Date
Details
Price
Change
Source
9/16/2026
Listed
$449,000
—
MLS
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
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Property Description
Spectacular! One of a kind reminiscent of NYC/ Boston Brownstone townhouse Style home built in the 1800's. Tons of charm. This unique end unit home offers 5 levels of living space. Impressive woodwork on the stair way. There is a full kitchen with plenty of built ins as well as a Butler's Kitchen. 2 fireplaces. Enclosed outdoor patio/sitting room. Gas heat. Detached carriage/barn. Plenty of off-street parking with level private yard. Spacious bedrooms, office room, den, family room. Cathedral ceiling. Located on a Cul de sac. Seller to find suitable housing.
Full Property Details
Full Property Details for 11 William St
General
- Price: $449,000
- Taxes: (July 2026-June 2027)
- Status: Active
- Type: Single Family
- Source: SMARTMLS
- MLS ID: 24205552
- Updated: Today (9/16/2026)
- Added to Site: Today
Interior
- Number of Rooms: 10
- Rooms/Areas: Bonus Room
- Interior Features: Cable - Available
- Fireplace: Yes
- Number of Fireplaces: 2
- Appliances: Gas Range, Microwave, Range Hood, Refrigerator, Dishwasher, Washer, Electric Dryer, Wine Chiller
Rooms
Bathrooms
- Total Bathrooms: 2
- Full Bathrooms: 1
- Half Bathrooms: 1
Bedrooms
- Total Bedrooms: 3
- Primary Bedroom: Primary Bedroom - Ceiling Fan, Fireplace, Laminate Floor, 18 x 17, Upper
- Bedroom 1: Bedroom - Ceiling Fan, Laminate Floor, 14 x 13, Upper
- Bedroom 2: Bedroom - Ceiling Fan, Laminate Floor, 15 x 10, Upper
Other Rooms
- Living Room: Living Room - 9 ft+ Ceilings, Fireplace, Hardwood Floor, 19 x 15, Main
- Family Room: Family Room - Tile Floor, 17 x 12, Lower
- Kitchen: Kitchen - Built-In Hutch, Built-Ins, Pantry, Patio/Terrace, Tile Floor, 15 x 11, Lower
- Dining Room: Dining Room - 9 ft+ Ceilings, Hardwood Floor, 15 x 13, Main
- Office: Office - Hardwood Floor, 8 x 7, Upper
- Game room: Yes
- Game Room: Rec/Play Room - Cathedral Ceiling, Vaulted Ceiling, Half Bath, Hardwood Floor, 17 x 23, Upper
- Rec Room: Cathedral Ceiling, Vaulted Ceiling, Half Bath, Hardwood Floor, 17 x 23, Upper
- Laundry: Lower Level
- Other Room 1: Other - Patio/Terrace, Lower
- Other Room 2: Other - Breakfast Nook, Wet Bar, Main
Exterior
- Exterior Features: Sidewalk, Patio
- Color: Red
Parking
- Total Spaces: 4
- Parking: Off Street Parking
Location
- County: New Haven
- Driving Directions: Main St. to E. Main St. to Tremont St. to William St.
School Information
- Elementary School: Per Board of Ed
- Middle School: Ansonia
- High School: Ansonia
Heating & Cooling
- Cooling Type: Window Unit
- Heating Type: Hot Water, Natural Gas
- Heating Fuel: Natural Gas
- Water Heater: Electric, 40 Gallon Tank
Utilities
- Sewer: Public Sewer Connected
- Water: Public Water Connected
Structural Information
- Architectural Style: Other
- Construction Status: No/Resale
- Exterior Const.: Brick
- Basement Desc.: Full, Partially Finished, Full With Walk-Out
- Roof: Asphalt Shingle
- Attic: Yes
- Square Feet: 2,624
- Above Ground: 2,624 Sq. Ft.
- Year Built: 1883
Lot Features
- Lot Size (Acres): 0.3
- Zoning: B
- Lot Description: Fence - Partial, Level Lot, On Cul-De-Sac
Financial Considerations
- Assessment Amount: $242,410
- Tax Year: July 2026-June 2027
Disclosures and Reports
- Property ID: 1047626
Buyer's Brokerage Compensation: Contact Listing Agent
Not binding unless confirmed by separate agreement among applicable parties.
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Price & Sales History for 11 William St
Tax History
Tax History for 11 William St
Year
Property Taxes
Change
Tax Assessment
Change
2025
$6,921
8%
$242,410
—
2023
$6,421
1%
$242,410
—
2023
$6,361
6%
$242,410
52%
2022
$6,029
—
$159,500
—
2021
$6,029
—
$159,500
—
2020
$6,029
—
$159,500
—
2019
$6,029
1%
$159,500
—
2018
$5,953
5%
$159,500
5%
2017
$5,658
—
$151,600
—
2016
$5,658
-1%
$151,600
—
2015
$5,688
-3%
$151,600
—
2014
$5,853
-2%
$151,600
—
2011
$5,964
—
$151,600
—
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
Estimate the Cost
Estimate the Cost for 11 William St
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- Single Family
- Active
- Updated 7 days ago
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- Single Family
- Active
- Updated 4 days ago
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- Active
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- Single Family
- Active
- Updated 5 hours ago
- 2Beds
- 2Total Baths
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- Single Family
- Active
- Updated 2 days ago
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- Single Family
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- Commercial
- Closed
Listed by Berkshire Hathaway NE Prop.
Sold by Melissa Casey
Sold by Melissa Casey
- Single Family
- Closed
- 3Beds
- 2Total Baths
- 1,924Sq. Ft.
Listed by Keller Williams Realty Prtnrs.
Sold by Audra DiGello
Sold by Audra DiGello
11 William Street, Ansonia, CT 06401 (MLS# 24205552) is a Single Family property with 3 bedrooms, 1 full bathroom and 1 partial bathroom. 11 William Street is currently listed for $449,000 and was received on September 16, 2026. This property is listed by Carmen Burns from our Shelton Office.Want to learn more about 11 William Street? Do you have questions about finding other Single Family real estate for sale in Ansonia? You can browse all Ansonia real estate or contact a Coldwell Banker agent to request more information.