The average width of a lot which is shown as part of a subdivision recorded as a final map or filed as a record of survey map in accordance with law, except that where a parcel which otherwise would have been shown as one lot is divided into two or more lots because of the city boundary line or a line between land, the title to which is registered under the Land Title Law (Torrens Title) and land the title to which is not so registered, in which case the "required width" means the average width of such parcel;

The average width of a lot, or parcel of land the right of possession of which, by virtue of a deed duly recorded, or by a recorded contract of sale, is vested in a person who neither owns nor has the right of possession of any contiguous parcel of property; provided, that the deed or contract of sale by which such right of possession was separated has been recorded prior to the adoption by the city council of the ordinance which imposes the width requirement upon such lot or parcel of land; or

The width specified by any legislative restriction except in those cases in which the commission is approving a tentative map of a subdivision, as provided in Title 16.

The owner or owners of two or more contiguous lots or parcels of land, one or more of which has a width of less than fifty feet, may file a map with the city merging such lots or parcels of land into the same or a lesser number of parcels. The planning commission may approve such maps, if:

Each parcel shown on a map approved by the planning commission pursuant to this section shall be deemed to have the required width.

Where, prior to the territory being zoned R-1 or R-2, lots exist not less than one hundred feet deep but less than fifty feet wide, if two or more such contiguous lots, or one or more such contiguous lots and one or more lots also contiguous thereto which have a depth of not less than one hundred feet, have a total frontage of not less than fifty feet, such lots may be treated and considered as one parcel.

If such parcel is in zone R-1, two single-family dwellings may be constructed thereon and so used. If such parcel is in zone R-2 two single-family dwellings or two two-family dwellings or one single-family dwelling and one two-family dwelling may be constructed thereon and so used.

As used in this chapter, "required area" means:

No construction shall be permitted in the city upon any lot or parcel of land less than five thousand square feet in area, except lots less than five thousand square feet in area which were created legally prior to the effective date of the ordinance codified in this chapter (October 21, 1964).

When more than one single-family residence in zones R-1 and P or more than two single-family or one two-family residence in zone R-2, or more than four dwelling units in one-family or two-family residences in zones R-3 or R-4 are established, constructed, occupied, structurally altered or used on a lot or parcel of land having twice the required area or more, the owner of such lot or parcel of land shall file in the office of the commission, for the administrative records and for revision and verification of compliance, a plot plan showing the size of the said lot or parcel of land, the use and location of the buildings and the area provided for each such residence as herein required.

Prior to the approval of the plot plan, the commission shall conduct a public hearing thereon, such hearing to be conducted in accordance with the rules and procedures established by the commission. Notice of the time and place of the public hearing shall include a general description of the matter to be considered and the location of the project, and shall be given at least ten days prior to the hearing in the following manner: by posting the notice in at least three public places in the city, including at least one notice in the affected area; by mail or delivery of the notice to the project proponent and to all persons, including businesses, corporations, or other public or private entities shown on the last equalized assessment roll as owning real property within three hundred feet of the subject property; and by giving such other additional notice as deemed appropriate by the commission.

In the event that the plans show that the proposed development of the property will violate any provision of this chapter, will not maintain the character and integrity of the district in which such use is intended to be established, erected, constructed, occupied, structurally altered or used, or will be detrimental to the general welfare of the community, the director may require such revision of the plan as may be necessary to correct these conditions.

Where more than one dwelling is constructed on one lot or parcel of land, the buildings shall be so located that the lot or parcel of land can be divided into smaller parcels or lots, each of which will contain not less than the required area, and on each of which when considered as a separate lot or parcel, the number and location of buildings will comply with the requirements of this title.