$1,332,100
- 2 Beds
- 2 Baths
- 1,300 sqft
21 Flagg St, Cambridge, MA 02138
Est. Refi. Payment $7,974/mo*
Refinance Your HomeHome Value
Trulia Estimate
$1.33MSince last month
Increased$29K (+2.2%)Since last year
Decreased$17K (-1.2%)Learn more about this home's value by checking out its Trulia Estimate, the value of nearby homes, and how much similar homes have sold for.
Trulia Estimate
The of this home's value decreased by -9% in the last 10 years
| Month | Estimated value |
|---|---|
2026 | |
| August 2026 | $1.33M |
| July 2026 | $1.3M |
| June 2026 | $1.3M |
| May 2026 | $1.3M |
| April 2026 | $1.33M |
| March 2026 | $1.28M |
| February 2026 | $1.21M |
| January 2026 | $1.21M |
2025 | |
2024 | |
2023 | |
Comparable sales
These are recently sold homes that have a similar location or other similar features to this home, like bedrooms, bathrooms, and square footage. Get a sense of the expected prices in the area by viewing these homes.Address | Distance | Property Type | Sold Price | Sold Date | Bed | Bath | Sqft |
|---|---|---|---|---|---|---|---|
0.19 | Single-Family Home | $1,625,000 | 10/21/25 | 2 | 2 | 1,406 | |
0.25 | Single-Family Home | $1,100,000 | 10/24/25 | 2 | 1.5 | 1,495 | |
0.18 | Single-Family Home | $982,500 | 08/28/26 | 2 | 2 | 750 | |
0.28 | Single-Family Home | $1,210,000 | 07/23/26 | 2 | 2 | 946 | |
0.02 | Single-Family Home | $2,505,000 | 11/19/25 | 3 | 2.5 | 2,130 | |
0.16 | Single-Family Home | $1,190,000 | 03/16/26 | 4 | 2 | 1,655 | |
0.17 | Single-Family Home | $2,460,000 | 07/08/26 | 3 | 2 | 2,265 | |
0.46 | Single-Family Home | $1,000,000 | 05/26/26 | 2 | 1.5 | 1,272 | |
0.38 | Single-Family Home | $1,615,000 | 09/08/25 | 3 | 2 | 1,804 | |
0.62 | Single-Family Home | $1,669,000 | 05/15/26 | 2 | 2 | 1,465 |
Nearby home prices
Get a sense of expected prices in the area by checking the value of nearby homes.Address | Distance | Price | Bed | Bath | Sqft | Status |
|---|---|---|---|---|---|---|
0.04 | $800,000 | 2 | 1 | 898 | For Sale | |
0.02 | $2,505,000 | 3 | 2.5 | 2,130 | Recently Sold | |
0.06 | $2,625,000 | 9 | 6 | 3,213 | Recently Sold | |
0.06 | $860,000 | 3 | 1 | 937 | Recently Sold | |
0.05 | $1,050,000 | 2 | 1.5 | 1,147 | Recently Sold | |
0.08 | $1,275,000 | 3 | 1 | 1,206 | Recently Sold | |
0.08 | $1,500,000 | 3 | 2 | 1,394 | Recently Sold | |
0.08 | - | 3 | 2.5 | 1,642 | Off Market | |
0.10 | - | 2 | 2 | 962 | Off Market | |
0.10 | $3,244,800 | 9 | 3 | 4,219 | Off Market | |
0.12 | $1,410,000 | 3 | 1.5 | 1,414 | Recently Sold | |
0.12 | $937,300 | 2 | 1 | 1,025 | Off Market |
Local Information
-- mins to
Home Highlights
Property Type
Single-Family Home
Living Area
1,300 sqft
Price/Sqft
$1,025
Parking
None
About this House
This single-family home is located at 21 Flagg St, Cambridge, MA. 21 Flagg St is in the Riverside neighborhood in Cambridge, MA and in ZIP code 02138. This property has 2 bedrooms, 2 bathrooms and approximately 1,300 sqft of floor space.
21 Flagg St, Cambridge, MA 02138 is a 2 bedroom, 2 bathroom, 1,300 sqft single-family home in Riverside. More recently, it was listed as a rental in May 2023 with an asking price of $5,000 per month. That rental listing was removed on June 13, 2023. This property is not currently displayed as for sale or rent on Trulia. The Trulia Estimate is $1,332,100, with a rent estimate of $4,838/month.
Home Details for 21 Flagg St
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Property Type / Style Property Type: Single Family Home |
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Appliances & Utilities DishwasherDryerWasher |
Levels, Entrance, & Accessibility Floors: Hardwood |
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Parking & Garage Parking: None |
Price and Tax history
| Date | Event | Price |
|---|---|---|
Jun 13, 2023 Source: Zillow Rentals | ListingRemoved | |
May 31, 2023 Source: Zillow Rentals | Listed For Rent | $5,000 |
Market trends in Cambridge
Last updated July 2026
Avg. sale price
$1.1M
Sale-to-List Price
100.8%
0.6%MoM
Price per sq ft
$945
$3MoM
Available listings
240
45MoM
Around this home
What Locals Say about Riverside
At least 16 Trulia users voted on each feature.
81 % Say there are sidewalks
80 % Say it's walkable to restaurants
76 % Say people would walk alone at night
63 % Say parking is easy
60 % Say it's walkable to grocery stores
59 % Say streets are well-lit
57 % Say it's dog friendly
52 % Say they plan to stay for at least 5 years
50 % Say yards are well-kept
48 % Say kids play outside
38 % Say car is needed
38 % Say it's quiet
32 % Say there are community events
31 % Say there's holiday spirit
30 % Say neighbors are friendly
25 % Say there's wildlife
Sourced by Trulia users. Learn more about our methodology.
LGBTQ Local Legal Protections
LGBTQ Local Legal Protections
Frequently asked questions about 21 Flagg St
- What is 21 Flagg St estimated to be worth?Trulia's estimated value for 21 Flagg St in Cambridge, MA is $1,332,100.
- Is Cambridge a buyer's or seller's market?Cambridge is currently a balanced market, based on recent for-sale activity.
- What's the median sale price in Cambridge?The median sale price in Cambridge is $1.1M. That is roughly unchanged from the prior month.
- What do residents say about the Riverside neighborhood?Residents describe the Riverside neighborhood in Cambridge, MA as pedestrian-friendly, walkable to restaurants, and easy to park in. See recently sold homes in Riverside, Cambridge.
- Does 21 Flagg St have laundry facilities?Yes, 21 Flagg St in Cambridge, MA has in-unit laundry.

