Use it when
- You are testing a granny-flat build on a selected property.
- You need project cost and extra rent evaluated beside tax treatment, not after it.
- You want to see the payoff horizon and year-1 accounting before committing.
Test a granny-flat project with project economics, funding, and tax effect kept together.
Compare one selected property with and without a granny flat, then read the project cost, tax effect, and long-run position change in that order.
This page is for a specific build decision where apportionment, project funding, and PPOR exposure matter.
How the page works
The structure stays the same even when the property decision changes.
You set
- Build cost, expected rent, operating costs, and income-producing apportionment.
- Cash and loan funding used to pay for the project.
- Projection horizon and growth assumptions.
You inspect
- Project cost, funding balance, and payoff horizon.
- Selected-property outcome over time with and without the granny flat.
- Year-1 property accounting and tax-model detail.
Compare this against the rest of the decision set.
See the rest of the public decision set, or open the product to run this against your own records.