What You Should Know Before You Add A Second Unit

Effective September 20, 2006

Second dwelling units. Second dwelling units may be permitted subject to review and approval by the Director of Community Development or his/her designee, provided the following requirements are met:

  1. A second unit may only be built on a parcel which is developed with an existing principal unit and its required parking, or in conjunction with the construction of a principal unit.
  2. The applicant shall be owner-occupant of the existing principal unit on the parcel. A covenant to this effect shall be recorded with the County Recorder’s Office prior to issuance of a building permit.
  3. Both the principal unit and the second dwelling unit shall remain permanently under one ownership. A covenant to this effect shall be recorded with the County Recorder’s Office prior to issuance of a building permit.
  4. The second dwelling unit shall be detached and located behind the principal unit. A minimum 10-foot separation between the principal unit and the second dwelling unit shall be maintained.
  5. Second dwelling units shall not exceed 16 feet in height and must only be one story. Two-story second dwelling units and units above detached garages are not permitted.
  6. The minimum floor area for a second dwelling unit shall be 400 square feet.
  7. Notwithstanding the floor area limits applicable to other accessory structures, the total area of floor space for a detached second unit shall not exceed 1,200 square feet.
  8. The proposed second dwelling unit and its associated accessory building(s) shall meet all current setback requirements. Only those accessory buildings, which are to the rear of all primary buildings, may extend into the required setback areas as described elsewhere in this section.
  9. The maximum floor area ratio (F.A.R.) of all primary and accessory buildings and structures shall not exceed a ratio of 0.60 to 1.0.
  10. Parking for the second unit shall be one garage space for each bedroom, except when the proposed second unit is for an individual 62 years of age or older and the applicant agrees in a covenant with the City that the unit will only be occupied by someone of that age or older, the parking requirement may be satisfied by one unenclosed parking space.
  11. The second dwelling unit shall be designed to be compatible with the principal dwelling. The design shall consider the use of the same materials, roof coloring, colors, and other architectural features as the principal residence.
  12. The application fee for a second unit is $356.
  13. Within ten (10) days of the approval of a second dwelling unit by the Director of Community Development, the Planning Division shall notify all property owners within a 100-foot radius of the subject property. Said notice shall include a brief description of the approved project.
  14. Approved second dwelling units shall pay all applicable development taxes as established by resolution of the City Council.

For details, exceptions, and other requirements, contact the City of Lomita Planning Department at 310-325-7110.