643 Waltham St is a 1,720 square foot house on a 5.75 acre lot with 5 bedrooms and 1.5 bathrooms. Based on Redfin's Lexington data, we estimate the home's value is $1,348,551.
Single-familyProperty Type
1915Year Built
5.75 acresLot Size
$784Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,348,551
$21K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 8.4% lower than the average sale price ($1.47M) of 6 comparable homes.
As the MLS and public records start to fill up, we'll list the details here.
Year
Property tax
Land + Additions
Assessment*
2026
$15,455
$1,155,000 + $100,500
$1,255,500
2025
$1,397,000 + $119,000
$1,516,000
2024
$1,464,000 + $136,000
$1,600,000
2023
$1,348,000 + $127,000
$1,475,000
2022
$1,242,000 + $123,000
$1,365,000
2021
$1,141,000 + $118,000
$1,259,000
2020
$1,141,000 + $118,000
$1,259,000
2019
$1,095,000 + $111,000
$1,206,000
2018
$1,050,000 + $101,000
$1,151,000
2017
$1,027,000 + $107,000
$1,134,000
2014
$775,000 + $169,000
$944,000
2013
$775,000 + $163,000
$938,000
2012
$775,000 + $163,000
$938,000
2011
$795,000 + $163,000
$958,000
2010
$795,000 + $163,000
$958,000
2009
$830,000 + $166,000
$996,000
Tax history for 643 Waltham St
Year
Property tax
Land + Additions
Assessment*
2026
$15,455
$1,155,000 + $100,500
$1,255,500
2025
$1,397,000 + $119,000
$1,516,000
2024
$1,464,000 + $136,000
$1,600,000
2023
$1,348,000 + $127,000
$1,475,000
2022
$1,242,000 + $123,000
$1,365,000
2021
$1,141,000 + $118,000
$1,259,000
2020
$1,141,000 + $118,000
$1,259,000
2019
$1,095,000 + $111,000
$1,206,000
2018
$1,050,000 + $101,000
$1,151,000
2017
$1,027,000 + $107,000
$1,134,000
2014
$775,000 + $169,000
$944,000
2013
$775,000 + $163,000
$938,000
2012
$775,000 + $163,000
$938,000
2011
$795,000 + $163,000
$958,000
2010
$795,000 + $163,000
$958,000
2009
$830,000 + $166,000
$996,000
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Property details
Interior
Basement Information
Basement Sq. Ft: 1,056
Bathroom Information
# of Full Baths: 1
# of 1/2 Baths: 1
Heating & Cooling
Heating Type: Forced Hot Water
Room Information
# of Rooms: 7
Exterior
Exterior Information
Physical Condition: Average
Building Style Type: Conventional
Exterior Wall: Shingle
Roof Shape Type: Gable
Property Information
Living Sq. Ft: 1,720
Gross Sq. Ft: 3,492
Ground Floor Sq. Ft: 914
# of Units: 1
# of Stories: 2
Lot Information
# of Buildings: 1
Land Sq. Ft: 250,470
Municipality Name: LEXINGTON
Acres: 5.75
Zoning Code: RO
State Use Description: MIXED USE-PRIM RES & COMM
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 5
Baths: 1.5
Sq. Ft.: 1,720
Stories: 2.0
Lot Size: 5.75 acres
Style: Single Family Residential
Year Built: 1915
Year Renovated: —
County: Middlesex County
APN: 868102S
Home facts updated by county records on Jul 29, 2026
Around this home
Schools
Bridge Elementary School
Public K-5 • Assigned • 1.0mi
10/10
Jonas Clarke Middle School
Public 6-8 • Assigned • 0.2mi
10/10
Lexington High School
Public 9-12 • Assigned • 1.0mi
10/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Local insights from Redfin agents
Lexington continues to be a competitive Seller's market driven by its historic appeal & location. With buildable land exhausted, true inventory growth is very constrained; development mostly replaces existing homes. New zoning laws will eventually...