Skip to content
421 Union Avenue, Mount Vernon, photo 1
View all 22 photos
421 Union Avenue, photo 2
421 Union Avenue, photo 3
421 Union Avenue, photo 4
421 Union Avenue, photo 5
421 Union Avenue, photo 6
421 Union Avenue, photo 7
421 Union Avenue, photo 8
421 Union Avenue, photo 9
421 Union Avenue, photo 10
421 Union Avenue, photo 11
421 Union Avenue, photo 12
421 Union Avenue, photo 13
421 Union Avenue, photo 14
421 Union Avenue, photo 15
421 Union Avenue, photo 16
421 Union Avenue, photo 17
421 Union Avenue, photo 18
421 Union Avenue, photo 19
421 Union Avenue, photo 20
421 Union Avenue, photo 21
421 Union Avenue, photo 22

421 Union Avenue

Mount Vernon, NY 10550 · Westchester County

Beds
3
Baths
1.5
Sqft
5,227
Status
Active
On site
11 days

Know your budget before you tour. Get pre-qualified

About this home

Charming and full of character, this inviting home offers a wonderful blend of classic details, comfortable living spaces, and a beautifully open outdoor setting. The front exterior creates an appealing first impression with its gabled roofline, welcoming entry, mature landscaping, and a broad front window that brings natural light into the home. A large tree and neatly maintained lawn add to the established feel, while the front walkway leads to a covered entry that feels warm and approachable. One of the standout features is the enclosed front porch or sunroom, a bright transitional space with abundant windows, rich wood flooring, a wood ceiling, and a hanging light fixture that enhances the home's timeless personality. This area provides a pleasant spot to enjoy morning light, set up a reading nook, or create an additional sitting space. From there, French doors open into the main living area, where natural light, tall ceilings, and dark wood floors create a comfortable atmosphere with a classic look. The living room offers a spacious central gathering area with multiple windows, ceiling fan lighting, and an easy flow into adjacent rooms. French doors add visual interest and separation while still keeping the layout open and connected. Just beyond, the dining room is generous in length and well suited for everyday meals, larger gatherings, or a flexible combination of dining and workspace needs. Large windows brighten the room, and the continued wood flooring helps tie the main level together. The kitchen presents a stylish contrast of dark cabinetry, light countertops, and a mosaic tile backsplash. Recessed lighting and a window above the sink add brightness, while the layout provides good cabinet storage and practical work areas. An adjoining breakfast nook or casual dining corner is surrounded by windows, creating a cheerful place for coffee, meals, or extra prep space. The bedroom shown is filled with natural light and features wood flooring, multiple windows, and a simple, comfortable layout that feels airy and efficient. The bathroom has been updated with clean finishes, including a modern vanity, bright wall tile detail, and a window that adds natural light and ventilation. Outside, the backyard is a major highlight. The lot opens to a large lawn framed by mature trees and established hedges, offering a peaceful backdrop and a sense of openness. A substantial paved area provides room for outdoor seating, entertaining, or other uses, while the expansive green space offers flexibility for recreation, gardening, or simply enjoying the setting. The deep yard and surrounding greenery make this outdoor area especially memorable. Throughout the home, the combination of classic architectural touches, bright windows, wood flooring, and updated kitchen and bath spaces creates an appealing opportunity for someone looking for character and functionality in one property. This home offers inviting indoor spaces, a welcoming front presence, and an exceptional backyard that adds meaningful room to spread out and enjoy the outdoors.

Listed with Prominent Properties Sotheby's · Dominique Freeman · Source: OneKey MLS

One Key MLS

Information provided by One Key MLS, and is deemed reliable but not guaranteed accurate. Data last updated: Oct 5, 2026, 12:07 AM ET. ©2026 One Key MLS.

Estimate your monthly payment

Estimate your mortgage payment, including the principal and interest, taxes, insurance, HOA, and private mortgage insurance.

$3,867.00Total / mo

Estimated monthly payment

Principal & interest
$2,807.67 (72.6%)
Taxes
$859.33 (22.2%)
Insurance
$200.00 (5.2%)

Representative rates

Representative rates only, indicative for comparison. Edit the interest rate for your own quote; your lender’s numbers vary with credit, points, and insurance.

Never miss a property

Be the first to know when a Westchester County home hits the market.

Save this search

Market Insights

The market around Mount Vernon, NY

Current Listings

New in the last 30 days

44

Oct 2026

Average Price

Active listings

$640,238

Oct 2026

Average days on market

Active listings

146 days

Oct 2026

Computed from 269 active OneKey MLS listings in Mount Vernon, NY.

Similar homes in Westchester County

See all 938
83 Krystal Drive, Somers, $639,000
83 Krystal Drive, Somers, NY
Photo 1 of 20
New

$639,000

2 Bed • 2.5 Bath • 1,612 Sq. Ft.

83 Krystal Drive

Somers, NY 10589

Listed with ERA Insite Realty Services

811 Route 35, Cross River, $699,000
811 Route 35, Cross River, NY
Photo 1 of 4
Coming SoonNew

$699,000

2 Bed • 1.5 Bath • 1,650 Sq. Ft.

811 Route 35

Cross River, NY 10518

Listed with Coldwell Banker Realty