Granny Flat Size Limits in NSW — Maximising Your 60 sqm
The maximum internal floor area for a granny flat in NSW is 60 sqm. This is set by the SEPP and applies across all councils. Buildana (Lic. 487805C) designs every granny flat to maximise livability within this limit.
What Counts Toward the 60 sqm
Counts: Bedrooms, living/dining, kitchen, bathroom, laundry, hallway, storage, enclosed entry. Excluded: Covered verandah/patio (if open on one side), uncovered outdoor areas, car parking, garden shed.
Design strategy: build covered alfresco that extends living space without consuming the 60 sqm. A 60 sqm granny flat with a 12 sqm covered alfresco feels much larger than 60 sqm.
Typical Floor Plans
Studio (35–40 sqm): combined living/sleeping, kitchen, bathroom. Best for singles or elderly parents. 1-bed (40–50 sqm): separate bedroom, open plan living/kitchen, bathroom. Best for couples. 2-bed (55–60 sqm): two bedrooms, open plan living/kitchen, bathroom. Best for families, sharers, maximum rental income.
The 2-bed at 60 sqm is our most popular. For the configuration comparison, see our granny flat studio vs 1-bed vs 2-bed guide.
