Frequently Asked Questions (FAQ)

If someone purchases a home in Altadena and wishes to make improvements, including additional space, what are the basic limitations on adding new square footage? I believe that in Pasadena, the maximum lot coverage is around 35%. Also, would a basement count as lot coverage if it also serves as a footing for new living space?

Maximum lot coverage is determined by the L.A. County Department of Regional Planning for those homes located in unincorporated L.A. County areas. If your property is located within the City of Pasadena, you will need to contact the City for lot coverage requirements. We have provided a link below to the County of Los Angeles Department of Regional Planning home page for your convenience. Thank you for your inquiry.

  L.A. County Department of Regional Planning
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