Rare opportunity for Concord Center living just moments from shops, dining, and the library. This spacious, thoughtfully designed condo offers an open layout with comfortable living and dining areas, a dedicated office space, and a charming breakfast nook. Enjoy the convenience of in-unit laundry and an oversized enclosed deck--ideal for year-round relaxation or entertaining. Updated baths bring a modern feel, highlighted by a luxurious radiant heated bathroom floor for added comfort. Easy access via ramp from the upper parking area or elevator from the main entrance. Includes assigned parking and professional management. Move-in ready.
Amenities
In-unit amenities
These amenities may not be available for every unit
View estimated energy costs and solar savings for this home
Internet
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Property details
Interior
Bathroom Information
# of Full Baths: 1
# of 1/2 Baths: 1
Heating & Cooling
Heating Type: Forced Air
Room Information
# of Rooms: 3
Exterior
Exterior Information
Physical Condition: Average
Exterior Wall: Brick
Roof Shape Type: Flat
Property Information
Living Sq. Ft: 1,378
Gross Sq. Ft: 1,594
# of Units: 1
# of Stories: 1
Parking & Garage Information
Parking Type: Basement Garage
Garage / Carport Type: Basement
Lot Information
# of Buildings: 1
Land Sq. Ft: 194,925
Municipality Name: CONCORD
Acres: 4.4749
Zoning Code: B
State Use Description: CONDOMINIUM
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 1
Baths: 1.5
Sq. Ft.: 1,378
Stories: 1.0
Lot Size: —
Style: Condo/Co-op
Year Built: 1952
Year Renovated: 1955
County: Middlesex County
APN: 678814S
Home facts updated by county records on Jul 29, 2026
Sale and tax history for 100 Keyes Rd #220
Sale History
Tax History
Date
Event
Price
MLSPIN #73512009
Jun 22, 2026
Rental Removed
$3,350
$2/sq ft
May 5, 2026
Listed for Rent
$3,350
$2/sq ft
MLSPIN #73220620
May 21, 2024
Rental Removed
$3,100
$2/sq ft
Apr 5, 2024
Listed for Rent
$3,100
$2/sq ft
Public Records
Aug 1, 1984
Sold
$150,000
$109/sq ft
Year
Property tax
Land + Additions
Assessment*
2026
$11,896 (+11.6%)
$911,600
2025
$10,656 (−7.5%)
$803,600
2024
$11,526 (+22.3%)
$877,800
2023
$9,421 (−6.2%)
$726,900
2022
$10,047 (+15.3%)
$680,700
2021
$8,713 (+6.3%)
$591,900
2020
$8,195 (+1.9%)
$575,900
2019
$8,040 (−1.9%)
$566,600
2018
$8,194 (+1.6%)
$573,400
2017
$8,068 (+20.1%)
$573,400
2016
$6,718 (+4.1%)
$482,600
2015
$6,452 (−4.0%)
$451,500
2014
$6,721 (−1.0%)
$465,100
2013
$6,789 (+4.2%)
$482,500
2012
$6,514 (+1.6%)
$479,700
2011
$6,411 (+4.6%)
$489,400
2010
$6,130 (−0.6%)
$468,300
2009
$6,170
$518,500
Around this home
Schools
Places
Transit
9/10
Alcott Elementary School
Public, PreK-5 • Assigned • 0.7mi
8/10
Concord Middle School
Public, 6-8 • Assigned • 2.6mi
10/10
Concord Carlisle High School
Public, 9-12 • Assigned • 1.0mi
Provided by GreatSchools
About Main Street Historic
District
Main Street Historic District, located between Monument Square and the Old North Bridge, is a historic and walkable Concord neighborhood with Federal-era streetscapes and a museum-rich downtown edge. The neighborhood’s character concentrates around Main Street at Walden Street, where brick storefronts, independent galleries, and sidewalk cafés set a steady daytime rhythm. Architectural details read like a timeline—Colonial and Georgian homes, civic buildings, and preserved facades along tree-lined blocks. Concord Museum anchors local history with rotating exhibitions and a strong sense of place. The Umbrella Arts Center adds studios, performances, and a creative pulse near the commercial core. Small greens and the Mill Brook corridor soften the streets with pocket views of water and stonework.
Provided by Walk Score and Local Logic
Public facts and zoning for 100 Keyes Rd #220
Beds
1
Baths
1.5
Sq. Ft.
1,378
Stories
1
Lot Size
—
Style
Condo/Co-op
Year Built
1952
Year Renovated
1955
County
Middlesex County
APN
678814S
Home facts updated by county records on Jul 29, 2026.
Additional resources
Zoning
Working on getting current and accurate zoning information for this home.Learn more
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
1/10 Fire Factor
Unlikely to be in a wildfire in next 30 years
5/10 Heat Factor
7 days above 97° expected this year, 15 days in 30 years
6/10 Wind Factor
27% chance of strong winds in next 30 years
2/10 Air Factor
1 unhealthy days expected this year, 1 days in 30 years
Provided by First Street
Thinking of selling?
Estimated sale price
$718,000 – $869,000
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Listing agent: Mark Carter (6179222528)
The property listing data and information, or the Images, set forth herein were provided to MLS Property Information Network, Inc. from third party sources, including sellers, lessors and public records, and were compiled by MLS Property Information Network, Inc. The property listing data and information, and the Images, are for the personal, non-commercial use of consumers having a good faith interest in purchasing or leasing listed properties of the type displayed to them and may not be used for any purpose other than to identify prospective properties which such consumers may have a good faith interest in purchasing or leasing. MLS Property Information Network, Inc. and its subscribers disclaim any and all representations and warranties as to the accuracy of the property listing data and information, or as to the accuracy of any of the Images, set forth herein.
In-unit amenities
These amenities may not be available for every unit