Phone # (425) 432-7443
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  • Video surveillance
  • Gated & lighted facility
  • 5-10 access 7 days a week
  • RV and boat parking
  • Truck available for rent
  • Packing supplies available
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Office Hours

Mon-Fri: 9am-6pm
Saturday: 9am-5pm

Access Hours*

Mon-Sun: 5am-10pm
*(Extended access hours available upon request)


Phone: (425) 432-7443

Address: 26039 Maple Valley Black Diamond Rd SE, Maple Valley, WA 98038

Our Unit Sizes

5x5 unit size

5x5What fits inside?

This size unit yields 25 square feet of space. Although these 5x5 units are small, they are an excellent size to store all of your extra items, like garden tools, seasonal items, office supplies, or your miscellaneous boxes.

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5x10What fits inside?

This size unit yields approximately 50 square feet of space, perfect for storing an entire bedroom or office.

Space Estimator
10x10 unit size

10x10What fits inside?

Did you just buy a new house and need to move out of your small apartment, but the house is still being built? This 100 square foot unit should hold all your items! It is ideal for storing an entire living room and two full bedrooms.

Space Estimator

10x15What fits inside?

With 150 square feet of space, this large unit can typically store the contents of 3 bedrooms. This space is also ideal for larger items like televisions, pianos, couches, or tables. Since each household is different, it may not apply to every situation.

Space Estimator
10x20 unit size

10x20What fits inside?

In-between homes and need to store all of your family’s belongings? This is the perfect space for you, capacitating roughly 5 bedrooms, and larger items like washers, dryers and refrigerators. Since each household is different, it may not apply to every situation.

Space Estimator

About Us

Maple Valley Mini Storage is one of the largest indoor/outdoor secure self storage facilities in King County, WA.

Located in the center of Maple Valley city, our location is conveniently located on the Maple Valley Hwy.

We offer storage solutions to meet a variety of storage needs including indoor storage units and convenient drive-up access units for your moving truck. Moving trucks can pull directly up to your door for added moving convenience.

Our spacious outdoor storage can accommodate vehicles up to 45' in length. There is ample driving space for your vehicles. Additionally, we utilize a combination of video surveillance and personal dedication to provide secure storage facilities to our clients. Moving trucks and packing supplies are available on site.

RV Storage and RV Parking
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