Granny Flat & Dual Occupancy ROI
Model the return on adding a granny flat or secondary dwelling. See the yield uplift, payback period, and income impact before you build.
Brisbane zoning check first
Secondary dwellings (granny flats) are permitted in Low-Medium Density Residential zones (LMR) and some Character zones in Brisbane. Some lots require a minimum size (typically 600m²). Check BCC CityPlan 2014 for your property before building. BCC CityPlan 2014.
This calculator is for indicative planning purposes. Build costs, rental income, and property value uplift vary significantly. DA approval, council contributions, and connection costs are not included. Always get fixed-price quotes from licensed builders and confirm BCC approval requirements before proceeding.
Before you build
Weighing up the ROI? Find out what your property could achieve with or without the granny flat.
Not every property suits a secondary dwelling, and the build cost is only part of the story. Daniel can give you an honest read on what your property is likely to achieve and whether the numbers stack up for your specific block.
Book a Free WalkthroughWant more context? Read the full guide: Development Potential in Brisbane's Inner East →
Want to know what this means for your property?
Daniel walks through your property, reviews recent sold results in your street, and gives you a clear number. Free, no obligation.