Find a Space

Post Alley Storage

Pioneer Square

Find a Space


Post Alley Storage offers 300+ self storage units with a large variety of sizes.

Unit Size Similar To Will Hold What Can I Store?
50 sq. ft. Apartment bathroom Contents of a 5 x 8 trailer or contents of a pickup truck A small walk-in closet, small furniture, skis, etc.
100 sq. ft. Small bedroom Contents of a 15 ft moving van This is good for an efficiency apartment

Please note that the above are guidelines for estimation purposes only. The size of the storage unit you need depends on the specific items you are storing. This list is only a representation of the storage unit sizes offered by Post Alley Storage. We recommend you visit our facility to determine which of our units will best serve your storage needs.



Store items you’ll need most often at the front of the unit.
When you pack your storage unit, create a center aisle for access to all items.
If you’re storing tables and other furniture, remove legs and store tabletops and sofas on end, to save space.
Pack books flat, not standing on end (which may cause damage to the spines). Books are extremely heavy, so don’t pack too many in one box.
Old photographs tend to curl over time. To keep them flat, place them between two pieces of cardboard and tape them together.
Never over-pack boxes. Overfilled boxes may rupture and topple when stacked.
Clean and dry appliances. Keep refrigerator doors slightly ajar and use the space inside these items for additional storage.
Use furniture drawers for small and delicate items. Bubble wrap and packing paper are excellent for these purposes.
When packing toys or smaller objects, remember to fill boxes completely, stuffing open areas with plain newspaper to prevent collapsing when stacked.
Common sense and state laws determine what may be stored. You alone control access to your storage space. Live animals, perishables, liquids, explosives, flammable liquids and fuels, toxic materials, or other items that need a controlled environment are NOT permitted.
Always use high quality locks on your unit. Locks are available for sale. Just ask your site manager for a recommendation.
Use trashcans to store shovels, hoes and rakes.
Mattresses should be covered and stored flat on level surfaces.
Use protective covers and treat wood surfaces before storing.

Seahawk 12th Man Special

Pay your first month of storage and receive your second month for only $12.


For new storage customers. Can’t be combined with other offers.

888 Western Ave Seattle, WA 98104
(The Leasing Office is in Griffis Seattle Waterfront at 888 Western Ave, Seattle, WA 98104)


Office Hours:
Mon – Fri: 9am thru 5pm
No Storage Tours on weekends

Access Hours:
7 days a week – including holidays!
6am – 9pm