Contract Signed
5 beds3,962 sqft

321 Castle Crest Rd, Alamo, CA 94507

Single FamilyProperty Type
1.17 acresLot Size
1991Year Built
$637/sq ftPrice per sq ft
4 carsParking Spaces

Description

A comprehensive transformation by Alamo-based RSR Development, bringing together sophisticated design, significant structural engineering, and high-quality construction. Direct Mt. Diablo views, expansive windows, and energy efficiency. The entry pivot door sets the tone immediately, opening to the huge view-framing window capturing the mountain through floating maple stair treads. A striking architectural moment designed by noted Architect Martin Hammer. The main living level centers around an open...A comprehensive transformation by Alamo-based RSR Development, bringing together sophisticated design, significant structural engineering, and high-quality construction. Direct Mt. Diablo views, expansive windows, and energy efficiency. The entry pivot door sets the tone immediately, opening to the huge view-framing window capturing the mountain through floating maple stair treads. A striking architectural moment designed by noted Architect Martin Hammer. The main living level centers around an open gathering area with soaring vaulted wood ceilings, stunning kitchen representing sea, earth and sky, formal dining, exposed beams, expansive Fleetwood windows, and access to an outdoor seating area overlooking Mt. Diablo. The kitchen anchors the home with quartzite island, Wolf/Sub-Zero appliances, steam oven, custom hood and walk-in pantry. A refined mix of stone, glass, metal, and natural warmth. Extensively remodeled with an emphasis on architecture, systems, and symmetry, the home includes steel beams, double shear, owned solar, updated HVAC, maple hardwood, modern railings, upgraded lighting, and a media room / 5th bedroom. Set on 1.17 acres on one of Alamo’s friendliest streets, the flexible floor plan offers two ensuite bedrooms with one on the main level, two living areas, and easy access to two 2-car garages (total 4). Close to downtown WC, BART, Iron Horse Trail, and 680.
Listing Agent
  1. Carolyn Gwynn

    Carolyn Gwynn

    Listing Agent

    Compass

    DRE #01888136

    P: (925) 336-7525

61 days on Market
Last updated: 09/30/2026 05:57 PM • Source: EBRD, MLS#: 41141765

Location

Listing Courtesy of Compass, Carolyn Gwynn, DRE #01888136
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Property Information for 321 Castle Crest Road

Property Details

  • MLS Type: Residential / Detached
  • City: ALAMO
  • Dist Neighborhood Subdiv: WEST SIDE ALAMO
  • Building Type: Detached
  • Property Sub Type: Detached
  • Style: Contemporary
  • Garage Spaces: 4
  • Garage/Parking: Attached
  • View: Las Trampas Foothills, Mt Diablo, Panoramic

Building Information

  • Stories: 2
  • Year Built: 1991
  • Lot Size: 1.17 AC / 50,965 SF

Features

Feature Details
  • Fireplaces: 0
  • FIREPLACES: None
  • Flooring: Hardwood Flrs Throughout
  • Garage: Yes
  • Laundry: Dryer, Laundry Room, Washer
  • Pool Type: None
  • Pool: No
Room Details
  • Rooms Total: 12
  • Additional Rooms: Media / Home Theater
  • Kitchen Features: Stone Counters, Dishwasher, Double Oven, Eat-in Kitchen, Disposal, Gas Range/Cooktop, Kitchen Island, Microwave, Oven Built-in, Pantry, Refrigerator, Updated Kitchen
  • Bedrooms Count: 5
  • Bathrooms Total Count: 4.0
  • Room Additional: Family Room, Formal Dining Room, Eat-In Kitchen, MediaRoom, Kitchen, Laundry, LivingRoom, Primary Bedrooms 2+
  • Bathrooms Half: 1
  • ADU Y/N: No
Utility Details
  • Cooling: Central Air
  • Heating: Forced Air 2 Zns or More
  • Solar: Solar Electrical Owned

Lot / Property Details

Home Owners Association
  • HOA: No
Property Details
  • Additional Equipment: Dryer, Washer, Gas Water Heater, Carbon Mon Detector, Smoke Detector(s)
  • City Transfer Tax: No
  • Construction Status: Existing
  • Exterior: Double Pane Windows, Wood Siding
  • Foundation: Raised
  • Level - Upper: 1 Bedroom, 0.5 Bath, Primary Bedrm Suite - 1
  • Lot Description: Cul-De-Sac, Sloped Down
  • Lot Sq Ft Apx: 50965
  • Lot Size Square Feet: 50965.0
  • Roof: Composition Shingles
  • Sq Ft Apx: 3962
  • Stories: Two Story
  • Street Level: 3 Bedrooms, 3 Baths, Main Entry
  • Yard Description: Deck(s), Front Yard
  • Year Built: 1991
  • Acres: 1.17
Location Details
  • Directions to Property: Crest Ave to Castle Crest.
  • FIPS Code: 06013
  • Parcel Number: 188-392-018-1
  • Printed Neighborhood Rpt: Yes
  • Board ID: CONTRA COSTA

Additional Information

Additional Information
  • Fireplace: No

Property History for 321 Castle Crest Road

DateEvent & SourcePriceAppreciation
Sep 30, 2026

Pending

MLSListings #CC41141765

—
Sep 30, 2026

Pending

EBRD #41141765

—
Sep 29, 2026

Pending

CRMLS #41141765

—
DateEvent & SourcePrice
09/30/2026

Pending

MLSListings #CC41141765

—
09/30/2026

Pending

EBRD #41141765

—
09/29/2026

Pending

CRMLS #41141765

—

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

Public records

321 Castle Crest Road

Beds

4

Baths

4.5

Total Finished SqFt

3,962 SqFt

Above Grade Finished SqFt

3,962 SqFt

Stories

2

Lot Size

50,965 SqFt

Schools near 321 Castle Crest Road

This home is within Acalanes Union High School District.
Rating
School
Type
Grades
Distance
Public - K to 5
Public - 6 to 8
Public - 9 to 12
Public - 9 to 12
Rating
School
Distance
Murwood Elementary School
PublicK to 5

Walnut Creek Intermediate School
Public6 to 8

Las Lomas High School
Public9 to 12

Acalanes Center For Independent Study
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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No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of any information, descriptions or measurements (including square footage measurements and property condition), such should be independently verified through appropriate means, including, but not limited to, in person inspection and public records, and Compass International Holdings, its subsidiaries, affiliates and independently owned and operated franchisees, and their affiliated agents and associated third parties expressly disclaim 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 seller's discretion. No financial or legal advice provided. Equal Housing Opportunity.

Listing Courtesy of Compass, Carolyn Gwynn, DRE #01888136

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.