21 Union Ave, Onset, MA 02571
OFF MARKET

21 Union Ave
Onset, MA 02571

Onset
  • 4 Beds
  • 3 Baths
  • 1,896 sqft

$718,200

Trulia Estimate
as of May 30, 2026
Est. Refi. Payment $4,265/mo*

$718,200

Trulia Estimate
as of May 30, 2026
Est. Refi. Payment $4,265/mo*
4 Beds
3 Baths
1,896 sqft

Local Information

Map showing home location
© Google
-- mins to
Commute Destination

Description

Live in one apartment and rent the other or restore this beauty to it's original single family glory. Beautifully located two blocks from Onset Bay and across the street from a school. Hardwood floors, second story deck and covered porch. Downstairs apartment has large bright family room and open kitchen, 2-3 bedrooms and 1.5 bath and stacked laundry. Upstairs apartment is 2 bedroom 1 bath, living room and kitchen with large central hall. Separate gas bills, single electric bill.
This property is off market, which means it's not currently listed for sale or rent on Trulia. This may be different from what's available on other websites or public sources.

Home Highlights

Parking
No Info
Outdoor
Porch, Deck
A/C
Heating only
HOA
None
Price/Sqft
No Info
Listed
No Info

Home Details for 21 Union Ave

Interior Features

Interior Details
BasementCeiling Fan
Heating & Cooling
Heating: GasHeating Fuel: Gas
Levels, Entrance, & Accessibility
Stories: 2Floors: Carpet, Hardwood, Linoleum Vinyl
Appliances & Utilities
Cable ReadyDishwasherDryerRefrigeratorWasher
Windows, Doors, Floors & Walls
Double Paned Windows

Exterior Features

Exterior Home Features
Roof: AsphaltDeckExterior: VinylGardenLawnPorch
Parking & Garage
Parking: Off Street

Property Information

Year Built
Year Built: 1939
Property Type / Style
Property Type: Multi Family

Community

Units in Building: 2

Lot Information

Lot Area: 6970 sqft

Price History for 21 Union Ave

DatePriceEventSource
03/24/2021ListingRemovedN/A
10/14/2015$259,000ListingRemovedN/A
07/16/2015$259,000PriceChange
N/A
04/17/2015$270,000Listed For SaleN/A
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Comparable Sales for 21 Union Ave

Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
0.32
Multi-Family Home
$577,500
10/23/25
5
2.5
1,575
0.42
Multi-Family Home
$920,000
08/05/25
6
4
2,807
0.43
Multi-Family Home
$920,000
08/05/25
6
4
2,807
0.73
Multi-Family Home
$450,000
02/20/26
4
2
1,488
2.14
Multi-Family Home
$355,000
04/21/26
4
2.5
2,151
3.27
Multi-Family Home
$750,000
08/13/25
5
5.5
2,257
4.16
Multi-Family Home
$525,000
12/24/25
4
3
2,186

Nearby homes

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Assigned Schools

These are the assigned schools for 21 Union Ave.
The GreatSchools Rating compares schools on a variety of school quality indicators including test scores, college readiness, equity and more. Learn more.

Neighborhood Overview

Neighborhood stats provided by third party data sources.

What Locals Say about Onset

At least 1 Trulia users voted on each feature.
  • 100 % Say it's walkable to grocery stores

  • 100 % Say yards are well-kept

  • 100 % Say car is needed

  • 100 % Say there's holiday spirit

  • 100 % Say there are sidewalks

  • 100 % Say there's wildlife

  • 100 % Say kids play outside

  • 50 % Say it's walkable to restaurants

Sourced by Trulia users. Learn more about our methodology.
  • ElliceAnn
    "Very walkable, but it would be nice to see more local small shops be welcoming of dogs, even if it was just water bowls/treats outside"
  • Trulia User
    "The downtown is quaint with shopping, eating, and laundry. Nearby are art galaries and beautiful beaches! There is so much to do with many planned events throughout the year. "
  • Trulia User
    "is a beautiful area to live in surrounded by water. friendly neighborhoods neighbors watch out for each other. great restaurants."
  • Trulia User
    "no sidewalks in most spaces for safety. Dogs aren't allowed on beaches. There are some areas they could be reasonably be allowed as long as owners picked up after them. There are parks & grassy areas. little shade. No dog parks. Lots of side streets."
  • Patrick S.
    "Summertime activities are the best in Onset. Fireworks on the Fourth of July concerts in the park every Wednesday night and even a kite festivals "
  • Ewhite1288
    "I think it’s great for dogs. Plenty of socialization. If they have a dog that is dog or people aggressive not a good neighborhood. "

LGBTQ Local Legal Protections

Apartments for Rent

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Homes for sale near 21 Union Ave

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Off Market Homes Near 21 Union Ave

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Homes for rent near 21 Union Ave

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21 Union Ave, Onset, MA 02571 is a 4 bedroom, 3 bathroom, 1,896 sqft multi-family built in 1939. 21 Union Ave is located in Onset, Onset. This property is not currently available for sale. The current Trulia Estimate for 21 Union Ave is $718,200.