The purpose of this chapter, which shall be known as the "Mapped Street Ordinance," is to establish building lines and to protect rights-of-way for the future widening of existing streets and for future streets.

Where a lot or parcel of land abuts a public street, a building line is established on the lot or parcel parallel to the front line thereof and located, measured from the existing centerline of the street, a distance equal to the required depth of the front yard of the lot or parcel as prescribed by this chapter, plus a distance equal to one-half of the ultimate width of the abutting street as such ultimate width is shown on the General Plan.

With regard to lots or parcels abutting a street or streets upon which there has been a previous determination by the Planning Commission and City Council that only a portion of the ultimate street width has been acquired, the City Council shall determine the precise ultimate street width and shall adopt the same as a mapped street on the General Plan, and thereafter such alignment shall be the basis for the establishment of a building line, as provided in Section 21.06.020 of this chapter.

No building permit shall be issued for construction of any building or structure in any building setback area or in the right-of-way of any mapped street. Temporary structures, such as walls, fences, signs or other easily removable structures, involving a cost of not to exceed $1,000 may be constructed in such areas.

Any applicant aggrieved by the denial or conditional approval of a building permit pursuant to Section 21.06.070 may by written notice request a hearing on such matter before the Planning Commission. The Planning Commission shall thereupon and within 40 days thereafter, hold a hearing at which the applicant and other interested persons shall be given the opportunity to be heard; at least 10 days prior to the date fixed for such hearing, the Planning Commission shall cause notice of the time and place thereof to be mailed by certified mail to the applicant and to any person requesting such notice.

Upon exhaustion of all administrative relief as provided in Sections 21.06.080 and Chapter 1.10, any applicant dissatisfied with the final decision may, by written notice filed within 15 days thereafter, demand that the City acquire by eminent domain or other available procedure the land belonging to the applicant and located within the designated right-of-way of the proposed street widening or mapped street. Upon failure of the City Council, within 12 months thereafter, to commence such acquisition proceedings, or thereafter with reasonable diligence to prosecute the same to completion, the applicant may reapply for such building permit and thereupon such building permit shall be processed without regard to Section 21.06.070.

Structures existing in building setback areas and in mapped streets on September 1, 1965, shall be deemed to be legal nonconforming structures, subject to the regulations, limitations, abatement and amortization provided in this title.

These sections shall not permit the construction, erection, placing or maintenance of any building or structure at any place where the same is prohibited by any other law, regulation or title.