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Property profile & analytics
OFF-MARKET
Estimated value
$20,760,000
Office buildings
300 Granite St Braintree, MA 02184-3909
Entity Owned
4-yr Hold
~
Est. High Equity
Property ID
US38-1685936
Property profile
Verified
Property type
Office buildings
Use group
OFFICE BUILDING
Year built
1986
Construction
STEEL FRAME
Total area
90,500 SF
Lot
4.39 ac (191,228 SF)
Zoning code
HBD
APN
BRAI M:2040 B:0 L:13
UPID
US38-1685936
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
Current use
Occupant on record · Public records
-
Liberty Bay Credit Union Credit Union
-
Brendan O'boyle Physician
-
Lawrence Joseph Dental Office
-
Generations Advisory Group Financial Advisor
-
Access Strategy Partners Inc. Business Management Consultant
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
$13.07M
CAP Approach
CAP
by Request
Comparable Approach
Comparable
$16.82M
Blend (final)
Blend
$20.76M
Owner & transaction history
Rock Breakers LLC · 4 yrs held
Rock Breakers LLC
since 2021
Last sale
$19.2M
6 recorded transactions
Zoning & alternative use
HBD · Braintree, MA
Permitted uses
Permitted uses
Allowed · conditional · prohibited
Top alternative use upside
Auto repair, garage
$29.1M
+9.8%
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 Braintree submarket · NOI estimate · Typical band, median & reading
Implied cap rate, NOI & submarket benchmark
Cap vs Braintree 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
$25,820,000
ML approach
$13,065,000
CAP Approach
CAP Return
Estimation
6%
by Request
6.5%
by Request
7%
by Request
Alternative Use
Use
Estimation
OFFICE BUILDING
$26,550,000
Current use
AUTO REPAIR, GARAGE
$29,145,000
Change: +10% · Conversion: Difficult
RETAIL STORES
$26,495,000
Change: 0% · Conversion: Moderate
APARTMENT HOUSE (5+ UNITS)
$26,000,000
Change: -2% · Conversion: Easy
COMMERCIAL (GENERAL)
$23,160,000
Change: -13% · Conversion: Easy
Blend value · Realmo final
$20.76M
Range $18.68M – $22.84M · ±10% · vs last sale $19.15M (Oct 20 2021)
Last sale anchor
$19.15M
Oct 20 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
$229 / 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
$367,932
Tax year 2024
Assessed value
$18,169,500
Assessed 2024
Previous assessed
$18,169,500
+0.0% YoY
Effective rate
2.02%
On assessed value
Assessed land
$4,971,900
Assessed improvement
$13,197,600
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
1986
Construction
STEEL FRAME
Heating
FORCED AIR
Cooling
YES
Buildings
1
Stories
4
Units
14
Bathrooms
8
Total area
90,500 SF
Lot
4.39 ac (191,228 SF)
Zoning code
HBD
APN
BRAI M:2040 B:0 L:13
UPID
US38-1685936
Jurisdiction
BRAINTREE
Metro division
BOSTON-QUINCY, MA METROPOLITAN DIVISION
Zoning & alternative use
HBD · Braintree, MA
Zoning HBD · permitted uses
HBD · Braintree, MA
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Permitted & conditional uses
Allowed · special-permit conditions · prohibited
Braintree. Always verify with local authorities before improvements.
Alternative use value scenarios
Repositioning upside vs current use
OFFICE BUILDING Current
Est. value
$26.6M
AUTO REPAIR, GARAGE
Est. value
$29.1M
RETAIL STORES
Est. value
$26.5M
APARTMENT HOUSE (5+ UNITS)
Est. value
$26.0M
COMMERCIAL (GENERAL)
Est. value
$23.2M
OFFICE BUILDING Current
AUTO REPAIR, GARAGE
RETAIL STORES
APARTMENT HOUSE (5+ UNITS)
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
1986
Construction
STEEL FRAME
Heating
FORCED AIR
Cooling
Yes
Stories
4
Buildings
1
Units
14
Bathrooms
8
Lot
4.39 ac
Current owner
From public records · entity-resolved
Rock Breakers LLC
Entity
Mailing address
3 PARK ST, LEOMINSTER, MA 01453-5641
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
6 recorded events · public records
Date
Price
Buyer
Seller
Deed Type
Mortgage
Oct 20, 2021
$19,150,000
Rock Breakers LLC
Granite 300 Equity Partnr
Quit Claim Arm's Length For Ne States
$2,939,000 · Brookline Bank
Oct 20, 2021
—
Rock Breakers LLC
—
Deed
related
$2,500,000 · Brookline Bank
Jan 19, 2018
$15,600,000
Granite 300 Equity Ptnrs
Sun Life Assurance Co
Quit Claim Deed
related
$12,925,000 · Brookline Bk
Jun 22, 2001
$13,900,000
Sun Life Assurance Co
Plaza Executive Cntr T
Grant Deed
—
Jun 25, 1997
—
Grossman,morton S Tr
—
Deed Of Trust
related
$7,200,000 · Principal Mutual Life Ins
Aug 30, 1990
—
Grossman,morton S Tr
—
Deed Of Trust
related
$450,000 · Braintree Svgs Bk
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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