### What is a building setback line? - [ ] A line public utilities operate behind - [ ] The maximum height line of the building - [x] A line indicating how far a building must be constructed from property lines or streets - [ ] A line where trees or vegetation should be planted > **Explanation:** The building setback line restricts how close or far buildings should be from the property lines, streets, or right of ways. This ensures proper spacing and planning within a given area or subdivision. ### What is a common purpose of implementing building setback lines? - [ ] To increase the number of properties in an area - [x] To ensure conformity and uniformity within subdivisions or developments - [ ] To reduce taxes on developed properties - [ ] To maximize the height of buildings > **Explanation:** Zoning laws typically designate building setback lines to ensure conformity and uniformity within subdivisions or developments, maintaining an organized layout and appearance in the community. ### What does a "building envelope" establish? - [x] A perimeter around developments or subdivisions to prevent further building or improvements - [ ] A guideline for architectural design within a development - [ ] A pathway for pedestrians and vehicles - [ ] A plan for emergency evacuation routes > **Explanation:** A "building envelope" establishes a perimeter around developments or subdivisions which restricts further building or improvements, thereby maintaining the intended design and structure of the area. ### What is a possible reason for modest encroachment on setback lines? - [ ] To promote higher population density - [x] Irregularly shaped lots, such as corner lots or cul-de-sacs - [ ] To reduce construction costs - [ ] To widen streets > **Explanation:** Occasionally, some encroachment is made on these setback lines due to irregularly shaped lots such as corner lots or cul-de-sacs which make it difficult to strictly comply with setback requirements. ### Why are encroachments less common on building envelopes compared to setback lines? - [ ] Because they are more frequently enforced by law - [ ] Because they allow for higher property taxes - [ ] Because they are used to determine street layouts - [x] Due to the large size of the buffer zone surrounding the entire development > **Explanation:** Due to the large size of the buffer zone surrounding an entire development, encroachments on building envelopes are less common as there is generally more space within which to build without violating these restrictions.