Property profile

660 Diamond Bar Blvd Diamond Bar, CA 91765

OFF-MARKET
Office buildings
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Property ID
US09-1109890
25,864 SF 1.42 ac Built 1982
Last sale Dec 2025·$725,000
Entity Owned Owner of record is a legal entity (LLC / corporation). Absentee Owner Owner mailing address differs from the property address. ~ Est. High Equity Modeled equity is high. Estimate, not a fact.
Market Trends Soon

Property summary

AI-generated overview

This exceptional 1,977 square foot executive office condo, located at 660 N Diamond Bar Blvd, Suite 128, Diamond Bar, CA 91765, presents a unique owner-user opportunity. Priced at $798,000 ($28.65/sq ft), this Class B property boasts a prime location in Los Angeles County, offering convenient access to the 60/57 freeways. Situated within a two-story building constructed in 1982 and extensively renovated between 2014 and 2015, the suite features a highly versatile layout including two large…

Ownership intelligence

Who controls the opportunity?

Owner of record from public deeds, plus portfolio, hold profile and investor signals where the data supports them. Included with a plan.

Owner contacts

Can we reach the decision maker?

Skip-traced phones and e-mails of the owner. Included with a plan.

Debts

What is owed, to whom, and when it comes due

Recorded lenders, amounts and estimated maturities of the owner's loan book — included with a plan.

Property tax

What does the county charge?
Assessed value · 2015$4.63M
Assessed land$3.16M
Assessed improvement$1.47M

Value estimate

· Nov 2026
$5.59M
$5.03M – $6.15M
CAP approach$6.85M
Submarket $/SF estimate$3.76M

Realmo valuation models over county records.

Recently sold

What actually traded nearby?
$510/SF
ZIP average, outlier-cleaned · 42 recorded sales of this use type
Observed band · Q1–Q3$430 – $660

Cap rate analysis

How does the asset earn?

No income signal is modeled for this parcel yet — the Cap Rates tab runs the workflow.

Zoning insight

What can be built here?
LCCM*
JurisdictionLOS ANGELES

Location intelligence

Which uses thrive at this corner?
Best fit: Restaurant
Demand heat for this use is drawn on the map · LocInt grid
Demand index
Restaurant22.5
Gym & Fitness19.8
Storage Facility18.2

Location

660 Diamond Bar Blvd Diamond Bar, CA 91765-1008
County assessor Recorded deeds · 21 transfers Qualifying comp sales · not on file Zoning catalog

Every figure names its source: public record, benchmark, or modeled. Coverage varies by property — thin data is stated as missing, never invented.

Comparables

6 recorded sales · 15 properties nearby
Recent sales nearby
6 recorded sales in this ZIP, last 8 years
Address Sale price Sold Size
21308 Pathfinder, Diamond Bar, CA 91765-2761 $2,585,025 Feb 2023 15,358 SF
1930 Brea Cyn, Diamond Bar, CA 91765-4009 $3,850,038 Jan 2023 22,080 SF
1950 Brea Cyn, Diamond Bar, CA 91765-4015 $3,460,034 May 2022 9,230 SF
1350 Vly Vis, Diamond Bar, CA 91765-3910 $3,900,039 Nov 2021 12,800 SF
1370 Vly Vis, Diamond Bar, CA 91765-3911 $22,250,222 Jun 2019 51,686 SF
1340 Vly Vis, Diamond Bar, CA 91765-3913 $3,100,031 Jun 2019 11,400 SF
Sale prices and dates as our records hold them, one row per building. A deed can cover more of a building than the size shown, so read the price against the size rather than dividing one by the other.
Comparable nearby
6 properties of the same type nearby
Research This Page with AI

Rey answers here. ChatGPT, Grok and Claude get the same data packet.

Includes: Price & PSF · Cap rate · Location · Zoning

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