Step 5: Number the Houses
Mark the First House. Now that we know the Ascendant we have also identified the starting point of the chart. The Ascendant is always the beginning of the First House. We count the houses counterclockwise.
Mark the other Houses. Use ascending numericals from 1-12. Some charts have this already marked. Note the house sizes: The houses in a chart are not necessarily all the same size but they can be.