New search
Property profile & analytics
OFF-MARKET
Estimated value
$17,720,000
Office buildings
21700 Copley Dr, Diamond Bar, CA 91765-2297
Entity Owned
20-yr Hold
Absentee Owner
Free & Clear
Property ID
US09-6475064
Property profile
Verified
Property type
Office buildings
Use group
OFFICE BUILDING (MULTI-STORY)
Year built
1990
Construction
WOOD
Total area
80,026 SF
Lot
6.89 ac (300,279 SF)
Zoning code
LCR110000*
APN
8293-050-041
UPID
US09-6475064
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
by Request
CAP Approach
CAP
$21.19M
Comparable Approach
Comparable
$14.87M
Blend (final)
Blend
$17.72M
Owner & transaction history
Muller-ing LLC · 20 yrs held
Muller-ing LLC
since 2005
6 recorded transactions
Zoning & alternative use
LCR110000* · Diamond Bar, CA
Permitted uses
Permitted uses
Allowed · conditional · prohibited
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
by Request
ML approach
by Request
CAP Approach
CAP Return
Estimation
6%
$22,960,000
6.5%
$21,190,000
7%
$19,680,000
Blend value · Realmo final
$17.72M
Range $15.95M – $19.49M · ±10%
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
$221 / 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
$255,720
Tax year 2024
Assessed value
$19,620,127
Assessed 2024
Previous assessed
$19,620,127
+0.0% YoY
Effective rate
1.30%
On assessed value
Assessed land
$5,822,921
Assessed improvement
$13,797,206
Applied tax rate
10.0000
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
Office buildings
Use group
OFFICE BUILDING (MULTI-STORY)
Status
Off-Market
Year built
1990
Construction
WOOD
Heating
NONE
Stories
3
Total area
80,026 SF
Lot
6.89 ac (300,279 SF)
Zoning code
LCR110000*
APN
8293-050-041
UPID
US09-6475064
Jurisdiction
LOS ANGELES
Metro division
LOS ANGELES-LONG BEACH-GLENDALE, CA METROPOLITAN DIVISION
Zoning & alternative use
LCR110000* · Diamond Bar, CA
Zoning LCR110000* · permitted uses
LCR110000* · 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.
Building & site characteristics
From public records
Year built
1990
Construction
WOOD
Heating
NONE
Stories
3
Lot
6.89 ac
Current owner
From public records · entity-resolved
Muller-ing LLC
Entity
Free & Clear · 20 yrs held
Mailing address
18881 VON KARMAN AVE STE #400, IRVINE, CA 92612-6525
Mailing matches property
Different — outreach signal
Owner-occupied
No
Ownership since
2005
Owner contacts — direct phone, email, and related entities
Decision-maker phone · Verified email · Related entities & filings
Owner contacts
Email · phone · related entities
Sales History
6 recorded events · public records
Date
Price
Buyer
Seller
Deed Type
Mortgage
Oct 7, 2005
—
Muller-ing LLC
Muller-gateway LLC
Quit Claim Deed
—
Oct 7, 2005
$6,579,500
Muller-rock 2 Gateway LLC
Muller-gateway LLC
Grant Deed
—
May 9, 2003
—
Muller-gateway LLC
Irp Muller Associates LLC
Quit Claim Deed
related
$14,700,000 · Gmac Commercial Mortgage Bank
Feb 26, 1999
$21,500,000
Irp Muller Associates LLC
—
Grant Deed
related
—
Aug 30, 1996
—
Diamond Bar Business Assoc
—
Deed Of Trust
related
—
—
—
Paper-pak
—
Deed Of Trust
related
$20,500,000 · Nationsbank Of Texas
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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