Title 8 — ZONING & DEVELOPMENT CODE

Chapter 8.324 — ACCESSORY USES PERMITTED IN ANY “R” DISTRICT.

San Mateo County Zoning Code · 2026-06 edition · ingested 2026-07-06 · San Mateo County

8.324.010 - Accessory Uses Permitted in Any “R” District.

The following accessory uses, in addition to those hereinbefore specified, shall be permitted in any “R” District, provided that such accessory uses do not alter the character of the premises in respect to their use for the purposes permitted in such respective districts.

(a) Rental of rooms.

  1. Provisions within the Coastal Zone.

The renting of rooms and/or the providing of table board in a dwelling as an incidental use to that of its occupancy as a dwelling of the character permitted in the respective district, but not to the extent of constituting a hotel as defined in this Part, unless permitted in the district.

  1. Provisions outside the Coastal Zone.

San Mateo County, California, Code of Ordinances Title 8 – Zoning & Development Code

The long term renting of rooms and/or the providing of table board in a dwelling (for a period of 30 consecutive days or longer only) as an incidental use to that of its occupancy as a dwelling of the character permitted in the respective district, but not to the extent of constituting a hotel as defined in this Part, unless permitted in the district. (The short term rental of rooms, for a period less than 30 consecutive days, and bed and breakfast inns are not allowed in “R” Districts outside the Coastal Zone.)

  • (b) The installation and operation of necessary facilities and equipment in connection with such schools, colleges, universities, hospitals and other institutions as are permitted in the respective districts.

  • (c) Recreation, refreshment and service buildings in public parks and playgrounds.

  • (d) The office of a resident person engaged in one of the following professions, subject, however, to the same requirements and limitations as specified for home occupations:

    1. Architect.

    2. Lawyer.

    3. Physician and/or surgeon.

    4. Other professions which in the opinion of the Planning Commission are similar in character.

  • (e) Signs for the following specified purposes provided, however, that no such sign shall be illuminated by other than reflected light and provided, further, that no fluorescent or phosphorescent paint shall be employed on any sign permitted by the provisions of this paragraph:

    1. Advertising the sale or lease of property on which displayed; provided that the area of such signs shall not exceed, in the aggregate, six (6) square feet for each lot advertised and that no tract sign shall exceed two hundred fifty (250) square feet in area, and provided further that a permit valid for a period of six (6) months be secured before erecting or placing any such sign or signs.

    2. Personal name plates; provided that they do not exceed one (1) square foot in area.

    3. Announcement signs or bulletin boards for public, charitable, or religious institutions provided that such signs or bulletin boards shall not exceed twelve (12) feet in area.

San Mateo County, California, Code of Ordinances Title 8 – Zoning & Development Code

  1. Advertising a non-conforming business, or industry; provided that such sign does not exceed twelve (12) square feet in area and is attached flat against the wall of the building in which such nonconforming business or industry is located; provided, however, that any signs which do not conform to the requirements of this subsection and which were in existence prior to the passage of this Part shall be made to conform to the requirements of this subsection within three (3) years of the passage of this Part.

    1. Upon the securing of a use permit as provided in Chapter 8.280, directional signs used for directional or informational purposes of a public or quasi-public nature.
  • (f) 1. The parking of not more than one house trailer for a period not to exceed more than two weeks in any one year period.

    1. The storage of not more than one house trailer within a completely enclosed building so located as to conform with all provisions of this Part.
  • (g) Real estate sales offices in garages of subdivision model homes subject to adopted policy standards.

(Prior code § 6400(a); Amd. Ord. 4225, 07/27/2004)

(Prior code § 6400(g); Ord. 1848, 09/19/1967)