Mercer Island Self Storage

If you’re tired of the traditional self-storage drill—renting a truck, driving back and forth, loading and unloading in a rush—PortaBox Storage offers a better way. We bring secure, weather-resistant storage containers directly to your Mercer Island home or business. You pack on your schedule. We pick it up and store it in a secure, climate-controlled facility. When you need your belongings again, we return them—on your terms. This isn’t just Mercer Island storage. It’s control, convenience, and peace of mind, all delivered to your door. Don’t move your stuff. Call us and let PortaBox move your storage.

A storage experience tailored to Mercer Island

Mercer Island residents lead active, dynamic lives. Many balance busy careers, grow families, or manage major life transitions. Storage needs often arise during renovations, downsizing, estate planning, or office expansions. PortaBox is explicitly built to handle those moments, offering a hassle-free alternative to traditional self-storage.

Rather than wasting weekends with moving trucks and stressful logistics, you can focus on what matters most while we handle the rest. Get a custom estimate based on your space, schedule, and location—no commitments required.

What makes PortaBox different?

Portabox isn’t just a container rental—it’s a full-service storage solution designed to remove friction from every step of the process. Instead of forcing you to adjust to a facility’s rules, hours, and limitations, we bring the service to your home or business. Our containers are delivered at ground level, making them easy to load.

Once packed, they’re picked up and stored in secure, climate-controlled warehouses—not left outdoors like traditional pods. What truly separates PortaBox is the flexibility. You decide when to pack your Mercer Island storage unit, how long to store, and when to retrieve. We adapt to your timeline, not the other way around.

How the process works

Getting started with PortaBox is designed to be as effortless as the service itself. From your first interaction to the moment your container is safely stored, every step is built around clarity, convenience, and control.

Delivery to your location

Once you schedule service, we bring the right number of residential storage units to your driveway or commercial site. Each PortaBox unit is compact enough for residential streets but spacious enough for furniture, boxes, and equipment.

Packing at your pace

Take as much time as you need to pack your items. There are no deadlines, no rush, and no penalties for working around your schedule. Many customers appreciate this flexibility during chaotic life transitions or phased moves.

Pickup and secure storage

When you’re ready, we return to collect the containers and transport them to our controlled-access facility. Inside, your belongings are shielded from weather, temperature changes, pests, and dust.

Access or redelivery

Want something back? Request redelivery to your home, office, or new address. You can also access the containers by appointment at the facility if needed. And this system works whether you’re storing items short-term during a renovation or long-term while relocating across the region.

PortaBox use cases that matter

Mercer Island residents turn to Portabox in a variety of real-life situations. Our flexible model supports both individual and business needs with efficiency and ease.

Residential storage during renovations

When remodeling a kitchen, replacing floors, or updating your home, the last thing you need is clutter getting in the way. PortaBox provides a clean, secure space to store furniture, appliances, and personal items off-site while work is underway.

Moving or downsizing

If you’re in between homes or transitioning to a smaller space, portabox makes it easy to manage your move in stages. Pack when it’s convenient, and store what doesn’t fit until you’re ready. The staged approach is especially helpful when coordinating closings or dealing with estate transitions.

Business & office storage

Mercer Island’s professionals and small businesses use our business inventory storage solutions to store documents, surplus equipment, seasonal displays, and inventory. Mercer Island storage container is an ideal option for law offices, designers, consultants, and contractors needing extra space without committing to commercial leases.

College & student storage

For families with students at nearby universities, PortaBox is a smart solution during summer break or study abroad periods. Containers are delivered directly to the home, packed with school supplies and dorm furnishings, and stored until needed again.

PortaBox container specifications

Each PortaBox container is built for both durability and usability. Designed to withstand the Pacific Northwest’s varied climate, they offer protection without requiring any added coverage or preparation:

• Interior dimensions: 4′ 6″ wide × 7′ 6″ deep × 7′ high
• Exterior dimensions: 5′ wide × 8′ deep × 7′ 6″ high
• Capacity: approximately 240 cubic feet or up to 2,000 pounds

A single container holds the contents of a typical room. If more space is needed, additional units can be ordered and delivered. You only pay for what you actually use. Ready to simplify your storage? Reserve a container and choose your preferred delivery date today!

Security and climate-controlled storage

After pickup, your Mercer Island storage containers are transported to a secure facility specifically designed for long-term protection. Unlike open-lot storage solutions, PortaBox warehouses are fully enclosed, temperature-regulated, and continuously monitored.

It protects your belongings from:

• Humidity and moisture damage
• Mold, mildew, and pests
• UV exposure and extreme temperatures
• Unauthorized access and tampering

All containers remain sealed until you request access or redelivery, giving you total confidence in the safety of your stored items.

Seamless, transparent pricing

Storage should make your life simpler, not add confusion. That’s why PortaBox offers clear, competitive pricing without surprise fees. Rates are based on the number of containers, duration of storage, and selected services such as delivery, pickup, or redelivery.

There are no fuel surcharges, stair fees, or access costs. So whether you need storage for a month or over a year, our team works with you to create a custom plan that fits your budget and schedule.

Alice K.

Wow, PortaBox saved the day. We were in the middle of the holidays and expecting house guests when my husband received a shipment of samples from his company that literally filled our extra bedroom. (Don’t ask about the garage.) So we jumped online and ordered your box to clean out the room until the holidays were over. Next we’re going to clean out the garage.

Amy & Rob R.

Our daughter the “packrat” just left for college and we’re turning her room into an office. But, we can’t part with her furniture and collection of girl stuff. PortaBoxes annual program was very affordable so we decided to save it for her until she starts her own family. A little sappy, but what can I say! They’re only young once.

Local service with regional reach

Although PortaBox serves customers throughout the Puget Sound region, Mercer Island remains one of our most valued communities. Our logistics team understands the local layout, traffic patterns, and neighborhood access requirements, allowing us to efficiently serve every island corner.

With facilities strategically located for quick transport, we ensure fast turnaround times, responsive service, and peace of mind for every customer.

A better storage experience for Mercer Island

Storage should never add stress to your life. With PortaBox, Mercer Island storage for residents and businesses is a smarter, more convenient way to manage belongings. From the moment your container arrives at your door to the day your items are returned, every part of the process is designed to save time, reduce effort, and provide peace of mind.

There’s no need to drive across town, rent a truck, or wrestle with rigid storage contracts. PortaBox brings everything you need right to your doorstep and takes care of the rest. So contact us today and discover why PortaBox is Mercer Island’s most trusted name in portable self-storage—and experience storage that truly moves with you.