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City of San Mateo Municipal Code.

27.29.106 DENSITY.

(a) The maximum allowed density shall be as follows:

(1) In /R4 districts, the development standards in Section 27.24.040 shall apply;

(2) In /R5 districts, residential development shall not exceed 50 units per acre, regardless of parcel size;

(3) In /R districts, the following minimum development standards shall apply:

(A) For parcels located within the Downtown Specific Plan area, residential development shall not exceed 50 units per acre, regardless of parcel size. Densities above 50 units per acre are permitted only where specific criteria are met as stated in the General Plan Land Use Element.

(B) For parcels located outside the Downtown Specific Plan Area, the following minimum standards shall apply:

Minimum Parcel Area (Square Feet) Minimum Parcel Width (Lineal Feet) Minimum Parcel Area/D.U. (Square Feet)
4,000* 40* 2,200*
5,000 50 2,500
8,000 65 2,000
10,000 80 1,000
15,000 100 870
20,000 100 582**

* These standards are permitted only if a parcel is lying northeasterly of El Camino Real and was recorded prior to March 3, 1947.

** Densities above 50 units per acre are permitted only where specific criteria are met as stated in the General Plan Land Use Element.

(b) A larger minimum parcel for special uses shall be required by the Planning Commission upon a finding that the minimum parcel does not adequately accommodate the proposed special use.