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Property profile & analytics
OFF-MARKET
Estimated value
$520,000
Mobile home & RV parks
21217 Washington Ave, Diamond Bar, CA 91789-3303
Individually Owned
2-yr Hold
Absentee Owner
Free & Clear
Property ID
US09-9542502
Property profile
Verified
Property type
Mobile home & RV parks
Use group
MOBILE HOME PARK, TRAILER PARK
Year built
1980
Total area
3,996 SF
Lot
0.01 ac (520 SF)
Zoning code
LCM1
APN
8719-010-017
UPID
US09-9542502
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
$445k
CAP Approach
CAP
by Request
Comparable Approach
Comparable
$591k
Blend (final)
Blend
$520k
Owner & transaction history
Janet L Cauffman · 2 yrs held
Janet L Cauffman
since 2024
7 recorded transactions
Zoning & alternative use
LCM1 · 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
$445,000
CAP Approach
CAP Return
Estimation
6%
by Request
6.5%
by Request
7%
by Request
Blend value · Realmo final
$520k
Range $468k – $572k · ±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
$130 / 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
$85,338
Tax year 2024
Assessed value
$4,162,869
Assessed 2024
Previous assessed
$4,162,869
+0.0% YoY
Effective rate
2.05%
On assessed value
Assessed land
$2,035,383
Assessed improvement
$2,127,486
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
Mobile home & RV parks
Use group
MOBILE HOME PARK, TRAILER PARK
Status
Off-Market
Year built
1980
Heating
NONE
Units
1
Bathrooms
2
Total area
3,996 SF
Lot
0.01 ac (520 SF)
Zoning code
LCM1
APN
8719-010-017
UPID
US09-9542502
Jurisdiction
LOS ANGELES
Metro division
LOS ANGELES-LONG BEACH-GLENDALE, CA METROPOLITAN DIVISION
Zoning & alternative use
LCM1 · Diamond Bar, CA
Zoning LCM1 · permitted uses
LCM1 · 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
1980
Heating
NONE
Units
1
Bathrooms
2
Lot
0.01 ac
Current owner
From public records · entity-resolved
Janet L Cauffman
Individual
Free & Clear · 2 yrs held
Mailing matches property
Different — outreach signal
Owner-occupied
No
Ownership since
2024
Owner contacts — direct phone, email, and related entities
Decision-maker phone · Verified email · Related entities & filings
Owner contacts
Email · phone · related entities
Sales History
11 recorded events · public records
Date
Price
Buyer
Seller
Deed Type
Mortgage
Feb 8, 2024
—
Janet L Cauffman
Suzette Rivera
Quit Claim Deed
related
—
Sep 15, 2023
—
Diamond Bar Estates LP
—
Deed
related
$10,200,000 · Hcn Bank
Aug 16, 2017
—
Diamond Bar Estates
—
Deed
related
$8,000,000 · Thrivent Fin'l/lutherans
Dec 15, 2016
—
John S Cauffman
Cauffman,dorothy V
Affidavit Of Death
related
—
Dec 12, 2012
—
Difilippo Carol 1998 Trust
Difilippo,carol L
Quit Claim Deed
related
—
Feb 14, 2012
—
Cauffman Family Trust
Cauffman,john R
Quit Claim Deed
related
—
Sep 13, 2011
—
Cauffman Family Trust
Cauffman John R Trust
Quit Claim Deed
related
—
Jan 10, 2011
—
Cauffman Family Trust
Cauffman John R Trust
Quit Claim Deed
related
—
Jun 21, 2010
—
Cauffman Dorothy V Trust
Dorothy V Cauffman Family LP
Quit Claim Deed
related
—
Oct 6, 2008
—
Cauffman Fern P Trust
Cauffman Fern P Trust
Quit Claim Deed
related
—
—
—
Diamond Bar Estates
—
Deed Of Trust
related
$8,000,000 · Thrivent Fin'l/lutherans
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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