Medical office space · data as of September 2026
355 Placentia Ave, Newport Beach Mariner's Medical Plaza
1 medical office space listed, 750 SF in all, largest 750 SF (about 1 exam rooms). It's vacant now. Asking $1.33/SF/mo, set by the sublessor.
Listed spaces at 355 Placentia Ave
| Space | Use | Term |
|---|---|---|
| Suite 305 · 750 SF · sublease · available now | Medical | Thru Aug |
Sizes are rentable square feet. Every space listed here is sublease: the sublessor sets the terms, the remaining term comes with it, and the landlord's consent applies. Listed with the building as of September 2026. Availability, asking terms and tenant improvement allowance are confirmed with the landlord before any tour.
- Medical space listed
- 750 SF
- Largest space
- 750 SF
- Fits
- ~1 room
- Vacant now
- 1 of 1
Asking rent and building facts
Asking rent
- Full Service · sublease$1.33/SF/mobuilding asking range
Newport Beach for comparison
- Full Service$2.99–$6.00/SF/mo5 buildings
- Modified Gross$2.50–$4.95/SF/mo3 buildings
- NNN$3.98–$5.25/SF/mo3 buildings
- Lease type not stated$3.10/SF/mo1 building
Lowest to highest published building asking rents in Newport Beach, grouped by lease structure. Full Service includes operating costs and utilities; NNN adds taxes, insurance and common-area costs; Modified Gross splits them.
Building
- Building classClass B
- Built1975
- Stories3
- Rentable building area30,000 SF
- Parking ratio2.43 per 1,000 SF
Hospitals near 355 Placentia Ave
- Hoag Memorial Hospital Presbyterian, Newport Beach0.3 mi
- College Hospital Costa Mesa, Costa Mesa2.1 mi
- Memorialcare Orange Coast Medical Center, Fountain Valley5.4 mi
Straight-line miles from the Census Bureau geocode of each hospital's address on the CMS hospital list.
Other buildings with medical space in Newport Beach
- 351 Hospital Rd Newport Lido Medical Center - Tower 1 37,698 SF
- 361 Hospital Rd Newport Lido Medical Center - Tower 2 17,828 SF · $2.50/SF/mo
- 1501 Superior Ave Newport Superior Medical Plaza 4,176 SF · $5.00/SF/mo
- 3300 W Coast Hwy 7,556 SF · $4.95/SF/mo
See every building in the Newport Beach trade area guide.
Questions about 355 Placentia Ave
What medical office space is available at 355 Placentia Ave?
355 Placentia Ave in Newport Beach lists 1 medical office space, 750 SF in all, as of September 2026: Suite 305 · 750 SF · sublease · available now. Sizes are rentable square feet.
What is the asking rent at 355 Placentia Ave?
$1.33/SF/mo, on a Full Service basis, as published for this Class B building, built in 1975. Every listed space is sublease, so that figure is the sublessor's ask, not the landlord's.
How many exam rooms fit in the largest space at 355 Placentia Ave?
About 1. The largest listed space is 750 SF, and planning runs 385 to 600 rentable SF per exam room (350 to 500 usable, plus a 10% to 20% load factor, the share of common areas billed to each tenant). Plumbing, ADA restrooms and HVAC decide whether that count works in a building that wasn't built for exam rooms. This one dates to 1975.
Which hospitals are near 355 Placentia Ave?
Hoag Memorial Hospital Presbyterian is the closest, 0.3 mile away. Also nearby: College Hospital Costa Mesa, Costa Mesa, 2.1 miles; Memorialcare Orange Coast Medical Center, Fountain Valley, 5.4 miles. Distances are straight-line miles to each hospital's address on the CMS hospital list.
Is the availability at 355 Placentia Ave current?
It's from the September 2026 survey of medical office availability. Availability, rent and tenant improvement allowance are confirmed with the landlord before any tour.
Ask about 355 Placentia Ave
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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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