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Property profile & analytics
OFF-MARKET
Estimated value
$875,000
Medical Office Space
19830 Lk Chabot Rd Castro Valley, CA 94546-4063
Entity Owned
1-yr Hold
Free & Clear
Property ID
US09-9200463
Property summary
AI-generated overview
Exceptional opportunity to acquire a 5,290 square foot medical office building in Castro Valley, CA. Located directly across from Sutter Health Medical Center, this three-story, Class B building features four medical suites, two currently leased at 41% occupancy. Built in 1969, the property includes a fully built-out basement (approximately 950 sq ft), an elevator, 16 parking spaces, and low-maintenance landscaping. Situated on a 15,894 sq ft lot in the Castro Valley Business District (CVBD), this multi-tenant property offers significant potential for owner-users seeking an SBA-loan-compatible space or investors targeting steady rental income. The asking price is $1,799,000 ($340.08/sq ft, $449,750/unit), and a 1031 exchange is permitted. The property's APN is 84A-150-10-2. This is a gross lease property with no tenant credit rating.
Property profile
Verified
Property type
Medical Office Space
Use group
MEDICAL BUILDING
Year built
1969
Construction
WOOD
Total area
4,340 SF
Lot
0.37 ac (15,984 SF)
APN
84A-150-10-2
UPID
US09-9200463
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
$1.15M
Comparable Approach
Comparable
$640k
Blend (final)
Blend
$875k
Owner & transaction history
Star Ridge LLC · 1 yrs held
Star Ridge LLC
since 2025
7 recorded transactions
Zoning & alternative use
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 Castro Valley submarket · NOI estimate · Typical band, median & reading
Implied cap rate, NOI & submarket benchmark
Cap vs Castro Valley 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%
$1,240,000
6.5%
$1,145,000
7%
$1,060,000
Alternative Use
Use
Estimation
OFFICE BUILDING
$1,405,000
Change: -18% · Conversion: Easy
AUTO REPAIR, GARAGE
$1,400,000
Change: -19% · Conversion: Difficult
Blend value · Realmo final
$875k
Range $788k – $963k · ±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
$202 / 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 2023Property tax & assessments
Tax year 2023
Tax billed
$17,694
Tax year 2023
Assessed value
$1,009,529
Assessed 2024
Previous assessed
$989,737
+2.0% YoY
Effective rate
1.75%
On assessed value
Assessed land
$481,711
Assessed improvement
$527,818
Applied tax rate
54.0000
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
Medical Office Space
Use group
MEDICAL BUILDING
Status
Off-Market
Year built
1969
Construction
WOOD
Heating
NONE
Buildings
1
Stories
2
Units
4
Total area
4,340 SF
Lot
0.37 ac (15,984 SF)
APN
84A-150-10-2
UPID
US09-9200463
Jurisdiction
ALAMEDA
Metro division
OAKLAND-FREMONT-HAYWARD, CA METROPOLITAN DIVISION
Zoning & alternative use
Zoning · permitted uses
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Permitted & conditional uses
Allowed · special-permit conditions · prohibited
Alternative use value scenarios
Repositioning upside vs current use
OFFICE BUILDING
Est. value
$1.4M
AUTO REPAIR, GARAGE
Est. value
$1.4M
OFFICE BUILDING
AUTO REPAIR, GARAGE
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
1969
Construction
WOOD
Heating
NONE
Stories
2
Buildings
1
Units
4
Lot
0.37 ac
Current owner
From public records · entity-resolved
Star Ridge LLC
Entity
Free & Clear · 1 yrs held
Mailing address
883 BEGONIA DR, SAN LEANDRO, CA 94578-3806
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
9 recorded events · public records
Date
Price
Buyer
Seller
Deed Type
Mortgage
Jun 5, 2025
$1,350,000
Star Ridge LLC
Raymond K Chan
Grant Deed
—
Oct 29, 1999
$670,000
Chan Trust
Croce Trust
Grant Deed
—
Mar 18, 1999
—
Croce Trust
Croce,louie J
Quit Claim Deed
related
—
Jun 2, 1997
$28,500
Croce Trust
Lopez,carlos N & Anna E
Grant Deed
—
Apr 22, 1997
—
Louis J Croce
Croce Trust
Quit Claim Deed
related
—
Dec 18, 1995
—
Croce Trust
Croce Trust
Quit Claim Deed
related
—
Aug 9, 1994
—
Croce Trust
Croce Trust
Quit Claim Deed
related
—
Jun 26, 1990
$635,000
Louie Croce
Coats,b. Trustee
Grant Deed
$335,000 · Union Bank
—
—
Croce Trust
—
Deed Of Trust
related
$300,000 · Charles E Bellig Money Purchas
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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