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Property profile & analytics
OFF-MARKET
Estimated value
$12,995,000
Investment properties
20657 Golden Spgs Dr Diamond Bar, CA 91789-3875
Entity Owned
4-yr Hold
Absentee Owner
~
Est. High Equity
Property ID
US09-8520926
Property profile
Verified
Property type
Investment properties
Use group
STORE/OFFICE (MIXED USE)
Year built
2008
Construction
TILT-UP CONCRETE
Total area
52,647 SF
Lot
2.3 ac (100,271 SF)
Zoning code
LCA15000*
APN
8763-007-022
UPID
US09-8520926
Cap rate & NOI
Priority signal for investors
Implied cap rate, NOI & suggested price
Cap rate vs submarket · NOI estimate · 3 price anchors
Implied cap rate, NOI & suggested price
Cap vs submarket · NOI estimate · 3 price anchors
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
$9.42M
CAP Approach
CAP
$11.18M
Comparable Approach
Comparable
$16.66M
Blend (final)
Blend
$13.00M
Owner & transaction history
Gcm Asset LLC · 4 yrs held
Gcm Asset LLC
since 2022
Last sale
$13.5M
7 recorded transactions
Zoning & alternative use
LCA15000* · Diamond Bar, CA
Permitted uses
Permitted uses
Allowed · conditional · prohibited
Top alternative use upside
Office building
$21.1M
+22.0%
Warehouse, storage
$19.9M
+15.4%
Cap rate
Implied · in-place · derived from last sale + estimated NOI
Implied Cap rate
#1
Implied · in-place · NOI ÷ last sale
In-place · derived from last sale + estimated NOI
Cap rate, NOI & submarket benchmark
Implied cap rate vs Diamond Bar submarket · NOI estimate · Typical band, median & reading
Implied cap rate, NOI & submarket benchmark
Cap vs Diamond Bar submarket · NOI estimate · typical band, median & reading
Refine your cap rate
8-question underwriting flow
1.
Property current status — Going-In vs Stabilized
2.
Price for denominator — asking / offer / market
3.
Leasing status & lease structure (NNN / Gross)
4.
Tenant risk profile & vacancy assumption
5.
Upload T12 / rent roll / OM (optional)
Refine in 60 seconds, get exact suggested price
T12 upload · Submarket benchmarks · Sensitivity grid
Suggested price · 3 cap rate anchors
Income approach @ 5% / 7% / 9% — aggressive / typical / conservative
Suggested price at 5% / 7% / 9% cap
Aggressive / typical / conservative · Implied $/SF per anchor · Sensitivity grid
Suggested price at 5% / 7% / 9% cap
Aggressive / typical / conservative · implied $/SF · sensitivity
Value
AI, CAP & Alternative Use estimations · Realmo proprietary blendValue Estimations
Based on Realmo’s proprietary methodology
AI Approach
Method
Estimation
Statistic approach
$13,715,000
ML approach
$9,420,000
CAP Approach
CAP Return
Estimation
6%
$12,110,000
6.5%
$11,175,000
7%
$10,380,000
Alternative Use
Use
Estimation
COMMERCIAL (GENERAL)
$17,270,000
Current use
OFFICE BUILDING
$21,065,000
Change: +22% · Conversion: Easy
WAREHOUSE, STORAGE
$19,925,000
Change: +15% · Conversion: Difficult
AUTO REPAIR, GARAGE
$16,835,000
Change: -3% · Conversion: Difficult
RESTAURANT
$16,180,000
Change: -6% · Conversion: Difficult
Blend value · Realmo final
$13.00M
Range $11.70M – $14.29M · ±10% · vs last sale $13.50M (Feb 16 2022)
Last sale anchor
$13.50M
Feb 16 2022
Realmo estimate · informational only.
These numbers are calculated by our models from public records and may not reflect actual market value.
Not an appraisal.
Verify with a licensed appraiser before transacting. Realmo accepts no liability for divergence from real-world outcomes.
View the full estimation — every method, every assumption
Confidence drivers & risk notes · Custom comparable set · Free for first 3 / day
Full estimation methodology
Every method · every assumption · confidence drivers
Price per SF
Sale + rent benchmarks
Subject property
$247 / SF
Submarket sale & rent benchmarks
Median sale $/SF · Asking & closed rent · Submarket vacancy
Submarket sale & rent benchmarks
Median sale $/SF · asking & closed rent · submarket vacancy
Property tax & assessments
Tax year 2024Property tax & assessments
Tax year 2024
Tax billed
$203,450
Tax year 2024
Assessed value
$16,364,100
Assessed 2024
Previous assessed
$16,364,100
+0.0% YoY
Effective rate
1.24%
On assessed value
Assessed land
$5,408,219
Assessed improvement
$10,955,881
Applied tax rate
14.0000
Comparables
6 recent transactions · within 1.5 miComparable in this city
6 recent transactions
Comparable in this City
Similar Nearby for Sale
Similar Nearby for Lease
Recent comparable sales
Sale price & price/SF · Sale date & distance · Adjustments & confidence
Recent comparable sales
Sale price & $/SF · sale date & distance · adjustments
Property description
Physical attributes from public recordsBuilding & lot
Public records
Property type
Investment properties
Use group
STORE/OFFICE (MIXED USE)
Status
Off-Market
Year built
2008
Construction
TILT-UP CONCRETE
Heating
NONE
Stories
1
Bathrooms
1
Total area
52,647 SF
Lot
2.3 ac (100,271 SF)
Zoning code
LCA15000*
APN
8763-007-022
UPID
US09-8520926
Jurisdiction
LOS ANGELES
Metro division
LOS ANGELES-LONG BEACH-GLENDALE, CA METROPOLITAN DIVISION
Zoning & alternative use
LCA15000* · Diamond Bar, CA
Zoning LCA15000* · permitted uses
LCA15000* · Diamond Bar, CA
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Permitted & conditional uses
Allowed · special-permit conditions · prohibited
Diamond Bar. Always verify with local authorities before improvements.
Alternative use value scenarios
Repositioning upside vs current use
COMMERCIAL (GENERAL) Current
Est. value
$17.3M
OFFICE BUILDING
Est. value
$21.1M
WAREHOUSE, STORAGE
Est. value
$19.9M
AUTO REPAIR, GARAGE
Est. value
$16.8M
RESTAURANT
Est. value
$16.2M
COMMERCIAL (GENERAL) Current
OFFICE BUILDING
WAREHOUSE, STORAGE
AUTO REPAIR, GARAGE
RESTAURANT
Alternative use deep dive — conversion cost, permits, timeline
Conversion cost estimate · Permit path & risks · Stabilized NOI per option
Alternative use deep dive
Conversion cost · permit path · stabilized NOI per option
Building & site characteristics
From public records
Year built
2008
Construction
TILT-UP CONCRETE
Heating
NONE
Stories
1
Bathrooms
1
Lot
2.3 ac
Current owner
From public records · entity-resolved
Gcm Asset LLC
Entity
Mailing address
19223 COLIMA RD #938, ROWLAND HEIGHTS, CA 91748-3005
Mailing matches property
Different — outreach signal
Owner-occupied
No
Ownership since
2022
Owner contacts — direct phone, email, and related entities
Decision-maker phone · Verified email · Related entities & filings
Owner contacts
Email · phone · related entities
Sales History
20 recorded events · public records
Date
Price
Buyer
Seller
Deed Type
Mortgage
Mar 22, 2022
—
Gcm Asset LLC
—
Deed
related
$11,500,000 · Ctbc Bank Corp USA
Feb 16, 2022
—
Gcm Asset LLC
Golden Springs Asset LLC
Quit Claim Deed
related
—
May 12, 2016
—
Golden Springs Asset LLC
Golden Springs Asset LLC
Quit Claim Deed
related
—
Dec 16, 2013
—
Golden Springs Asset LLC
Apex Capital Investment Corp
Quit Claim Deed
—
Aug 14, 2013
$13,500,135
Apex Capital Investment Corp
Golden Springs Plaza LLC
Grant Deed
$9,000,000 · East West Bank
Jun 8, 2009
$12,790,311
Golden Springs Plaza LLC
Chicago Title Co
Trustees Deed
related
—
May 1, 2006
—
Eden Dongsan Investments INC
—
Trustees Deed
related
$13,000,000 · Saehan Bank
Mar 31, 2003
$2,000,000
Edgen Dogsan Investments INC
Diamond Bar Project Co
Grant Deed
—
Jun 1, 2001
—
Db Project
Db,project
Quit Claim Deed
related
—
Aug 3, 1993
—
Bar Diamond Project
Hou,chin Y & Su
Quit Claim Deed
related
—
Mar 4, 1993
—
Chin Y Hou
Diamond Bar Proj
Grant Deed
related
—
Sep 14, 1992
—
Bar Diamond Project
—
Deed Of Trust
related
—
Mar 23, 1992
—
Hou Chin Y
—
Deed Of Trust
related
—
—
—
Golden Springs Plaza LLC
—
Deed Of Trust
related
$6,000,000 · Saehan Bank
—
—
Golden Springs Plaza LLC
—
Deed Of Trust
related
$5,500,000 · First General Bank
—
—
Min D Kim
—
Deed Of Trust
related
$100,000 · Wilshire State Bank
—
—
Golden Springs Asset LLC
—
Loan Modification
related
—
—
—
Diamond Bar Project Co
—
Deed Of Trust
related
$220,000 · United National Bank
—
—
Bar Diamond Project
—
Deed Of Trust
related
$250,000 · Sumitomo Bank
—
—
Golden Springs Plaza LLC
—
Deed Of Trust
related
$400,000 · First General Bank
Coming soon
Costs & Benchmarks
Operating expenses, capex projections, utility benchmarks, and submarket comparables — all in one view.
Coming soon
Risks
Flood, climate, environmental, title, and tenant-concentration risk — surfaced with mitigations and source citations.
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