Mountainside, NJ Office Spaces for Rent & Lease

$129-$4,866/Mo

(972) 764-8885

NJ, South Plainfield - Hadley Rd

Flexible workspace in NJ, South Plainfield - Hadley Rd

3000 Hadley Rd, Unit 3RD, South Plainfield, NJ 07080

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(972) 764-8885

NJ, East Orange - Central Ave

Workspaces, services and support to help you work better in CA, Santa Rosa - Stony Circle

576 Central Ave, East Orange, NJ 07018

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$23 SF/Yr

1,500 SF

Mountainside Office Space For Rent

1122 US Highway 22, Mountainside, NJ

Office space available in Mountainside with excellent visibility.

Excellent visibility
Numerous local amenities

Updated: Sep 2, 2025

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3,700 SF

Turnkey Office Suite in Mountainside

1139 Spruce Drive, Mountainside, NJ 7092

3,700 SF office suite ideal for medical or professional users.

Turnkey and Move‑in Ready: Immediate occupancy with a fully built‑out 3,700 SF office suite.
Ideal for Medical/Professional Use: Specifically designed layout with 11 private offices, conference room, and open workspace.
Ample On‑Site Parking: Convenient and accessible parking for staff and clients.
Strategic Location: Proximity to Route 22, Summit, and Westfield provides easy access.
Flexible Layout: Includes 11 private offices, a conference room, an open bullpen area, and a storage room.

Updated: Oct 22, 2025

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$1,195/Mo

7,688 SF

Professional Office Suite Available

Two-story office building with suites for lease or investment.

1044 Route 22 West Suite 1, Mountainside, NJ 7092

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2,686 SF

Renovated Office Space Available

Recently renovated office space with modern amenities and convenient access.

200 Sheffield St, Mountainside, NJ

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7,085 SF

Freestanding Building Near Route 78

Freestanding flex, office, and service space with upgraded utilities.

1167 US Hwy 22, Mountainside, NJ

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Office Spaces for Lease in Nearby Cities

Here are 4 Similar Spaces we found in Nearby Locations for your consideration.

$2,500/Mo

11,000 SF

Renovated Office Suite For Rent

Move-in ready office suite with flexible furnishing options.

11 Dundar Rd, Springfield, NJ 7081

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$895/Mo

Professional Office Space For Rent

Professional office space available on Westfield's Doctors Row.

131 S Euclid Ave, Westfield, NJ 7090

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4,152 SF

Class A Office Space Available

Class A office space for lease in Union County, NJ.

899 Mountain Ave, Springfield, NJ

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$1,050/Mo

1,080 SF

Renovated Office Space with Amenities

Newly renovated office space with shared amenities and parking included.

560 Springfield Ave, Westfield, NJ 7090

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Similar Spaces for Sale in Mountainside, NJ

Consider Similar Space for Sale. We found 4 Spaces matching your search parameters.

$1,750,000

5,580 SF

Mountainside Office Building For Sale

5580 SF office building in Mountainside, NJ for sale.

1299 US Route 22 Highway E, Mountainside, NJ 07092

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$1,950,000

7,085 SF

Mountainside Flex Property on Route 22

Versatile 7,085 SF commercial/flex property on 0.72 acres.

1167 Us Highway 22, Mountainside, NJ 7092

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Mountainside Commercial Flex-Zoned Property

$1,950,000

7,148 SF

Mountainside Commercial Flex-Zoned Property

Two-story commercial property with warehouse and office space for sale.

1167 ROUTE 22, Mountainside, NJ 7092

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Industrial Warehouse/Office Property For Sale

Contact for pricing

7,085 SF

Industrial Warehouse/Office Property For Sale

7,085 SF industrial warehouse/office property on 0.696 acres.

1167 US-22, Mountainside, NJ 7092

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Potential Development Sites for Consideration

Can't find the perfect fit? These Land listings present an alternative path: the potential to develop a property for your specific goals.

Important: These AI-suggestions are a starting point, not a guarantee of permitted use. All zoning, permitting, and land use information must be independently verified by you with the appropriate local authorities before making any commitments.

$2,300/Mo

Commercial Land in Summit City

Commercial land available for rent in Summit City, New Jersey.

789 Springfield Ave, Summit, NJ 07901

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$3,000/Mo

Customizable Commercial Space for Lease

Flexible commercial space suitable for various business types.

1228 Springfield Ave, Irvington, NJ 7111

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$1,000/Mo

Commercial Land in High-Traffic Area

0.18 acre vacant lot with high visibility and traffic.

586 Montauk Highway, Shirley, NY 11967

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$1,500/Mo

Corner Lot on Busy Road

High-visibility commercial land for lease on a busy road.

574 Montauk Highway, Shirley, NY 11967

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Mountainside, NJ Office Spaces Leasing Opportunities Market Analysis

Explore Office Spaces leasing options in Mountainside, NJ with 7 listings featured on our commercial real estate exchange. The current inventory includes 9,188 square feet of properties with an estimated lease value of $25 SF/Yr.

Estimated lease rates for Office Spaces in Mountainside, NJ begin at $1.87 SF/Yr, with an average of $12 SF/Yr and extend to $23 SF/Yr.