Google satellite image for 621 Hardcastle Ct, San Ramon, CA 94583

Off market

$3,385,480

•

6 ba

•

5,034

sq ft

621 Hardcastle Ct, San Ramon, CA 94583

About this home

621 Hardcastle Ct is a 5,034 square foot house on a 0.34 acre lot with 5 bedrooms and 6 bathrooms. Based on Redfin's San Ramon data, we estimate the home's value is $3,385,480.

Single-familyProperty Type

2002Year Built

0.34 acresLot Size

$673Est. Price/Sq.Ft.

3 car garageParking

Source:Public Records

Redfin Estimate

$3,385,480

$33K since October

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 38.7% higher than the average sale price ($2.44M) 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 OCT 15, 2026
$2,775,000
B
4 beds4.5 baths4,279 sq ft
3309 Ashbourne Cir, San Ramon, CA 94583
SOLD NOV 2, 2026
$2,505,000
C
5 beds2.5 baths3,485 sq ft
5 Welford Ranch Ct, San Ramon, CA 94583
SOLD AUG 25, 2026
$1,870,000
D
4 beds3 baths2,776 sq ft
204 Lasso Cir, San Ramon, CA 94583
SOLD AUG 28, 2026
$2,365,000
E
4 beds3 baths3,000 sq ft
6013 Westside Dr, San Ramon, CA 94583
SOLD OCT 15, 2026
$2,475,000
F
5 beds4.5 baths3,484 sq ft
3 Crested Oak Ct, San Ramon, CA 94583

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Earn from this home

Sell

$3,206,742

Est. take-home

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Rent

$8,305/mo

Redfin rental estimate

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Market trends in 94583, CA

Last updated October 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-list price

100.0%

+0.7% MoM

Median sale price

$1.4M

$50K MoM

Avg. days on market

29d

7 days MoM

Recently sold homes

0 MoM

New listings for sale

$375,000
1 bed1 bath612 sq ft
9072 Craydon Cir, San Ramon, CA 94583
3D WALKTHROUGH
$1,890,000
4 beds2.5 baths2,337 sq ft
711 Pradera Way, San Ramon, CA 94583
COMING SOON
$1,799,000
4 beds2.5 baths2,760 sq ft
2445 Camino De Jugar, San Ramon, CA 94583
SHORT SALE
$379,000
1 bed1 bath624 sq ft
225 Reflections Dr #24, San Ramon, CA 94583
PMZ Real Estate
$1,299,900
4 beds2 baths1,883 sq ft
804 Bolivar Pl, San Ramon, CA 94583
$1,599,000
4 beds3.5 baths2,121 sq ft
1002 Sinopia Ter, San Ramon, CA 94583
$999,999
4 beds2 baths1,812 sq ft
217 Kent Pl, San Ramon, CA 94583
3D WALKTHROUGH
$1,328,888
4 beds2 baths1,812 sq ft
7527 Blue Fox Way, San Ramon, CA 94583
COMING SOON
$1,250,000
4 beds2.5 baths1,936 sq ft
211 Forest Creek Ln, San Ramon, CA 94583
EARLY ACCESS
$2,699,888
5 beds4 baths3,342 sq ft
6007 Westside Dr, San Ramon, CA 94583
See all

Provided by Redfin

Sale history for 621 Hardcastle Ct

As the MLS and public records start to fill up, we'll list the details here.

Year

Property tax

Land + Additions

Assessment*

2026

$27,130 (+3.2%)

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

$2,170,454

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*

2026

$27,130 (+3.2%)

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

$2,170,454

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.

Zoning and permits

Zoning
Permits

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

Interior

Room Information
# of Rooms: 13

Exterior

Pool Information
Has Pool

Property Information
Subdivision Name: SUBDIVISION 7575
Living Sq. Ft: 5,034
Ground Floor Sq. Ft: 2,776
Building Sq. Ft: 5,034
# of Stories: 2
Legal Description: T7575 L56

Parking & Garage Information
Garage/Parking Sq. Ft: 867

Lot Information
# of Buildings: 1
Land Sq. Ft: 15,000
Legal Lot Number: 56
Acres: 0.3444
Zoning Code: P-1
County Use Description: SINGLE FAMILY DETACHED WITH MA

Financial

Assessor Information
Assessment Year: 2026

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 Oct 30, 2026

Around this home

Schools

K - 12
Preschool & daycare

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

$3.22M – $3.89M

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Listing provided by Zillow

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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 \| 5 Baths \| 4524 Sq. Ft.	$3,265,154
616 Hardcastle Ct, San Ramon, CA 4 Beds \| 5 Baths \| 4193 Sq. Ft.	$2,587,639
624 Hardcastle Ct, San Ramon, CA 5 Beds \| 5.5 Baths \| 4613 Sq. Ft.	$3,239,419
607 Hardcastle Ct, San Ramon, CA 5 Beds \| 5 Baths \| 4524 Sq. Ft.	$2,806,855
530 Kingsbridge Ct, San Ramon, CA 5 Beds \| 5.5 Baths \| 5400 Sq. Ft.	$3,262,215
3588 Ashbourne Cir, San Ramon, CA 5 Beds \| 4 Baths \| 4193 Sq. Ft.	$2,924,507
512 Kingsbridge Ct, San Ramon, CA 5 Beds \| 6 Baths \| 5303 Sq. Ft.	$3,163,837

Address	Redfin Estimate
615 Hardcastle Ct, San Ramon, CA 5 Beds \| 5 Baths \| 4524 Sq. Ft.	$2,880,211
627 Hardcastle Ct, San Ramon, CA 4 Beds \| 4 Baths \| 4193 Sq. Ft.	$2,684,082
633 Hardcastle Ct, San Ramon, CA 5 Beds \| 4 Baths \| 4193 Sq. Ft.	$2,753,426
636 Hardcastle Ct, San Ramon, CA 5 Beds \| 4 Baths \| 4013 Sq. Ft.	$2,505,629
3545 Ashbourne Cir, San Ramon, CA 5 Beds \| 5 Baths \| 4524 Sq. Ft.	$2,890,547
518 Kingsbridge Ct, San Ramon, CA 5 Beds \| 6 Baths \| 5303 Sq. Ft.	$3,219,430
524 Kingsbridge Ct, San Ramon, CA 5 Beds \| 5 Baths \| 4523 Sq. Ft.	$3,298,468

Address	Redfin Estimate
600 Hardcastle Ct, San Ramon, CA 5 Beds \| 5 Baths \| 4524 Sq. Ft.	$2,859,898
608 Hardcastle Ct, San Ramon, CA 5 Beds \| 6 Baths \| 5299 Sq. Ft.	$3,004,239
601 Hardcastle Ct, San Ramon, CA 5 Beds \| 6 Baths \| 5034 Sq. Ft.	$2,978,249
630 Hardcastle Ct, San Ramon, CA 5 Beds \| 4 Baths \| 4568 Sq. Ft.	$3,004,972
506 Kingsbridge Ct, San Ramon, CA 4 Beds \| 3 Baths \| 3242 Sq. Ft.	$2,314,264
3575 Ashbourne Cir, San Ramon, CA 5 Beds \| 6 Baths \| 5034 Sq. Ft.	$3,046,045
3569 Ashbourne Cir, San Ramon, CA 5 Beds \| 6 Baths \| 5303 Sq. Ft.	$2,214,465

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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

Zoning and permits

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