Individually Owned 
For Sale
1 / 23
$1,400,000
671 Tremont St,Unit 1, Boston, MA 02118
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Property summary
AI-generated overview
This commercial office/retail space comprises more than 1,850 square feet over two levels, including approximately 980 square feet on the street level and approximately 870 square feet on the lower level. The property is located on the corner of Pembroke and Tremont Street in Boston’s South End neighborhood, with entrances on both streets. Internally, the space is configured with three offices upstairs and four offices on the lower level, and it includes access to a shared outdoor patio with an upstairs neighbor. The setting is along a heavily traveled thoroughfare and provides proximity to neighborhood retail, dining, parks, and a library, with access to multiple major bus lines serving downtown.
Property profile
Verified
Property type
Other office properties
Use group
CONDOMINIUM OFFICES
Total area
1,846 SF
Lot
0.04 ac (1,846 SF)
Zoning code
CC
APN
CBOS W:04 P:02867 S:002
UPID
US38-1706220
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
by Request
Comparable Approach
Comparable
by Request
Blend (final)
Blend
$330k
Owner & transaction history
since 2005
3 recorded transactions
Zoning & alternative use
CC · Boston, MA
Top alternative use upside
Commercial (general)
$1.2M
+3.4%
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.
Unlock the complete Valuation workflow
Full NOI reconstruction, selected comps, alternative-use scenarios, data audit and PDF export.
Full NOI build-up · 6 steps
All 20 comparables with addresses
4 alternative uses screened
Sensitivity value band
Source audit · 6 inputs
PDF export
Professional Plan · 30 reports
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Summary
1
Valuation conclusion
Included free
Estimated market value
$330k
Value range
$297k – $363k
±10% around blend
Estimated value / SF
$179 / SF
Confidence
High
20 county-verified comps
Property data
75
Market benchmarks
67
Comparable evidence
100
Income certainty
100
$297k
blend $330k
$363k
Market-derived valuation under stabilized market assumptions. Desktop analysis. No physical inspection performed.
2
Subject property
Included free
GBA
1,846 SF
Lot area
0.04 ac
APN
CBOS W:04 P:02867 S:002
Zoning
CC
Assessed value
$424,600
Annual tax
$10,730
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
$10,730
Selected cap rate
4
Sales comparison
Partial preview
Sales approach indication
$548k
Weighted, 20 comps · high confidence
Evidence
20 found · 6 selected
County-verified recorded sales
Comparable
Sale dateSale price$ / SF
9.5 mi away · 1,346 SF
10.8 mi away · 1,901 SF
12.1 mi away · 1,997 SF
12.9 mi away · 1,632 SF
13.3 mi away · 1,512 SF
5
Sensitivity & risk
Partial preview
Downside
−10%
Base
$330k
Upside
+10%
Bounds of the ±10% band vs the blend — never simulated scenarios.
6
Current market position
Included free
Benchmark
Observed band ($/SF)AverageSubject delta
Submarket 170 sales
$615
-71%
County 181 sales
$543
-67%
Band = middle half (Q1–Q3) of recorded sale $/SF for this use type per geography; the diamond marks the subject at $179/SF. Delta below average reads as headroom. Source: Realmo CRE sales derivatives (county records).
7
Alternative use screening
Partial preview
Top alternative use
Commercial (general)
Gross theoretical uplift
+3%
vs current-use indication
Office Building · current use
Auto Repair, Garage
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
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.
Unlock the complete Cap Rate workflow
Full market tables, editable assumptions, comparable evidence, saved work and exports.
9-scenario matrix
Comparable evidence · 20 sales
NOI build-up · 9 steps
Market rates by use type
PDF export
Professional Plan · 30 reports
from $99/month
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Overview
Selected market yield
5.53%
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 · 5.53%
9.0%
NOI (est.)
$77k *
* 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$1.40M
Move the market yield to see immediate price impact.
Value / SF
$759
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
5.03%5.53%6.03%
$70k
$1.39M
$1.26M
$1.16M
$77k
$1.54M
$1.40M
$1.29M
$85k
$1.69M
$1.54M
$1.41M
NOI sensitivity ±10% across the selected-rate band (±0.5 pp) — derivation of the NOI above.
Comparable evidence
Partial preview
Recorded sales nearby
20 found
High confidence · county-verified
Closest comparable
$340k
5.6 mi · Feb 2026 · $254/SF
Property tax & assessments
Tax year 2024Property tax & assessments
Tax year 2024
Tax billed
$10,730
Tax year 2024
Assessed value
$424,600
Assessed 2024
Previous assessed
$448,600
-5.3% YoY
Effective rate
2.53%
On assessed value
Assessed improvement
$424,600
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
1,846 SF
Lot
0.04 ac (1,846 SF)
Zoning code
CC
APN
CBOS W:04 P:02867 S:002
UPID
US38-1706220
Jurisdiction
BOSTON
Metro division
BOSTON-QUINCY, MA METROPOLITAN DIVISION
Zoning & alternative use
CC · Boston, MAZoning CC · permitted uses
CC · 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
Heating
NONE
Buildings
1
Lot
0.04 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
Boston, MA
Recorded code
CC
Zoning Insight
What can be built and operated here — officially.
The district profile from the municipal source: what is on file for CC in Boston, MA.
What opens after registration
Zoning profile
Official documentVerified municipal sources with file download
Match provenanceAssignment basis, match tier and confidence
Private report access
See the official zoning profile for this address.
Registration is required before the official district profile is shown.
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Ownership Intelligence
Find the owner behind the property.
Unlock the evidence behind ownership: portfolio, transactions, debt and signals that help you decide who to contact next.
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.
Registration is required before any owner information is shown.
One complete report on every paid plan · 30 · 300 reports per month.
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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