Medical office space · data as of September 2026
3851 Katella, Los Alamitos
4 medical office spaces listed, 12,148 SF in all, largest 4,099 SF (about 6 to 10 exam rooms). Three of them are vacant now. Asking $2.75/SF/mo on a NNN basis.
Listed spaces at 3851 Katella
| Space | Use | Term |
|---|---|---|
| Suite 115 · 894 SF · available now | Medical | Negotiable |
| Suite 255 · 3,056 SF · available Oct 2026 | Medical | 3 Years |
| Suite 315 · 2,646 to 4,099 SF · available now | Medical | 1 - 10 Years |
| Suite 305 · 1,453 to 4,099 SF · available now | Medical | 1 - 10 Years |
Sizes are rentable square feet. 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
- 12,148 SF
- Largest space
- 4,099 SF
- Fits
- ~6–10 rooms
- Vacant now
- 3 of 4
Asking rent and building facts
Asking rent
- NNN$2.75/SF/mobuilding asking range
Los Alamitos, Cypress and Seal Beach for comparison
- NNN$2.20–$2.85/SF/mo5 buildings
- Full Service$2.50–$5.59/SF/mo4 buildings
- Modified Gross$3.00–$3.50/SF/mo2 buildings
Lowest to highest published building asking rents in Los Alamitos, Cypress and Seal 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
- Built2014
- Stories3
- Rentable building area70,000 SF
- Parking ratio3.02 per 1,000 SF
- Leased87%
Hospitals near 3851 Katella
- UCI Health - Los Alamitos, Los Alamitos0.1 mi
- La Palma Intercommunity Hospital, La Palma3.4 mi
- Anaheim Community Hospital, Anaheim3.5 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 Los Alamitos, Cypress and Seal Beach
- 3801 Katella Ave 8,106 SF · $2.50/SF/mo
- 3742 Katella Ave 1,000 SF · $3.25/SF/mo
- 4132 Katella Ave Los Alamitos Professional Building 832 SF · $2.30/SF/mo
- 4281 Katella Ave Katella Corporate Center 2,952 SF · $3.05–$3.25/SF/mo
See every building in the Los Alamitos, Cypress and Seal Beach trade area guide.
Questions about 3851 Katella
What medical office space is available at 3851 Katella?
3851 Katella in Los Alamitos lists 4 medical office spaces, 12,148 SF in all, as of September 2026: Suite 115 · 894 SF · available now, Suite 255 · 3,056 SF · available Oct 2026, Suite 315 · 2,646 to 4,099 SF · available now, Suite 305 · 1,453 to 4,099 SF · available now. Sizes are rentable square feet. Of those, three are vacant now.
What is the asking rent at 3851 Katella?
$2.75/SF/mo, on a NNN basis, as published for this Class B building, built in 2014. Taxes, insurance and common-area costs come on top of an NNN rate.
How many exam rooms fit in the largest space at 3851 Katella?
About 6 to 10. The largest listed space is 4,099 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 2014.
Which hospitals are near 3851 Katella?
UCI Health - Los Alamitos is the closest, 0.1 mile away. Also nearby: La Palma Intercommunity Hospital, La Palma, 3.4 miles; Anaheim Community Hospital, Anaheim, 3.5 miles. Distances are straight-line miles to each hospital's address on the CMS hospital list.
Is the availability at 3851 Katella 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 3851 Katella
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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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