307-309 Broadway South Boston, MA 02127
Individually Owned
3-yr Hold
~
Est. High Equity
Estimated value (blended)
$3.80M
Range $3.42M – $4.18M (±10%)
Implied cap rate
4.30%
In-place · NOI ÷ last sale
Property ID
US38-1085156
Property profile
Verified
Property type
Investment properties
Use group
OFFICE/RESIDENTIAL (MIXED USE)
Year built
1935
Construction
BRICK
Total area
6,740 SF
Lot
0.05 ac (2,194 SF)
Zoning code
RC
APN
SBOS W:06 P:00481 S:000
UPID
US38-1085156
Cap rate & NOI
Priority signal for investors
Implied cap rate, NOI & suggested price
Cap rate vs submarket · NOI estimate · 3 price anchors
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
$3.77M
CAP Approach
CAP
$2.53M
Comparable Approach
Comparable
$2.95M
Blend (final)
Blend
$3.80M
Owner & transaction history
since 2022
Last sale
$3.2M
2 recorded transactions
Zoning & alternative use
RC · South Boston, MA
Top alternative use upside
Restaurant
$4.5M
+19.8%
Office building
$4.1M
+9.4%
Auto repair, garage
$4.0M
+4.7%
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.
All 11 comparables with addresses
5 alternative uses screened
Sensitivity value band
Source audit · 10 inputs
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Summary
1
Valuation conclusion
Included free
Estimated market value
$3.80M
Value range
$3.42M – $4.18M
±10% around blend
Estimated value / SF
$564 / SF
Confidence
High
11 county-verified comps
Property data
75
Market benchmarks
100
Comparable evidence
100
$3.42M
blend $3.80M
$4.18M
Market-derived valuation under stabilized market assumptions. Desktop analysis. No physical inspection performed.
2
Subject property
Included free
GBA
6,740 SF
Lot area
0.05 ac
Year built
1935
Stories
4
APN
SBOS W:06 P:00481 S:000
Assessed value
$1,260,300
3
Income approach: direct capitalization
Partial preview
Income approach indication
$2.53M
Direct capitalization · @ 6.5% CAP return
@ 6% CAP return
$2.74M
@ 6.5% CAP return
$2.53M
@ 7% CAP return
$2.35M
4
Sales comparison
Partial preview
Sales approach indication
$3.10M
Weighted, 11 comps · high confidence
Evidence
11 found · 6 selected
County-verified recorded sales
Comparable
Sale dateSale price$ / SF
4.2 mi away · 7,018 SF
4.4 mi away · 8,160 SF
4.4 mi away · 8,160 SF
4.5 mi away · 7,160 SF
5.0 mi away · 6,455 SF
5
Sensitivity & risk
Partial preview
Downside
−10%
Base
$3.80M
Upside
+10%
Bounds of the ±10% band vs the blend — never simulated scenarios.
6
Current market position
Included free
Benchmark
Observed band ($/SF)AverageSubject delta
ZIP 50 sales
$562
+0%
Submarket 529 sales
$482
+17%
County 599 sales
$441
+28%
Band = middle half (Q1–Q3) of recorded sale $/SF for this use type per geography; the diamond marks the subject at $564/SF. Delta below average reads as headroom. Source: Realmo CRE sales derivatives (county records).
7
Alternative use screening
Partial preview
Top alternative use
Restaurant
Gross theoretical uplift
+20%
vs current-use indication
Office Building
Auto Repair, Garage
Commercial (general) · current use
Retail Stores
Values shown before conversion costs, entitlement costs, capital expenditures and stabilization risk.
8
Data & methodology
Included free
Building area
County record
Property tax
Not available
Assessed value
County record
Zoning designation
Not available
Operating expenses
Not available
Market rent
Not available
Actual rent roll
Not available
Tenant leases
Not available
Physical condition
Not inspected
Conversion costs
Not available
Not analyzed due to unavailable source data: tenant leases, physical condition and capital
requirements were not available for this desktop analysis. Cost Approach excluded due to
availability of income evidence.
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
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Full market tables, editable assumptions, comparable evidence, saved work and exports.
9-scenario matrix
Comparable evidence · 11 sales
Market rates by use type
PDF export
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Overview
Implied cap rate
4.30%
Implied, in-place cap rate for this investment properties
Estimated NOI ÷ last recorded sale. Refine with your own numbers in the full report.
Lower yield / higher price
Higher yield / lower price
5.0%
This property · 4.30%
9.0%
NOI (est.)
$224k *
Last sale · Aug 2022
$3.20M
* 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$5.21M
Move the market yield to see immediate price impact.
Value / SF
$773
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
3.80%4.30%4.80%
$202k
$5.31M
$4.69M
$4.20M
$224k
$5.89M
$5.21M
$4.67M
$246k
$6.48M
$5.73M
$5.13M
NOI sensitivity ±10% across the selected-rate band (±0.5 pp) — derivation of the NOI above.
Comparable evidence
Partial preview
Recorded sales nearby
11 found
High confidence · county-verified
Closest comparable
$3.85M
0.4 mi · Dec 2025 · $643/SF
Property tax & assessments
Tax year 2024Property tax & assessments
Tax year 2024
Assessed value
$1,260,300
Assessed 2024
Previous assessed
$1,311,600
-3.9% YoY
Assessed land
$475,800
Assessed improvement
$784,500
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
Off-Market
Year built
1935
Construction
BRICK
Heating
NONE
Buildings
1
Stories
4
Units
7
Total area
6,740 SF
Lot
0.05 ac (2,194 SF)
Zoning code
RC
APN
SBOS W:06 P:00481 S:000
UPID
US38-1085156
Jurisdiction
BOSTON
Metro division
BOSTON-QUINCY, MA METROPOLITAN DIVISION
Zoning & alternative use
RC · South Boston, MAZoning RC · permitted uses
RC · South Boston, MA
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Alternative use value scenarios
Repositioning upside vs current use
Alternative use deep dive — conversion cost, permits, timeline
Conversion cost estimate · Permit path & risks · Stabilized NOI per option
Building & site characteristics
From public records
Year built
1935
Construction
BRICK
Heating
NONE
Stories
4
Buildings
1
Units
7
Lot
0.05 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
South Boston, MA
Recorded code
RC
Ownership Intelligence
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Owner identityResolved entity and name variants
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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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