Medical office space · data as of September 2026
Medical office space for lease in Rancho Cucamonga and Ontario
19 buildings with 127,116 SF of medical space available across 43 listed spaces. The largest like group, five Class B buildings on Modified Gross, asks a median $2.35/SF/month.
Rancho Cucamonga and Ontario's published rents this September come on four different lease structures, and they aren't the same kind of number: Modified Gross in seven buildings, Full Service in four and NNN in three.
Modified Gross splits operating costs between landlord and tenant, lease by lease; Full Service rolls operating costs and utilities into the rate; NNN puts taxes, insurance and common-area costs on top of the rate. So a Modified Gross rate and a Full Service rate can't be compared until both are converted to total occupancy cost (rent plus everything the lease adds on top). Modified Gross runs $1.90 to $2.63/SF/month here, Full Service $2.25 to $6.71 and NNN $1.50 to $2.69.
One more fact changes the read. The largest single space listed here is 20,121 SF, about 33 to 52 exam rooms. From the real estate side, a hard ceiling on size is worth knowing before you fall for a building. If the practice may outgrow 20,121 SF, the expansion clause matters more than the rate.
Short version: landlords in Rancho Cucamonga and Ontario quote four lease structures, and the largest single space is 20,121 SF. Size sets the shortlist before price does. How much space does your practice need in the next lease, in exam rooms?
Rancho Cucamonga and Ontario at a glance
- Buildings
- 19
- Medical space available
- 127,116 SF
- Vacant now
- 120,502 SF
- Largest single space
- 20,121 SF
Asking rents by lease structure
- Modified Gross$1.90–$2.75/SF/mo7 buildings
- Full Service$2.25–$10.00/SF/mo4 buildings
- NNN$1.50–$2.69/SF/mo3 buildings
- Gross + Utilities$2.95/SF/mo1 building
3 buildings withhold pricing or don't publish it. Those numbers come from the landlords on request.
Full Service includes operating costs and utilities; NNN adds taxes, insurance and common-area costs on top of base rent; Modified Gross splits them. Compare structures, not just rates. These ranges span every building class and age; the questions below compare like with like.
Available spaces by size
- 1–2 rooms5
- 3–4 rooms13
- 5–7 rooms5
- 8–12 rooms2
- 13+ rooms7
Room counts assume 350 to 500 usable SF per exam room, with rentable area 10% to 20% above usable.
Building class
- Class A1
- Class B12
- Class C6
Buildings with medical space available
| Building | Class | Built | Medical space | Largest space | Fits | Asking rent | |
|---|---|---|---|---|---|---|---|
| 8110 Mango Ave Fontana Medical Plaza | C | 1985 | 22,405 SF3 spaces
| 20,121 SF | ~33–52 rooms | $2.40/SF/mo Full Service | |
| 17051 Sierra Lakes Pky Dignity Medical Plaza | B | 2008 | 22,274 SF4 spaces
| 10,068 SF | ~16–26 rooms | $2.69/SF/mo NNN | |
| 9616 Archibald Ave Airport Corporate Center | B | 2000 | 16,861 SF3 spaces
| 9,000 SF | ~15–23 rooms | $2.35/SF/mo Modified Gross | |
| 10470 Foothill Blvd Virginia Dare Winery Business Centre | B | 1985 | 11,035 SF3 spaces
| 4,875 SF | ~8–12 rooms | $1.90/SF/mo Modified Gross | |
| 17590 Foothill Blvd | B | 1980 | 10,568 SF1 space
| 10,568 SF | ~17–27 rooms | $2.25/SF/mo NNN | |
| 9568 Archibald Ave | C | 2001 | 10,084 SF1 space
| 10,084 SF | ~16–26 rooms | $2.35/SF/mo Modified Gross | |
| 8283 Grove Ave Grove Professional Plaza | C | 1989 | 5,651 SF4 spaces
| 1,929 SF | ~3–5 rooms | $2.50–$2.75/SF/mo Modified Gross | |
| 9353 Fairway View Pl Bldg 2 | B | 2004 | 4,797 SF3 spaces
| 1,735 SF | ~2–4 rooms | $2.40/SF/mo Modified Gross | |
| 9229 Utica Ave Bldg 1 | C | 1987 | 4,745 SF1 space
| 4,745 SF | ~7–12 rooms | $1.50/SF/mo NNN | |
| 3155 Sedona Ct Bldg D | B | 2006 | 3,289 SF1 space
| 3,289 SF | ~5–8 rooms | $2.50/SF/mo Modified Gross | |
| 16465 Sierra Lakes Pky Sierra San Antonio Medical Plaza | A | 2006 | 2,839 SF1 space
| 2,839 SF | ~4–7 rooms | Withheld ask us | |
| 8599 Haven Ave | B | 1991 | 2,011 SF1 space
| 2,011 SF | ~3–5 rooms | $2.45/SF/mo Full Service | |
| 10807 Laurel St | C | 1987 | 1,817 SF1 space
| 1,817 SF | ~3–4 rooms | $2.48/SF/mo Modified Gross · sublease | |
| 3333 Concours Phase II Bldg 4 | B | 2005 | 1,687 SF1 space
| 1,687 SF | ~2–4 rooms | $2.25/SF/mo Modified Gross | |
| 521-525 N Laurel Ave | B | 1978 | 1,590 SF11 spaces
| 250 SF | $3.41–$10.00/SF/mo Full Service | ||
| 9161 Sierra Ave | C | 1988 | 1,521 SF1 space
| 1,521 SF | ~2–3 rooms | Withheld ask us | |
| 12499 Victoria Gardens Ln | B | 2007 | 1,500 SF1 space
| 1,500 SF | ~2–3 rooms | Withheld ask us | |
| 10837 Laurel St | B | 1987 | 1,447 SF1 space
| 1,447 SF | ~2–3 rooms | $2.95/SF/mo Gross + Utilities | |
| 10832 Laurel St Vaniparo Plaza | B | 2006 | 995 SF1 space
| 995 SF | ~1–2 rooms | $2.25/SF/mo Full Service |
Availability and asking rates change frequently and are subject to verification. Current terms are confirmed before any tour.
Compared to nearby
| Area | Buildings | Medical space | Published asking rents ($/SF/mo, buildings) |
|---|---|---|---|
| Rancho Cucamonga and Ontario | 19 | 127,116 SF | Modified Gross $1.90–$2.75 (7) · Full Service $2.25–$10.00 (4) · NNN $1.50–$2.69 (3) |
| Upland and Montclair | 11 | 37,640 SF | NNN $1.75–$2.95 (6) · Modified Gross $1.75–$3.25 (4) |
| Chino and Chino Hills | 5 | 16,135 SF | NNN $2.75–$3.25 (2) · Full Service $2.80 (1) · Modified Gross $2.15 (1) |
| San Bernardino | 29 | 194,489 SF | Modified Gross $1.45–$2.90 (10) · NNN $1.15–$2.25 (4) · Full Service $1.55–$2.00 (2) |
| Inland Empire overall | 219 | 1,107,256 SF | NNN $1.10–$3.25 (75) · Modified Gross $1.20–$3.83 (57) · Full Service $1.50–$10.00 (13) |
Lowest to highest published building asking rents, grouped by lease structure; the three most common structures are shown. Each range mixes building classes and ages. See the full rent trends report.
Questions about medical office space in Rancho Cucamonga and Ontario
How many medical office buildings have space available in Rancho Cucamonga and Ontario?
Rancho Cucamonga and Ontario has 19 buildings with medical office space available as of September 2026: 127,116 SF across 43 listed spaces. Of that, 120,502 SF is marked vacant now, and the largest single space is 20,121 SF, about 33 to 52 exam rooms.
What do medical office leases cost in Rancho Cucamonga and Ontario?
In Rancho Cucamonga and Ontario, Class B buildings on Modified Gross ask $1.90 to $2.50/SF/month, with a median of $2.35, across five buildings built from 1985 to 2006. Each building counts once, at the middle of its published range. The remaining 10 priced buildings sit in classes and structures with fewer than five buildings each, too few to call typical. Another three buildings post no asking rent; those landlords quote on request. Full Service includes operating costs and utilities, NNN adds taxes, insurance and common-area costs on top, and Modified Gross splits them, so compare total occupancy cost, not the headline rate.
How much space does a medical practice need in Rancho Cucamonga and Ontario?
About 385 to 600 rentable square feet per exam room. That's 350 to 500 usable square feet (the room plus its share of waiting, work areas, storage, restrooms and halls), and leases are quoted in rentable square feet, which run 10% to 20% above usable in multi-tenant medical buildings. In Rancho Cucamonga and Ontario, the listed spaces break down as 5 for 1 to 2 rooms, 13 for 3 to 4, 5 for 5 to 7, 2 for 8 to 12 and 7 for 13 or more.
How current is the Rancho Cucamonga and Ontario availability?
It's from the September 2026 survey of medical office availability. Spaces lease and asking terms change between monthly pulls, so current availability, rent and tenant improvement allowance are confirmed with each landlord before any tour.
Send me what fits in Rancho Cucamonga and Ontario
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Your advisor
Jamal Brown
Real Estate Broker · CA DRE #01780052
Jamal has spent more than 23 years in commercial real estate and has negotiated and audited more than 1,000 leases. He represents medical practices as tenants and buyers, never landlords, across Los Angeles, Orange County, San Diego and the Inland Empire. Every request sent through this site gets a reply within one business day.
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