Medical office space · data as of September 2026
Medical office space for lease in Westminster
9 buildings with 80,188 SF of medical space available across 15 listed spaces. Nine buildings publish an asking rent; no class has five or more on one lease structure, too few to call a figure typical.
Of the eight buildings in Westminster with a recorded year built, the newest went up in 1987.
Across the eight buildings, years built run from 1928 to 1987, with a median of 1979. In a building that age, the items that decide a build-out are plumbing, ADA restrooms and HVAC capacity. They get priced into the tenant improvement allowance (the landlord's contribution to build-out), or into your budget.
The second thing to know is about price. Those nine buildings quote three lease structures: Full Service in four, at $1.65 to $2.45/SF/month; Modified Gross in three and NNN in two. From the real estate side, the structure is part of the price. On an NNN quote, taxes, insurance and common-area costs come on top, so ask for the operating expense history (what those costs actually ran) before setting it next to a Full Service number.
Short version: the newest building went up in 1987, and landlords there quote three lease structures. Comparing rates without converting structures compares labels. When you set a quote here next to your current rent, are you comparing the same structure?
Westminster at a glance
- Buildings
- 9
- Medical space available
- 80,188 SF
- Vacant now
- 40,970 SF
- Largest single space
- 16,821 SF
Asking rents by lease structure
- Full Service$1.55–$2.45/SF/mo4 buildings
- Modified Gross$1.85–$3.00/SF/mo3 buildings
- NNN$2.25–$3.95/SF/mo2 buildings
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 rooms1
- 3–4 rooms4
- 5–7 rooms3
- 8–12 rooms4
- 13+ rooms3
Room counts assume 350 to 500 usable SF per exam room, with rentable area 10% to 20% above usable.
Building class
- Class A1
- Class B3
- Class C5
Hospitals within 5 miles
- Huntington Beach Hospital, Huntington Beach3.9 mi
- Anaheim Community Hospital, Anaheim4.0 mi
- West Anaheim Medical Center, Anaheim4.5 mi
- UCI Health - Los Alamitos, Los Alamitos4.8 mi
- Memorialcare Orange Coast Medical Center, Fountain Valley4.8 mi
Straight-line miles from the center of the Westminster buildings to the Census Bureau geocode of each hospital's address on the CMS hospital list.
Buildings with medical space available
| Building | Class | Built | Medical space | Largest space | Fits | Asking rent | |
|---|---|---|---|---|---|---|---|
| 5405 Garden Grove Blvd | B | 1981 | 23,512 SF3 spaces
| 11,756 SF | ~19–30 rooms | $2.45/SF/mo Full Service | |
| 8291-8295 Westminster Blvd Unity Professional Center | C | 1977 | 16,821 SF1 space
| 16,821 SF | ~28–43 rooms | $3.95/SF/mo NNN | |
| 5455 Garden Grove Blvd | A | 1984 | 15,759 SF2 spaces
| 10,641 SF | ~17–27 rooms | $2.45/SF/mo Full Service | |
| 5555 Garden Grove Blvd | B | 1981 | 10,692 SF4 spaces
| 3,903 SF | ~6–10 rooms | $2.45/SF/mo Full Service | |
| 14560 Magnolia St | C | 4,500 SF1 space
| 4,500 SF | ~7–11 rooms | $1.85–$3.00/SF/mo Modified Gross | ||
| 13950 Milton Ave Westminster Executive Plaza | B | 1987 | 3,704 SF1 space
| 3,704 SF | ~6–9 rooms | $1.55–$1.75/SF/mo Full Service | |
| 8130 McFadden Ave Westminster Executive Offices | C | 1976 | 2,200 SF1 space
| 2,200 SF | ~3–5 rooms | $3.00/SF/mo Modified Gross | |
| 14550 Magnolia St Bldg. 2 | C | 1978 | 2,000 SF1 space
| 2,000 SF | ~3–5 rooms | $2.50/SF/mo Modified Gross | |
| 8341 Westminster Blvd | C | 1928 | 1,000 SF1 space
| 1,000 SF | ~1–2 rooms | $2.25/SF/mo NNN |
Availability and asking rates change frequently and are subject to verification. Current terms are confirmed before any tour.
Compared to nearby
| Area | Buildings | Medical space | Published asking rents ($/SF/mo, buildings) |
|---|---|---|---|
| Westminster | 9 | 80,188 SF | Full Service $1.55–$2.45 (4) · Modified Gross $1.85–$3.00 (3) · NNN $2.25–$3.95 (2) |
| Garden Grove | 9 | 47,895 SF | NNN $2.50–$4.50 (3) · Full Service $2.30–$2.35 (2) |
| Huntington Beach | 16 | 110,699 SF | Modified Gross $1.50–$4.00 (6) · NNN $1.90–$3.00 (5) · Full Service $3.00 (1) |
| Fountain Valley | 7 | 48,905 SF | Full Service $3.60 (1) · Modified Gross $1.60 (1) |
| Orange County overall | 317 | 2,274,339 SF | NNN $1.15–$5.50 (67) · Modified Gross $1.25–$4.95 (49) · Full Service $1.25–$6.00 (47) |
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 Westminster
How many medical office buildings have space available in Westminster?
Westminster has 9 buildings with medical office space available as of September 2026: 80,188 SF across 15 listed spaces. Of that, 40,970 SF is marked vacant now, and the largest single space is 16,821 SF, about 28 to 43 exam rooms.
What do medical office leases cost in Westminster?
In Westminster, eight buildings publish an asking rent with a named lease structure, but no class has five or more on one structure, too few to call any figure typical: Class B on Full Service in three, Class C on Modified Gross in two and Class C on NNN in two. Across West Orange County, Class B buildings on Full Service ask a median $2.48/SF/month. 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 Westminster?
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 Westminster, the listed spaces break down as 1 for 1 to 2 rooms, 4 for 3 to 4, 3 for 5 to 7, 4 for 8 to 12 and 3 for 13 or more.
Which hospitals are near Westminster?
Huntington Beach Hospital is the closest hospital, 3.9 miles from the center of the Westminster trade area. Also within 5 miles: Anaheim Community Hospital, Anaheim, 4.0 miles; West Anaheim Medical Center, Anaheim, 4.5 miles; UCI Health - Los Alamitos, Los Alamitos, 4.8 miles; Memorialcare Orange Coast Medical Center, Fountain Valley, 4.8 miles. Distances are straight-line miles from the Census Bureau geocode of each hospital's address on the CMS hospital list.
How current is the Westminster 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 Westminster
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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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