What is the maximum floor area of a single detached dwelling where a building permit is not required?

The correct answer regarding the maximum floor area of a single detached dwelling where a building permit is not required is based on zoning and building codes that typically govern such regulations. In many jurisdictions, a single detached dwelling can be built without a permit as long as it does not exceed certain size limitations.

The threshold for this exemption is often around 20 square meters, as the intent is to allow for small structures that can serve purposes such as garden sheds, playhouses, or similar uses without the need for the more formal permitting process. This size limit typically accommodates the need for practicality while ensuring that larger structures, which could potentially have significant impacts on the environment or neighboring properties, adhere to stricter regulations and codes.

Options suggesting sizes below 20 square meters may not align with the current regulations that define the minimum threshold for requiring a permit. Therefore, a maximum floor area of 20 square meters reflects a common regulatory standard where smaller structures can be constructed without overburdening the permitting system.