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Property profile & analytics
OFF-MARKET
Estimated value
$1,350,000
Office buildings
900 Ct St Martinez, CA 94553-1731
Entity Owned
6-yr Hold
Absentee Owner
~
Est. High Equity
Property ID
US09-3125742
Property profile
Verified
Property type
Office buildings
Use group
OFFICE BUILDING
Year built
1930
Total area
5,364 SF
Lot
0.14 ac (6,222 SF)
APN
373-152-001-5
UPID
US09-3125742
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
$1.36M
CAP Approach
CAP
$1.59M
Comparable Approach
Comparable
$928k
Blend (final)
Blend
$1.35M
Owner & transaction history
Mm & B LLC · 6 yrs held
Mm & B LLC
since 2020
Last sale
$1.2M
7 recorded transactions
Zoning & alternative use
Permitted uses
Permitted uses
Allowed · conditional · prohibited
Top alternative use upside
Medical building
$2.0M
+5.7%
Commercial (general)
$1.9M
+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
$1,420,000
ML approach
$1,355,000
CAP Approach
CAP Return
Estimation
6%
$1,725,000
6.5%
$1,590,000
7%
$1,480,000
Alternative Use
Use
Estimation
OFFICE BUILDING
$1,845,000
Current use
MEDICAL BUILDING
$1,950,000
Change: +6% · Conversion: Easy
COMMERCIAL (GENERAL)
$1,865,000
Change: +1% · Conversion: Easy
Blend value · Realmo final
$1.35M
Range $1.22M – $1.49M · ±10% · vs last sale $1.19M (Mar 20 2020)
Last sale anchor
$1.19M
Mar 20 2020
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
$252 / 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
$15,800
Tax year 2024
Assessed value
$1,277,848
Assessed 2024
Previous assessed
$1,277,848
+0.0% YoY
Effective rate
1.24%
On assessed value
Assessed land
$428,879
Assessed improvement
$848,969
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
1930
Heating
NONE
Stories
1
Units
1
Rooms
1
Total area
5,364 SF
Lot
0.14 ac (6,222 SF)
APN
373-152-001-5
UPID
US09-3125742
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
$1.8M
MEDICAL BUILDING
Est. value
$2.0M
COMMERCIAL (GENERAL)
Est. value
$1.9M
OFFICE BUILDING Current
MEDICAL BUILDING
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
1930
Heating
NONE
Stories
1
Units
1
Rooms
1
Lot
0.14 ac
Current owner
From public records · entity-resolved
Mm & B LLC
Entity
Mailing address
3580 PIERCE ST, SAN FRANCISCO, CA 94123-1556
Mailing matches property
Different — outreach signal
Owner-occupied
No
Ownership since
2020
Owner contacts — direct phone, email, and related entities
Decision-maker phone · Verified email · Related entities & filings
Owner contacts
Email · phone · related entities
Sales History
7 recorded events · public records
Date
Price
Buyer
Seller
Deed Type
Mortgage
Mar 19, 2021
—
Mm&b LLC
—
Deed
related
$570,000 · City National Bank
Mar 20, 2020
$1,192,000
Mm & B LLC
Timothy E Griffin
Grant Deed
$1,150,000 · Timothy E Griffin
Apr 11, 2014
—
Corazza Family Trust
Corazza,corliss G
Quit Claim Deed
related
—
May 23, 2012
—
Griffin G M Living Trust
Griffin,geoffrey M
Quit Claim Deed
related
—
Apr 2, 2004
—
Geoffrey M Griffin
Griffin,tr
Quit Claim Deed
related
—
Jun 25, 1981
$49,000
John E Griffin
Cristiansen,donna M
Grant Deed
—
Aug 15, 1977
—
Owner Name Unavailable
—
Grant Deed
related
—
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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