Mountainside Boro Real Estate

Welcome to Mountainside Boro, a charming gem nestled in the heart of Union County, New Jersey. This picturesque borough offers a delightful blend of suburban tranquility and vibrant community spirit, making it an ideal place for families, young professionals, and retirees alike.

Mountainside Boro is renowned for its stunning natural beauty, with the majestic Watchung Mountains serving as a breathtaking backdrop. The area is rich in outdoor recreational opportunities, including hiking trails, parks, and scenic viewpoints that provide a perfect escape into nature. The nearby Echo Lake Park and the Watchung Reservation offer residents ample space for picnicking, jogging, and enjoying the great outdoors.

In addition to its natural allure, Mountainside boasts a strong sense of community. The borough is home to top-rated schools, ensuring that families have access to quality education. Local events and festivals throughout the year foster neighborly connections and create lasting memories. Whether it’s the annual holiday tree lighting or summer movie nights in the park, there’s always something happening to bring residents together.

For those who appreciate convenience, Mountainside is ideally located with easy access to major highways and public transportation, making commutes to nearby urban centers like Newark and New York City a breeze. With a variety of local shops, restaurants, and services, residents enjoy a small-town feel while having everything they need right at their fingertips.

In Mountainside Boro, you’ll find not just a place to live, but a place to thrive. Embrace the charm and community spirit of this remarkable borough, where every day feels like home.

Newest Listings in Mountainside Boro

$1,199,000

4 Beds ⋅ 2.1 Baths ⋅ 4052069 MLS

Nestled in the heart of Mountainside, this beautifully updated 4-bedroom, 2.5-bath classic Colonial with Hardie Board siding radiates timeless charm while offering the perfect balance of small-town close knit community living and everyday convenience, minutes from Summit and Westfield, with easy access to the direct bus to Manhattan, local library, community pool, & the Watchung Reservation/trails & Watchung Stables, The main level is thoughtfully designed for both daily living & entertaining, with newly renovated white kitchen open to mudroom and laundry area, French sliders lead to large new paver patio overlooking the beautifully private landscaped property, ,ringed by mature trees , grill area & grill gazebo, this backyard oasis is ideal for relaxed evenings or gatherings. 2nd level Boosts large primary ensuite w/vaulted ceiling, 3 add bedrooms & main bath. The full basement offers a spacious recreation room,workroom, playroom & storage. Thoughtful updates completed in recent years make this home truly move-in ready. Highlights include a repaved driveway, new patio & improved drainage, a new garage door system, dedicated EV charging outlet, a renovated basement, refreshed upstairs bathrooms, a custom mudroom w/built-ins, smart switches and updated lighting, a new upstairs AC unit, enhanced landscaping & privacy plantings, front irrigation, a sensor kitchen faucet, fresh interior paint. The fireplace has also been converted to gas, Generator Hook-Up This home is a gem!

1349 Birch Hill Rd, Mountainside Boro

$959,000

2 Beds ⋅ 3 Baths ⋅ 4051918 MLS

Discover this spacious 2-bedroom, 3-bathroom home with 2,378 sq ft on the main floor plus approximately 1,000 sq ft of finished basement space. The home features a renovated kitchen with granite countertops, updated cabinets, appliances, and tile flooring. A full-length attic offers exciting potential for additional bedrooms and a bathroom. The roof is approximately 10 years old, while the HVAC and water heater are less than 5 years old. Property sold AS-IS

456 Bayberry Ln, Mountainside Boro

$749,999

3 Beds ⋅ 1.1 Baths ⋅ 4050231 MLS

Welcome to 271 Summit Road, a 3 Bedroom, 1.5-Bath ranch set on a corner lot in Mountainside. The single-level layout offers easy, efficient living with Eat in Kitchen, Livingroom, Dining room, Enclosed Porch, Three Bedrooms and Bathroom. The unfinished basement with a 1/2 Bathroom is a blank canvas full of potential for a future rec room, home gym, office, or extra storage, giving the next owner room to make this home their own. Located in Mountainside, residents enjoy easy access to major highways and shopping

271 Summit Rd, Mountainside Boro

$3,600,000

4 Beds ⋅ 3.1 Baths ⋅ 4049756 MLS

Exceptional custom Tudor by architect Hildie Lazar and builder Tom Colicchio (Oct 2020 - Jan 2022) on 1.02 acres at the end of a quiet, private dead-end road. Nearly 4,500 sq ft on three levels:4 bedrooms, 3.5 baths. First floor (2,356 sq ft) designed for aging in place, no steps or level changes. Stone arched entry & open porch lead to a vaulted foyer/dining room & sun-filled living space. Gourmet kitchen w/ top-line appliances, Edgecomb gray cabinetry, & a large quartzite island. Living room w/ built-in bar (wine & beverage refrigerators), remote gas fireplace & built-in bookshelves. 280 sq ft English glass conservatory with remote blinds & backyard access. Mudroom/laundry w/ counters, sink, & custom storage; two-car garage w/underfloor heat & EV charging. First-floor primary suite: vaulted ceilings, patio access, second gas fireplace, spa bath with skylights, rain shower, soaking tub, and marble double vanity. Two walk-in closets connect by secret door to an office w/vaulted ceiling, third gas fireplace, & blue-gray cabinetry. Underfloor heat throughout. Second floor (1,077 sq ft): three bedrooms including a custom bunk room that sleeps 5, reading nook, and two full baths. Finished basement (1,033 sq ft): gym, billiard room, & climate-controlled wine cellar (200 bottles, glass lockable doors). Whole house gas generator. All-native woodland garden w/ 120+ species on winding paths. Wild lawn & remote gas fire pit off patio. 120 sq ft outbuilding could serve as a studio

151 Wild Hedge Ln, Mountainside Boro

$1,650,000

5 Beds ⋅ 3.1 Baths ⋅ 4049132 MLS

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

$3,600

4046670 MLS

pacious and freshly updated combined office space at 917 Mountain Avenue in Mountainside. Located in a building constructed in 1985, Suites 1 and 2 offer approximately 2,328 square feet with six private offices, two conference and reception areas, a kitchenette, lobby, two private bathrooms, storage and new flooring throughout. The flexible layout is ideal for a variety of professional uses and includes ample onsite parking. Conveniently located with easy access to major highways, nearby businesses and surrounding communities.Room dimensions include:Office 1, 10'8" x 14'11"Office 2, 10'8" x 8'11"Office 3, 12'1" x 14'1"Office 4, 9'5" x 10'2"Office 5, 11'4" x 21'0"Office 6, 11'4" x 17'4"Conference and reception area 1, 9'10" x 28'2"Conference and reception area 2, 15'5" x 13'3"Kitchenette, 8'8" x 15'3"Lobby, 15'11" x 6'7"Storage closet, 15'11" x 6'2"

917 Mountain Avenue, Mountainside Boro

$1,680

4046660 MLS

Bright and freshly updated Suite 2 office space at 917 Mountain Avenue in Mountainside. Located in a building constructed in 1985, this approximately 1,339 square foot suite features two spacious private offices, a conference and reception room, kitchenette, lobby, foyer, new flooring, a private bathroom and ample onsite parking. The flexible layout is ideal for a variety of professional uses, with convenient access to major highways, nearby businesses and surrounding communities. Office 1, 11'3" x 17'2", Office 2, 11'3" x 21'2", Conference and reception room, 15'3" x 12'11", Kitchenette, 8'10" x 15'0",Foyer, 15'11" x 6'4"

917 Mountain Avenue, Suite 2, Mountainside Boro

$1,725

4046649 MLS

Bright and freshly updated Suite 1 office space at 917 Mountain Avenue in Mountainside. This approximately 1,185 square foot suite features four private offices, a spacious reception and work area, new flooring, a private bathroom and ample onsite parking. The flexible layout is well suited for a variety of professional uses. Conveniently located with easy access to major highways, nearby businesses and surrounding communities.Room dimensions include: Office 1, 12'0" x 13'10", Office 2, 9'6" x 10'1", Office 3, 10'6" x 9'3", Office 4, 10'6" x 14'7", Reception and work area, 15'0" x 27'10"

917 Mountain Avenue, Suite 1, Mountainside Boro

$999,000

5 Beds ⋅ 2.1 Baths ⋅ 4046556 MLS

Welcome to this spacious 5-bedroom, 2.5-bath home situated on an almost half acre in desirable Mountainside. Offering an abundance of living space, this residence features generously sized rooms, hardwood floors, two fireplaces, and a finished basement providing additional living and recreation space. The main level offers a comfortable layout with formal living and dining areas and a spacious family room. Outside, enjoy a private backyard with an in-ground pool and deck, ideal for summer entertaining and relaxing. Additional features include a two-car attached garage, circular driveway, central air, and ample storage. Conveniently located near shopping, dining, parks, major highways, and transportation. An excellent opportunity to update and personalize a spacious home in a sought-after Mountainside neighborhood.

472 Summit Rd, Mountainside Boro

$1,249,000

5 Beds ⋅ 4 Baths ⋅ 4044999 MLS

Completely reimagined in 2026, this Colonial commands attention on a corner lot with its crisp modern facade and stone accents that set the tone from the moment you arrive. The main level flows effortlessly from the formal living room through the dining room and into a chef's kitchen anchored by an oversized center island that opens directly to the family room for one expansive gathering space as suited to a quiet weeknight as it is to entertaining on a grand scale. A dinette, main-level bedroom, and full bathroom round out the first floor, offering flexibility for residents and guests alike. Upstairs, the primary suite serves as a tranquil retreat with an en suite bathroom, double vanity, and a WIC outfitted with a custom organizer, while three additional bedrooms share a common bathroom. A dedicated laundry room on this level adds everyday convenience. The finished lower level extends the footprint with a family room, playroom, and full bathroom ready to serve as a home theater, gym, or recreation space (these are merely ideas, the opportunity is endless). Head outside to a private fenced backyard with an in-ground pool and expansive paver patio, framed by mature landscaping. Just off Route 22 with local bus transportation a block away, this home delivers effortless access to everything you need.

209 Central Ave, Mountainside Boro

$979,000

4 Beds ⋅ 2.1 Baths ⋅ 4043673 MLS

Location & Space! 4BRM,2.5BA home located in a sought-after Mountainside quiet neighborhood/spread out upper Central Ave. Leveled big private yard where you can watch the town fireworks. Sunlight-filled rooms, open concept design for today's lifestyle, and gleaming hardwood floors throughout! Inside, you'll find an impressive Living room with a large picture window; the dining room opens to a stylish, updated kitchen w/quartz countertops, center island, abundant cabinetry, S/S appliances, pantry, and access to deck, patio, and a large private wooded backyard. Upstairs offers three BRM/2 baths, incl. a comfortable primary suite with an en-suite bath & WIC. Ground level features a home/office, a powder room, & a large Family room w/views of the deck, backyard, and Balcony. The lower level has an unfinished basement w/high ceilings, perfect for storage today and future potential tomorrow. Recent improvements include a lawn sprinkler system, a reflective natural sunlight device in the kitchen & second-floor hallway, and new HVAC in October 2024. Just minutes from top schools, house worship, shopping, restaurants, parks, major highways, Express bus to Midtown NYC & nearby NJ Transit stations to NYC. Close to Watchung Reservation's scenic trails & local horseback riding. Enjoy the great flow and layout of this home for everyday living and entertaining both indoors and outdoors with location and Nature!

340 Central Ave, Mountainside Boro

$1,275,000

4 Beds ⋅ 3 Baths ⋅ 4042369 MLS

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

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