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Property profile & analytics
OFF-MARKET
Estimated value
$2,210,000
Medical Office Space
20406 Redwood Rd, Castro Valley, CA 94546-4317
Entity Owned
5-yr Hold
~
Est. High Equity
Property ID
US09-6819377
Property profile
Verified
Property type
Medical Office Space
Use group
MEDICAL BUILDING
Year built
1974
Construction
WOOD
Total area
6,236 SF
Lot
0.44 ac (19,000 SF)
APN
84C-770-6-1
UPID
US09-6819377
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
$2.28M
CAP Approach
CAP
$1.65M
Comparable Approach
Comparable
$2.14M
Blend (final)
Blend
$2.21M
Owner & transaction history
Saydon LLC · 5 yrs held
Saydon LLC
since 2021
Last sale
$2.2M
7 recorded transactions
Zoning & alternative use
Permitted uses
Permitted uses
Allowed · conditional · prohibited
Top alternative use upside
Restaurant
$3.1M
+84.4%
Neighborhood: shopping center
$2.7M
+59.3%
Auto repair, garage
$2.3M
+38.7%
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
$2,150,000
ML approach
$2,275,000
CAP Approach
CAP Return
Estimation
6%
$1,780,000
6.5%
$1,645,000
7%
$1,525,000
Alternative Use
Use
Estimation
MEDICAL BUILDING
$1,665,000
Current use
RESTAURANT
$3,065,000
Change: +84% · Conversion: Difficult
NEIGHBORHOOD: SHOPPING CENTER
$2,650,000
Change: +59% · Conversion: Difficult
AUTO REPAIR, GARAGE
$2,305,000
Change: +39% · Conversion: Difficult
OFFICE BUILDING
$2,020,000
Change: +22% · Conversion: Easy
RETAIL STORES
$1,805,000
Change: +9% · Conversion: Difficult
COMMERCIAL (GENERAL)
$1,715,000
Change: +3% · Conversion: Easy
INDUSTRIAL (GENERAL)
$1,695,000
Change: +2% · Conversion: Difficult
Blend value · Realmo final
$2.21M
Range $1.99M – $2.43M · ±10% · vs last sale $2.24M (Jan 12 2021)
Last sale anchor
$2.24M
Jan 12 2021
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
$354 / 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
$33,132
Tax year 2023
Assessed value
$2,377,088
Assessed 2024
Previous assessed
$2,330,496
+2.0% YoY
Effective rate
1.39%
On assessed value
Assessed land
$965,692
Assessed improvement
$1,411,396
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
1974
Construction
WOOD
Heating
NONE
Buildings
3
Stories
1
Units
3
Rooms
35
Bathrooms
5
Total area
6,236 SF
Lot
0.44 ac (19,000 SF)
APN
84C-770-6-1
UPID
US09-6819377
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
MEDICAL BUILDING Current
Est. value
$1.7M
RESTAURANT
Est. value
$3.1M
NEIGHBORHOOD: SHOPPING CENTER
Est. value
$2.7M
AUTO REPAIR, GARAGE
Est. value
$2.3M
OFFICE BUILDING
Est. value
$2.0M
RETAIL STORES
Est. value
$1.8M
COMMERCIAL (GENERAL)
Est. value
$1.7M
INDUSTRIAL (GENERAL)
Est. value
$1.7M
MEDICAL BUILDING Current
RESTAURANT
NEIGHBORHOOD: SHOPPING CENTER
AUTO REPAIR, GARAGE
OFFICE BUILDING
RETAIL STORES
COMMERCIAL (GENERAL)
INDUSTRIAL (GENERAL)
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
1974
Construction
WOOD
Heating
NONE
Stories
1
Buildings
3
Units
3
Rooms
35
Bathrooms
5
Lot
0.44 ac
Current owner
From public records · entity-resolved
Saydon LLC
Entity
Mailing address
20406 REDWOOD RD STE F, CASTRO VALLEY, CA 94546-4317
Mailing matches property
Yes
Owner-occupied
Yes
Ownership since
2021
Owner contacts — direct phone, email, and related entities
Decision-maker phone · Verified email · Related entities & filings
Owner contacts
Email · phone · related entities
Sales History
15 recorded events · public records
Date
Price
Buyer
Seller
Deed Type
Mortgage
Jan 16, 2026
—
Saydon LLC
—
Deed
related
$639,732 · Bank Of America NA
Aug 20, 2025
—
Valley Horizon Commercial LLC
—
Deed
related
$1,100,000 · Beacon Business Bank N A
Jun 24, 2024
—
Valley Horizon Commercial LLC
—
Deed
related
$1,380,000 · Bay Commercial Bank
May 17, 2024
—
Valley Horizon Commercial LLC
—
Deed
related
$3,626,000 · Banc Of California NA
Jan 12, 2021
$2,240,000
Saydon LLC
Edenvale Medical LLC
Grant Deed
$1,400,000 · Us Bank NA
Jan 12, 2021
$2,046,000
Valley Horizon Commercial LLC
Edenvale Medical LLC
Grant Deed
$1,781,000 · Bay Commercial Bank
Mar 22, 2017
$3,180,000
Edenvale Medical LLC
David M Silva
Grant Deed
$2,066,793 · First Republic Bank
Mar 22, 2017
—
Kim Dailey
Dailey,joseph
Quit Claim Deed
related
—
Jan 29, 2015
—
Ainsworth & Yagle Living Trust
Ainsworth,wayne
Quit Claim Deed
related
—
May 2, 2014
—
David M Silva
David M Silva
Intrafamily Transfer
related
$1,535,000 · Fremont Bank
Apr 25, 2014
$124,191
Donald J Silva
Woodward,john & Betty
Quit Claim Deed
related
—
May 23, 2006
$2,400,000
David M Silva
Klein D R & P R 1994 Trust
Grant Deed
$1,680,000 · Fremont Bank
Mar 10, 2006
—
Klein Dennis R Trust
Klein D R & M J 1996 Trust
Quit Claim Deed
related
—
Feb 18, 1999
$1,650,000
Klein Trust
Torok Trust
Grant Deed
$995,000 · Fremont Bank
Jan 6, 1989
$1,590,000
Donald Torok
Edenvale Medical
Grant Deed
$1,190,000 · Edenvale Medical
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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