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Space Availability (5)

Display Rental Rate as

  • Space
  • Size
  • Term
  • Rental Rate
  • Rent Type
  • 2nd Floor
  • 3,387 SF
  • Negotiable
  • $25.00 /SF/YR $2.08 /SF/MO $84,675 /YR $7,056 /MO
  • Triple Net (NNN)
85 River St - 2nd Floor
Space Use
Office
Availability
Now

Expansive office suite available in Waltham’s well-known Colonial Shopping Center. Featuring a private entrance, the space is currently configured with nine offices, two reception areas, a large conference room, and a kitchen with dining area. All interior walls are non-structural, allowing for flexible reconfiguration to meet your business needs. Benefit from exceptional visibility, high daily traffic, and abundant on-site parking for both employees and guests.

  • Lease rate does not include utilities, property expenses or building services
  • Fits 9 - 28 People
  • 2nd Floor
  • 3,017 SF
  • Negotiable
  • $25.00 /SF/YR $2.08 /SF/MO $75,425 /YR $6,285 /MO
  • Triple Net (NNN)
85 River St - 2nd Floor
Space Use
Retail
Availability
Now

Spacious professional office suite offering ±3,017 SF with a dedicated waiting room, multiple private offices, large meeting room, pantry, and in-suite restrooms. Well-suited for legal, medical, or professional users seeking a turnkey office environment. Located within a well-established community center with ample parking, strong co-tenancy, and convenient access to major highways and public transit.

  • Lease rate does not include utilities, property expenses or building services
  • 2nd Floor
  • 1,400 SF
  • Negotiable
  • $25.00 /SF/YR $2.08 /SF/MO $35,000 /YR $2,917 /MO
  • Triple Net (NNN)
85 River St - 2nd Floor
Space Use
Retail
Availability
Now

Open floorplan fit for a variety of uses.

  • Lease rate does not include utilities, property expenses or building services
  • 2nd Floor
  • 1,901 SF
  • Negotiable
  • $25.00 /SF/YR $2.08 /SF/MO $47,525 /YR $3,960 /MO
  • Triple Net (NNN)
85 River St - 2nd Floor
Space Use
Office
Availability
Now

Bright and versatile 1,901 SF office suite located on the second floor at 49 River St in Waltham. The flexible layout is ideal for a wide range of professional, creative, or service-based users. Tenants benefit from ample on-site parking, strong co-tenancy, and convenient access to Route 128 and public transportation.

  • Lease rate does not include utilities, property expenses or building services
  • Fits 5 - 16 People
  • 2nd Floor
  • 3,401 SF
  • Negotiable
  • Upon Request Upon Request Upon Request Upon Request
  • Triple Net (NNN)
85 River St - 2nd Floor
Space Use
Office
Availability
Now

Second-floor office suite at 49 River St offering approximately ±3,400 SF, created by combining two adjacent spaces into one seamless layout. Previously operated as a single unit, the adjoining demising wall can be removed (as illustrated) to deliver a fully connected, efficient floor plan.The space features a strong mix of private offices, open work areas, conference space, and support areas, including two restrooms and dedicated storage. Ideal for professional, medical, or service-based users seeking a flexible layout that can accommodate a variety of operational needs.

  • Lease rate does not include utilities, property expenses or building services
  • Fits 9 - 28 People
Space Size Term Rental Rate Rent Type
2nd Floor 3,387 SF Negotiable $25.00 /SF/YR $2.08 /SF/MO $84,675 /YR $7,056 /MO Triple Net (NNN)
2nd Floor 3,017 SF Negotiable $25.00 /SF/YR $2.08 /SF/MO $75,425 /YR $6,285 /MO Triple Net (NNN)
2nd Floor 1,400 SF Negotiable $25.00 /SF/YR $2.08 /SF/MO $35,000 /YR $2,917 /MO Triple Net (NNN)
2nd Floor 1,901 SF Negotiable $25.00 /SF/YR $2.08 /SF/MO $47,525 /YR $3,960 /MO Triple Net (NNN)
2nd Floor 3,401 SF Negotiable Upon Request Upon Request Upon Request Upon Request Triple Net (NNN)

85 River St - 2nd Floor

Size
3,387 SF
Term
Negotiable
Rental Rate
$25.00 /SF/YR $2.08 /SF/MO $84,675 /YR $7,056 /MO
Rent Type
Triple Net (NNN)
Space Use
Office
Availability
Now

Expansive office suite available in Waltham’s well-known Colonial Shopping Center. Featuring a private entrance, the space is currently configured with nine offices, two reception areas, a large conference room, and a kitchen with dining area. All interior walls are non-structural, allowing for flexible reconfiguration to meet your business needs. Benefit from exceptional visibility, high daily traffic, and abundant on-site parking for both employees and guests.

  • Lease rate does not include utilities, property expenses or building services
  • Fits 9 - 28 People

85 River St - 2nd Floor

Size
3,017 SF
Term
Negotiable
Rental Rate
$25.00 /SF/YR $2.08 /SF/MO $75,425 /YR $6,285 /MO
Rent Type
Triple Net (NNN)
Space Use
Retail
Availability
Now

Spacious professional office suite offering ±3,017 SF with a dedicated waiting room, multiple private offices, large meeting room, pantry, and in-suite restrooms. Well-suited for legal, medical, or professional users seeking a turnkey office environment. Located within a well-established community center with ample parking, strong co-tenancy, and convenient access to major highways and public transit.

  • Lease rate does not include utilities, property expenses or building services

85 River St - 2nd Floor

Size
1,400 SF
Term
Negotiable
Rental Rate
$25.00 /SF/YR $2.08 /SF/MO $35,000 /YR $2,917 /MO
Rent Type
Triple Net (NNN)
Space Use
Retail
Availability
Now

Open floorplan fit for a variety of uses.

  • Lease rate does not include utilities, property expenses or building services

85 River St - 2nd Floor

Size
1,901 SF
Term
Negotiable
Rental Rate
$25.00 /SF/YR $2.08 /SF/MO $47,525 /YR $3,960 /MO
Rent Type
Triple Net (NNN)
Space Use
Office
Availability
Now

Bright and versatile 1,901 SF office suite located on the second floor at 49 River St in Waltham. The flexible layout is ideal for a wide range of professional, creative, or service-based users. Tenants benefit from ample on-site parking, strong co-tenancy, and convenient access to Route 128 and public transportation.

  • Lease rate does not include utilities, property expenses or building services
  • Fits 5 - 16 People

85 River St - 2nd Floor

Size
3,401 SF
Term
Negotiable
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Rent Type
Triple Net (NNN)
Space Use
Office
Availability
Now

Second-floor office suite at 49 River St offering approximately ±3,400 SF, created by combining two adjacent spaces into one seamless layout. Previously operated as a single unit, the adjoining demising wall can be removed (as illustrated) to deliver a fully connected, efficient floor plan.The space features a strong mix of private offices, open work areas, conference space, and support areas, including two restrooms and dedicated storage. Ideal for professional, medical, or service-based users seeking a flexible layout that can accommodate a variety of operational needs.

  • Lease rate does not include utilities, property expenses or building services
  • Fits 9 - 28 People

Rent Types


The rent amount and type that the tenant (lessee) will be responsible to pay to the landlord (lessor) throughout the lease term is negotiated prior to both parties signing a lease agreement. The rent type will vary depending upon the services provided. For example, triple net rents are typically lower than full service rents due to additional expenses the tenant is required to pay in addition to the base rent. Contact the listing broker for a full understanding of any associated costs or additional expenses for each rent type.

1. Full Service: A rental rate that includes normal building standard services as provided by the landlord within a base year rental.

2. Double Net (NN): Tenant pays for only two of the building expenses; the landlord and tenant determine the specific expenses prior to signing the lease agreement.

3. Triple Net (NNN): A lease in which the tenant is responsible for all expenses associated with their proportional share of occupancy of the building.

4. Modified Gross: Modified Gross is a general type of lease rate where typically the tenant will be responsible for their proportional share of one or more of the expenses. The landlord will pay the remaining expenses. See the below list of common Modified Gross rental rate structures: 4. Plus All Utilities: A type of Modified Gross Lease where the tenant is responsible for their proportional share of utilities in addition to the rent. 4. Plus Cleaning: A type of Modified Gross Lease where the tenant is responsible for their proportional share of cleaning in addition to the rent. 4. Plus Electric: A type of Modified Gross Lease where the tenant is responsible for their proportional share of the electrical cost in addition to the rent. 4. Plus Electric & Cleaning: A type of Modified Gross Lease where the tenant is responsible for their proportional share of the electrical and cleaning cost in addition to the rent. 4. Plus Utilities and Char: A type of Modified Gross Lease where the tenant is responsible for their proportional share of the utilities and cleaning cost in addition to the rent. 4. Industrial Gross: A type of Modified Gross lease where the tenant pays one or more of the expenses in addition to the rent. The landlord and tenant determine these prior to signing the lease agreement.

5. Tenant Electric: The landlord pays for all services and the tenant is responsible for their usage of lights and electrical outlets in the space they occupy.

6. Negotiable or Upon Request: Used when the leasing contact does not provide the rent or service type.

7. TBD: To be determined; used for buildings for which no rent or service type is known, commonly utilized when the buildings are not yet built.

Select Tenants at Colonial Shopping Center

  • Tenant
  • Description
  • US Locations
  • Reach
  • HearingLife
  • Health Care
  • 927
  • International
  • Middlesex Dental Prosthetics
  • MD/DDS
  • 1
  • Local
  • Newtonville Camera
  • Cameras
  • 1
  • Local
  • Pini's Pizzeria
  • Restaurant
  • 2
  • Local
  • Plaster Fun Time
  • Art/Crafts
  • 1
  • Regional
  • Waltham Dental Cente Tam, Tang, and Sham, P.C.
  • Health Care
  • 1
  • Local
Tenant Description US Locations Reach
HearingLife Health Care 927 International
Middlesex Dental Prosthetics MD/DDS 1 Local
Newtonville Camera Cameras 1 Local
Pini's Pizzeria Restaurant 2 Local
Plaster Fun Time Art/Crafts 1 Regional
Waltham Dental Cente Tam, Tang, and Sham, P.C. Health Care 1 Local

Property Facts

Total Space Available 13,106 SF
Center Type Community Center
Parking 540 Spaces
Center Properties 1
Gross Leasable Area 100,000 SF
Total Land Area 2.85 AC
Year Built 1900

Features and Amenities

  • Signage
Moderately walkable
70/100
Exceptionally drivable
90/100
Limited public transit
30/100
Moderately bikeable
70/100

Nearby Major Retailers

Shaw's
Little Gym
Stop & Shop
Watertown Savings Bank
Tempo
Patel Brothers
Bonchon
Margaritas Mexican Restaurant
Rent-A-Center
Rockland Trust Company
  • Listing ID: 36093124

  • Date on Market: 3/30/2026

  • Last Updated:

  • Address: 85 River St, Waltham, MA 02453

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