OFF MARKET

Off Market Feb 2013 for $1.7M

$3,438,012

•

5,034

sq ft

621 Hardcastle Ct, San Ramon, CA 94583

About this home

Single-familyProperty Type

2002Year Built

0.34 acresLot Size

$683Est. Price/Sq.Ft.

3 car garageParking

Listed by Sally Thornber •DRE #01110608 • Lure Fine Real Estate

Listed by Sylvana Wong •DRE #01297610 • Lure Fine Real Estate

Bought with Catherine Zhang •DRE #01243336 • BHG Mason-McDuffie Real Estate

Redfin checked: a few seconds ago

•Source:bridgeMLS, Bay East AOR, or Contra Costa AOR #40599928

Redfin Estimate

$3,438,012

$1.7M since sold in February 2013$159K since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 24% higher than the average sale price ($2.77M) of 6 comparable homes.

SOLD SEP 4, 2026
$2,650,000
A
4 beds4.5 baths4,510 sq ft
243 Lyndhurst Pl, San Ramon, CA 94583
SOLD AUG 25, 2026
$1,870,000
B
4 beds3 baths2,776 sq ft
204 Lasso Cir, San Ramon, CA 94583
SOLD AUG 28, 2026
$2,365,000
C
4 beds3 baths3,000 sq ft
6013 Westside Dr, San Ramon, CA 94583
SOLD OCT 31, 2025
$3,585,000
D
5 beds5.5 baths5,017 sq ft
3394 Ashbourne Cir, San Ramon, CA 94583
SOLD SEP 19, 2025
$3,500,000
E
5 beds5.5 baths5,312 sq ft
3388 Ashbourne Cir, San Ramon, CA 94583
SOLD MAY 1, 2026
$2,665,000
F
5 beds3.5 baths3,503 sq ft
17 Pine Valley Pl, San Ramon, CA 94583

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Earn from this home

Sell

$2,306,516

Est. take-home

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Rent

$8,953/mo

Redfin rental estimate

List your home for rent

Market trends in 94583, CA

Last updated August 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

99.3%

0.3% MoM

Median sale price

$1.4M

$49K MoM

Avg. days on market

22d

0 days MoM

Recently sold homes

7 MoM

New listings for sale

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COMING SOON
$1,698,000
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3704 Anderhan Pl, San Ramon, CA 94583
COMING SOON
$540,000
3 beds2 baths1,308 sq ft
9025 Alcosta Blvd #259, San Ramon, CA 94583
OPEN SAT, 1PM TO 4PM
$2,575,000
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OPEN SAT, 1PM TO 4PM
$1,799,000
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4 beds2.5 baths1,936 sq ft
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HOT HOME
$1,499,000
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VIDEO TOUR
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See all

Provided by Redfin

Sale history for 621 Hardcastle Ct

Year

Property tax

Land + Additions

Assessment*

2025

$26,282 (+2.1%)

$1,004,840 + $1,165,614

$2,170,454

2024

$25,747 (+1.5%)

$985,138 + $1,142,759

$2,127,897

2023

$25,370 (+3.2%)

$965,822 + $1,120,352

$2,086,174

2022

$24,582 (−2.0%)

$946,885 + $1,098,385

$2,045,270

2021

$25,080 (+0.9%)

$928,319 + $1,076,849

$2,005,168

2020

$24,858 (+1.1%)

$910,117 + $1,055,735

$1,965,852

2019

$24,592 (+3.6%)

$900,785 + $1,044,910

$1,945,695

2018

$23,734 (+3.6%)

$883,123 + $1,024,422

$1,907,545

2017

$22,901 (+1.2%)

$848,831 + $984,644

$1,833,475

2016

$22,634 (+1.0%)

$848,831 + $984,644

$1,833,475

2015

$22,407 (+0.9%)

$832,188 + $965,338

$1,797,526

2014

$22,202 (+6.5%)

$803,632 + $932,213

$1,735,845

2013

$20,847 (+17.0%)

$803,632 + $932,213

$1,735,845

2012

$17,820 (−5.2%)

$659,814 + $958,867

$1,618,681

2011

$18,792 (+16.2%)

$535,823 + $778,677

$1,314,500

2010

$16,167 (−12.1%)

$574,139 + $834,361

$1,408,500

2009

$18,400 (−5.6%)

$476,922 + $693,078

$1,170,000

2008

$19,498

$570,676 + $829,324

$1,400,000

Tax history for 621 Hardcastle Ct

Year

Property tax

Land + Additions

Assessment*

2025

$26,282 (+2.1%)

$1,004,840 + $1,165,614

$2,170,454

2024

$25,747 (+1.5%)

$985,138 + $1,142,759

$2,127,897

2023

$25,370 (+3.2%)

$965,822 + $1,120,352

$2,086,174

2022

$24,582 (−2.0%)

$946,885 + $1,098,385

$2,045,270

2021

$25,080 (+0.9%)

$928,319 + $1,076,849

$2,005,168

2020

$24,858 (+1.1%)

$910,117 + $1,055,735

$1,965,852

2019

$24,592 (+3.6%)

$900,785 + $1,044,910

$1,945,695

2018

$23,734 (+3.6%)

$883,123 + $1,024,422

$1,907,545

2017

$22,901 (+1.2%)

$848,831 + $984,644

$1,833,475

2016

$22,634 (+1.0%)

$848,831 + $984,644

$1,833,475

2015

$22,407 (+0.9%)

$832,188 + $965,338

$1,797,526

2014

$22,202 (+6.5%)

$803,632 + $932,213

$1,735,845

2013

$20,847 (+17.0%)

$803,632 + $932,213

$1,735,845

2012

$17,820 (−5.2%)

$659,814 + $958,867

$1,618,681

2011

$18,792 (+16.2%)

$535,823 + $778,677

$1,314,500

2010

$16,167 (−12.1%)

$574,139 + $834,361

$1,408,500

2009

$18,400 (−5.6%)

$476,922 + $693,078

$1,170,000

2008

$19,498

$570,676 + $829,324

$1,400,000

*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

0.34 Acres

Year renovated

2003

Sq. Ft.

5,034

Year built

2002

Style

Single Family Residential

County

Contra Costa County

APN

2112800285

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Jul 13, 2026.

P-1

WSSP

Planned Unit District

A large-scale integrated development or a general plan special area of concern provides an opportunity for, and requires cohesive design when flexible regulations are applied; whereas the application of conventional regulation, designed primarily for individual lot development, to a large-scale development or special area may create a monotonous and inappropriate neighborhood. The planned unit district is intended to allow diversification in the relationship of various uses, buildings, structures, lot sizes and open space while insuring substantial compliance with the general plan and the intent of the county code in requiring adequate standards necessary to satisfy the requirements of the public health, safety and general welfare. These standards shall be observed without unduly inhibiting the advantages of large-scale site or special area planning.

Zone overlays

Westside Specific Plan

Permitted uses

Include but are not limited to:

Housing-Single unit

Sep 15, 2003 • Final

Building/residential/p/pool

Install a new swimming pool and spa.

Pool and hot tub

Jun 28, 2002 • Final

Building/residential/r/new single family-duplex

Construct a new single-family home.

New construction

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
Has Attached Garage
Garage Spaces: 3
Covered Spaces: 3
Parking Features: Attached, Garage, Int Access From Garage, Garage Door Opener

Interior

Virtual Tour

Bathroom Information
# of Bathrooms Total: 6
# of Bathrooms Full: 5
# of Bathrooms Partial: 1
Other Bathrooms Included Features: Shower Over Tub, Stall Shower, Tile, Updated Baths
Primary Bathroom Included Features: Stall Shower, Tub with Jets, Updated Baths

Interior Features
Interior Features: Study, Breakfast Bar, Breakfast Nook, Counter - Solid Surface, Eat-in Kitchen, Kitchen Island, Pantry, Updated Kitchen, Central Vacuum
Appliances: Dishwasher, Double Oven, Disposal, Gas Range, Plumbed For Ice Maker, Microwave, Refrigerator, Self Cleaning Oven, Trash Compactor, Gas Water Heater
Laundry Features: 220 Volt Outlet, Hookups Only, Laundry Room
Upper Level Features: 3 Bedrooms, 4 Baths, Primary Bedrm Suite - 1
Street Level Features: 1 Bedroom, 1.5 Baths, Laundry Facility, No Steps to Entry, Main Entry
Window Features: Window Coverings
Fireplaces Total: 2
Has Fireplace
Flooring: Hardwood, Carpet

Room Information
Kitchen Features: 220 Volt Outlet,Breakfast Bar,Breakfast Nook,Counter - Solid Surface,Dishwasher,Double Oven,Eat In Kitchen,Garbage Disposal,Gas Range/Cooktop,Ice Maker Hookup,Island,Microwave,Pantry,Refrigerator,Self-Cleaning Oven,Trash Compactor,Updated Kitchen,Other
Rooms Total: 13
Fireplace Features: Family Room, Gas Starter, Living Room

Exterior

Building Information
Construction Materials: Stone, Stucco
Building Area Total: 5,034
Builder Name: TOLL BROTHERS
Foundation Details: Slab

Exterior Features
Patio And Porch Features: Patio
Exterior Features: Back Yard, Front Yard, Side Yard, Sprinklers Automatic, Terraced Up
Fencing: Fenced

Mobile Home Information
Model: ATHERTON

Pool Information
Pool Features: Gunite, In Ground
Has Private Pool

Property Information
Living Area: 5034
Living Area Units: Square Feet
Property Type: Residential
Property Sub Type: Single Family Residence
Year Built: 2002

Lot Information
Lot Size Square Feet: 15000
Lot Size Area: 0.3443
Lot Size Units: Acres
Lot Size Acres: 0.3443
Lot Features: Cul-De-Sac, Level, Regular, Sloped Up

Utilities

Utility Information
Water Source: Public
Electric: 220 Volts in Kitchen
Sewer: Public Sewer

Heating & Cooling
Has Heating
Heating: Zoned
Cooling: Zoned

Location

Homeowners Association Information
Has Association
Association Amenities: Greenbelt, Playground, Gated, Tennis Court(s)
Association Name: HOMEOWNER ASSN SERVICE
Association Fee: $145
Association Fee Includes: Common Area Maint, Management Fee, Reserves, Security/Gate Fee
Association Fee Frequency: Monthly
HOA Transfer Fees: Paid by Seller

School Information
High School District: San Ramon Valley (925) 552-5500

Public facts

Beds: 5
Baths: 6.0
Sq. Ft.: 5,034
Stories: 2.0
Lot Size: 0.34 acres
Style: Single Family Residential
Year Built: 2002
Year Renovated: 2003
County: Contra Costa County
APN: 2112800285

Home facts updated by county records on Jul 13, 2026

Around this home

Schools

Bollinger Canyon Elementary School

Public K-5 • Assigned • 1.3mi

10/10

Iron Horse Middle School

Public 6-8 • Assigned • 2.3mi

10/10

California High School

Public 9-12 • Assigned • 2.5mi

10/10

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

5/10 Fire Factor

4% chance of being in a wildfire in next 30 years

3/10 Heat Factor

7 days above 94° expected this year, 14 days in 30 years

1/10 Wind Factor

Minimal risk of severe winds over next 30 years

8/10 Air Factor

14 unhealthy days expected this year, 15 days in 30 years

Provided by First Street

Historical weather

San Ramon, CA • 94583

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 11.6 hours in June and 4.8 hours in December, placing it above the U.S. average for solar exposure.

11.6 hrs

4.8 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$3.27M – $3.95M

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Home values near 621 Hardcastle Ct

Data from public records.

Address	Redfin Estimate
639 Hardcastle Ct, San Ramon, CA 5 Beds \| 4.5 Baths \| 4600 Sq. Ft.	$3,445,438
616 Hardcastle Ct, San Ramon, CA 5 Beds \| 4 Baths \| 4193 Sq. Ft.	$2,668,148

Address	Redfin Estimate
615 Hardcastle Ct, San Ramon, CA 5 Beds \| 5 Baths \| 4524 Sq. Ft.	$3,009,006
627 Hardcastle Ct, San Ramon, CA 5 Beds \| 4 Baths \| 4193 Sq. Ft.	$2,817,130

Address	Redfin Estimate
600 Hardcastle Ct, San Ramon, CA 5 Beds \| 4.5 Baths \| 4946 Sq. Ft.	$3,039,347
608 Hardcastle Ct, San Ramon, CA 5 Beds \| 5.5 Baths \| 5299 Sq. Ft.	$3,196,717

Property information provided by bridgeMLS, Bay East AOR, or Contra Costa AOR when last listed in 2013. This data may not match . Learn more.

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GreatSchools Ratings provided by GreatSchools.org.

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About this home

Redfin Estimate

Earn from this home

Market trends in 94583, CA

Sale history for 621 Hardcastle Ct

Tax history for 621 Hardcastle Ct

Public record

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 94583

Home values near 621 Hardcastle Ct

More real estate resources