3249 Mount Diablo Ct, Lafayette, CA 94549 Property Records

Contra Costa County property record for 3249 Mount Diablo Ct, Lafayette, CA 94549

Property Summary

Property Type	Commercial Office
Details	9,924 sqft · built 1977
Lot Size	0.59 acres (25,700 sqft)
Owner	Company Name on Record
Last Sale	$4,090,000 (May 2019)
Tax Bill	$53,190 (2025)
Deeds & Mortgages	Aug 2019 Mortgage May 2019 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`233-133-023-9`

Property Details

APN / Parcel Number

Primary APN	`233-133-023-9`
Alternative APNs	`233-133-023` `2331330221`

Interior

Total Rooms	10 Rooms
Stories	1 Story
Building Area	9,924 sqft Gross Area
1st Floor Area	9,924 sqft

Exterior

Year Built	Built 1977
Effective Year Built	Effective 1979
Lot Area	25,700 sqft (0.59 acres)

Location & Zoning

Street Address	3249 MT DIABLO CT, 104
City	LAFAYETTE
State	CA
Zip	94549-4039
Property Category	Commercial
Property Type	Commercial > Office > Commercial Office
Legal Description	POR ACALANES CENTER SUBN & TR ADJ
Legal Subdivision	POR ACALANES CENTER SUB
Legal Lot Number	44
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	1
Census Block	1005
Census Tract	349000

Owner

Source: Contra Costa County records, as of July 14, 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	Company Name on Record
Mailing Address	3249 MT DIABLO CT, 202, LAFAYETTE, CA 94549-4050
Owner Type	Company
Vesting	Company

Deeds, Mortgages & Sale History

Date	Document
Aug 12, 2019	Deed of Trust, Mortgage HERITAGE BK/COMMERCE
May 1, 2019	Grant Deed, Transfer HAIST FAMILY TRUST (PT)

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	May 1, 2019 · Amount on Record
Deed Sale	May 1, 2019 · Amount on Record
Deed Document Number	201961559
Prior Transfer Date	Sep 10, 1999
Prior Transfer Doc	0000246805
Record Updated	Oct 29, 2026

August 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	3249 MT DIABLO CT, LAFAYETTE, CA 94549-4084
Document Number	0000132481
Instrument Date	Aug 12, 2019
Transaction Type	Mortgage
Record Updated	Aug 27, 2019
Title Company	CHICAGO TITLE COMPANY, CHICAGO TITLE CO

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	1330 EL CURTOLA BLVD HAYWARD CA 94540, HAYWARD, CA 94540

Mortgage

Document Number	0000132481
Date	Aug 20, 2019
Instrument	132481

Lender

Name	HERITAGE BK/COMMERCE
Type	Bank
Address	150 ALMADEN BLVD, SAN JOSE, CA 95113-2000

Agreement

Amount	Amount Recorded

May 2019: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	May 1, 2019
Property Address	3249 MT DIABLO CT, LAFAYETTE, CA 94549-4084
Document Number	0000061559
Instrument Date	Apr 22, 2019
Instrument	61559
Transaction Type	Transfer
Record Updated	May 21, 2019
Title Company	CHICAGO TITLE COMPANY, CHICAGO TITLE CO

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$4,499.00
Amount Accuracy	Full Value
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	3249 MT DIABLO CT #202 LAFAYETTE CA 945494050, 202, LAFAYETTE, CA 94549-4050

Mortgage

Document Number	61560
Date	May 1, 2019
Instrument	61560

Lender

Name	HAIST FAMILY TRUST (PT)
Address	3249 MT DIABLO CT # 209, LAFAYETTE, CA 94549-4048

Agreement

Amount	Amount Recorded

Tax Assessment & Valuation

Source: Contra Costa County assessment roll, as of July 14, 2026

Property Jurisdictions

Type	Name
State	California
County	Contra Costa County
Municipality	Lafayette City
Secondary School District	Acalanes Union High School District (09 - 12)
Elementary School District	Lafayette Elementary School District (KG - 08)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$4,653,718 (+2%) Land $2,193,164 Building $2,460,554
2025	$53,190.00 (+6.27%)	$4,562,469 (+4.04%) Land $2,150,161 Building $2,412,308
2023	$50,052.00 (+0.98%)	$4,385,304 Land $2,066,668 Building $2,318,636
2022	$49,568.00

Assessed value is set for property tax purposes and is not a market price estimate.

Flood

Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Policies	9 in force
Nearby Flood Claims	9 (1978–2017)
Claims Outside the SFHA	3 of 9
Most Recent Claim	Jan 2017 · Severe Winter Storms, Flooding, And Mudslides
Claims by Event	Severe Winter Storms And Flooding, Feb 1998 · 2 claims

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.

Wildfire

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Low lower than 64% of the US · lower than 79% of California
Wildfire Likelihood	0.05% annual chance
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	EAST BAY MUD serves 1,468,000 people · EPA ID CA0110005
Water Source	Surface water
Last State Inspection	Dec 2021
Lead	Under 1 ppb (2022–2024) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	None last 3 years

Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes. This system sells water to local utilities; the supplier billing this address may be one of them.

Internet Providers

Source: FCC Broadband Data Collection, based on 345 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Unwired Fixed Wireless	300 / 25
T-Mobile Fixed Wireless	100 / 20
AT&T DSL · Fiber in parts of the area	100 / 20

May also be available: Etheric Networks, Verizon.

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