171 Lake St, Waltham MA 02451
Waltham, MA 02451
$798,888
Est. $4,915/month
Estimate assumptions
20% down, a 30-year loan at 6.5%, and $200/month estimated insurance.
Includes the supplied property-tax and HOA inputs; missing inputs contribute $0. HOA fees with an unspecified frequency are treated as monthly. PMI and closing costs are excluded.
Adjust the payment calculatorTrack this home for price, status, and open-house alerts.
Open House Schedule
11
Sep
Friday, September 11
11:30 AM - 12:30 PM EDT
10
Sep
Thursday, September 10
5:30 PM - 6:30 PM EDT
13
Sep
Sunday, September 13
12:30 PM - 1:30 PM EDT
About this home
A rare turnkey 2-family with lots of options! Move into one unit and have the tenant subsidize some of your mortgage, rent out both, or tear down and rebuild. Potential to build 2 side-by-side townhomes on the existing lot (buyer to do all due diligence). The larger units feature hardwood floors, a renovated eat-in kitchen, an updated bathroom, and split air conditioning/heating units. The smaller unit features hardwood floors, a smaller eat-in kitchen, a cozy bathroom, and a separate entrance. Separate driveways allow for autonomy for each unit. Flat lot with frontage on both streets. Easy access to rt 128/95, bus 61, proximity to Lazazzero Playground and Hardy Pond, MacArthur Elementary School, and the newly built state-of-the-art Waltham High School.
View in the App
Save this property, schedule tours instantly, and get alerts when the price drops
Scan with phone
Public Records & Permits
Log in to view assessor & tax records, ownership history, and recent building permits for this property.
BMN Estimate
Get the number an algorithm can't give you
A free agent CMA factors in condition, upgrades, and the street — the things comps alone can't see.
Recently Sold Nearby
Property History
Market Insights
Property Timeline
Listed for Sale
Sep 8, 2026
$798,888
Original listing
Agent: Masha Senderovich
Office: Keller Williams Realty
Listed for Sale
Sep 8, 2026
$798,888
Original listing
Agent: Masha Senderovich
Office: Keller Williams Realty
Listed for Sale
Sep 8, 2026
$798,888
Original listing
Agent: Masha Senderovich
Office: Keller Williams Realty
| Date | Event | Price | Change | $/sqft | Details |
|---|---|---|---|---|---|
| 09/08/2026 | 🏠 Listed for Sale | $798,888 | - | - | Original listing |
| 09/08/2026 | 🏠 Listed for Sale | $798,888 | - | - | Original listing |
| 09/08/2026 | 🏠 Listed for Sale | $798,888 | - | - | Original listing |
Tax History
| Year | Taxes | Assessment |
|---|---|---|
| 2026 | $8,110 | $785,900 |
Financial Details
Annual Property Tax
$8,110
Tax Year 2026
Assessed Value
$785,900
Facts & Features
Home Facts
Type
Residential Income
Style
2 Family - 2 Units Side by Side
Year Built
1930
Living Area
1,795 sq ft
Lot Size
0.10 acres
Stories
2
Bedrooms
3
Full Baths
2
Total Rooms
8
Investment Metrics
Units
2
Unit 1 Rent
— · N
Unit 2 Rent
$1,850/mo · N
Total Monthly Rent
$1,850/mo
Gross Income
$22,200
Net Operating Income
$22,200
Cap Rate
2.78%
Interior
Heating
None
Cooling
None
Flooring
None
Appliances
None
Fireplace
None
Basement
Partial
Laundry
None
Features
Living Room, Kitchen, Laundry Room
Exterior
Construction
None
Architecture
None
Roof
None
Features
None
Pool
None
Spa
None
Fencing
None
Patio/Porch
None
Parking
Features
Paved Drive
Total Spaces
4
Utilities
Electric
None
Water
Public
Sewer
Public Sewer
Gas
None
Other
None
Financial
Annual Tax
$8,110
Assessed Value
$785,900
HOA & Community
Fee Includes
None
Amenities
None
Optional Fee Includes
None
MA Disclosures
Lead Paint
Unknown
Seller Disclosures
Pre-existing Termite Damage In The Basement. The Seller Has Monitored It As Advised By The Previous Seller—no Known New Activity Since Purchase. Roof Is Thought To Be At Least 20 Years Old.
Additional Details
Possession
None
Accepted Financing
None
Structure Type
[]
Sq Ft Source
Public Record
Documents
None
County
Middlesex
Property Overview
Property Type
2 Family - 2 Units Side by Side
Listing Type
For Sale
Year Built
1930
Bedrooms
3
Full Bathrooms
2
Living Area
1,795 sq ft
Total Rooms
8
Stories
2
Levels
2
Floor Layout
Interactive room guide
Floor Layout
Finished Area
1,795 sq ft above grade
Display Options
Room Markers
OOffice (1)
KKitchen (1)
BRBedroom (5)
BABathroom (4)
DDining (1)
LLiving (2)
Conceptual diagram based on MLS room data. It is not to scale and is not a substitute for architectural plans or on-site measurements.
Interior Features
Flooring:
Appliances:
Interior Features:
Living Room, Kitchen, Laundry Room
Windows:
Basement:
Partial
Laundry:
Security:
Construction & Materials
Year Built:
1930
Structure Type:
Exterior Materials:
Roof:
Foundation:
Stone
Stories:
2
Heating, Cooling & Utilities
Heating:
Cooling:
Hot Water:
Water Source:
Public
Sewer:
Public Sewer
Energy Features:
Exterior & Lot
Exterior Features:
Patio & Porch:
Fencing:
Other Structures:
Lot Features:
Corner Lot
Road Surface:
Parking & Garage
Total Parking Spaces:
4
Parking Features:
Paved Drive
Nearby Schools
School information not available for this location.
Monthly Payment Calculator
Monthly Payment
$0
Principal, interest, taxes & insurance
Loan Amount
$0
After down payment
Total Interest
$0
Over life of loan
Total Cost
$0
Including down payment
%
Down: $0
%
Monthly Payment Breakdown
Principal & Interest
$0
Property Tax
$676
Homeowners Insurance
$200
PMI (if <20% down)
$0
Loan Summary
Total of 360 payments
$0
Total principal paid
$0
Total interest paid
$0
Rate Impact
-0.5% Rate
$0/mo
Save $0/mo
Current Rate
$0/mo
+0.5% Rate
$0/mo
Cost $0/mo
Payment Over Time
Year 1
95% Interest
Year 15
50/50
Year 30
95% Principal
* Estimates only. Actual payments may vary. Consult with a lender for accurate figures.
Location
Loading map...
Neighborhood
171 Lake St, Waltham MA 02451
Waltham, MA 02451
Listing Information
Listing Agent
Masha Senderovich
Listing Office
Keller Williams Realty
Office Phone
617-969-9000
Agent MLS ID
CT002237
Office MLS ID
BB5962
Listing Data Updated
Sep 8, 2026 12:06 PM EDT
Listing information is deemed reliable but not guaranteed. Data provided by MLS Property Information Network, Inc. All information should be independently verified.
Contact Us
Ask about this property — free, no obligation.
Similar Homes for Sale
Comparable Properties
Customize Comparable Search
Finding comparable properties...
Loading market insights for Waltham.