SOLD OCT 8, 2026

Sold on oct 2026

$2,528,500

•

3,962

sq ft

321 Castle Crest Rd, Alamo, CA 94507

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About this home

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.

Single-familyProperty Type

1991Year Built

1.17 acresLot Size

$638Price/Sq.Ft.

4 car garageParking

Listed by Carolyn Gwynn •DRE #01888136 • Compass

Bought with Christy Zoerner •DRE #01880044 • Dudum Real Estate Group

Redfin checked: 2 minutes ago

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

Redfin Estimate

$2,588,787

$60K since sold in October 2026$1,000 since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 6.3% lower than the average sale price ($2.76M) of 6 comparable homes.

SOLD AUG 7, 2026
$1,798,000
A
5 beds4.5 baths3,548 sq ft
58 Saddle Rd, Walnut Creek, CA 94595
SOLD SEP 29, 2026
$1,630,000
B
6 beds3 baths3,074 sq ft
59 Saddle Rd, Walnut Creek, CA 94595
SOLD JUN 15, 2026
$2,050,000
C
5 beds3 baths3,465 sq ft
34 Sugarloaf Ter, Alamo, CA 94507
SOLD APR 28, 2026
$3,900,000
D
6 beds4 baths3,659 sq ft
2490 Lunada Ln, Alamo, CA 94507
SOLD JUL 29, 2026
$4,075,000
E
5 beds4.5 baths5,000 sq ft
79 Jennifer Ln, Alamo, CA 94507
SOLD JUN 12, 2026
$3,125,000
F
5 beds3.5 baths3,708 sq ft
1333 Laverock Ln, Alamo, CA 94507

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Market trends in 94507, CA

Last updated September 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-list price

101.6%

0.3% MoM

Median sale price

$3.2M

$199K MoM

Avg. days on market

24d

3 days MoM

Recently sold homes

5 MoM

New listings for sale

OPEN SUN, 2PM TO 5PM
$4,498,000
5 beds5.5 baths4,344 sq ft
201 Austin Ln, Alamo, CA 94507
OPEN SAT, 2PM TO 4PM
$3,999,999
5 beds5 baths5,289 sq ft
1439 Vine Ln, Alamo, CA 94507
OPEN SUN, 1PM TO 4PM
$2,425,000
4 beds4.5 baths3,666 sq ft
116 Mystic Pl, Alamo, CA 94507
$8,500,000
12 beds6.5 baths8,699 sq ft
512 Hemme Ave, Alamo, CA 94507
EARLY ACCESS
$12,500,000
10 beds13 baths15,000 sq ft
1021 Via del Gato, Alamo, CA 94507
$3,898,000
5 beds4.5 baths4,525 sq ft
370 Golden Grass Dr, Alamo, CA 94507
OPEN SAT, 1PM TO 4PM
$2,749,000
4 beds3.5 baths3,752 sq ft
86 Royal Ridge Ct, Alamo, CA 94507
$850,000
2 beds2.5 baths1,757 sq ft
318 Alamo Sq, Alamo, CA 94507
$3,499,000
5 beds5 baths3,678 sq ft
2973 Limestone Rd, Alamo, CA 94507
COMING SOON
$6,790,000
5 beds5.5 baths5,135 sq ft
10 Corwin Dr, Alamo, CA 94507
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Rental estimate

Est. $8,264 per month, based on comparable rentals

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

Oct 8, 2026

Sold

$2,528,500

$638/sq ft

Sep 30, 2026

Pending

—

Sep 20, 2026

Contingent

—

Sep 5, 2026

Price Changed

$2,524,900

$637/sq ft

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

—

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

—

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

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 Oct 16, 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.

Property details

Parking

Parking Information
Garage Spaces: 4
Covered Spaces: 4
Parking Features: Attached

Interior

Bathroom Information
# of Bathrooms Total: 5
# of Bathrooms Full: 4
# of Bathrooms Partial: 1

Interior Features
Interior Features: Family Room, Formal Dining Room, Pantry, Updated Kitchen
Appliances: Dishwasher, Double Oven, Gas Range, Microwave, Oven, Refrigerator, Dryer, Washer, Gas Water Heater
Laundry Features: Dryer, Laundry Room, Washer
Upper Level Features: 1 Bedroom, 0.5 Bath, Primary Bedrm Suite - 1
Street Level Features: 3 Bedrooms, 3 Baths, Main Entry
Window Features: Double Pane Windows
Flooring: Hardwood Flrs Throughout

Room Information
Kitchen Features: Stone Counters,Dishwasher,Double Oven,Eat-in Kitchen,Disposal,Gas Range/Cooktop,Kitchen Island,Microwave,Oven Built-in,Pantry,Refrigerator,Updated Kitchen
Rooms Total: 12
Room Type: Family Room, Formal Dining Room, Eat-In Kitchen, Media Room, Kitchen, Laundry, Living Room, Primary Bedrooms 2+

Exterior

Building Information
Construction Materials: Wood Siding
Building Area Total: 3,962
Foundation Details: Raised

Exterior Features
Patio And Porch Features: Deck
Exterior Features: Front Yard
Roof: Shingle

Property Information
Living Area: 3962
Living Area Units: Square Feet
Property Type: Residential
Property Sub Type: Single Family Residence
Year Built: 1991

Lot Information
Lot Size Square Feet: 50965
Lot Size Area: 1.17
Lot Size Units: Acres
Lot Size Acres: 1.17
Lot Features: Cul-De-Sac, Sloped Down

Utilities

Utility Information
Water Source: Public
Electric: Photovoltaics Seller Owned
Sewer: Public Sewer

Heating & Cooling
Has Heating
Heating: Zoned
Cooling: Central Air

Public facts

Beds: 4
Baths: 5.0
Sq. Ft.: 3,962
Stories: 2.0
Lot Size: 1.17 acres
Style: Single Family Residential
Year Built: 1991
Year Renovated: 2000
County: Contra Costa County
APN: 1883920181

Home facts updated by county records on Oct 16, 2026

Around this home

Schools

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

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

This home receives average direct sun exposure in Alamo. There appears to be minimal shading by surrounding buildings, terrain, and vegetation.

8.8 hrs

6.1 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$2.46M – $2.98M

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Home values near 321 Castle Crest Rd

Data from public records.

Address	Redfin Estimate
320 Castle Crest Road, Alamo, CA 4 Beds \| 3.5 Baths \| 3771 Sq. Ft.	$2,811,543
364 Castle Crest Road #A, Alamo, CA 4 Beds \| 4 Baths \| 4610 Sq. Ft.	$2,850,000

Address	Redfin Estimate
315 Castle Crest Road, Alamo, CA 4 Beds \| 3 Baths \| 2820 Sq. Ft.	$2,364,726
353 Castle Crest Road, Alamo, CA 4 Beds \| 3.5 Baths \| 5422 Sq. Ft.	$3,510,937

Address	Redfin Estimate
376 Castle Crest Road, Alamo, CA 5 Beds \| 3 Baths \| 3187 Sq. Ft.	$2,535,323
361 Castle Crest Road, Alamo, CA 5 Beds \| 3 Baths \| 3180 Sq. Ft.	$2,662,947

Property information provided by bridgeMLS, Bay East AOR, or Contra Costa AOR when last listed in 2026. This data may not match . Learn more.

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GreatSchools Ratings provided by GreatSchools.org.

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321 Castle Crest Rd, Alamo, CA 94507

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About this home

Redfin Estimate

Market trends in 94507, CA

Homeowner tools

Sale and tax history for 321 Castle Crest Rd

Public record

Property details

Parking

Interior

Exterior

Utilities

Public facts

Around this home

Schools

Climate risks

Historical weather

Sun exposure

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New listings for sale in 94507

Home values near 321 Castle Crest Rd

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