Where is the new exterior wall placed in relation to the property line?

The correct answer indicates that the new exterior wall is placed 21 feet from the property line, which suggests a consideration of zoning regulations or local building codes that typically dictate minimum setbacks to allow for access to light, air, and fire safety. Setback requirements vary by locality, and the distance from the property line can be influenced by various factors, including the type of building, the use of the lot, and surrounding structures.

It is important to recognize that property lines define legal boundaries, and constructing a wall too close to these lines can lead to disputes with neighbors or violations of local regulations. The 21-foot setback may be specifically tailored to ensure compliance with these codes, thus maintaining a safe and aesthetically pleasing environment. This distance may also provide space for landscaping, utility access, and future development considerations, which are often required or encouraged by municipal guidelines.