A granny flat is a second dwelling, and that makes it a zoning question before it is a plans question. Councils in Gauteng allow second dwellings on many residential stands, with limits on size, and some need a consent application first.
The order things happen in
- Check the zoning certificate and the title deed conditions.
- If a consent use or relaxation is needed, a town planner applies for it.
- Plans are drawn and submitted.
- Building starts once the plans are approved.
If step 1 is skipped, you can end up with a flat the council does not allow you to rent out.
What the plans cover
The same as any dwelling: site plan, floor plan, sections, elevations, drainage, and SANS 10400-XA energy information. A converted outbuilding is drawn as an alteration, with the existing structure shown.