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All Available Spaces(2)

Display Rental Rate as

  • Space
  • Size
  • Term
  • Rental Rate
  • Space Use
  • Build-Out
  • Available
  • 1st Floor, Ste 110
  • 1,568 SF
  • Negotiable
  • $18.00 /SF/YR $1.50 /SF/MO $28,224 /YR $2,352 /MO
  • Office/Medical
  • Spec Suite
  • Now

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.

  • Listed rate may not include certain utilities, building services and property expenses
  • 1 Conference Room
  • Reception Area
  • Private Restrooms
  • Print/Copy Room
  • Closed Circuit Television Monitoring (CCTV)
  • Drop Ceilings
  • Recessed Lighting
  • After Hours HVAC Available
  • Open-Plan
  • Smoke Detector
  • Great Location on corner of Mt Vernon & Barton
  • CCTV Security Camera Sys. & High Speed Wifi Ready
  • Locking File Storage & Lg Reception/Waiting area
  • 3 Private Offices
  • Finished Ceilings: 8’2”
  • Central Air and Heating
  • Wi-Fi Connectivity
  • Security System
  • Corner Space
  • Secure Storage
  • Natural Light
  • DDA Compliant
  • Hardwood Floors
  • Wheelchair Accessible
  • Lg Corner unit w/ADA ramp & ample Parking
  • Kitchen with W/D hookups + 2 Private Restrooms
  • 24-Hr Building Access & HVAC
  • 2nd Floor, Ste 205
  • 150 SF
  • Negotiable
  • $32.04 /SF/YR $2.67 /SF/MO $4,806 /YR $400.50 /MO
  • Office
  • Full Build-Out
  • Now

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.

  • Listed rate may not include certain utilities, building services and property expenses
  • 1 Private Office
  • Finished Ceilings: 8’2”
  • Wi-Fi Connectivity
  • Drop Ceilings
  • Natural Light
  • Open-Plan
  • Smoke Detector
  • Quiet location with Sound-proofing for privacy
  • Secure Building w/Code Locked Entrance & CCTV
  • Lg Picture Window and LED Lighting
  • Mostly Open Floor Plan Layout
  • 1 Workstation
  • Central Air and Heating
  • Closed Circuit Television Monitoring (CCTV)
  • Recessed Lighting
  • After Hours HVAC Available
  • Hardwood Floors
  • Low, Competitive Rent great for a Start Up
  • Central HVAC w/24-hr Access
  • Modern Laminate Flooring
Space Size Term Rental Rate Space Use Build-Out Available
1st Floor, Ste 110 1,568 SF Negotiable $18.00 /SF/YR $1.50 /SF/MO $28,224 /YR $2,352 /MO Office/Medical Spec Suite Now
2nd Floor, Ste 205 150 SF Negotiable $32.04 /SF/YR $2.67 /SF/MO $4,806 /YR $400.50 /MO Office Full Build-Out Now

1st Floor, Ste 110

Size
1,568 SF
Term
Negotiable
Rental Rate
$18.00 /SF/YR $1.50 /SF/MO $28,224 /YR $2,352 /MO
Space Use
Office/Medical
Build-Out
Spec Suite
Available
Now

2nd Floor, Ste 205

Size
150 SF
Term
Negotiable
Rental Rate
$32.04 /SF/YR $2.67 /SF/MO $4,806 /YR $400.50 /MO
Space Use
Office
Build-Out
Full Build-Out
Available
Now

1st Floor, Ste 110

Size 1,568 SF
Term Negotiable
Rental Rate $18.00 /SF/YR
Space Use Office/Medical
Build-Out Spec Suite
Available Now

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.

  • Listed rate may not include certain utilities, building services and property expenses
  • 3 Private Offices
  • 1 Conference Room
  • Finished Ceilings: 8’2”
  • Reception Area
  • Central Air and Heating
  • Private Restrooms
  • Wi-Fi Connectivity
  • Print/Copy Room
  • Security System
  • Closed Circuit Television Monitoring (CCTV)
  • Corner Space
  • Drop Ceilings
  • Secure Storage
  • Recessed Lighting
  • Natural Light
  • After Hours HVAC Available
  • DDA Compliant
  • Open-Plan
  • Hardwood Floors
  • Smoke Detector
  • Wheelchair Accessible
  • Great Location on corner of Mt Vernon & Barton
  • Lg Corner unit w/ADA ramp & ample Parking
  • CCTV Security Camera Sys. & High Speed Wifi Ready
  • Kitchen with W/D hookups + 2 Private Restrooms
  • Locking File Storage & Lg Reception/Waiting area
  • 24-Hr Building Access & HVAC

2nd Floor, Ste 205

Size 150 SF
Term Negotiable
Rental Rate $32.04 /SF/YR
Space Use Office
Build-Out Full Build-Out
Available Now

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.

  • Listed rate may not include certain utilities, building services and property expenses
  • Mostly Open Floor Plan Layout
  • 1 Private Office
  • 1 Workstation
  • Finished Ceilings: 8’2”
  • Central Air and Heating
  • Wi-Fi Connectivity
  • Closed Circuit Television Monitoring (CCTV)
  • Drop Ceilings
  • Recessed Lighting
  • Natural Light
  • After Hours HVAC Available
  • Open-Plan
  • Hardwood Floors
  • Smoke Detector
  • Low, Competitive Rent great for a Start Up
  • Quiet location with Sound-proofing for privacy
  • Central HVAC w/24-hr Access
  • Secure Building w/Code Locked Entrance & CCTV
  • Modern Laminate Flooring
  • Lg Picture Window and LED Lighting

Property Overview

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!

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

Property Facts

Building Type
Office
Year Built/Renovated
1971/2025
Building Height
2 Stories
Building Size
12,272 SF
Building Class
C
Typical Floor Size
6,136 SF
Unfinished Ceiling Height
10’
Parking
40 Surface Parking Spaces
Covered Parking

Select Tenants

  • Floor
  • Tenant Name
  • Industry
  • 1st
  • Arkadie Wellness
  • Health Care and Social Assistance
  • 2nd
  • BDIPS
  • Health Care and Social Assistance
  • 1st
  • Breaking Cycles Counseling
  • Health Care and Social Assistance
  • 2nd
  • David McCoy
  • Health Care and Social Assistance
  • 2nd
  • David Nhep Tattoo Studio
  • Services
  • 1st
  • Flotrice Studios
  • Services
  • Unknown
  • Grand Terrace Chiropractic/Bissani Integrated Heal
  • Health Care and Social Assistance
  • 2nd
  • Radiant Therapy, Landon Ehteshamzadeh
  • Health Care and Social Assistance
  • 2nd
  • Relief Spot
  • Services
  • 1st
  • Tiffany's Lash Studio
  • Services
Fairly walkable
50/100
Exceptionally drivable
100/100
Limited public transit
30/100
Fairly bikeable
40/100
  • Listing ID: 41193880

  • Date on Market: 7/7/2026

  • Last Updated:

  • Address: 12139 Mt Vernon Ave, Grand Terrace, CA 92313

Contact the Leasing Agent

Keeney Professional Building | 12139 Mt Vernon Ave

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