What are the best suburbs for granny flats in SEQ?

The best SEQ suburbs for granny-flat / secondary-dwelling yield share three traits: a permissive council code, deeper lots (typically 600m²+) that fit a secondary on without compromising the main dwelling, and rental demand that supports separate-tenancy income.

Moreton Bay growth corridor (Caboolture, Burpengary, Morayfield, Kallangur) — Moreton Bay's ~90m² Accepted threshold is the most permissive in SEQ; the deeper estate lots routinely fit a separate-access secondary; rental demand from the growth corridor's commuter workforce is reliable. Indicative gross marginal yield 9–14% on a $250K build.

Logan corridor (Crestmead, Marsden, Loganlea, Loganholme, Slacks Creek) — Logan's secondary-dwelling rules are permissive in nominated precincts; entry prices are SEQ's lowest, so the relative yield boost is highest; rental demand strong from the M1 commuter base. Indicative marginal yield 10–15%.

Sunshine Coast (Buderim, Sippy Downs, Mountain Creek, Pelican Waters) — Premium rents on a similar build cost, so the absolute dollar uplift is highest; rules generally permissive. Indicative marginal yield 8–12%.

Ipswich (Goodna, Bundamba, Brassall, Camira) — SEQ's lowest entry pricing, very permissive rules, but rental demand softer than Logan. Indicative marginal yield 8–13%.

Gold Coast (Pacific Pines, Mudgeeraba, Ashmore, Nerang) — Permissive rules in nominated zones, premium rents on the right sites, but bushfire and slope overlays bite.

Brisbane — Permissive rules, but lot dimensions often work against you on the established post-war stock; secondary dwellings work best on deeper LMR or LDR lots.

Casa Daily's [secondary dwelling opportunities page](/opportunities/secondary-dwelling) covers the council-by-council rules and worked yield numbers in detail.