Detached vs Attached Granny Flat — Which Is Better?
Detached: standalone building in backyard. All-in $150,000–$200,000. Complete privacy, higher rents ($20–$40/week premium), feels like independent dwelling.
Attached: built onto rear/side of existing house. All-in $120,000–$160,000. Saves $25,000–$45,000 (shared wall, shorter services). Better for elderly parent accommodation (proximity).
Planning Differences
Detached requires: 3m from main house, 0.9m sides, 3m rear, separate parking, more backyard space. Attached requires: no setback from main house, side/rear setbacks still apply, may share parking.
For blocks over 500 sqm, detached is preferred. Under 500 sqm, attached may be the only option.
Recommendation
For rental income: detached. Tenants want independence — complete visual and acoustic separation commands higher rent and lower vacancy. For family accommodation: attached. Elderly parents benefit from proximity and potential connecting door.
Contact Buildana for a free assessment.
