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Property profile & analytics
OFF-MARKET
Estimated value
$19,405,000
Apartment buildings
1828 Thelborn St, West Covina, CA 91791-1454
Entity Owned
Absentee Owner
Free & Clear
Property ID
US09-6926757
Property profile
Verified
Property type
Apartment buildings
Use group
APARTMENT HOUSE (5+ UNITS)
Year built
1962
Construction
WOOD
Total area
66,948 SF
Lot
2.37 ac (103,286 SF)
Zoning code
WCR3-MF20*
APN
8454-016-016
UPID
US09-6926757
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
by Request
Comparable Approach
Comparable
$25.43M
Blend (final)
Blend
$19.41M
Owner & transaction history
Advanced Zx LLC
Advanced Zx LLC
since 2025
Last sale
$19.9M
7 recorded transactions
Zoning & alternative use
WCR3-MF20* · West Covina, CA
Permitted uses
Permitted uses
Allowed · conditional · prohibited
Top alternative use upside
Auto repair, garage
$31.0M
+51.2%
Medical building
$30.4M
+48.6%
Warehouse, storage
$25.7M
+25.6%
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 West Covina submarket · NOI estimate · Typical band, median & reading
Implied cap rate, NOI & submarket benchmark
Cap vs West Covina 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%
by Request
6.5%
by Request
7%
by Request
Alternative Use
Use
Estimation
APARTMENT HOUSE (5+ UNITS)
$20,485,000
Current use
AUTO REPAIR, GARAGE
$30,965,000
Change: +51% · Conversion: Difficult
MEDICAL BUILDING
$30,435,000
Change: +49% · Conversion: Moderate
WAREHOUSE, STORAGE
$25,720,000
Change: +26% · Conversion: Difficult
OFFICE BUILDING
$23,360,000
Change: +14% · Conversion: Moderate
RETAIL STORES
$23,140,000
Change: +13% · Conversion: Difficult
Blend value · Realmo final
$19.41M
Range $17.46M – $21.35M · ±10% · vs last sale $19.86M (Jul 27 2025)
Last sale anchor
$19.86M
Jul 27 2025
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
$290 / 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
$306,242
Tax year 2024
Assessed value
$24,480,000
Assessed 2024
Previous assessed
$24,480,000
+0.0% YoY
Effective rate
1.25%
On assessed value
Assessed land
$17,340,000
Assessed improvement
$7,140,000
Applied tax rate
12.0000
Comparables
6 recent transactions · within 1.5 miComparable in this city
6 recent transactions
Comparable in this City
Similar Nearby for Sale
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
Apartment buildings
Use group
APARTMENT HOUSE (5+ UNITS)
Status
Off-Market
Year built
1962
Construction
WOOD
Heating
NONE
Buildings
2
Units
70
Bathrooms
112
Total area
66,948 SF
Lot
2.37 ac (103,286 SF)
Zoning code
WCR3-MF20*
APN
8454-016-016
UPID
US09-6926757
Jurisdiction
LOS ANGELES
Metro division
LOS ANGELES-LONG BEACH-GLENDALE, CA METROPOLITAN DIVISION
Zoning & alternative use
WCR3-MF20* · West Covina, CA
Zoning WCR3-MF20* · permitted uses
WCR3-MF20* · West Covina, CA
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Permitted & conditional uses
Allowed · special-permit conditions · prohibited
West Covina. Always verify with local authorities before improvements.
Alternative use value scenarios
Repositioning upside vs current use
APARTMENT HOUSE (5+ UNITS) Current
Est. value
$20.5M
AUTO REPAIR, GARAGE
Est. value
$31.0M
MEDICAL BUILDING
Est. value
$30.4M
WAREHOUSE, STORAGE
Est. value
$25.7M
OFFICE BUILDING
Est. value
$23.4M
RETAIL STORES
Est. value
$23.1M
APARTMENT HOUSE (5+ UNITS) Current
AUTO REPAIR, GARAGE
MEDICAL BUILDING
WAREHOUSE, STORAGE
OFFICE BUILDING
RETAIL STORES
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
1962
Construction
WOOD
Heating
NONE
Buildings
2
Units
70
Bathrooms
112
Lot
2.37 ac
Current owner
From public records · entity-resolved
Advanced Zx LLC
Entity
Free & Clear · 0 yrs held
Mailing address
5788 W ADAMS BLVD #3, LOS ANGELES, CA 90016-2459
Mailing matches property
Different — outreach signal
Owner-occupied
No
Ownership since
2025
Owner contacts — direct phone, email, and related entities
Decision-maker phone · Verified email · Related entities & filings
Owner contacts
Email · phone · related entities
Sales History
8 recorded events · public records
Date
Price
Buyer
Seller
Deed Type
Mortgage
Oct 27, 2025
$19,858,000
Advanced Zx LLC
Lpc 1829 E Workman Ave LLC
Grant Deed
—
Aug 11, 2022
$48,600,000
Lpc 1829 E Workman Ave LLC
Amfpiv Atrium LLC
Grant Deed
$21,142,000 · M&t Realty Capital Corporation
Nov 1, 2018
—
Amfp IV Atrium LLC
—
Deed
related
$22,298,000 · Holliday Fenoglio Fowler
Oct 2, 2018
$33,850,000
Amfp IV Atrium LLC
Mg Evergreen Atrium LP
Grant Deed
—
Dec 1, 2011
—
Viewridge Atrium LLC
Viewridge Avenue LP
Quit Claim Deed
$13,860,000 · Cwcapital LLC
Dec 8, 2008
—
Mg Evergreen Apartments LP
Ppc Avf III Pacific LLC
Grant Deed
$13,500,000 · Sierra Capital Partners INC
Nov 30, 2004
$18,350,000
Ppc Avf III Pacific LLC
Colton General
Grant Deed
$13,750,000 · Washington Mutual Fsb
—
—
Amfp IV Atrium LLC
—
Deed Of Trust
related
$22,298,000 · Holliday Fenoglio Fowler
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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