Medical office space · data as of September 2026
Medical office space for lease in Los Alamitos, Cypress and Seal Beach
13 buildings with 75,387 SF of medical space available across 25 listed spaces. 11 buildings publish an asking rent; no class has five or more on one lease structure, too few to call a figure typical.
The center of the Los Alamitos, Cypress and Seal Beach buildings is 0.7 mile from UCI Health - Los Alamitos.
That's straight-line distance from the middle of 13 buildings, so individual buildings sit closer or farther. Across the trade area, 11 buildings publish an asking rent, and two post no asking rent. Of the 13 buildings, 6 sit on Katella Ave.
One more fact changes the read. Only 2 of 25 listed spaces are 4,200 SF or larger. From the real estate side, scarce large space is a reason to ask about two adjacent suites as well as one big one. Ask each landlord what's contiguous (next to each other on the same floor), not just what's listed.
Put together: UCI Health - Los Alamitos sits 0.7 mile out, and only 2 of 25 spaces are 4,200 SF or larger. Large practices here are choosing from a short list. How many exam rooms will your practice need at the end of the next lease, not the start?
Los Alamitos, Cypress and Seal Beach at a glance
- Buildings
- 13
- Medical space available
- 75,387 SF
- Vacant now
- 66,771 SF
- Largest single space
- 31,585 SF
Asking rents by lease structure
- 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
2 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 rooms9
- 3–4 rooms10
- 5–7 rooms4
- 8–12 rooms1
- 13+ rooms1
Room counts assume 350 to 500 usable SF per exam room, with rentable area 10% to 20% above usable.
Building class
- Class A1
- Class B9
- Class C3
Hospitals within 5 miles
- UCI Health - Los Alamitos, Los Alamitos0.7 mi
- Anaheim Community Hospital, Anaheim3.5 mi
- VA Long Beach Healthcare System (VA), Long Beach3.6 mi
- La Palma Intercommunity Hospital, La Palma3.9 mi
- West Anaheim Medical Center, Anaheim4.2 mi
Straight-line miles from the center of the Los Alamitos, Cypress and Seal Beach 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 | |
|---|---|---|---|---|---|---|---|
| 5255 Katella Ave | B | 2025 | 31,585 SF1 space
| 31,585 SF | ~52–82 rooms | Withheld ask us | |
| 3851 Katella | B | 2014 | 12,148 SF4 spaces
| 4,099 SF | ~6–10 rooms | $2.75/SF/mo NNN | |
| 3801 Katella Ave | A | 1973 | 8,106 SF5 spaces
| 2,301 SF | ~3–5 rooms | $2.50/SF/mo Full Service | |
| 13904-13962 Seal Beach Blvd | B | 1963 | 5,643 SF1 space
| 5,643 SF | ~9–14 rooms | Withheld ask us | |
| 4272-4390 Katella Ave | C | 1980 | 4,560 SF3 spaces
| 2,280 SF | ~3–5 rooms | $2.75/SF/mo NNN | |
| 4281 Katella Ave Katella Corporate Center | B | 1987 | 2,952 SF1 space
| 2,952 SF | ~4–7 rooms | $3.05–$3.25/SF/mo Full Service | |
| 909-915 Electric Ave | C | 1967 | 2,800 SF2 spaces
| 1,600 SF | ~2–4 rooms | $3.00–$3.50/SF/mo Modified Gross | |
| 2999 Westminster Ave | B | 1969 | 1,805 SF3 spaces
| 948 SF | ~1–2 rooms | $5.59/SF/mo Full Service | |
| 10601 Walker St Los Alpress Medical Building | B | 2008 | 1,759 SF1 space
| 1,759 SF | ~2–4 rooms | $2.85/SF/mo NNN | |
| 5631 Lincoln Ave | C | 1987 | 1,651 SF1 space
| 1,651 SF | ~2–4 rooms | $2.20/SF/mo NNN | |
| 3742 Katella Ave | B | 2011 | 1,000 SF1 space
| 1,000 SF | ~1–2 rooms | $3.25/SF/mo Modified Gross | |
| 4132 Katella Ave Los Alamitos Professional Building | B | 1970 | 832 SF1 space
| 832 SF | ~1–2 rooms | $2.30/SF/mo NNN | |
| 5122 Katella Ave Siboney Professional Bldg | B | 1986 | 546 SF1 space
| 546 SF | ~1 room | $2.50/SF/mo Full Service |
Availability and asking rates change frequently and are subject to verification. Current terms are confirmed before any tour.
Compared to nearby
| Area | Buildings | Medical space | Published asking rents ($/SF/mo, buildings) |
|---|---|---|---|
| Los Alamitos, Cypress and Seal Beach | 13 | 75,387 SF | NNN $2.20–$2.85 (5) · Full Service $2.50–$5.59 (4) · Modified Gross $3.00–$3.50 (2) |
| Buena Park and La Palma | 7 | 28,850 SF | Full Service $2.00 (1) · Modified Gross $1.85–$2.00 (1) · NNN $3.00 (1) |
| 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) |
| 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 Los Alamitos, Cypress and Seal Beach
How many medical office buildings have space available in Los Alamitos, Cypress and Seal Beach?
Los Alamitos, Cypress and Seal Beach has 13 buildings with medical office space available as of September 2026: 75,387 SF across 25 listed spaces. Of that, 66,771 SF is marked vacant now, and the largest single space is 31,585 SF, about 52 to 82 exam rooms.
What do medical office leases cost in Los Alamitos, Cypress and Seal Beach?
In Los Alamitos, Cypress and Seal Beach, 11 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 B on NNN in three and Class C on NNN in two. Across West Orange County, Class B buildings on Full Service ask a median $2.48/SF/month. Another two 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 Los Alamitos, Cypress and Seal Beach?
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 Los Alamitos, Cypress and Seal Beach, the listed spaces break down as 9 for 1 to 2 rooms, 10 for 3 to 4, 4 for 5 to 7, 1 for 8 to 12 and 1 for 13 or more.
Which hospitals are near Los Alamitos, Cypress and Seal Beach?
UCI Health - Los Alamitos is the closest hospital, 0.7 mile from the center of the Los Alamitos, Cypress and Seal Beach trade area. Also within 5 miles: Anaheim Community Hospital, Anaheim, 3.5 miles; VA Long Beach Healthcare System (VA), Long Beach, 3.6 miles; La Palma Intercommunity Hospital, La Palma, 3.9 miles; West Anaheim Medical Center, Anaheim, 4.2 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 Los Alamitos, Cypress and Seal Beach 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 Los Alamitos, Cypress and Seal Beach
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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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