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Building a Duplex, Dual Occupancy or Granny Flat
Maximise Your Property
Understanding the Difference Between a Duplex, Dual Occupancy and a Granny Flat
While these terms are often used interchangeably, they refer to different types of developments.
Duplex
A duplex consists of two separate homes. These can be attached or detached dwellings on a single block. Each home has its own entrance facing the road and may be strata-titled or Torrens-titled (depending on regulations).
Duplexes are popular for:
• Investors
• Multi-generational living
• Selling one dwelling and living in the other to help fund your build
Dual Occupancy or Secondary Dwelling
A dual occupancy home consists of two dwellings under the one roof line. The secondary dwelling is integrated to the side or rear of the home, with no visible entry from the front of the house and has no Strata Title.
Dual Occupancy is popular for:
• Investors
• Multi-generational living
Granny Flat
A granny flat is a small secondary dwelling built on the same block as an existing home. It may be detached or attached to the main house and has no Strata Title.
Granny flats are commonly used for:
• Elderly parents
• Adult children
• Rental income
Understanding the Difference Between a Duplex, Dual Occupancy and a Granny Flat
While these terms are often used interchangeably, they refer to different types of developments.
Duplex
A duplex consists of two separate homes. These can be attached or detached dwellings on a single block. Each home has its own entrance facing the road and may be strata-titled or Torrens-titled (depending on regulations).
Duplexes are popular for:
• Investors
• Multi-generational living
• Selling one dwelling and living in the other to help fund your build
Dual Occupancy or Secondary Dwelling
A dual occupancy home consists of two dwellings under the one roof line. The secondary dwelling is integrated to the side or rear of the home, with no visible entry from the front of the house and has no Strata Title.
Dual Occupancy is popular for:
• Investors
• Multi-generational living
Granny Flat
A granny flat is a small secondary dwelling built on the same block as an existing home. It may be detached or attached to the main house and has no Strata Title.
Granny flats are commonly used for:
• Elderly parents
• Adult children
• Rental income
Why Build a Duplex, Dual Occupancy or Granny Flat?
1. Increase Property Value
Adding an additional dwelling can significantly increase the overall value of your property by improving land utilisation.
2. Generate Rental Income
Secondary dwellings and granny flats offer an opportunity to earn ongoing rental income, helping to offset mortgage repayments or improve cash flow.
3. Flexible Living Options
Flexible living options support multi-generational families, enable independent living while maintaining close proximity, and provide ageing-in-place solutions, offering adaptability without sacrificing privacy.
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Key Design Considerations
Design is critical when building multiple dwellings on one block. Important factors include:
• Privacy between dwellings
• Separate access and parking
• Natural light and ventilation
• Noise management
• Outdoor space allocation
A well-designed project ensures each dwelling feels like a standalone home.
Planning, Zoning and Council Approval
Local planning controls determine what can be built on your land. Before proceeding, it’s important to consider:
• Zoning and land size requirements
• Setbacks
• Parking requirements
• Infrastructure and service connections
As an experienced builder, Perry Homes can help you select the right house design to ensure no costly delays.
Unlock your Property’s Potential
Duplexes, dual occupancies, and granny flats offer flexible, future-focused housing solutions that make the most of your land. Whether your goal is investment, family living, or long-term value, multi-dwelling developments can be a smart and rewarding choice when designed and built correctly.
Duplexes, Dual Occupancy or Granny Flat Building Questions
Learn from our frequently asked questions when building Duplexes, Dual Occupancy or Granny Flats.
What is the difference between a duplex, dual occupancy and granny flat?
Can Perry Homes build duplexes?
Can I build a duplex on my block of land?
What is a dual occupancy home?
Are duplexes good investment properties?
Can I build a granny flat with Perry Homes?
Do granny flats need council approval?
What should I consider before building a duplex or dual occupancy home?
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