OPEN SAT, 1PM TO 3PM

For sale

$2,688,000

Est. $17,218/mo —

•

3,962

sq ft

321 Castle Crest Rd, Alamo, CA 94507

About this home

A modern retreat with direct Mt. Diablo views, expansive windows, elevated materials, energy efficiency, and everyday livability. 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. 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 reimodeled 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. OPEN SUNDAY 1-4pm

Single-familyProperty Type

1991Year Built

1.17 acresLot Size

$678Price/Sq.Ft.

4 car garageParking

Listed by Carolyn Gwynn •DRE #01888136 • Compass

Listing updated: Aug 27, 2026 at 05:21pm

Redfin checked: 2 minutes ago

•Source:bridgeMLS, Bay East AOR, or Contra Costa AOR #41141765

Payment calculator

$17,218 per month

Principal and interest$13,947

Property taxes

$2,800

HOA dues

Home insurance

$470

Utilities

Add

5 minutes to get started. No credit impact.

Mortgage resources

See this home in person

This home is unavailable to tour on this day.

Next available date: Friday, August 28

Open houses

Saturday, Aug 29

1:00pm - 3:00pm

Sunday, Aug 30

2:00pm - 5:00pm

Nearby open houses (10)

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REDFIN OPEN SUN, 1PM TO 4PM3D WALKTHROUGH
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Around this home

Schools

K - 12
Preschool & daycare

Murwood Elementary School

Public K-5 • Assigned • 1.4mi

9/10

Walnut Creek Intermediate School

Public 6-8 • Assigned • 3.1mi

9/10

Las Lomas High School

Public 9-12 • Assigned • 1.9mi

10/10

Provided by GreatSchools

About Westside

Alamo

Westside Alamo, located between Danville Boulevard and the Las Trampas foothills, is a residential and semi-rural Alamo neighborhood with winding lanes and oak-studded open space. The neighborhood’s character concentrates around the Danville Blvd–Stone Valley Rd junction, where low-slung plazas, coffee counters, and local dining set a polished, low-key rhythm. Architecture leans toward ranch homes, custom builds, and larger-lot properties framed by mature trees and ridgelines. Trailheads and creekside corridors shape daily routines with a strong outdoors thread. The pace stays quiet, with most activity clustering near the commercial strip rather than inside the hills. Views and topography give the area a distinctly West County feel.

Provided by Walk Score and Local Logic

Offer insights

321 Castle Crest Rd · $2,688,000

Strong offer

$2.65M and above

75% chance or better to win

Why $2.65M+ is a strong offer

DAYS ON MARKET

The average home goes pending in 21 days.

SALE-TO-LIST

Most homes are selling 2% above list price.

About offer insights

Property details

Interior
Exterior
Finance

Kitchen

Bathroom

Bedroom

Living

Dining

Interior features
Family room
Formal dining room
Pantry
Updated kitchen
Double pane windows

Bedrooms
Primary bedroom suite on upper level
One bedroom on upper level
Three bedrooms on street/main level

Bathrooms
Five bathrooms total (four full, one half)

Kitchen
Dishwasher
Disposal
Double oven
Gas range / cooktop
Built-in oven
Microwave
Refrigerator
Kitchen island
Eat-in kitchen
Pantry
Stone counters
Updated kitchen

Laundry & utility
Laundry room with washer and dryer
Gas water heater

Flooring
Hardwood floors throughout

Heating & cooling
Zoned heating
Central air

Sale and tax history for 321 Castle Crest Rd

Sale History
Tax History

Date

Event

Price

bridgeMLS, Bay East AOR, or Contra Costa AOR #41141765

Aug 8, 2026

Price Changed

$2,688,000

$678/sq ft

Jul 15, 2026

Listed

$2,798,000

$706/sq ft

bridgeMLS, Bay East AOR, or Contra Costa AOR #41138227

Jul 14, 2026

Listing Removed

—

Jun 12, 2026

Coming Soon

bridgeMLS, Bay East AOR, or Contra Costa AOR #40903940

Jul 27, 2020

Sold

$1,475,000

$372/sq ft

Jun 12, 2020

Pending

—

Jun 3, 2020

Price Changed

$1,575,000

$398/sq ft

May 7, 2020

Listed

$1,649,800

$416/sq ft

+32

Located in the exclusive town of Alamo on the west side, this one of a kind home offers breath-taking panoramic views of Mt. Diablo & the unrivaled landscape of Northern California's Bay Area. From the first glance, the quality craftsmanship & thoughtful architectural details stand out to make this home a rare masterpiece. Dramatic 18 ft vaulted wood beam ceilings run the length of the open floor plan & include the separate dining room. Every area has commanding views of Mt. Diablo & surrounding Valley. Additional features: top of the line kitchen appliances including a subzero refrigerator, media room, office. Balconies abound w/a lovely 2nd-floor spa facing Mt Diablo w/breath-taking views. This lovely home has an expansive master bedroom/bath, includes a walk-in glass block shower & separate soaking tub. Amenities: dedicated laundry room, central vacuum, dual-zone HVAC w/electronic filters, dual pane windows, newer 6-year old roof, 4-car gar w/lift. Close proximity to top schools.

bridgeMLS, Bay East AOR, or Contra Costa AOR #40853537

Nov 22, 2019

Listing Removed

—

Nov 12, 2019

Price Changed

Sep 14, 2019

Price Changed

Jul 18, 2019

Price Changed

Jun 27, 2019

Price Changed

Jun 7, 2019

Price Changed

May 3, 2019

Price Changed

Apr 10, 2019

Price Changed

Mar 20, 2019

Price Changed

Feb 15, 2019

Listed

Public Records

Oct 5, 1989

Sold

$230,000

$58/sq ft

Year

Property tax

Land + Additions

Assessment*

2025

$19,389 (+1.4%)

$800,457 + $900,222

$1,700,679

2024

$19,129 (+2.4%)

$784,762 + $882,571

$1,667,333

2023

$18,675 (+6.5%)

$769,375 + $865,266

$1,634,641

2022

$17,527 (+2.7%)

$754,290 + $848,300

$1,602,590

2021

$17,068 (+42.8%)

$739,500 + $765,000

$1,504,500

2020

$11,955 (+1.1%)

$725,000 + $750,000

$1,475,000

2019

$11,823 (+3.5%)

$386,894 + $617,957

$1,004,851

2018

$11,424 (+1.9%)

$379,308 + $605,841

$985,149

2017

$11,216 (+1.9%)

$364,580 + $582,316

$946,896

2016

$11,008 (+2.3%)

$364,580 + $582,316

$946,896

2015

$10,758 (+1.1%)

$357,432 + $570,899

$928,331

2014

$10,636 (+1.4%)

$345,168 + $551,309

$896,477

2013

$10,494 (+3.2%)

$345,168 + $551,309

$896,477

2012

$10,169 (+1.5%)

$343,609 + $548,818

$892,427

2011

$10,018 (+1.3%)

$336,872 + $538,057

$874,929

2010

$9,885 (+1.2%)

$330,267 + $527,507

$857,774

2009

$9,765 (+1.4%)

$327,799 + $523,565

$851,364

2008

$9,631

$328,578 + $524,809

$853,387

Public record

Public record
Permits

Beds

Baths

Stories

Lot width

—

Lot depth

—

Lot size

1.17 Acres

Year renovated

2000

Finished Sq. Ft.

3,962

Unfinished Sq. Ft.

—

Total Sq. Ft.

3,962

Year built

1991

Style

Single Family Residential

County

Contra Costa County

APN

1883920181

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Jul 13, 2026.

May 13, 2024 • Final

Building - residential mechanical

Replace the heat pump and air handler on a residential building. A HERS report may be required at the final inspection.

HVAC

May 13, 2024 • Final

Building - residential electrical

Add a new electrical circuit.

Electrical

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.

Climate risks

1/10 Flood Factor

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

4/10 Fire Factor

0.93% chance of being in a wildfire in next 30 years

3/10 Heat Factor

7 days above 96° expected this year, 15 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, 17 days in 30 years

Provided by First Street

Historical weather

Alamo, CA • 94507

Average low and high temperatures (°F)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

87/ 100

Very good sunlight

Sunscore

There appears to be minimal shading by surrounding buildings, terrain, and vegetation.

8.8 hrs

6.1 hrs

JuneDecember

Provided by Shadowmap

Redfin Estimate for 321 Castle Crest Rd

$2,668,650

$19K under list price of $2.69M

Nearby comparable homes

The Redfin Estimate uses 6 recent nearby sales, priced between $2.4M to $3.3M.

SOLD AUG 5, 2026
$2,410,000 Last sold price
5 beds3 baths3,570 sq ft
20 Monte Crest Ct, Walnut Creek, CA 94595
$3/sq ft
smaller lot
7 years newer
BOUGHT WITH REDFIN APR 17, 2026
$3,090,000 Last sold price
4 beds3 baths3,746 sq ft
1496 Finley Ln, Alamo, CA 94507
$147/sq ft
smaller lot
49 years older
SOLD JUN 12, 2026
$3,125,000 Last sold price
5 beds3.5 baths3,708 sq ft
1333 Laverock Ln, Alamo, CA 94507
$165/sq ft
smaller lot
19 years newer
SOLD APR 17, 2026
$3,295,000 Last sold price
5 beds3.5 baths3,022 sq ft
8 Simo St, Alamo, CA 94507
$412/sq ft
smaller lot
32 years older
SOLD JUN 16, 2026
$3,100,000 Last sold price
5 beds4 baths3,688 sq ft
2064 Celeste Ave, Walnut Creek, CA 94596
$163/sq ft
smaller lot
39 years older
SOLD JUN 4, 2026
$2,357,000 Last sold price
4 beds4 baths4,142 sq ft
612 Sugarloaf Ct, Walnut Creek, CA 94596
$109/sq ft
smaller lot
9 years newer

Rental earnings

Est. $8,018 per month, based on comparable rentals

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(925) 308-5237

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New listings for sale in 94507

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Details provided by bridgeMLS, Bay East AOR, or Contra Costa AOR and may not match the public record. Learn more.

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GreatSchools Ratings provided by GreatSchools.org.

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About this home

Payment calculator

Mortgage resources

See this home in person

Nearby open houses (10)

Around this home

Schools

Offer insights

Property details

Sale and tax history for 321 Castle Crest Rd

Public record

Climate risks

Historical weather

Sun exposure

Redfin Estimate for 321 Castle Crest Rd

Early Access listings

Nearby similar homes

New listings for sale in 94507

More real estate resources