Many building plans are not for new houses. They are for the room added at the back, the garage turned into a bedroom, the stoep that became a TV room. Every one of those needs approved plans unless your council treats it as minor building work.
How an addition is drawn
The existing house is measured and drawn first, then the new work is shown on top of it. Councils want to see both, usually with new work coloured or hatched so the examiner can tell them apart. If the existing house has unapproved work, it has to go on the drawings too, which is why additions often turn into a partly as-built submission.
What usually trips people up
- Building lines. A room that reaches into the side or rear building line needs a relaxation before the plans can pass.
- Coverage. Zoning limits how much of the stand may be covered by buildings. Big additions can hit it.
- Structure. Removing a load-bearing wall or adding a storey needs an engineer.
- Unapproved earlier work. If the last owner enclosed a carport without plans, it comes up now.
We check all four before drawing.
Questions people ask
I already built it. Is it too late?
No. Work built without approval can usually be regularised with as-built plans, though some councils charge an extra fee for it. See our page on unapproved building work.