Choosing the wrong storage unit size is one of the most common — and costly — mistakes renters make. Rent too small and you can't fit everything. Rent too large and you're paying for empty space every month. This guide gives you a precise framework for calculating exactly how much storage space you need, based on what you're storing and why.
Storage Unit Size Comparison Chart
| Unit Size | Best For | What Fits | Monthly Price (ON) |
|---|---|---|---|
| 5×5 (25 sq ft) | Studio apartment extras, seasonal items, small furniture | Boxes, small dresser, TV, bike, holiday decorations | $49–$79 |
| 5×10 (50 sq ft) | 1-bedroom apartment contents, college dorm move-out | Mattress set, sofa, boxes, appliances, desk | $69–$109 |
| 10×10 (100 sq ft) | 2-bedroom home, office contents, renovation storage | Full living room set, bedroom furniture, appliances, 20+ boxes | $99–$149 |
| 10×15 (150 sq ft) | 2–3 bedroom home, large furniture, business inventory | Multiple bedroom sets, dining room, appliances, 30+ boxes | $129–$179 |
| 10×20 (200 sq ft) | 3–4 bedroom home, vehicle storage, contractor equipment | Full 3-bedroom house contents, car, truck, boat | $159–$229 |
| 10×30 (300 sq ft) | 4–5 bedroom home, large business inventory, multiple vehicles | Everything from a large home plus a vehicle | $229–$299 |
*Prices are estimates for Ontario facilities as of 2026. Climate-controlled units cost 25–50% more.
Room-by-Room Storage Checklist
Use this checklist to inventory what you're storing. Add up the estimated square footage to find your ideal unit size.
Living Room
~40 sq ft- ✓Sofa (3-seater)
- ✓Loveseat or armchair
- ✓Coffee table
- ✓TV stand + TV
- ✓Bookshelf
- ✓Lamps (2–3)
- ✓Rugs
- ✓Boxes of décor
Master Bedroom
~35 sq ft- ✓King/Queen bed frame + mattress
- ✓Dresser
- ✓Nightstands (2)
- ✓Wardrobe or armoire
- ✓Boxes of clothing
Second Bedroom
~20 sq ft- ✓Twin/Double bed
- ✓Dresser
- ✓Desk + chair
- ✓Boxes
Kitchen
~15 sq ft- ✓Small appliances (microwave, toaster, etc.)
- ✓Boxes of dishes, pots, pantry items
Dining Room
~20 sq ft- ✓Dining table (6-seat)
- ✓Chairs (6)
- ✓China cabinet or buffet
Home Office
~15 sq ft- ✓Desk
- ✓Office chair
- ✓Filing cabinets
- ✓Boxes of documents
Garage / Basement
~30 sq ft- ✓Tools and equipment
- ✓Seasonal items
- ✓Sports gear
- ✓Boxes
How to Calculate Your Storage Needs
List every item you plan to store
Go room by room. Include furniture, boxes, appliances, and seasonal items. Don't forget garage and basement contents.
Estimate total cubic footage
Multiply the length × width × height of large items. For boxes, a standard moving box is about 1.5 cubic feet. Add 20% for walkways.
Match to a unit size
Use the comparison chart above. If you're between sizes, always go one size up — the price difference is small and the convenience is significant.
Consider access frequency
If you'll access your unit weekly, leave more aisle space. If it's long-term storage, you can pack more densely and use a smaller unit.
Factor in climate control needs
If storing electronics, wood furniture, or documents, you may need a climate-controlled unit. These are typically only available in certain sizes at each facility.
Pro Tips for Maximizing Your Storage Space
- →Disassemble furniture (bed frames, tables, shelving) to save significant space.
- →Use vertical space — stack boxes to the ceiling and use shelving units.
- →Store heavy items in small boxes; light items (pillows, linens) in large boxes.
- →Place items you'll need to access at the front of the unit.
- →Wrap fragile items in clothing or linens instead of buying extra bubble wrap.
- →Label every box on the side (not the top) so you can read labels when stacked.
- →Leave a centre aisle for access if you're storing long-term.
Frequently Asked Questions
What is the most common storage unit size?
10×10 is the most commonly rented storage unit size in Ontario. It holds the contents of a 2-bedroom apartment and is large enough for most household moves and renovations.
How do I estimate how much storage space I need?
Walk through each room and list every item you plan to store. Use our room-by-room checklist above to estimate square footage. Add 20% buffer space for walkways and stacking. When in doubt, size up — it's cheaper than renting a second unit.
Can I fit a king-size bed in a 5×10 storage unit?
Yes, a king-size mattress (76" × 80") fits in a 5×10 unit when stored vertically. However, you'll have limited room for other furniture. A 10×10 is recommended if you're storing a full bedroom set.
What size storage unit do I need for a 2-bedroom apartment?
A 10×10 unit (100 sq ft) is typically sufficient for a 2-bedroom apartment. If you have large furniture or a lot of boxes, consider a 10×15.
Is it better to rent a larger storage unit than I need?
Slightly, yes. Renting one size up gives you room to organize, stack properly, and access items without unpacking everything. The price difference between adjacent sizes is usually $20–$40/month.
Do storage facilities in Ontario charge by square foot?
Storage units are priced by unit size (e.g., 5×10, 10×10), not per square foot. Prices vary by location, facility amenities, and whether climate control is included.
Related Storage Guides
Storage Unit Size Guide
Visual breakdown of every unit size with what fits inside.
Climate Controlled Storage Explained
When you need it and what it costs.
Storage Costs in Toronto (2026)
Current pricing data for Toronto storage units.
Best Storage Units in Brampton
Top-rated facilities with pricing and features.
Ready to Find Your Storage Unit?
Compare storage units across Ontario — filter by size, price, and features.
Browse Storage Units