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Celtic Self Storage
Renting a storage unit is easy — getting the most out of it takes a bit of planning. This hands-on guide walks you through every practical step: figuring out the right size, packing your belongings properly, keeping your unit organised, understanding security features, and reading the fine print on your contract.
New to the concept of self storage? Start with our introduction to self storage in Warsaw for the big-picture overview.
What exactly is a storage unit?
A storage unit is a private, lockable room inside a self storage facility. You rent it exclusively — no one else stores items in your space, and no one else can enter it. Think of it as a personal mini-warehouse: cleaner and safer than a basement, more accessible than a garage, and available around the clock.
Units come in many sizes, from a space roughly the size of a wardrobe (1 m²) to rooms large enough to hold the contents of a three-bedroom house (15–20 m²). The walls and floor are typically concrete or steel, which keeps conditions dry and stable.
Choosing the right unit size
Picking the correct size is the single most important decision. Too small and you will struggle to fit everything in; too large and you are paying for empty air. Here is a detailed breakdown.
Extra-small units: 1–2 m²
Dimensions to picture: about the size of a large built-in wardrobe (1 m wide × 1 m deep × 2 m high for 1 m²) or a small walk-in closet (2 m²).
Typical contents:
- 20–40 standard moving boxes
- Seasonal sports equipment (skis, boards, kayaks)
- Seasonal clothing, ski gear, or snowboard bags
- A small document archive (filing cabinets, binders)
- Christmas decorations and holiday supplies
Best for: Students storing belongings over summer, individuals with a modest collection of seasonal items, small businesses archiving paperwork.
Cost at Celtic: From 169 PLN/month (Piaseczno 1 m²) or 170 PLN/month (Łomianki 2 m²).
Small units: 3–5 m²
Dimensions to picture: roughly the size of a small bathroom or large hallway (e.g. 1.5 m × 2.5 m).
Typical contents:
- Furniture from a studio or one-room apartment (sofa, bed frame, small table, chairs)
- 60–100 moving boxes
- A bicycle plus sports equipment
- Small household appliances (microwave, vacuum cleaner)
- A medium-sized business archive
Best for: People renovating a small apartment, families storing outgrown children's furniture, companies with moderate paperwork.
Planning a renovation or move? Our practical moving guide has a step-by-step timeline.
Medium units: 6–8 m²
Dimensions to picture: a small bedroom (2 m × 3.5 m) or walk-in storage room.
Typical contents:
- Furniture from a two-room apartment (sofa, wardrobe, dining table, bed, bookshelves)
- 100–140 boxes
- Large appliances (washing machine, fridge — see packing notes below)
- Garden furniture set
- Company equipment and seasonal retail stock
Best for: Families mid-renovation, office relocations, online sellers with growing inventory.
Large units: 10–15 m²
Dimensions to picture: a standard bedroom or small living room (3 m × 4 m to 3 m × 5 m).
Typical contents:
- Complete furnishings from a two- or three-bedroom apartment
- 150–200+ boxes
- Large appliances, mattresses, and garden tools
- Bulk e-commerce inventory
- Workshop or contractor tools and materials
Best for: Families moving between homes, businesses needing a full satellite warehouse, online stores scaling up for peak season.
Running an online shop from southern Warsaw? See how other e-commerce businesses near Mokotów and Wilanów use storage units.
Extra-large units: 15 m²+
Dimensions to picture: a large room or single-car garage.
Typical contents:
- Entire contents of a house
- 200+ boxes plus oversized items (pianos, gym equipment)
- Full office furniture suite
- Large commercial stock or contractor material
Best for: Long-distance relocations, estate clearances, businesses with significant inventory needs.
Still not sure? Use the unit finder
The fastest way to find your size is the Celtic unit finder. Select the items you plan to store and the tool recommends an optimal unit with an approximate monthly price.
Where to rent a storage unit in Warsaw
Celtic Self Storage has two facilities, each designed for a different part of the city.
Łomianki — northern Warsaw
Address: ul. Kolejowa 348, 05-092 Łomianki
Convenient for residents of Bielany, Żoliborz, Białołęka, and Tarchomin. The facility sits just off the E77/S7 bypass, so you avoid inner-city traffic entirely. A key advantage here is drive-in access — you can pull your car or van right up to the unit door, which makes unloading heavy furniture much easier.
- Unit sizes: 2–20 m²
- Prices from 170 PLN/month
- Free parking: 25 spaces
Read the detailed directions from Bielany, Żoliborz, and Białołęka or visit the Łomianki page.
Piaseczno — southern Warsaw
Address: ul. Kineskopowa 1, 05-500 Piaseczno
Ideal for Mokotów, Ursynów, Wilanów, Kabaty, and the broader Piaseczno area. The 2023-built facility features a freight elevator, which is a major plus if you are storing heavy items on upper floors. Climate-controlled units are also available here — important for sensitive belongings like electronics, artwork, or leather furniture.
- Unit sizes: 1–15 m²
- Prices from 169 PLN/month
- Free parking: 40 spaces
See how to reach Celtic Piaseczno from Mokotów, Ursynów, and Wilanów, or visit the Piaseczno page.
Packing your belongings: a detailed checklist
Good packing protects your items and lets you fit more into the unit. Poor packing leads to crushed boxes, scratched surfaces, and wasted space. Here is how to do it right.
Boxes and containers
- Use uniform box sizes. Standard moving boxes (roughly 60 × 40 × 40 cm) stack neatly and form stable columns. Mismatched boxes create gaps and wobble.
- Reinforce the bottom. Run an extra strip of packing tape across the base of every box — especially heavy ones (books, tools, kitchenware).
- Do not overfill. A box you cannot lift is a box that will get dropped. Keep each one under 15–20 kg.
- Fill empty space. Stuff gaps with crumpled packing paper or old towels. This stops contents shifting during transport and stacking.
Labelling system
A few minutes of labelling saves hours of searching later. Use this three-part system on every box:
- Contents summary: "Kitchen — pots, pans, small appliances"
- Room of origin: Helps when you unpack at a new home
- Handling note: "FRAGILE," "THIS SIDE UP," or "OPEN FIRST"
Number each box (1/25, 2/25 …) and keep a master list — either on paper or in a notes app on your phone. Photograph the list and store it in the cloud so you always have access.
Wrapping and protecting
| Item type | Recommended protection |
|---|---|
| Glasses, dishes, vases | Individual wrapping in packing paper, upright in box with dividers |
| Mirrors, framed art | Corner protectors + bubble wrap, stored vertically (never flat) |
| Wooden furniture | Furniture blankets or old bedsheets to prevent scratches |
| Leather sofas, chairs | Breathable fabric covers (avoid plastic — it traps moisture) |
| Electronics | Original packaging if available; otherwise anti-static bubble wrap |
| Mattresses | Mattress bags to keep out dust and moisture |
| Clothing | Wardrobe boxes for hanging items; vacuum bags for bulky winter coats |
Disassembling furniture
Taking furniture apart before storage saves a remarkable amount of space — up to 60 percent in some cases. Remove table legs, detach bed frames, take shelves out of bookcases. Keep all screws, bolts, and Allen keys in a labelled zip-lock bag taped to the corresponding piece of furniture. Photograph each item before disassembly so you remember how it goes back together.
Appliance preparation
- Fridge/freezer: Defrost completely, clean inside, leave the door slightly ajar in storage to prevent mould.
- Washing machine: Run an empty hot cycle, drain all water from the drum and hoses, secure the drum with transit bolts if you still have them.
- Small appliances: Wrap cords around the body and secure with a rubber band or Velcro strap.
Organising your unit for easy access
A well-organised unit means you can find what you need without unpacking half the room. Follow these principles:
Create a floor plan
Before loading, sketch a rough layout. Place the items you will need most often near the door, and put long-term storage items against the back wall.
Build a central corridor
Leave a path roughly 50–60 cm wide running from the door toward the back. This lets you reach items on both sides without moving heavy boxes out of the way.
Stack strategically
- Heaviest boxes on the bottom, lightest on top
- Keep box labels facing the corridor so you can read them
- Do not stack higher than you can safely reach (about 1.8 m for most people)
- Place fragile items on upper shelves or on top of stable stacks — never at the bottom
Use vertical space
Freestanding shelving units (metal utility shelves work well) let you use the full height of the unit without stacking boxes precariously. They also improve airflow around your belongings.
Furniture as storage
Think of large furniture pieces as storage containers themselves. Fill dresser drawers with small items, put boxes inside wardrobes, and slide flat items (mirrors, paintings) between mattresses and walls.
Want to see what a well-organised unit looks like? Take a look at our virtual tour of the Łomianki facility.
Security features to look for
Your belongings are only as safe as the facility protecting them. Here is what a professional storage unit should offer:
Surveillance
Look for a facility with CCTV cameras covering all corridors, entry points, and parking areas. Recordings should be stored for at least 30 days. At Celtic Self Storage, monitoring runs 24 hours a day in real time.
Access control
Every entry should be logged electronically. PIN codes or magnetic cards ensure that only registered customers can enter the building. Avoid facilities that rely solely on a shared padlock on the front gate.
Alarm integration
Motion sensors and alarm systems add a second layer of defence. At well-run facilities, alarms trigger instant notifications to management and, where applicable, a direct link to a security response company.
Insurance
Facility insurance covering fire, flooding, and break-in should be included in the base price. If you are storing high-value items (electronics, collectibles, professional equipment), ask about supplementary contents insurance. It typically costs a modest monthly premium and gives you peace of mind.
Understanding your contract
Before you sign, make sure you are comfortable with these terms:
Minimum rental period
The industry standard is one month. Be cautious of providers who require three-, six-, or twelve-month commitments — you may end up paying for months you do not need.
Notice period
At Celtic Self Storage, termination requires one month's notice. If you finish earlier, unused rent is refunded.
What is included in the price
A transparent operator bundles everything into one monthly fee: unit rental, 24/7 access, CCTV monitoring, lighting, and parking. If you see separate line items for "administration," "access cards," or "insurance surcharges," ask for a fully loaded quote before comparing.
Discounts for longer stays
If you know you will need the unit for an extended period, longer commitments often come with lower rates:
- 3 months: approximately 5% off
- 6 months: approximately 10% off
- 12 months: approximately 15% off
Check the current pricing page for exact figures.
Changing unit size
Needs change. If you realise your unit is too small (or too large), most operators — including Celtic — let you switch to a different size at no extra charge, subject to availability.
Storage units for businesses
Businesses account for a significant share of storage unit rentals in Warsaw. Two use cases dominate:
Document archiving
Polish regulations require companies to keep financial and HR documents for five to ten years. Renting office space for paper archives is expensive — storage units offer 70–80 percent savings while still providing dry conditions, controlled access, and GDPR-compliant privacy.
Read more about business document archiving at Celtic Łomianki.
E-commerce fulfilment
Online sellers need flexible warehouse space that can scale with demand. A storage unit gives you 24/7 access to pack and ship orders, a professional address, and the ability to upgrade or downgrade your space as your catalogue grows. Learn from southern Warsaw e-commerce businesses who already use this model.
Frequently asked questions
For the full list, visit our FAQ page. Here are the questions we hear most often about units specifically:
Can I share a unit with someone? No. Each unit is rented exclusively to one person or company to ensure security and accountability.
Do I need my own padlock? You can bring your own or buy one at the facility (typically 20–50 PLN). Using your own padlock means only you hold the key.
Can I change unit size after signing? Yes, subject to availability. There is no fee for switching.
Are there hidden fees? No. The monthly price covers everything — access, monitoring, lighting, and parking.
What can I not store? Hazardous or flammable substances, perishable food, live animals, and anything illegal. Most everyday belongings — furniture, documents, electronics, sports gear, business stock — are perfectly fine.
What happens if I need to leave earlier than planned? Give one month's notice and any prepaid rent for unused time will be refunded.
Summary: getting the most out of your storage unit
A storage unit is only as useful as the thought you put into choosing, packing, and organising it. Pick the right size (use the unit finder if unsure), pack methodically, label everything, and maintain a walkable corridor inside the unit. Choose a facility with transparent pricing, genuine 24/7 access, and robust security — and read the contract before you sign.
Celtic Self Storage offers units at two Warsaw-area locations:
- Łomianki (ul. Kolejowa 348) — drive-in access, ideal for northern Warsaw
- Piaseczno (ul. Kineskopowa 1) — freight elevator and climate control, ideal for southern Warsaw
Ready to get started?
Learn more about Celtic Self Storage and why thousands of Warsaw residents trust us with their belongings.
Have questions? Check our FAQ or contact us.
