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Property profile & analytics
OFF-MARKET
Estimated value
$1,365,000
Office buildings
50 Prospect St, Waltham, MA 02453-8509
Individually Owned
22-yr Hold
Free & Clear
Property ID
US38-1766623
Property profile
Verified
Property type
Office buildings
Use group
OFFICE BUILDING
Year built
1984
Construction
STEEL FRAME
Total area
15,401 SF
Lot
0.49 ac (21,301 SF)
APN
WALT M:059 B:024 L:0019
UPID
US38-1766623
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
-
Internet Insurance Group, LLC, Insurance Agency
-
ConstructionInsurance.com Insurance Agency
-
Middlesex Human Service Agency, Inc. (MHSA) Social Service Agency Charitable Organization
-
Small Business Insurance Quotes Insurance Agency
-
World Insurance Associates LLC Insurance Agency
Value estimations
Realmo proprietary · 4 methods
AI Approach
AI
by Request
CAP Approach
CAP
by Request
Comparable Approach
Comparable
$904k
Blend (final)
Blend
$1.37M
Owner & transaction history
First Eastern Rlty Ptnshp · 22 yrs held
First Eastern Rlty Ptnshp
since 2004
6 recorded transactions
Zoning & alternative use
Permitted uses
Permitted uses
Allowed · conditional · prohibited
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 Waltham submarket · NOI estimate · Typical band, median & reading
Implied cap rate, NOI & submarket benchmark
Cap vs Waltham 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
by Request
ML approach
by Request
CAP Approach
CAP Return
Estimation
6%
by Request
6.5%
by Request
7%
by Request
Blend value · Realmo final
$1.37M
Range $1.23M – $1.50M · ±10%
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
$89 / 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
$38,572
Tax year 2024
Assessed value
$1,862,500
Assessed 2024
Previous assessed
$1,862,500
+0.0% YoY
Effective rate
2.07%
On assessed value
Assessed land
$541,800
Assessed improvement
$1,320,700
Comparables
6 recent transactions · within 1.5 miComparable in this city
6 recent transactions
Comparable in this City
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
1984
Construction
STEEL FRAME
Heating
FORCED AIR
Cooling
YES
Buildings
1
Stories
3
Units
1
Rooms
6
Bathrooms
9
Total area
15,401 SF
Lot
0.49 ac (21,301 SF)
APN
WALT M:059 B:024 L:0019
UPID
US38-1766623
Jurisdiction
WALTHAM
Metro division
CAMBRIDGE-NEWTON-FRAMINGHAM, MA METROPOLITAN DIVISION
Zoning & alternative use
Zoning · permitted uses
Permitted & conditional uses
Allowed uses · Special-permit conditions · Prohibited uses
Permitted & conditional uses
Allowed · special-permit conditions · prohibited
Building & site characteristics
From public records
Year built
1984
Construction
STEEL FRAME
Heating
FORCED AIR
Cooling
Yes
Stories
3
Buildings
1
Units
1
Rooms
6
Bathrooms
9
Lot
0.49 ac
Current owner
From public records · entity-resolved
First Eastern Rlty Ptnshp
Individual
Free & Clear · 22 yrs held
Mailing address
PO BOX 1595, WALTHAM, MA 02454
Ownership since
2004
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
Jun 20, 2013
—
Eastern Realty Part First
—
Deed Of Trust
related
$1,150,000 · Brookline Savings Bank
Apr 21, 2004
$1
First Eastern Rlty Ptnshp
First Eastern RT
Grant Deed
related
—
Apr 21, 2004
—
First Eastern Rlty Ptnshp
—
Grant Deed
related
$1,175,000 · Chart Bank
Oct 9, 1998
—
First Eastern RT
—
Deed Of Trust
related
$1,175,000 · Janet Cook Dunbar
Jun 30, 1997
—
First Eastern RT
—
Deed Of Trust
related
$1,200,000 · Somerset Savings Bank
Oct 13, 1988
$2,100,000
First Eastern RT
Prospect RT
Grant Deed
related
$1,600,000 · Guaranty First Tr Co
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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