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Casa Daily Tools · Secondary dwelling feasibility tool

Casa Daily Granny Flat Checker

The Casa Daily Granny Flat Checker tells you whether you can build a secondary dwelling (granny flat) on any South-East Queensland property — and if so, the maximum size, whether separate tenancy is permitted, the indicative build cost, and the gross marginal yield. Covers Brisbane, Gold Coast, Sunshine Coast, Moreton Bay, Logan, Redland, and Ipswich, each with their distinct council rules.

What it does

FeatureDescription
Council-specific rulesEach council's maximum GFA (typically 70-90m²), setback rules, and separate-tenancy permissions applied.
Lot suitabilityWhether your existing dwelling siting leaves room for a compliant secondary.
Build cost estimateIndicative turn-key 70-80m² Class 1a build cost (typically $180-280K in SEQ).
Yield calculationIndicative weekly rent and gross marginal yield based on suburb comparables.
Accepted vs DA pathwayWhether the proposal qualifies as Accepted Development (no DA) or requires an MCU.

How to use the Casa Daily Granny Flat Checker

  1. Step 01

    Search your address

    Type the SEQ address into the dashboard.

  2. Step 02

    Open the Secondary Dwelling tab

    The Snapshot view shows whether a secondary dwelling is permitted under the council rules and your lot dimensions.

  3. Step 03

    Review the yield

    Indicative build cost, weekly rent, and gross marginal yield based on suburb comparables.

  4. Step 04

    Check separate-tenancy permission

    Crucial — separate tenancy materially changes the yield. The checker surfaces the council's specific rule.

Common questions

Do I need a DA for a granny flat in Brisbane?
Generally no, if the proposal stays within Brisbane's Accepted thresholds (≤80m² GFA, single secondary, complies with setbacks). The Casa Daily checker tells you whether your specific block + design qualifies.
Can I rent the granny flat to anyone?
In most SEQ councils — yes, separate tenancy is permitted as Accepted Development. Some Redland zones and certain character precincts restrict tenancy. The checker surfaces your council's actual rule.
What yield should I expect?
Turn-key 70-80m² 2-bed secondary dwellings typically rent for $450-650/week in middle-ring SEQ on a $200-280K build — gross marginal yield 8-15%. Casa Daily's checker uses suburb-specific rent comparables, not generic figures.

Related opportunities

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