Chapter 4. Building Lines. § 6–401. Building lines established on streets less than 90 feet wide. § 6–402. Condemnation proceedings — Filing of plats and petition. § 6–403. Condemnation proceedings — Procedures. § 6–404. Permits for extensions of buildings beyond building line. § 6–405. Exceptions for existing buildings; control of parking. § 6–406. Appropriations.