1. That the property to be divided is of such size or shape, or is affected by such topographic conditions, that it is impossible, impractical or undesirable, in the particular case, to conform to the strict application of the regulations codified in this title; and

2. That the cost to the subdivider of strict or literal compliance with the regulations is not the sole reason for granting the modification; and

3. That the modification will not be detrimental to the public health, safety and welfare, or be injurious to other properties in the vicinity; and

4. That granting the modification is in accord with the intent and purposes of these regulations, and is consistent with the general plan and with all applicable specific plans or other plans of the city.