Individually Owned 
For Sale
1 / 26
$439,000
239 Dorchester St,Unit 1, Boston, MA 02127
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Property summary
AI-generated overview
This property is a commercial office space located at 239 Dorchester St #1 in South Boston, with a total area of 1,225 square feet. The unit includes a full bathroom and a kitchenette, and it is configured with an interior finished basement that adds usable space. It is situated within an active commercial corridor, providing direct street access and visibility typical of office properties in the area.
Property profile
Verified
Property type
Other office properties
Use group
CONDOMINIUM OFFICES
Total area
1,225 SF
Lot
0.03 ac (1,225 SF)
Zoning code
CC
APN
SBOS W:07 P:00779 S:002
UPID
US38-1122748
Cap rate & NOI
Priority signal for investors
Implied cap rate, NOI & suggested price
Cap rate vs submarket · NOI estimate · 3 price anchors
Current use
Occupant on record · Public records
-
Building Supply Industrial Manufacturer
Location
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
$205k
CAP Approach
CAP
by Request
Comparable Approach
Comparable
by Request
Blend (final)
Blend
$205k
Owner & transaction history
since 1995
4 recorded transactions
Zoning & alternative use
CC · South Boston, 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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Full NOI reconstruction, selected comps, alternative-use scenarios, data audit and PDF export.
Full NOI build-up · 6 steps
All 5 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
$205k
Value range
$185k – $226k
±10% around blend
Estimated value / SF
$167 / SF
Confidence
High
5 county-verified comps
Property data
75
Market benchmarks
67
Comparable evidence
50
Income certainty
100
$185k
blend $205k
$226k
Market-derived valuation under stabilized market assumptions. Desktop analysis. No physical inspection performed.
2
Subject property
Included free
GBA
1,225 SF
Lot area
0.03 ac
APN
SBOS W:07 P:00779 S:002
Zoning
CC
Assessed value
$134,000
Annual tax
$3,386
3
Income approach: direct capitalization
Partial preview
Estimated Stabilized NOI, derived from market rent, vacancy and expense benchmarks. Actual property income not reported.
Estimated market rent / SF
Potential gross income
Vacancy allowance
Effective gross income
Benchmark operating expenses
Stabilized NOI
Property tax
$3,386
Selected cap rate
4
Sales comparison
Partial preview
Sales approach indication
$607k
Weighted, 5 comps · high confidence
Evidence
5 found · 5 selected
County-verified recorded sales
Comparable
Sale dateSale price$ / SF
2.1 mi away · 1,280 SF
6.7 mi away · 1,337 SF
8.2 mi away · 1,346 SF
9.8 mi away · 900 SF
5
Sensitivity & risk
Partial preview
Downside
−10%
Base
$205k
Upside
+10%
Bounds of the ±10% band vs the blend — never simulated scenarios.
6
Current market position
Included free
Benchmark
Observed band ($/SF)AverageSubject delta
Submarket 170 sales
$615
-73%
County 181 sales
$543
-69%
Band = middle half (Q1–Q3) of recorded sale $/SF for this use type per geography; the diamond marks the subject at $167/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
County record
Assessed value
County record
Zoning designation
County record
Operating expenses
Modeled
Market rent
Market benchmark
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 · 5 sales
NOI build-up · 9 steps
Market rates by use type
PDF export
Analytics Standard · 5 reports
from $99/month
from $99/month
Overview
Selected market yield
8.23%
Selected cap rate for this other office properties
Derived from the Boston market rent, vacancy and expense benchmarks for this use type.
Lower yield / higher price
Higher yield / lower price
5.0%
This property · 8.23%
9.0%
NOI (est.)
$36k *
* derived from a real price signal at a 7% cap
Price sensitivity
The rate is the decision lever; valuation is the consequence.
Test a cap rate
Implied value$439k
Move the market yield to see immediate price impact.
Value / SF
$358
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
7.73%8.23%8.73%
$33k
$421k
$395k
$372k
$36k
$467k
$439k
$414k
$40k
$514k
$483k
$455k
NOI sensitivity ±10% across the selected-rate band (±0.5 pp) — derivation of the NOI above.
Comparable evidence
Partial preview
Recorded sales nearby
5 found
High confidence · county-verified
Closest comparable
$700k
1.8 mi · Oct 2025 · $535/SF
Property tax & assessments
Tax year 2024Property tax & assessments
Tax year 2024
Tax billed
$3,386
Tax year 2024
Assessed value
$134,000
Assessed 2024
Previous assessed
$143,100
-6.4% YoY
Effective rate
2.53%
On assessed value
Assessed improvement
$134,000
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
Other office properties
Use group
CONDOMINIUM OFFICES
Status
For Sale
Heating
NONE
Buildings
1
Total area
1,225 SF
Lot
0.03 ac (1,225 SF)
Zoning code
CC
APN
SBOS W:07 P:00779 S:002
UPID
US38-1122748
Jurisdiction
BOSTON
Metro division
BOSTON-QUINCY, MA METROPOLITAN DIVISION
Zoning & alternative use
CC · South Boston, MAZoning CC · permitted uses
CC · South Boston, MA
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Building & site characteristics
From public records
Heating
NONE
Buildings
1
Lot
0.03 ac
Zoning
The recorded zoning designation, what the district officially allows, and the municipal source it comes from.
Zoning designation
County-recorded code
CC
Jurisdiction
South Boston, MA
Recorded code
CC
Ownership Intelligence
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Owner identityResolved entity and name variants
Portfolio holdingsLinked properties and estimated value
Deal signalsSell-side activity worth following
Debt & historyRecorded loans and transaction history
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Owner of record and activity signals are derived from public records and modeled classifications.
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