What Size Storage Unit for a 3 Bedroom House? (2026 Guide)

The short answer

For a typical 3 bedroom house, most renters usually need a 10x20 storage unit.In some cases, a heavily furnished home or one with garage and patio items may need even more space, while a lightly furnished house may fit into a 10x15 if packed very efficiently.For most people, though, 10x20 is the safer starting point when storing the contents of a 3 bedroom house.

When a 10x15 unit may be enough

A 10x15 unit may work if the house has:• Less furniture than average• Fewer large appliances• Limited garage items• No patio furniture• A smaller number of boxes• Very efficient packing with disassembled furnitureThis is more common when you are only storing part of the home’s contents, not everything.

Why a 10x20 is usually the better fit

A 10x20 unit is usually large enough for the contents of a multi-bedroom home, including:• Multiple mattress sets• Couches and chairs• Dining table and chairs• Dressers• Desks• Bookshelves• Major appliances• Many medium and large moving boxes• Household overflow from several roomsThat is why 10x20 is often the standard recommendation for a full 3 bedroom move.

What usually pushes people beyond a 10x20

A 10x20 can still feel tight if the house includes:• Oversized sectionals• Very large dining sets• A lot of garage equipment• Patio furniture• Workshop tools• Too many bulky boxes packed looselyIf you are storing the contents of a larger house plus garage and outdoor items, you may need more room than expected.

What a 3 bedroom house storage unit usually costs

In many markets, the sizes most often used for a 3 bedroom house cost roughly:• 10x15 unit: $140 to $240 per month
• 10x20 unit: $180 to $320 per month
The real long-term cost can be higher once insurance, admin fees, and future price increases are added.

How to choose the right size

The most accurate way to choose between a 10x15 and a 10x20 is to focus on your largest furniture first.Ask yourself:• How many bedroom sets are going in storage?• Are you storing appliances too?• Do you have garage or patio items?• How many total boxes will you have?If you are anywhere close to the limit, the larger unit is often worth it.

Helpful tools and guides

If you are not sure what storage size you need, start with the size finder.

If you want to estimate the real monthly cost of your storage unit, including fees and possible future increases, use the calculator.

These related guides may also help.

If you want help comparing real storage options

If you want help comparing storage facilities based on long-term pricing behavior, hidden fees, and overall risk, visit Storage Scout.