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Extra Space Storage - 21 Post Street, Irvine, CA

Self Storage, Car Storage, RV Storage 25 - 300 Sq. Ft.
4.8/5 - 775 Reviews
Location:
21 Post Street, Irvine, CA 92618
All units
Small
Medium
Large
Parking
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Units Availability
Small Storage Unit
10x8
Self Storage
80 Sq. Ft.
Climate-Controlled
Elevator
$126/mo
Small Storage Unit
10x5
Self Storage
50 Sq. Ft.
Climate-Controlled
$117/mo
Small Storage Unit
10x5
Self Storage
50 Sq. Ft.
Climate-Controlled
Elevator
$89/mo
Small Storage Unit
5x10
Self Storage
50 Sq. Ft.
Climate-Controlled
Elevator
$89/mo
Small Storage Unit
5x5
Self Storage
25 Sq. Ft.
Climate-Controlled
$70/mo
Small Storage Unit
5x5
Self Storage
25 Sq. Ft.
Climate-Controlled
Elevator
$41/mo
Medium Storage Unit
11x10
Self Storage
110 Sq. Ft.
Climate-Controlled
$227/mo
Medium Storage Unit
10x15
Self Storage
150 Sq. Ft.
Climate-Controlled
$285/mo
Medium Storage Unit
10x15
Self Storage
150 Sq. Ft.
Climate-Controlled
Elevator
$201/mo
Medium Storage Unit
10x10
Self Storage
100 Sq. Ft.
$292/mo
Medium Storage Unit
10x10
Self Storage
100 Sq. Ft.
Climate-Controlled
$211/mo
Medium Storage Unit
10x10
Self Storage
100 Sq. Ft.
Climate-Controlled
Elevator
$151/mo
Large Storage Unit
20x15
Self Storage
300 Sq. Ft.
Climate-Controlled
Elevator
$375/mo
Large Storage Unit
20x10
Self Storage
200 Sq. Ft.
Climate-Controlled
Elevator
$278/mo
Large Storage Unit
10x30
Parking
300 Sq. Ft.
Drive-up Access
Parking
RV Storage
$652/mo
Large Storage Unit
10x25
Parking
250 Sq. Ft.
Drive-up Access
Parking
RV Storage
$570/mo
Large Storage Unit
10x25
Self Storage
250 Sq. Ft.
Climate-Controlled
$435/mo
Large Storage Unit
10x20
Parking
200 Sq. Ft.
Car Storage
Drive-up Access
Parking
$484/mo
Large Storage Unit
10x20
Self Storage
200 Sq. Ft.
Climate-Controlled
$368/mo
Large Storage Unit
10x20
Self Storage
200 Sq. Ft.
Climate-Controlled
Elevator
$278/mo

Amenities

  • Climate-Controlled
  • Indoor
  • Drive-Up Access
  • Onsite Manager
  • Security Camera
  • Gate
  • Parking
  • Keyless Unit Access
  • Elevators
  • Multi-Level Storage
  • Online Payment
  • RV Storage

What customers are saying

4.8/5 - 775 Reviews

Read some helpful reviews of Extra Space Storage at 21 Post Street, shared by real renters with genuine experiences and honest opinions.

Tomath was absolutely amazing in helping me choose the right storage spot. From the beginning, he was very friendly, supportive, and extremely professional. He took the time to understand exactly what I needed and guided me to the best option without any pressure. His knowledge and honest advice made the whole process smooth and stress-free. It’s rare to find someone so patient and genuinely helpful. I truly appreciate his excellent customer service and would highly recommend working with him to anyone looking for storage. Thank you, Tomath, for making everything easy and clear! ... Read more
hesham f. - 24 February 2026
Clean facility. Looks fairly new. No manned office at this location but office in nearby location. They provide lock with rental because it uses proprietary lock and can't use standard u locks. Not enough parking for upper level units. ... Read more
Peter W. - 24 January 2026
We've had a storage unit at Extra Space Storage for a number of years now. The facilities are great and have kept our stuff preserved like a time capsule. Tom, the manager of our faucility, is always helpful and friendly. Definitely picked the right place to store our stuff as it would be a huge hassle to have to move it again! ... Read more
Glenn R. - 24 November 2025
Needed a great quick storage solution spoke with Trevor B at Extra space storage. He was very helpful. Great customer service got everything wrapped up in a few minutes. it was great to work with someone who had a great attitude and was so helpful. ... Read more
Andrea J. - 20 November 2025
I definitely recommend these guys! The mangers & staff have been extremely helpful & accommodating to me. They do daily walk throughs and check on all the units. They are always reachable if I have needed help. The facility is clean & it a great location. They do a job here! ... Read more
Stefnie S. - 17 November 2025
My price went up from $159 to $290 in only two years (from 2023 to 2025). I called them up today and asked if they could provide me a current rate which is $236, they answered that the maximum they can do is $280 and asked if I want to give them a move out notice, I answered not yet - I'll do it myself later. They handed me a move out notice immediately, that's your customer service. As other folks mentioned, no available carts at least half of the time. I've seen at least one homeless person hanging out in his unit every day, my family was afraid to come there because of that. Questionable experience tbh for this amount of money. ... Read more
Andrey - 9 October 2025
Worked with Justin. Excellent job with all the details and explanations to help me make the right choice for our storage needs. Felt very comfortable and look forward to a good experience with Extra Storage. ... Read more
coxjrray - 3 October 2025
Excellent customer service Terry and Mark went above and beyond to help me with all my needs and requests super clean facility easy on and off the freeway I left with a really safe feeling about leaving my belongings in a new strange place. I’m confident I made the right decision, and look forward to being here for the next year or so. Thank you ... Read more
Victor M. - 25 August 2025
I can’t say enough great things about working with Tom and Brian at the Irvine location. I had a few issues with payments and they both went out of their way to help reverse charges and make things right. Not only did they do that, but they made me feel so valued as a customer and person. They were so kind and always quick to respond. If you’re going to rent storage space, I highly recommend this facility. You will get top notch service and kindness! ... Read more
Lucy - 22 July 2025
I had almost finished signing up at home the day before. Tom left me a voicemail offering assistance if needed. I went in the next day and Tom was extremely helpful and patient while I took time to contact my insurance company to double check my preexisting renters insurance policy. Tom was friendly and professional. My experience there has thus far been top notch. ... Read more
Eric G. - 20 June 2025
I had a fantastic experience with this storage facility and would highly recommend it to anyone in need of a secure, clean, and well-run space. From start to finish, everything was smooth and professional. A special shoutout to Marco, who was absolutely amazing to deal with! He was friendly, knowledgeable, and went above and beyond to make the process easy and stress-free. It’s rare to come across someone who genuinely cares and takes the time to ensure you’re fully taken care of—Marco is that person. If you’re looking for reliable storage and top-tier customer service, look no further. Ask for Marco—you’ll be in great hands! ... Read more
Sherif H. - 2 June 2025
I rent a unit at Extra Space Storage on Oak Canyon in Irvine, and I just have to say—Tom is the reason I’ll always choose this company. He goes above and beyond every time. His customer service is amazing, he’s super patient, and always finds creative ways to solve any issue. You can really tell the team cares about making customers happy. I’ll be recommending Extra Space to all my friends! ... Read more
PortFlex - 3 April 2025
I had a great experience with Marco handling my storage unit. He was incredibly helpful, professional, and made the whole process so easy. His attention to detail and friendly attitude really stood out. Highly recommend his service! ... Read more
Neda K. - 20 March 2025
I had a great experience at Extra Space Storage! Tom, the store manager, and his team were incredibly helpful and welcoming. The facility is clean, well-maintained, and feels very safe, making it a perfect choice for anyone needing storage space for personal or business use. Highly recommend! Thank you (: ... Read more
shams k. - 19 March 2025
The process to begin leasing a unit was SO easy thanks to the representative, Marco, who called me and guided me throughout the whole process. He broke down the costs, what to expect, and made sure to follow up with me when I asked him to. Additionally, he helped me get a great price on my unit in comparison to other similar storage facilities near me. Thanks so much for your awesome customer service! ... Read more
Angelique - 10 March 2025
As a business owner, Extra Space Storage has been a pinnacle of support for my operations. From parking my equipment in their highly secure facility to storing work gear and inventory in their well-maintained units, they have consistently exceeded expectations. Tom, Ron, Dominic, Zack, Jesse, and the entire staff are top-notch—always professional, helpful, and attentive to customer needs. The facility is always very clean and tidy, including the bathrooms, which is a big plus. It’s also conveniently located near the 5 Freeway, making access incredibly easy. I’ve been with Extra Space for approximately two years, and I can confidently say this is the best storage facility for business equipment, vehicles, RVs, or personal belongings. If you’re looking for a dependable, secure storage solution, Extra Space is the place to be. Five stars all the way! ... Read more
Chase T. - 1 March 2025

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Storage units in nearby cities

Here is how Irvine, CA, compares to other nearby cities. Overall, there are many other great self storage opportunities in the area. Tustin, CA, is just 5 miles away and has 7 storage facilities. Monthly rents there start at $48. However, you could also drive to Lake Forest, CA, which is 6 miles away and which also offers storage units for as little as $50. Newport Beach, CA is also just 7 miles distant. Listings there show no less than 3 facilities, with unit prices starting from $109. Looking a bit further away, storage facilities in Aliso Viejo, CA, and Costa Mesa, CA, have multiple types of units available, with monthly costs starting at $78 and $23, respectively.

Storage units in Tustin, CA Within a 5-mile radius
7 Facilities
From $48/mo
Storage units in Lake Forest, CA Within a 6-mile radius
10 Facilities
From $50/mo
Storage units in Newport Beach, CA Within a 7-mile radius
3 Facilities
From $109/mo
Storage units in Aliso Viejo, CA Within a 8-mile radius
3 Facilities
From $78/mo
Storage units in Costa Mesa, CA Within a 9-mile radius
19 Facilities
From $23/mo
Storage units in Mission Viejo, CA Within a 9-mile radius
5 Facilities
From $51/mo
Storage units in Orange, CA Within a 10-mile radius
13 Facilities
From $22/mo
Storage units in Laguna Niguel, CA Within a 12-mile radius
1 Facility
From $74/mo
Storage units in Fullerton, CA Within a 17-mile radius
8 Facilities
From $34/mo
Storage units in Brea, CA Within a 18-mile radius
7 Facilities
From $39/mo
Storage units in Chino Hills, CA Within a 20-mile radius
2 Facilities
From $24/mo
Storage units in San Clemente, CA Within a 20-mile radius
4 Facilities
From $65/mo
Storage units in Cerritos, CA Within a 22-mile radius
3 Facilities
From $40/mo
Storage units in Chino, CA Within a 23-mile radius
6 Facilities
From $29/mo
Storage units in Lakewood, CA Within a 24-mile radius
5 Facilities
From $30/mo
Storage units in Lake Elsinore, CA Within a 24-mile radius
8 Facilities
From $28/mo
Storage units in Long Beach, CA Within a 25-mile radius
27 Facilities
From $33/mo
Storage units in Pomona, CA Within a 27-mile radius
10 Facilities
From $30/mo
Storage units in Ontario, CA Within a 27-mile radius
14 Facilities
From $35/mo
Storage units in West Covina, CA Within a 28-mile radius
3 Facilities
From $89/mo

Check out storage units in trending cities

If you want to see how your city compares to others, you can start by checking out other facilities in trending cities. A wide array of storage units can be leased in Los Angeles, CA, San Diego, CA and San Jose, CA, where sizes and amenities may vary. Monthly rents for units in these cities are as low as $15 and $24, respectively.

Storage units in Los Angeles, CA
207 Facilities
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Storage units in San Diego, CA
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Storage units in San Jose, CA
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Storage units in San Francisco, CA
23 Facilities
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Storage units in Fresno, CA
41 Facilities
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Storage units in Sacramento, CA
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Storage units in Oakland, CA
20 Facilities
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Storage units in Bakersfield, CA
51 Facilities
From $25/mo
Storage units in Anaheim, CA
21 Facilities
From $46/mo
Storage units in Stockton, CA
36 Facilities
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Storage units in Riverside, CA
35 Facilities
From $23/mo
Storage units in Santa Ana, CA
19 Facilities
From $20/mo
Storage units in Chula Vista, CA
20 Facilities
From $55/mo
Storage units in Fremont, CA
14 Facilities
From $22/mo
Storage units in Modesto, CA
27 Facilities
From $35/mo
Storage units in Fontana, CA
18 Facilities
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From $37/mo
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17 Facilities
From $31/mo
Browse storage units in all California cities.

Frequently Asked Questions

Storage units available at Extra Space Storage - 21 Post Street include the following amenities: Climate-Controlled, Indoor, Drive-Up Access, Onsite Manager, Security Camera, Gate, Parking, Keyless Unit Access, Elevators, Multi-Level Storage, Online Payment and RV Storage. Depending on what you need to put away in storage, you can discover there are some things you absolutely need, so make sure you check with the facility manager that you'll find everything you need on site.

This particular storage facility provides self storage units of different sizes, ranging from 25 to 300 square feet. Space is not an issue! If you have more belongings to store, or simply bulkier items or even vehicles, you should go for larger storage units.

You already know how much stuff you need to put in self storage, so figuring out the unit size you need is the next step. Smaller units such as 5'x5' or 5'x10' spaces can usually be filled with the amount of items you would normally store in a closet: a few chairs and lamps, sports equipment, garden tools and some boxes.

Moving on to larger sizes, imagine the 10'x10' and 10'x15' units as similar to a bedroom or a living room – larger pieces of furniture, sturdier equipment and bicycles can fit here. Finally, a 10'x20' unit has enough space for the contents of a 3-bedroom house, while the larger 10'x30' space easily accommodates the contents of a loaded semi-truck.

Monthly prices for units offered by Extra Space Storage - 21 Post Street start from $41 and can go up to $652 for larger spaces.

Accessibility and quickness are key when it comes to storage, so drive-up storage units are generally regarded as very convenient. Pull your car right up to your storage space, load, unload, and you're good to go! However, if you're mostly storing temperature-sensitive items, you should rather consider indoor storage units.

Climate-controlled units maintain consistent temperatures and humidity levels all year round, making them perfect for all your sensitive items. Moisture and varying temperatures can damage a whole host of things, and that is why a lot of people choose to use climate-controlled units to store items like wooden furniture, electronics, artwork, documents and photographs, collectibles, antiques, etc. If the belongings you're storing are important to you, you should consider renting a climate-controlled unit.