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Property profile & analytics
OFF-MARKET
Estimated value
$815,000
Office buildings
900 Thompson St Martinez, CA 94553-1749
Entity Owned
Absentee Owner
~
Est. High Equity
Property ID
US09-0490045
Property profile
Verified
Property type
Office buildings
Use group
OFFICE BUILDING
Year built
1967
Total area
3,872 SF
Lot
0.27 ac (11,800 SF)
APN
373-154-010-4
UPID
US09-0490045
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
by Request
Blend (final)
Blend
$815k
Owner & transaction history
County Of Contra Costa
County Of Contra Costa
since 2026
7 recorded transactions
Zoning & alternative use
Permitted uses
Permitted uses
Allowed · conditional · prohibited
Top alternative use upside
Commercial (general)
$1.4M
+1.3%
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 Martinez submarket · NOI estimate · Typical band, median & reading
Implied cap rate, NOI & submarket benchmark
Cap vs Martinez 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
OFFICE BUILDING
$1,330,000
Current use
COMMERCIAL (GENERAL)
$1,350,000
Change: +1% · Conversion: Easy
Blend value · Realmo final
$815k
Range $734k – $897k · ±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
$210 / 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
$9,074
Tax year 2024
Assessed value
$628,471
Assessed 2024
Previous assessed
$628,471
+0.0% YoY
Effective rate
1.44%
On assessed value
Assessed land
$197,764
Assessed improvement
$430,707
Applied tax rate
5.0000
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
Status
Off-Market
Year built
1967
Heating
NONE
Stories
1
Total area
3,872 SF
Lot
0.27 ac (11,800 SF)
APN
373-154-010-4
UPID
US09-0490045
Jurisdiction
CONTRA COSTA
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 Current
Est. value
$1.3M
COMMERCIAL (GENERAL)
Est. value
$1.4M
OFFICE BUILDING Current
COMMERCIAL (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
1967
Heating
NONE
Stories
1
Lot
0.27 ac
Current owner
From public records · entity-resolved
County Of Contra Costa
Entity
Mailing address
5250 ALHAMBRA VLY RD, MARTINEZ, CA 94553-9739
Mailing matches property
Different — outreach signal
Owner-occupied
No
Ownership since
2026
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
Apr 6, 2026
$1,000,000
County Of Contra Costa
Gerald Jeffry Family Limited Partnership
Grant Deed
—
Jan 30, 2019
—
Ross,e & M Family Trust
Ross,marjorie
Affidavit Of Death
related
—
Aug 15, 2008
—
Ross E & M Family Trust
Ross,eugene H & Marjorie A
Quit Claim Deed
related
—
Mar 24, 1999
—
Gerald Jeffry Family LP
Jeffry Trust
Quit Claim Deed
related
—
Mar 24, 1999
$55,000
Ross,eugene H & Marjorie A
Gerald Jeffry Family LP
Trustees Deed
related
—
Jan 19, 1996
—
Ross Trust
Rosos,eugene H & Marjorie A
Grant Deed
related
—
—
—
Eugene H Ross
—
Deed Of Trust
related
—
—
—
Gerald Jeffry Flp
—
Deed Of Trust
related
$250,000 · Jeffry Trust
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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