Granny Flat ROI Calculator

Granny flats in Western Sydney typically achieve 8–12% gross yield on construction cost alone. Net yields after expenses are usually 6–9%. Payback periods range from 5–8 years depending on build cost and rental income.

A well-built granny flat typically adds $150,000–$250,000 to your property value in Western Sydney, depending on the LGA, size, and finish quality. This often exceeds the construction cost, creating immediate equity.

Yes. Under NSW planning law (Housing SEPP 2021), you can legally rent a granny flat to any tenant — there is no requirement for them to be a family member. Rental income from a granny flat is taxable.

A 1-bedroom granny flat (35–40sqm) with standard finishes starts from $140,000–$180,000 in Western Sydney. Two-bedroom flats (50–60sqm) cost $180,000–$260,000. All Buildana granny flat builds are fixed-price.

Yes. Buildana (Lic. 487805C) provides free site assessments for granny flat projects. We check CDC eligibility, estimate build costs, and project rental returns — so you know the numbers before committing.