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For sale
    • Price cut: $10K (7/15)
    $569,900

    500 Union St #5404, Westborough, MA 01581

    2beds
    1,423sqft
    : 
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    Condominium
    Built in 2007
    -- sqft lot
    $561,800 Zestimate®
    $400/sqft
    $471/mo HOA

    What's special

    Central air conditioningSeparate showerIn-unit laundrySunlit open-concept gemWarm and inviting atmosphereEn-suite bathroomFlexible den
    Step into your dream penthouse in the lively Bay State Commons of downtown Westborough! This sunlit, open-concept gem features 2 bedrooms, a flexible den, and 2 full baths, offering the perfect blend of comfort and style. Enjoy the ease of central air conditioning and in-unit laundry, plus the luxury of 2 private parking spaces. With soaring ceilings and expansive east-facing windows, this space is awash in morning light, creating a warm and inviting atmosphere. The primary suite is a serene escape, complete with two closets and an en-suite bathroom featuring a relaxing soaking tub and separate shower. As part of a professionally managed elevator building, you’ll be steps away from local favorites like Roche Bros., Panera Bread, and Ted’s Montana Grill. With downtown dining, the public library, and Westborough High School just around the corner, convenience is at your doorstep. Plus, enjoy the beautiful Bay State Green park right across the street, perfect for relaxation and play.
    83 days
    |
    495
    |
    8
    |

    Zillow last checked:

    Listing updated:

    Listed by:

    Patrick Mulligan 978-512-9354,

    Northeast Realty + Co. 617-249-7141,

    Christopher Chadzynski 617-285-6573

    Source: MLS PIN,MLS#: 73508590

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      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 2
      • Bathrooms: 2
      • Full bathrooms: 2
      Primary bedroom
      • Level: Fourth Floor
      Bedroom 2
      • Level: Fourth Floor
      Primary bathroom
      • Features: Yes
      Bathroom 1
      • Level: Fourth Floor
      Bathroom 2
      • Level: Fourth Floor
      Dining room
      • Level: Fourth Floor
      Kitchen
      • Level: Fourth Floor
      Living room
      • Level: Fourth Floor
      Heating
      • Central, Forced Air, Natural Gas
      Cooling
      • Central Air
      Appliances
      • Included: Range, Dishwasher, Microwave, Refrigerator, Washer, Dryer
      • Laundry: Fourth Floor, In Unit, Electric Dryer Hookup
      Features
      • Den
      • Flooring: Wood, Tile, Carpet
      • Windows: Insulated Windows
      • Has basement: No
      • Has fireplace: No
      Interior area
      • Total structure area: 1,423
      • Total interior livable area: 1,423 sqft
      • Finished area above ground: 1,423

      Property

      Parking
      • Total spaces: 2
      • Parking features: Attached, Deeded, Off Street
      • Attached garage spaces: 1
      • Uncovered spaces: 1
      Accessibility
      • Accessibility features: Accessible Entrance
      Details
      • Parcel number: 1735516
      • Zoning: IND

      Construction

      Type & style
      • Home type: Condo
      • Property subtype: Condominium
      • Attached to another structure: Yes
      Materials
      • Frame, Brick
      Condition
      • Year built: 2007

      Utilities & green energy

      • Sewer: Public Sewer
      • Water: Public
      • Utilities for property: for Electric Range, for Electric Dryer

      Community & HOA

      Community
      • Features: Public Transportation, Shopping, Tennis Court(s), Park, Golf, Conservation Area, Highway Access, Public School, Other
      • Security: Intercom
      HOA
      • Amenities included: Elevator(s)
      • Services included: Water, Sewer, Insurance, Maintenance Structure, Maintenance Grounds, Snow Removal, Reserve Funds
      • HOA fee: $471 monthly
      Location
      • Region: Westborough

      Financial & listing details

      • Price per square foot: $400/sqft
      • Tax assessed value: $470,300
      • Annual tax amount: $7,661
      • Date on market: 4/28/2026

        Estimated market value

        $561,800

        $534,000 - $590,000

        $3,066/mo

        Price history

        DateEventPrice
        7/15/2026Price change$569,900-1.7%$400/sqft
        Source: MLS PIN #73508590 Report a problem
        6/10/2026Price change$579,900-0.9%$408/sqft
        Source: MLS PIN #73508590 Report a problem
        5/27/2026Price change$585,000-0.8%$411/sqft
        Source: MLS PIN #73508590 Report a problem
        4/28/2026Listed for sale$589,900+5.3%$415/sqft
        Source: MLS PIN #73508590 Report a problem
        5/22/2025Sold$560,000+3.7%$394/sqft
        Source: MLS PIN #73362967 Report a problem
        5/2/2025Pending sale$540,000$379/sqft
        Source: BHHS broker feed #73362967 Report a problem
        4/23/2025Listed for sale$540,000+64.4%$379/sqft
        Source: MLS PIN #73362967 Report a problem
        3/31/2015Sold$328,500+16.3%$231/sqft
        Source: Public Record Report a problem
        9/10/2010Sold$282,500+18.2%$199/sqft
        Source: Public Record Report a problem
        3/5/2009Sold$239,000$168/sqft
        Source: Public Record Report a problem

        Public tax history

        YearProperty taxesTax assessment
        2025$7,661 +3.4%$470,300 +4.1%
        2024$7,411 +0.6%$451,600 +3.2%
        2023$7,366 -1.5%$437,400 +8.2%
        2022$7,476 +3.8%$404,300 +4.1%
        2021$7,203 +21.8%$388,500 +20.4%
        2020$5,914 -3.7%$322,800 -3.6%
        2019$6,139 +8.3%$334,900 +9%
        2018$5,671 -4.8%$307,200 -8.2%
        2017$5,958 +11.7%$334,700 +11.5%
        2016$5,336 +1.5%$300,300 +6.2%
        2015$5,255 -3.6%$282,700
        2014$5,453 +1.7%$282,700
        2013$5,363 +8%$282,700 +9.4%
        2012$4,966 +5.3%$258,500
        2011$4,715 $258,500
        Find assessor info on the county website

        Monthly payment

        Est. payment

        Payment breakdown

        Explore the cost of this home by adjusting the details. Changes won't be saved.
        All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
        HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
        Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.
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        Climate risks

        Neighborhood: 01581

        Getting around

        84 / 100
        Very Walkable
        58 / 100
        Bikeable

        Nearby schools

        GreatSchools rating

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