon Street

DateEvent & SourcePriceAppreciation
Sep 24, 2025

Listed (Active)

REBAREIS #325085716

$8,200,000—
Aug 11, 2025

Withdrawn

REBAREIS #325020719

$8,800,000—
Apr 1, 2025

Listed (Active)

REBAREIS #325020719

$8,800,000—
Oct 24, 2005

Sold

RESFAR #20520664

$6,500,000—
Oct 4, 2005

Pending

RESFAR #20520664

—
Jul 31, 2005

Expired

RESFAR #287015

—
Jun 30, 2005

Withdrawn

RESFAR #20500128

$8,500,000—
Apr 15, 2005

Listed (Active)

RESFAR #287015

$8,500,000—
Jan 3, 2005

Price Change

RESFAR #20520664

$8,500,000—
Jan 3, 2005

Listed (Active)

RESFAR #20520664

$6,900,000—
Jan 3, 2005

Listed (Active)

RESFAR #20500128

$8,500,000—
Jul 15, 2001

Expired

RESFAR #2108307

—
Apr 12, 2001

Listed (Active)

RESFAR #2108307

$2,500,000—
Sep 16, 1999

Expired

RESFAR #9906464

$1,700,000—
Mar 31, 1999

Listed (Active)

RESFAR #9906464

$1,700,000—
Nov 1, 1997

Withdrawn

RESFAR #6704235

—
May 1, 1997

Listed (Active)

RESFAR #6704235

$1,695,000—
DateEvent & SourcePrice
09/24/2025

Listed (Active)

REBAREIS #325085716

$8,200,000
08/11/2025

Withdrawn

REBAREIS #325020719

$8,800,000
04/01/2025

Listed (Active)

REBAREIS #325020719

$8,800,000
10/24/2005

Sold

RESFAR #20520664

$6,500,000
10/04/2005

Pending

RESFAR #20520664

—
07/31/2005

Expired

RESFAR #287015

—
06/30/2005

Withdrawn

RESFAR #20500128

$8,500,000
04/15/2005

Listed (Active)

RESFAR #287015

$8,500,000
01/03/2005

Price Change

RESFAR #20520664

$8,500,000
01/03/2005

Listed (Active)

RESFAR #20520664

$6,900,000
01/03/2005

Listed (Active)

RESFAR #20500128

$8,500,000
07/15/2001

Expired

RESFAR #2108307

—
04/12/2001

Listed (Active)

RESFAR #2108307

$2,500,000
09/16/1999

Expired

RESFAR #9906464

$1,700,000
03/31/1999

Listed (Active)

RESFAR #9906464

$1,700,000
11/01/1997

Withdrawn

RESFAR #6704235

—
05/01/1997

Listed (Active)

RESFAR #6704235

$1,695,000

For completeness, Compass often displays two records for one sale: the MLS record and the public record.

Public Records for 18455 Half Moon Street

Taxable ValueLand$4,136,786Additions$5,225,182Total$9,361,968
Tax Record2025$105,743 ($8,812 / month)
Home Facts
Total Finished SqFt4,512 SqFtAbove Grade Finished SqFt4,512 SqFtStories1Lot Size272,250 SqFtStyleMulti-Family Dwelling (2-4)Year Built2005CountySONOMAAPN127-111-102-000Fireplace TypeHas Fireplace

Schools near 18455 Half Moon Street

This home is within Sonoma Valley Unified School District.
Rating
School
Type
Grades
Distance
Prestwood Elementary School
Public - K to 5
Adele Harrison Middle School
Public - 6 to 8
Sonoma Valley High School
Public - 9 to 12
Creekside High School
Public - 9 to 12
Rating
School
Distance
Prestwood Elementary School
PublicK to 5

Adele Harrison Middle School
Public6 to 8

Sonoma Valley High School
Public9 to 12

Creekside High School
Public9 to 12

School ratings and boundaries are provided by GreatSchools.org and Pitney Bowes. This information should only be used as a reference. Proximity or boundaries shown here are not a guarantee of enrollment. Please reach out to schools directly to verify all information and enrollment eligibility.

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More information about 18455 Half Moon Street, Sonoma, CA 95476

18455 Half Moon Street is a single family home for sale in Sonoma, CA 95476. This property was listed for sale on September 24, 2025 by Compass, it's currently listed at $8,200,000. It has been on the market for a total of 82 days and was last sold on October 24, 2005. This listing's school district is Sonoma Valley Unified School District. Nearby schools include Prestwood Elementary School, Adele Harrison Middle School and Sonoma Valley High School. 18455 Half Moon Street is a 5-bed, 6-bath, 5,736 sqft single family home built in 2005.

No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of descriptions or measurements (including square footage measurements and property condition), such should be independently verified, and Compass expressly disclaims any liability in connection therewith. Photos may be virtually staged or digitally enhanced and may not reflect actual property conditions. Offers of compensation are subject to change at the discretion of the seller. No financial or legal advice provided. Equal Housing Opportunity. Subject to change at any time. Compass makes no guarantee, warranty or representation regarding the accuracy of any waterfront feature, water view or waterfront view.

Listing Courtesy of Compass, Matt Sevenau, DRE #01890164; Compass, Maurice Tegelaar, DRE #01465653

Based on information from one of the following Multiple Listing Services: San Francisco Association of Realtors, the MLSListings MLS, the BAREIS MLS, the EBRD MLS, Shasta Association of REALTORS® Information being provided is for the visitor’s personal, noncommercial use and may not be used for any purpose other than to identify prospective properties visitor may be interested in purchasing. The data contained herein is copyrighted by San Francisco Association of Realtors, the MLSListings MLS, the BAREIS MLS, the EBRD MLS, Shasta Association of REALTORS® is protected by all applicable copyright laws. Any dissemination of this information is in violation of copyright laws and is strictly prohibited. Property information referenced on this web site comes from the Internet Data Exchange (IDX) program of the MLS. This web site may reference real estate listing(s) held by a brokerage firm other than the broker and/or agent who owns this web site. For the avoidance of doubt, the accuracy of all information, regardless of source, is deemed reliable but not guaranteed and should be personally verified through personal inspection by and/or with the appropriate professionals.