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12139 Mt Vernon Ave
Grand Terrace, CA 92313

$401 - $2,352 USD/MO

Medical For Lease  •  150+ SF

Property Details

  • Property Type Medical
  • Year Built 1971
  • Total Building Size 12,272 SF
  • Tenancy Multiple
  • Building Class C
  • Zoning BRSP-VC
30 Transit Score
50 Walk Score

2 Spaces Available

Name Space Use Size Rent Details
1st Floor Ste 110 Medical Office 1,568 SF $18.00 USD/SF/YR
Large, first-floor corner suite with disabled ramp access and ample parking in the shady east wing boasts private entrances, 24-hr access, private restrooms x2, dedicated thermostat/HVAC, a large reception and waiting area, private offices, kitchen, washer/dryer hookups, locking file room, wifi ready, LED lighting, modern laminate flooring, and plenty of flexible open space to fit to your needs. Awning above main entrance can be customized to your business and monument sign space on Mt Vernon Avenue is available to maximize visibility. Past tenants include a large insurance firm, a physical therapist, mental healthcare practice, and other healthcare professionals.

  • Date available: Now
  • Lease term: Negotiable
  • Service type: Modified Gross
  • Space Type: Relet
2nd Floor Ste 205 Office 150 SF $32.04 USD/SF/YR
Small, second-floor private office space is perfect for start-up, online, or small businesses. Sound-proofed for podcasting, mental health services or other businesses requiring privacy and confidentiality. Renovated in 2025 with modern, laminate flooring. Unit has large picture windows and LED lighting, secure deadbolt, central HVAC, 24-hr access, mailbox, and near restrooms. Ample parking, high-speed wifi ready (not included in base rent), and monument signage available to increase visibility. Competitive rental rates. All tenants required to apply and be approved for a business license from the City of Grand Terrace and must carry a Commercial General liability insurance policy at all times during tenancy.

  • Date available: Now
  • Lease term: Negotiable
  • Service type: Modified Gross
  • Space Type: Relet

Description

The Keeney Professional Building is a family-owned and managed two-story, Mediterranean-style, commercial property situated next to beautiful Blue Mountain in the small community of Grand Terrace, San Bernardino County, California near the I-215, I-10 and 91 freeways. We offer 15 units of flexible commercial space for office, medical (some units), and other commercial use, varying in size from 150 - 1,568 square feet (or more with the lease of contiguous units) in a thriving business district on the corner of Mt Vernon Ave and Barton Rd. Our building, built in 1971 by the same family who still owns and manages it today, offers competitive rental and CAM rates, central AC and heating, large picture windows, 24-hour secure access, secure mailboxes, ample parking, multiple code-locked restrooms on each floor, high speed Internet (not included in base rent), a monument sign to increase the visibility of your business, responsive Facilities Management, and a personal management style. Some units have private restrooms, built-ins, locking file rooms, sinks, and/or can be partially built to suit. Our units are all recently remodeled with fresh paint and hard flooring in modern colors. We are always working to improve our property with the most recent project being a landscaping renovation to xeriscape a large portion of the property and upcoming plans to repaint the exterior of the building and resurface/restripe our parking lot. New businesses are welcome. All tenants required to apply for and be approved for a business license from the City of Grand Terrace and carry a Commercial General liability insurance policy at all times during tenancy. Call today to arrange a viewing appointment and come see what we can offer you and your business!

Amenities

  • 24 Hour Access
  • Signage
  • Central Heating
  • Fully Carpeted
  • Natural Light
  • Drop Ceiling
  • Wi-Fi
  • Monument Signage
  • Air Conditioning

Major Tenants

Tenant SF Occupied Lease End Date
Arkadie Wellness
BDIPS
Breaking Cycles Counseling
David McCoy 3/2/2027
David Nhep Tattoo Studio
Flotrice Studios
Grand Terrace Chiropractic/Bissani Integrated Heal
Radiant Therapy, Landon Ehteshamzadeh
Relief Spot
Tiffany's Lash Studio 2/28/2027

Public Transportation

Commuter RailDriveWalkDistance
8 min - 4.1 mi
9 min - 5.2 mi
AirportDriveWalkDistance
Ontario International 28 min - 19.7 mi
John Wayne/Orange County 58 min - 47.8 mi

Parking Details

Parking Available: Yes
Reserved: No
Spaces Provided: 40
Type: Surface
Included in Rent: Yes
Heather Hurst 951-847-0304 Keeney Property Management
Heather Hurst 951-847-0304 Keeney Property Management