Should a Growing Melbourne Family Choose a Double Storey Extension?

Growing families often reach a point where the existing home no longer provides enough bedrooms, bathrooms, storage or separation between living areas.

A double storey extension can solve that problem without requiring a move, but it is worth deciding whether building upward is genuinely the right solution for your family and property.

When a Double Storey Extension Can Make Sense

Building upward can be a strong option when you need substantial additional space but want to retain more of the backyard and remain in the same neighbourhood.

It is particularly useful when the upper floor can accommodate bedrooms, bathrooms or a retreat while the ground floor remains focused on shared family spaces.

Think About the Rooms You Actually Need

Before deciding on the size of the extension, list the problems the current home needs to solve.

Common priorities include:

• additional children’s bedrooms
• a parents’ retreat or ensuite
• a second family living area
• a home office or study
• more storage
• better separation between quiet and active areas

The design should respond to those needs rather than simply maximise floor area.

Consider Whether You Want to Keep the Backyard

If outdoor area is already limited, extending upward can preserve more garden and entertaining space than a large ground-floor addition.

See our guide to adding a double storey extension without losing your garden.

Compare Extending With Moving

Remaining in the current home may preserve school routines, transport, neighbours and the parts of the property you already like.

Moving may still be the better option if the existing structure, site constraints or required level of renovation make the project impractical. The decision should be based on the whole property and long-term family plan.

Plan for How the Family Will Use Both Floors

The best family layouts create clear relationships between bedrooms, bathrooms, retreats, living areas and the staircase.

For example, younger children may need bedrooms close to parents, while teenagers may benefit from more separation and their own retreat.

Think About Future Flexibility

Family needs continue to change after the extension is completed. A study may become a bedroom, a retreat may become a work area, or a guest room may later accommodate an older family member.

Understand the Disruption Before You Start

Second storey construction can involve roof removal, structural strengthening, temporary weather protection and periods where parts of the home are difficult to use.

Whether the family can remain in the house during construction depends on the scope and sequencing of the individual project.

Check Feasibility Before Falling in Love With a Design

The existing structure, staircase options, planning controls and project budget should be tested before detailed design work progresses too far.

Our double storey extension planning guide explains the process in more detail.

Ready to Assess Your Own Home?

Cameron Construction manages design, engineering, approvals and construction for double and second storey extensions across Melbourne.