Your email has been sent.
21671 Gateway Center Dr 871 - 2,724 SF of Office Space Available in Diamond Bar, CA 91765
Highlights
- Prime location in Gateway Center with immediate access to the 57 and 60 freeways.
- On-site property management and 24-hour secured access for tenant convenience.
- Close to Ontario International Airport, Cal Poly Pomona, and major retail centers.
- Suites feature modern finishes, private offices, and abundant natural light.
- Ample surface parking
All Available Spaces(3)
Display Rental Rate as
- Space
- Size
- Term
- Rental Rate
- Space Use
- Build-Out
- Available
Suite 101 is an 871 SF, fully built-out first-floor office in the prestigious Gateway Center at 21671 Gateway Center Drive in Diamond Bar, offered on a Modified Gross lease at $2.30/SF/MO. The suite is designed for immediate occupancy and includes three private offices, a dedicated conference room, five open workstations, and a professional reception area. Large windows flood the space with natural light and look out over the well-maintained corporate park. Interior finishes include hardwood flooring, fresh modern paint, and central HVAC on a dedicated electric meter — so unlike full-service buildings that shut climate control off at 6 PM, you control your own heat and air around the clock. The landlord covers water, trash, property taxes, property insurance, CAM, and landscaping; tenant carries liability insurance, electric, and data (Spectrum high-speed available). The suite has CCTV monitoring on the floor and benefits from 24/7 secured building access, on-site property management, and ample surface parking. Ideal for professional services firms (legal, accounting, consulting, insurance), medical practices, tech startups, or a regional satellite office. Quick facts to mirror in the structured fields • Size: 871 SF · 1st Floor · Office • Rate: $2.30/SF/MO · $27.60/SF/YR · $2,003.30/MO · $24,039.60/YR • Lease term: 2–5 years · Available: Now • Build-out: Full · Condition: Excellent • 3 private offices · 1 conference room · 5 workstations · ~8' finished ceilings • Central HVAC · After-hours HVAC available · Hardwood floors · CCTV • Fits ~2–5 people
- Listed rate may not include certain utilities, building services and property expenses
- Fits 2 - 5 People
- 1 Conference Room
- Finished Ceilings: 8’
- Central Air and Heating
- After Hours HVAC Available
- Move-in-ready 871 SF first-floor office at $2.30SF
- Sub-market lease rate
- Less than 1 mile to SR-57 / SR-60
- Fully Built-Out as Professional Services Office
- 3 Private Offices
- 5 Workstations
- Space is in Excellent Condition
- Closed Circuit Television Monitoring (CCTV)
- Hardwood Floors
- Run your own AC 24/7
- Built-out with 3 private offices
Suite 109 is one of the most desirable units in the building — a 944 SF corner office on the first floor with sweeping views toward the surrounding mountains and the SR-57 / SR-60 corridor, offered on a Modified Gross lease at $2.30/SF/MO. Freshly painted with contemporary finishes, the suite features four generously sized private offices, a dedicated conference room, a print/copy room, and six workstations — a strong fit for a small professional services firm, medical practice, or growing regional team. Hardwood flooring runs throughout, large windows fill the space with natural light, and central HVAC runs on a dedicated electric meter so the tenant controls climate 24/7 — a meaningful upgrade over full-service buildings in the area that shut HVAC off at 6 PM during Diamond Bar's hot summers. The landlord covers water, trash, property taxes, property insurance, CAM, and landscaping; tenant carries liability insurance, electric, and high-speed internet (Spectrum service available). Building amenities include on-site property management, controlled access, 24/7 secured entry, and abundant surface parking for tenants and visitors. The Gateway Center address puts you less than a mile from the SR-57 / SR-60 interchange and within ~15 miles of Ontario International Airport — ideal for any tenant needing easy regional access. Quick facts to mirror in the structured fields • Size: 944 SF · 1st Floor · Office · Corner Space • Rate: $2.30/SF/MO · $27.60/SF/YR · $2,171.20/MO · $26,054.40/YR • Lease term: 2–5 years · Available: Now • Build-out: Full · Condition: Excellent · Mountain views • 4 private offices · 1 conference room · 6 workstations · print/copy room • Central heating · After-hours HVAC · Hardwood floors · Safe and secure • Fits ~2–5 people
- Listed rate may not include certain utilities, building services and property expenses
- Fits 2 - 5 People
- 1 Conference Room
- Finished Ceilings: 8’
- Central Heating System
- Corner Space
- Hardwood Floors
- $2.30/SF/MO Modified Gross
- Built-out with 4 private offices
- Fully Built-Out as Standard Office
- 4 Private Offices
- 6 Workstations
- Space is in Excellent Condition
- Print/Copy Room
- After Hours HVAC Available
- Highly desirable corner unit - 944 SF with views
- Run your own AC 24/7
- Quick access to SR-57 / SR-60
Suite description Suite 203 is a 909 SF second-floor office in the prestigious Gateway Center at 21671 Gateway Center Drive, Diamond Bar, offered on a Modified Gross lease at $2.30/SF/MO. The suite is positioned to take advantage of the building's elevated views and natural light, with central HVAC running on a dedicated electric meter — so the tenant controls climate around the clock, a real advantage over full-service buildings in the area that shut AC off at 6 PM during hot Diamond Bar summers. The landlord covers water, trash, property taxes, property insurance, CAM, and landscaping; tenant carries liability insurance, electric, and high-speed internet (Spectrum service available throughout the building). Tenants enjoy on-site property management, controlled-access entry, 24/7 secured access, and ample surface parking. The location places you less than a mile from the SR-57 / SR-60 interchange, with quick connections to I-10, I-210, Orange County, and San Bernardino County — and about 15 miles from Ontario International Airport. Diamond Bar's affluent demographics, low crime rate, and top-tier school district (Walnut Valley Unified) make the address a strong fit for professional services firms, medical practices, tech startups, or regional satellite offices looking for a polished, accessible Tri-County address at a sub-market rate. Quick facts to mirror in the structured fields • Size: 909 SF · 2nd Floor · Office • Rate: $2.30/SF/MO · $27.60/SF/YR · $2,090.70/MO · $25,088.40/YR • Lease term: 2–5 years · Available: Now
- Listed rate may not include certain utilities, building services and property expenses
- Fits 2 - 5 People
- 1 Conference Room
- Space is in Excellent Condition
- Reception Area
- After Hours HVAC Available
- 909 SF second-floor office at $2.30/SF/MO
- Located in the prestigious Gateway Center
- Suitable for professional services
- Fully Built-Out as Standard Office
- 3 Private Offices
- Finished Ceilings: 8’
- Central Air and Heating
- Corner Space
- Hardwood Floors
- Run your own AC 24/7
- On-site property management, controlled access
| Space | Size | Term | Rental Rate | Space Use | Build-Out | Available |
| 1st Floor, Ste 101 | 871 SF | 2-5 Years | $31.20 /SF/YR $2.60 /SF/MO $27,175 /YR $2,265 /MO | Office | Full Build-Out | Now |
| 1st Floor, Ste 109 | 944 SF | 2-5 Years | $27.60 /SF/YR $2.30 /SF/MO $26,054 /YR $2,171 /MO | Office | Full Build-Out | Now |
| 2nd Floor, Ste 203 | 909 SF | 2-5 Years | $27.60 /SF/YR $2.30 /SF/MO $25,088 /YR $2,091 /MO | Office | Full Build-Out | Now |
1st Floor, Ste 101
| Size |
| 871 SF |
| Term |
| 2-5 Years |
| Rental Rate |
| $31.20 /SF/YR $2.60 /SF/MO $27,175 /YR $2,265 /MO |
| Space Use |
| Office |
| Build-Out |
| Full Build-Out |
| Available |
| Now |
1st Floor, Ste 109
| Size |
| 944 SF |
| Term |
| 2-5 Years |
| Rental Rate |
| $27.60 /SF/YR $2.30 /SF/MO $26,054 /YR $2,171 /MO |
| Space Use |
| Office |
| Build-Out |
| Full Build-Out |
| Available |
| Now |
2nd Floor, Ste 203
| Size |
| 909 SF |
| Term |
| 2-5 Years |
| Rental Rate |
| $27.60 /SF/YR $2.30 /SF/MO $25,088 /YR $2,091 /MO |
| Space Use |
| Office |
| Build-Out |
| Full Build-Out |
| Available |
| Now |
1st Floor, Ste 101
| Size | 871 SF |
| Term | 2-5 Years |
| Rental Rate | $31.20 /SF/YR |
| Space Use | Office |
| Build-Out | Full Build-Out |
| Available | Now |
Suite 101 is an 871 SF, fully built-out first-floor office in the prestigious Gateway Center at 21671 Gateway Center Drive in Diamond Bar, offered on a Modified Gross lease at $2.30/SF/MO. The suite is designed for immediate occupancy and includes three private offices, a dedicated conference room, five open workstations, and a professional reception area. Large windows flood the space with natural light and look out over the well-maintained corporate park. Interior finishes include hardwood flooring, fresh modern paint, and central HVAC on a dedicated electric meter — so unlike full-service buildings that shut climate control off at 6 PM, you control your own heat and air around the clock. The landlord covers water, trash, property taxes, property insurance, CAM, and landscaping; tenant carries liability insurance, electric, and data (Spectrum high-speed available). The suite has CCTV monitoring on the floor and benefits from 24/7 secured building access, on-site property management, and ample surface parking. Ideal for professional services firms (legal, accounting, consulting, insurance), medical practices, tech startups, or a regional satellite office. Quick facts to mirror in the structured fields • Size: 871 SF · 1st Floor · Office • Rate: $2.30/SF/MO · $27.60/SF/YR · $2,003.30/MO · $24,039.60/YR • Lease term: 2–5 years · Available: Now • Build-out: Full · Condition: Excellent • 3 private offices · 1 conference room · 5 workstations · ~8' finished ceilings • Central HVAC · After-hours HVAC available · Hardwood floors · CCTV • Fits ~2–5 people
- Listed rate may not include certain utilities, building services and property expenses
- Fully Built-Out as Professional Services Office
- Fits 2 - 5 People
- 3 Private Offices
- 1 Conference Room
- 5 Workstations
- Finished Ceilings: 8’
- Space is in Excellent Condition
- Central Air and Heating
- Closed Circuit Television Monitoring (CCTV)
- After Hours HVAC Available
- Hardwood Floors
- Move-in-ready 871 SF first-floor office at $2.30SF
- Run your own AC 24/7
- Sub-market lease rate
- Built-out with 3 private offices
- Less than 1 mile to SR-57 / SR-60
1st Floor, Ste 109
| Size | 944 SF |
| Term | 2-5 Years |
| Rental Rate | $27.60 /SF/YR |
| Space Use | Office |
| Build-Out | Full Build-Out |
| Available | Now |
Suite 109 is one of the most desirable units in the building — a 944 SF corner office on the first floor with sweeping views toward the surrounding mountains and the SR-57 / SR-60 corridor, offered on a Modified Gross lease at $2.30/SF/MO. Freshly painted with contemporary finishes, the suite features four generously sized private offices, a dedicated conference room, a print/copy room, and six workstations — a strong fit for a small professional services firm, medical practice, or growing regional team. Hardwood flooring runs throughout, large windows fill the space with natural light, and central HVAC runs on a dedicated electric meter so the tenant controls climate 24/7 — a meaningful upgrade over full-service buildings in the area that shut HVAC off at 6 PM during Diamond Bar's hot summers. The landlord covers water, trash, property taxes, property insurance, CAM, and landscaping; tenant carries liability insurance, electric, and high-speed internet (Spectrum service available). Building amenities include on-site property management, controlled access, 24/7 secured entry, and abundant surface parking for tenants and visitors. The Gateway Center address puts you less than a mile from the SR-57 / SR-60 interchange and within ~15 miles of Ontario International Airport — ideal for any tenant needing easy regional access. Quick facts to mirror in the structured fields • Size: 944 SF · 1st Floor · Office · Corner Space • Rate: $2.30/SF/MO · $27.60/SF/YR · $2,171.20/MO · $26,054.40/YR • Lease term: 2–5 years · Available: Now • Build-out: Full · Condition: Excellent · Mountain views • 4 private offices · 1 conference room · 6 workstations · print/copy room • Central heating · After-hours HVAC · Hardwood floors · Safe and secure • Fits ~2–5 people
- Listed rate may not include certain utilities, building services and property expenses
- Fully Built-Out as Standard Office
- Fits 2 - 5 People
- 4 Private Offices
- 1 Conference Room
- 6 Workstations
- Finished Ceilings: 8’
- Space is in Excellent Condition
- Central Heating System
- Print/Copy Room
- Corner Space
- After Hours HVAC Available
- Hardwood Floors
- Highly desirable corner unit - 944 SF with views
- $2.30/SF/MO Modified Gross
- Run your own AC 24/7
- Built-out with 4 private offices
- Quick access to SR-57 / SR-60
2nd Floor, Ste 203
| Size | 909 SF |
| Term | 2-5 Years |
| Rental Rate | $27.60 /SF/YR |
| Space Use | Office |
| Build-Out | Full Build-Out |
| Available | Now |
Suite description Suite 203 is a 909 SF second-floor office in the prestigious Gateway Center at 21671 Gateway Center Drive, Diamond Bar, offered on a Modified Gross lease at $2.30/SF/MO. The suite is positioned to take advantage of the building's elevated views and natural light, with central HVAC running on a dedicated electric meter — so the tenant controls climate around the clock, a real advantage over full-service buildings in the area that shut AC off at 6 PM during hot Diamond Bar summers. The landlord covers water, trash, property taxes, property insurance, CAM, and landscaping; tenant carries liability insurance, electric, and high-speed internet (Spectrum service available throughout the building). Tenants enjoy on-site property management, controlled-access entry, 24/7 secured access, and ample surface parking. The location places you less than a mile from the SR-57 / SR-60 interchange, with quick connections to I-10, I-210, Orange County, and San Bernardino County — and about 15 miles from Ontario International Airport. Diamond Bar's affluent demographics, low crime rate, and top-tier school district (Walnut Valley Unified) make the address a strong fit for professional services firms, medical practices, tech startups, or regional satellite offices looking for a polished, accessible Tri-County address at a sub-market rate. Quick facts to mirror in the structured fields • Size: 909 SF · 2nd Floor · Office • Rate: $2.30/SF/MO · $27.60/SF/YR · $2,090.70/MO · $25,088.40/YR • Lease term: 2–5 years · Available: Now
- Listed rate may not include certain utilities, building services and property expenses
- Fully Built-Out as Standard Office
- Fits 2 - 5 People
- 3 Private Offices
- 1 Conference Room
- Finished Ceilings: 8’
- Space is in Excellent Condition
- Central Air and Heating
- Reception Area
- Corner Space
- After Hours HVAC Available
- Hardwood Floors
- 909 SF second-floor office at $2.30/SF/MO
- Run your own AC 24/7
- Located in the prestigious Gateway Center
- On-site property management, controlled access
- Suitable for professional services
Property Overview
21671 Gateway Center Drive is a Class B office building in the heart of Diamond Bar's prestigious Gateway Center business district. Built in 2008 and recently refreshed, the two-story, ~26,000 SF property delivers a polished, professional environment with on-site property management, controlled-access entry, 24-hour secured access, and ample surface parking. Suites are leased on a Modified Gross basis: landlord covers water, trash, property taxes, property insurance, CAM, and landscaping. Each suite has its own dedicated electric meter, so tenants run their HVAC on their own schedule — a meaningful advantage over full-service buildings in the area that shut AC off at 6 PM during Diamond Bar's hot summer months. Tenants carry their own liability insurance and bring in their own high-speed internet, with Spectrum service available throughout the building. The address sits less than a mile from the SR-57 / SR-60 interchange and is minutes from I-10 and I-210, putting Los Angeles, Orange County, and San Bernardino County within easy reach. Ontario International Airport (ONT) is roughly 15 miles east, and tenants are within walking distance of bus service and a short drive from P.F. Chang's, Olive Garden, Chili's, In-N-Out Burger, Holiday Inn, and Ayres Suites. Located in the affluent Walnut Valley submarket — median household income ~$130,000, top-tier schools, and one of Southern California's lowest crime rates — Diamond Bar is a draw for established professionals, growing tech and medical practices, and regional headquarters.
- 24 Hour Access
- Bus Line
- Controlled Access
- Property Manager on Site
- Air Conditioning
Property Facts
Presented by
21671 Gateway Center Dr
Hmm, there seems to have been an error sending your message. Please try again.
Thanks! Your message was sent.