What Size Storage Unit Do I Need?

Choosing the right self storage unit size is essential. If it is too small you risk cramming and damaging your belongings. If it is too big you are paying for space you do not use. At Roomia, we help you get it just right.

Australia has over 2,800 self storage facilities (SSAA, 2024) and 81% of Australians are already familiar with how self storage works. Still, 19% of Australians are unsure about the process and one of the most common questions is about unit size.

Whether you are moving house (the top reason for using self storage at 33%), decluttering (19%), or simply short on space at home (29%), our step-by-step guide will help you choose the perfect size.

Step 1: Make a List of What You Are Storing

Start with an inventory of all large items, then add boxes and smaller possessions. This list will help you measure accurately and avoid paying for unnecessary space.

Ever wondered what people store in a storage unit?  The top three categories that people store are:

1. Household items and furniture – 66%
2. Sentimental belongings – 39%
3. Garage or shed items – 30%

Step 2: Measure Your Items

Use a tape measure to record the length, width, and height of each large item. For irregular shapes, such as a round dining table, measure the widest points.

Having trouble visualising how much space you need?  Mark the measurements on your garage floor with masking tape to visualise the unit size.

Step 3: Use Our Space Calculator

Our easy online tool allows you to select common reasons for needing storage or the approximate number of items you have and see exactly what size unit will fit them.

It also helps you plan for efficient stacking which can reduce the floor space you need.

Step 4: Match to Common Storage Sizes

Step 5: Think About Access and Duration

According to SSAA research, 66% of customers store for less than one year, and 61% of personal storage users visit monthly or more. If you will need regular access, leave space for aisles or shelving inside the unit.

Step 6: Factor in the Decision Drivers

The top factors Australians consider when choosing a facility are:

• Price
• Location
• Access hours
• Security features

Roomia’s facilities are designed with these in mind, with 24-hour access available along with friendly on-site teams to make your experience simple and stress-free.

Step 7: Book Online for Convenience

With 77% of future customers prioritising the ability to book online, Roomia makes securing your space easy. You can search locations, compare unit sizes, view our transparent pricing and reserve online anytime.

Find a Roomia facility near you

Quick Reference: How Much Space Do I Need?

• 1 bedroom home – around 6m²
• 2 bedroom home – 7.5m² to 9m²
• 3 bedroom home – 10m² to 15m²
• 4 bedroom home – 18m² or more

Final Word

The right-sized self storage unit keeps your items safe, accessible, and cost-effective. By making an inventory, measuring carefully, and using our Space Calculator, you can avoid paying for more than you need while ensuring everything fits.

If you aren’t sure or would like to verify your size estimate, give our team a call – we’d only be too happy to help.

Whether you are storing for a few weeks or over a year, Roomia is here to make your life easier and your space Roomia!