Individually Owned 
For Sale
$2,550,000
840-842A Dorchester Ave, Boston, MA 02125
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Property profile
Verified
Property type
Investment properties
Use group
OFFICE/RESIDENTIAL (MIXED USE)
Year built
1920
Construction
BRICK
Total area
7,344 SF
Lot
0.08 ac (3,622 SF)
Zoning code
RC
APN
DORC W:07 P:02766 S:000
UPID
US38-0751938
Cap rate & NOI
Priority signal for investors
Implied cap rate, NOI & suggested price
Cap rate vs submarket · NOI estimate · 3 price anchors
Location
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
by Request
CAP Approach
CAP
$2.76M
Comparable Approach
Comparable
by Request
Blend (final)
Blend
$2.37M
Owner & transaction history
since 2018
7 recorded transactions
Zoning & alternative use
RC · Dorchester, MA
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
Value estimation
Instant AI valuation built from comps, income signals, and proprietary benchmarks. A defensible range, not a single guess.
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Unlock the complete Valuation workflow
Full NOI reconstruction, selected comps, alternative-use scenarios, data audit and PDF export.
All 9 comparables with addresses
Sensitivity value band
Source audit · 6 inputs
PDF export
Analytics Standard · 5 reports
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Summary
1
Valuation conclusion
Included free
Estimated market value
$2.37M
Value range
$2.13M – $2.60M
±10% around blend
Estimated value / SF
$322 / SF
Confidence
High
9 county-verified comps
Property data
88
Market benchmarks
100
Comparable evidence
90
$2.13M
blend $2.37M
$2.60M
Market-derived valuation under stabilized market assumptions. Desktop analysis. No physical inspection performed.
2
Subject property
Included free
GBA
7,344 SF
Lot area
0.08 ac
Year built
1920
Stories
3
APN
DORC W:07 P:02766 S:000
Zoning
RC
Assessed value
$905,700
3
Income approach: direct capitalization
Partial preview
Income approach indication
$2.76M
Direct capitalization · @ 6.5% CAP return
@ 6% CAP return
$2.99M
@ 6.5% CAP return
$2.76M
@ 7% CAP return
$2.56M
4
Sales comparison
Partial preview
Sales approach indication
$2.92M
Weighted, 9 comps · high confidence
Evidence
9 found · 6 selected
County-verified recorded sales
Comparable
Sale dateSale price$ / SF
1.5 mi away · 9,108 SF
4.6 mi away · 8,160 SF
4.6 mi away · 8,160 SF
5.1 mi away · 7,018 SF
5.4 mi away · 7,160 SF
5
Sensitivity & risk
Partial preview
Downside
−10%
Base
$2.37M
Upside
+10%
Bounds of the ±10% band vs the blend — never simulated scenarios.
6
Current market position
Included free
Benchmark
Observed band ($/SF)AverageSubject delta
ZIP 27 sales
$984
-67%
Submarket 529 sales
$482
-33%
County 599 sales
$441
-27%
Band = middle half (Q1–Q3) of recorded sale $/SF for this use type per geography; the diamond marks the subject at $322/SF. Delta below average reads as headroom. Source: Realmo CRE sales derivatives (county records).
7
Data & methodology
Included free
Building area
County record
Property tax
Not available
Assessed value
County record
Zoning designation
County record
Operating expenses
Modeled
Market rent
Not available
Not analyzed due to unavailable source data: actual rent roll, tenant leases, physical condition and capital
requirements are outside a desktop analysis.
Cost Approach excluded: income and sales evidence cover the value conclusion.
Automated valuation analysis, not a licensed appraisal. Figures are derived from public
records and proprietary models. Desktop analysis: no physical inspection, tenant leases or reported
property income. Verify with a licensed appraiser before transacting.
Cap rate
Cap rate calculated from real income and expense signals, benchmarked against sales of similar assets nearby.
17% off on annual
Unlock the complete Cap Rate workflow
Full market tables, editable assumptions, comparable evidence, saved work and exports.
9-scenario matrix
Comparable evidence · 9 sales
Market rates by use type
PDF export
Analytics Standard · 5 reports
from $99/month
from $99/month
Overview
No cap rate is computable for this property yet: no recorded sale, income signal or market-rate row for its use type.
Price sensitivity
The rate is the decision lever; valuation is the consequence.
Test a cap rate
Implied value$906k
Move the market yield to see immediate price impact.
Value / SF
$123
Vs. selected
Base
Derivation
NOI ÷ cap
Arithmetic over the derived NOI * — not market scenario modeling.
NOI × cap matrix
Preview
Preview of 9 modeled outcomes.
NOI
5.00%7.00%9.00%
$57k
$1.14M
$815k
$634k
$63k
$1.27M
$906k
$704k
$70k
$1.39M
$996k
$775k
NOI sensitivity ±10% across the 5 / 7 / 9% anchors — derivation of the NOI above.
Comparable evidence
Partial preview
Recorded sales nearby
9 found
High confidence · county-verified
Closest comparable
$3.85M
1.1 mi · Dec 2025 · $643/SF
Property tax & assessments
Tax year 2024Property tax & assessments
Tax year 2024
Assessed value
$905,700
Assessed 2024
Previous assessed
$909,100
-0.4% YoY
Assessed land
$218,800
Assessed improvement
$686,900
Automated cap rate analysis. Based on public records, market benchmarks and proprietary
models. Verify with a licensed professional before transacting.
Property description
Physical attributes from public recordsBuilding & lot
Public records
Property type
Investment properties
Use group
OFFICE/RESIDENTIAL (MIXED USE)
Status
For Sale
Year built
1920
Construction
BRICK
Heating
NONE
Buildings
1
Stories
3
Units
5
Total area
7,344 SF
Lot
0.08 ac (3,622 SF)
Zoning code
RC
APN
DORC W:07 P:02766 S:000
UPID
US38-0751938
Jurisdiction
BOSTON
Metro division
BOSTON-QUINCY, MA METROPOLITAN DIVISION
Zoning & alternative use
RC · Dorchester, MAZoning RC · permitted uses
RC · Dorchester, MA
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Building & site characteristics
From public records
Year built
1920
Construction
BRICK
Heating
NONE
Stories
3
Buildings
1
Units
5
Lot
0.08 ac
Zoning
The recorded zoning designation, what the district officially allows, and the municipal source it comes from.
Zoning designation
County-recorded code
RC
Jurisdiction
Dorchester, MA
Recorded code
RC
Ownership Intelligence
Find the owner behind the property.
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What opens after registration
Ownership report
Owner identityResolved entity and name variants
Portfolio holdingsLinked properties and estimated value
Deal signalsSell-side activity worth following
Debt & historyRecorded loans and transaction history
Private report access
See the ownership record for this address.
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Owner of record and activity signals are derived from public records and modeled classifications.
They do not confirm beneficial ownership or intent to transact.
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“Is 15.6% cap rate sustainable?” · “Best tenant mix for BU1?” · “What’s the redev upside?”
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