Mountainside Boro Homes for Sale

Welcome to Mountainside Boro, a charming town nestled in Union County, New Jersey. This idyllic location offers a perfect blend of small-town charm and modern conveniences, making it an ideal place to call home.

Mountainside Boro is known for its picturesque streets, lush greenery, and a strong sense of community. Residents enjoy a peaceful and serene environment while still being close to all the amenities that Union County has to offer.

If you are looking for homes for sale in Mountainside Boro, you are in luck. True to its name, this area boasts a variety of beautiful properties that cater to different tastes and preferences. From cozy single-family homes to spacious estates, there is something for everyone in Mountainside Boro.

Whether you are a first-time homebuyer, a growing family, or someone looking to downsize, Mountainside Boro has the perfect home for you. With easy access to schools, parks, shopping, and dining options, this town has everything you need for a comfortable and fulfilling lifestyle.

Don't miss the opportunity to make Mountainside Boro your new home. Explore the available homes for sale and discover the beauty and charm of this wonderful town in Union County, New Jersey.

Newest Mountainside Boro Homes for Sale

$1,275,000

4 Beds ⋅ 3 Baths

Turn-key and beautifully updated, this expansive 4-bed, 3-bath home offers approx. 3,100SF of 1st and 2nd floor finished living space (plus additional finished basement area), on a level .36-acre property in the heart of Mountainside with expansive outdoor entertainment area & pool. The inviting layout is designed for daily living and high-end entertaining. The chef's kitchen features a Wolf range and paneled Sub-Zero refrigerator, flowing seamlessly into spacious living and dining rooms. A dramatic 26x24 great room enhanced by a vaulted ceiling and custom millwork, includes a refreshed dry bar, access to the outdoor living & adjacent oversized mudroom. A 1st-floor bedroom with an adjacent gut renovated (2021) full bath provides flexibility for guests or a home-office. Upstairs are 3 beds and 2 full baths, incl. a generous primary suite with Gas FP, walk-in-closet and en-suite bath. The finished basement adds recreation, storage and utility space. Outside, is true summer retreat: a fully fenced, level yard featuring an expansive deck, pergola, bar & a separately fenced 30,000-gallon heated concrete/gunite pool. Add'l highlights include a 2-car garage, 2-zone HVAC (2018), new water heater (2024), complete new roof and skylights (2026), updated windows and extensive custom trim. Ideally located near Deerfield School, a 2024 National Blue Ribbon School and hub for many community activities, with convenient access to Rt 22 NYC buses and nearby Summit & Westfield train stations.

356 Longview Dr, Mountainside Boro

Listing Courtesy Of KELLER WILLIAMS REALTY, Contact: 908-416-6364

$825,000

3 Beds ⋅ 2 Baths

Welcome to this beautifully maintained 3-bedroom, 2-bath ranch home offering approximately 1,934 square feet of comfortable one-level living. The bright, inviting interior features generously sized rooms and a functional layout designed for easy everyday living and entertaining. The main level includes a spacious living room, formal dining room, well-appointed kitchen, comfortable bedrooms and flexible living spaces, all without the need to navigate multiple floors. Set on a level .30-acre property, the home also offers a sunroom, patio, expansive backyard, underground sprinklers, a two-car garage and ample driveway parking. The partially finished lower level includes a large laundry room, utility room, plenty of storage and offers potential for even more living space.. Mountainside is known for its strong sense of community with recreation, senior, youth and resident programs offered throughout the year. Deerfield School (grades 3-8) was recognized as a 2024 National Blue Ribbon School. Conveniently located near multiple NYC bus and rail commuting options, major highways, shopping, parks and the Watchung Reservation, this home combines comfort, convenience and an exceptional community setting.

217 Robin Hood Rd, Mountainside Boro

Listing Courtesy Of KELLER WILLIAMS REALTY, Contact: 908-416-6364

$1,195,000

3 Beds ⋅ 3 Baths

Beautiful private neighborhood, all newer high end & stylish updates, desirable ranch living & resort inspired back yard- Welcome home! Main level features: inviting spacious formal living room w/ gas fireplace & large bay window, continuing into the beautiful formal dining room. Newer eat-in kitchen w/ brand new LG stainless steel appliances, custom back splash & ample cabinets. The lovely primary bedroom features an impressive custom built-in cabinet, while the recently renovated en-suite bath showcases beautiful tile work & elegant brushed gold finishes. Completing this level are 2 additional bedrooms & a spacious, newly renovated full bath including designer vanity & marble countertop. The completely updated lower level provides flexible living space w/ large rec room, storage, full bath & laundry rm w/ refrigerator & wine fridge. Additional attributes: 2 car garage, Smart home, abundance of natural sunlight, recessed lighting, custom closets, hardwood floors throughout, spacious attic & ample closet space. Enjoy your own private backyard retreat: fully renovated heated saltwater pool w/ an integrated spa, beautiful paver patio & bonus sitting area that provides the perfect space for outdoor dining & level yard for all your outdoor entertaining. Desirably located in the Sherwood Forest neighborhood w/ minutes to downtowns w/ top restaurants & shopping, top rated schools, medical centers, Golf Clubs Nature preserve, & several NYC transit options. Perfection at its best!

1625 Nottingham Way, Mountainside Boro

Listing Courtesy Of COLDWELL BANKER REALTY, Contact: 862-400-2933

$1,650,000

4 Beds ⋅ 3.1 Baths

Distinctive 2003 Colonial with striking brick curb appeal, beautifully framed by mature landscaping and set on a private, resort-like property. The main level features hardwood floors, a spacious office/den, an elegant formal dining room, powder room, expansive eat-in kitchen and a light-filled family room with fireplace, all with surround sound speakers and overlooking the backyard. Upstairs, four bedrooms and two full baths include an impressive primary suite with a second fireplace, generous bath, walk-in closets and a separate sitting room offering flexible space for a home office or quiet retreat. The finished walk-out lower level adds exceptional versatility with a recreation room, full summer kitchen, full bath and abundant storage. Outdoor living is a true highlight, with an in-ground pool (2025 pool pump and liner), patio, pergola, pizza oven and storage shed surrounded by lush, established plantings. Additional features include a two-car garage, partial home generator, and full-property sprinkler system. Located within a level walk of 2023 National Blue Ribbon-designated Deerfield School (grades 3-8) and convenient to NYC bus service, Route 22, I-78, shopping, dining and neighboring Summit, Westfield and Berkeley Heights. Enjoy the warmth of Mountainside's small-town community with exceptional access to surrounding towns and major commuting routes.

1003 Charles St, Mountainside Boro

Listing Courtesy Of KELLER WILLIAMS REALTY, Contact: 908-416-6364

$1,825,000

5 Beds ⋅ 3.1 Baths

Exceptional custom-built 2015 Colonial in desirable Mountainside, NJ, set on a generous 0.4-acre lot with a finished walk-out lower level, flexible guest space, and a beautifully designed multi-level backyard. A two-story foyer welcomes you in, with custom wainscoting and thoughtful details throughout. The expansive chef's kitchen features an oversized granite island, custom cabinetry, pantry, and seamless flow into the family room with a gas fireplace. A formal dining room with coffered ceilings and a private living room, currently used as a home office, complete the first floor. The backyard offers distinct areas for dining, entertaining, relaxing, and play, including a Trex deck, patio, fully fenced yard, and expansive lawn. Upstairs, the luxurious primary suite features a spa-inspired bath and generous walk-in closet, alongside spacious secondary bedrooms & the convenience of second-floor laundry. High ceilings, quality craftsmanship, and abundant natural light create a warm, welcoming atmosphere throughout. The newly completed 1,000 sq/ft walk-out lower level offers incredible flexibility w/ a private entrance, 9-foot ceilings, rec room, custom wet bar, full bath, guest bedroom, perfect for guest quarters, a private suite, or added living flexibility. Ideally located near Deerfield School, parks, shopping, downtown Westfield, and with a convenient under-1-hour commute to NYC, this home offers the perfect balance of suburban tranquility and commuter convenience.

1233 Poplar Ave, Mountainside Boro

Listing Courtesy Of CORCORAN SAWYER SMITH, Contact: 201-653-8000

$799,999

4 Beds ⋅ 2.1 Baths

SET IN ONE OF MOUNTAINSIDE'S MOST DESIRABLE NEIGHBORHOODS, THIS SPACIOUS 4-BEDROOM, 2.5-BATH COLONIAL PRESENTS A WONDERFUL OPPORTUNITY TO RENOVATE THE EXISTING HOME OR BUILD YOUR DREAM HOME. The first floor offers a welcoming living room, formal dining room, eat-in kitchen, comfortable den, first-floor laundry room, and powder room. Upstairs features four generously sized bedrooms, including a primary suite with a private bath, plus an additional full bath. An unfinished basement provides abundant storage, while the attached two-car garage adds everyday convenience. Hardwood floors beneath the existing carpeting, offering an excellent opportunity to restore their original beauty. Ideally located near parks, shopping, dining, major highways, and NJ Transit bus and rail service for an easy commute, this home offers easy access to everything Mountainside has to offer, including nearby Watchung Reservation and Echo Lake Park. Enjoy highly rated schools and all the benefits of living in one of Union County's most sought-after communities. HOME IS BEING SOLD STRICTLY AS IS. SELLER WILL MAKE NO REPAIRS OR CREDITS. HOME INSPECTIONS ARE FOR INFORMATIONAL PURPOSES ONLY. ****HIGHEST AND BEST OFFERS DUE TUESDAY, JULY 21 AT 6PM****.

378 FOREST HILL WAY, Mountainside Boro

Listing Courtesy Of WEICHERT REALTORS, Contact: 908-251-1611

$749,900

3 Beds ⋅ 3 Baths

Lovingly owned for over three decades, this well-maintained home is being offered for sale for the first time since the current owners raised their family here. Located in one of Mountainside's most desirable neighborhoods, it offers space, functionality, and lasting pride of ownership. The main level features 3 bedrooms and 2 full bathrooms, including a primary suite with a private bath, plus a comfortable living room, dining area, and kitchen. The finished basement adds valuable living space with a full bathroom and direct interior access to the oversized attached 2-car garage, ideal for recreation, guests, hobbies, or a home office. Enjoy outdoor living on the large rear deck overlooking a spacious backyard with fenced areas for pets, a protected garden section, and additional yard space beyond the existing fence. Additional features include central air conditioning, public water and sewer, propane heat, a large driveway with ample parking, and included washer and dryer. Vacant and ready for immediate occupancy, this home offers an exceptional opportunity to update and make it your own while benefiting from years of careful maintenance. Conveniently located near shopping, dining, major roadways, parks, and highly regarded Mountainside schools, this property combines everyday convenience with the charm and quality of one of Union County's most sought-after communities.

1542 Us Highway 22, Mountainside Boro

Listing Courtesy Of EXP REALTY, LLC, Contact: 973-250-9974

$1,250,000

4 Beds ⋅ 3.1 Baths

Completely reimagined from the inside out, this exceptional luxury ranch offers sophisticated one-level living on a beautiful private property. A true full-gut renovation transformed virtually every major component, blending the quality and feel of new construction with the charm of an established neighborhood. The open-concept floor plan is highlighted by soaring ceilings, abundant natural light, hardwood floors, designer lighting, and exquisite custom finishes throughout. The stunning chef's kitchen features custom cabinetry, premium countertops, high-end appliances, an oversized center island, and opens seamlessly to expansive living and dining spaces, as well as a spectacular vaulted family room overlooking the private grounds. Three beautifully renovated full baths, custom walk-in closets, updated windows, doors, trim, insulation, drywall, HVAC, plumbing, electrical, water heaters, and a whole-house Generac generator provide exceptional peace of mind. The finished lower level offers outstanding flexibility with a kitchenette, bedroom, full bath, and generous recreation space. Complete with a two-car garage, professionally landscaped grounds, paver hardscaping, and meticulous attention to detail, this truly turnkey home is ready to enjoy.

1459 Dunn Pkwy, Mountainside Boro

Listing Courtesy Of KL SOTHEBY'S INT'L. REALTY, Contact: 862-812-0634

$635,000

3 Beds ⋅ 1 Baths

For years, I've been more than four walls and a roof, I've been a gathering place where laughter echoed through the rooms, holidays were celebrated, and ordinary days became cherished memories. Come inside and let me show you around! My enclosed front porch, wrapped in windows and filled with natural sunlight, welcomes every season beautifully. Step into my inviting living room, where a gas fireplace creates a warm atmosphere. Just beyond, you'll find a dining room made for sharing meals and conversations, leading into my eat-in kitchen, where morning coffee, game nights, and everyday meals became the moments that mattered most. Off the dining room, a covered deck overlooks my backyard, where cardinals are frequent visitors & birdsong fills the air. Upstairs, I offer three comfortable bedrooms and a full bath, along with generous hallway closet space to keep life organized. Downstairs, my finished recreation room provides additional living space for movies, hobbies, or play, while the laundry room and utility workshop add practicality, flexibility, and convenience. My driveway accommodates 3-4 vehicles, and my location places you near major highways, commuting routes, Echo Lake Park, and the shops and restaurants of downtown Mountainside. Life here is about enjoying the simple pleasures, a morning walk through the park, neighbors who become friends, and the convenience of having everything you need nearby. I'm ready for my next chapter. Perhaps it begins with you. Welcome!

587 Woodland Ave, Mountainside Boro

Listing Courtesy Of COLDWELL BANKER REALTY, Contact: 732-801-0692

$1,799,999

5 Beds ⋅ 5 Baths

Stunning Luxury Estate I Exceptional Design & Prime Location: 5-bed, 5-bath residence w/ a dedicated office offers approx. 5,000 sq ft. of refined living space. Perfectly positioned on a private, semi-wooded lot at the base of the Watchung Mountains, this home delivers an ideal balance of luxury, privacy + everyday convenience just minutes from top dining, parks, scenic bike trails, & public transportation to NYC. Designed w/ timeless elegance, the home showcases crown molding, rich wood flooring, + a classic, highly desirable floor plan. The main level features an office w/ a closet ideal as a 6th bedroom alongside a formal living or dining room that includes a gas fireplace. The custom chef's kitchen is outfitted w/ dual sinks, premium stainless-steel appliances w/ a seamless flow into an expansive great room. The great room includes a built-in bar, gas fireplace, & full bath. The wooded backyard is equipped w/ a concrete patio, stone fireplace, & a fully equipped outdoor kitchen. The luxurious primary suite offers vaulted ceilings, a private balcony, dual walk-in closets + a spa-inspired bathroom w/ a soaking tub, double vanities, & an oversized walk-in shower. A 2nd bedroom includes its own en-suite bath & walk-in closet, while the 3rd & 4th bedrooms share a Jack-and-Jill bath w/ double sinks. There is a full laundry room w/ a utility sink. The fully finished, open-concept tiled basement is complete w/ 5th bed & full bath. Near ALL major highways: Rt 202, 24, & GS Pkwy

301 Garrett Rd, Mountainside Boro

Listing Courtesy Of EXP REALTY, LLC, Contact: 866-201-6210

$675,000

3 Beds ⋅ 1.1 Baths

Welcome to this 3-bed, 2-bath colonial on a sunny corner lot, complete with mature trees, bright patches, and just enough yard to look impressive. It's outdoor space you can actually enjoy instead of maintain! Inside, tall ceilings, hardwood floors, and original chestnut trim bring the charm, while high-speed gigabit ethernet keeps everything running smoothly. The finished walk-up attic adds bonus space for guests, hobbies, or whatever project you swear you'll start soon. The dry basement stays warm in winter and cool in summer reliability at its finest. Deerfield School is an easy walk, and the Governor Livingston High School bus stop is right across the street, making mornings easier for all. Commuters and hybrid workers will appreciate nearby NJ Transit routes 65/66, 114, and 117, with westbound service 0.5 miles away and eastbound under a mile. You get suburban breathing room while still keeping NYC within reach. You're steps from sidewalks leading to playgrounds, ballfields, and Mountainside's Borough events including 4th of July fireworks you can watch from your own yard. A quick drive brings you to the Watchung Reservation's trails and stables, plus Echo Lake Park's dog park, paddleboats, and legendary sledding hill. The detached 2-car garage offers parking or workshop potential. Recent updates include a newer tear-off roof, washer, dryer, and front stairs. Downtown Mountainside is just 1.5 miles away.

291 Central Ave, Mountainside Boro

Listing Courtesy Of COLDWELL BANKER REALTY, Contact: 908-334-4586

$980,000

3 Beds ⋅ 3.1 Baths

Exceptional custom ranch showcasing quality craftsmanship, distinctive design and beautifully maintained indoor & outdoor living spaces. A welcoming foyer with skylight opens to a sun-filled living room with gas fireplace, high ceilings and French doors leading to an expansive deck. An open loft overlooking the living area adds flexibility and architectural character. Designed for comfortable one-floor living, the main level features a primary suite with deck access, cedar walk-in closet and private bath with skylight. Two additional bedrooms, full bath, powder room and first-floor laundry complete the layout. The custom gourmet kitchen features corian countertops & backsplash, handmade cherry wood cabinetry, heated bamboo floors, Wolf range, dual Sub-Zero refrigerators with 4 freezer drawers, built-in Miele coffee system & steamer, dishwasher, trash compactor, instant hot water dispenser and a unique built-in fish tank. Large windows fill the home with natural light and showcase the professionally landscaped grounds. The finished lower level offers a spacious recreation room, exercise room, sauna and full bath. Enjoy an expansive deck, patio and tranquil pond with waterfall. Additional features include multi-zone HVAC, oversized two-car garage, generator, underground sprinkler system, water softener, newer roof, new gutters with maintenance-free gutter guards and newer furnace. Conveniently located near shopping, parks, golf courses, the Short Hills Mall, easy NYC commute.

486 Summit Rd, Mountainside Boro

Listing Courtesy Of REAL, Contact: 908-918-5023

Start Your Search

board logo The data relating to the real estate for sale on this web site comes in part from the Internet Data Exchange Program of the NJMLS. Real estate listings held by brokerage firms other than Century 21 AG Realty Group are marked with the Internet Data Exchange logo and information about them includes the name of the listing brokers. Some properties listed with the participating brokers do not appear on this website at the request of the seller. Listings of brokers that do not participate in Internet Data Exchange do not appear on this website. All information deemed reliable but not guaranteed. Last date updated: . Source: New Jersey Multiple Listing Service, Inc. “2026 New Jersey Multiple Listing Service, Inc. All rights reserved.”