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Title 16 — BUILDING REGULATIONS

Chapter 16.63 — SMALL RESIDENTIAL ROOFTOP SOLAR ENERGY SYSTEMS

Palo Alto Municipal Code · 2026-09 edition · updated 2026-09-29 · Palo Alto

16.63.010 Purpose.

The purpose of the chapter is to adopt an expedited, streamlined solar permitting process that complies with the Solar Rights Act and AB 2188 (Chapter 521, Statutes 2014) to achieve timely and cost-effective installations of small residential rooftop solar energy systems. The chapter encourages the use of solar systems by removing unreasonable barriers, minimizing costs to property owners and the City of Palo Alto, and expanding the ability of property owners to install solar energy systems. The chapter allows the City of Palo Alto to achieve these goals while protecting the public health and safety.

(Ord. 5353 § 1 (part), 2015)

16.63.020 Application.

(a) This chapter shall apply to small residential rooftop solar energy systems including, but not limited to, all additions, alterations, modifications, repairs, and improvements that require a building permit.

(b) Small residential rooftop solar energy systems legally established or permitted prior to the effective date of this chapter are not subject to the requirements of this chapter unless physical modifications or alterations are undertaken that materially change the size, type, or components of a small rooftop energy system in such a way as to require new permitting.

(Ord. 5353 § 1 (part), 2015)

16.63.030 Definitions.

The words and phrases in this chapter are defined as provided in California Civil Code section 714 and Government Code section 65850.5, except that the following words and phrases as used in this section are defined as follows:

(a) "Association" means a nonprofit corporation or unincorporated association created for the purpose of managing a common interest development.

(b) "Common interest development" means any of the following:

(1) A community apartment project.

(2) A condominium project.

(3) A planned development.

(4) A stock cooperative.

(c) "Electronic submittal" means the utilization of one or more of the following:

(1) E-mail;

(2) The Internet;

(3) Facsimile.

(d) "Small residential rooftop solar energy system" means all of the following:

(1) A solar energy system that is no larger than ten kilowatts alternating current nameplate rating or thirty kilowatt-thermal.

(2) A solar energy system that conforms to all applicable state fire, structural, electrical, and other building codes as adopted or amended by the city and paragraph (iii) of subdivision (c) of Section 714 of the Civil Code, as such section or subdivision may be amended, renumbered, or redesignated from time to time.

(3) A solar energy system that is installed on a single or duplex family dwelling.

(4) A solar panel or module array that does not exceed the maximum legal building height as defined by the authority having jurisdiction.

(e) "Solar energy system" has the same meaning set forth in paragraphs (1) and (2) of subdivision (a) of Section 801.5 of the Civil Code, as such section or subdivision may be amended, renumbered, or redesignated from time to time.

(f) "Specific, adverse impact" means a significant, quantifiable, direct, and unavoidable impact, based on objective, identified, and written public health or safety standards, policies, or conditions as they existed on the date the application was deemed complete.

(g) "Reasonable restrictions" on a solar energy system are those restrictions that do not significantly increase the cost of the system or significantly decrease its efficiency or specified performance, or that allow for an alternative system of comparable cost, efficiency, and energy conservation benefits. As provided in Civil Code section 714, subdivision (d)(1), reasonable restrictions may include, but are not limited to:

(1) For water heater systems or solar swimming pool heating systems: an amount exceeding ten percent of the cost of the system, but in no case more than one thousand dollars ($1,000), or decreasing the efficiency of the solar energy system by an amount exceeding ten percent, as originally specified and proposed.

(2) For photovoltaic systems: an amount not to exceed one thousand dollars ($1,000) over the system cost as originally specified and proposed, or a decrease in system efficiency of an amount exceeding ten percent as originally specified and proposed.

(Ord. 5353 § 1 (part), 2015)

16.63.040 Solar energy system requirements.

(a) All solar energy systems shall meet applicable health and safety standards and requirements imposed by the State of California and the City of Palo Alto Development Services, City of Palo Alto Fire Department and City of Palo Alto Utilities Department.

(b) Solar energy systems for heating water in single-family residences and for heating water in commercial or swimming pool applications shall be certified by an accredited listing agency as defined by the California Plumbing and Mechanical Code.

(c) Solar energy systems for producing electricity shall meet all applicable safety and performance standards established by the California Electrical Code, the Institute of Electrical and Electronics Engineers, and accredited testing laboratories such as Underwriters Laboratories and, where applicable, rules of the Public Utilities Commission regarding safety and reliability.

(d) Prior to submitting an application, the applicant shall:

(1) Verify to the applicant's reasonable satisfaction through the use of standard engineering evaluation techniques that the support structure for the small residential rooftop solar energy system is stable and adequate to transfer all wind, seismic, and dead and live loads associated with the system to the building foundation; and

(2) At the applicant's cost, verify to the applicant's reasonable satisfaction using standard electrical inspection techniques that the existing electrical system including existing line, load, ground and bonding wiring as well as main panel and subpanel sizes are adequately sized, based on the existing electrical system's current use, to carry all new photovoltaic electrical loads.

(Ord. 5353 § 1 (part), 2015)

16.63.050 Duties of development services and building official.

(a) The building official shall develop and adopt an eligibility checklist and standard plan. All documents required for the submission of an expedited solar energy system application shall be made available on the publicly accessible City of Palo Alto Website.

(b) The small residential rooftop solar system permit process, standard plan(s), and checklist(s) shall substantially conform to recommendations for expedited permitting, including the checklist and standard plans contained in the most current version of the California Solar Permitting Guidebook adopted by the Governor's Office of Planning and Research.

(c) The applicant may submit the permit application and associated documentation to the City's Development Services by personal, mailed, or electronic submittal together with any required permit processing and inspection fees.

(d) In the case of electronic submittal, the electronic signature of the applicant on all forms, applications and other documentation may be used in lieu of a wet signature.

(Ord. 5353 § 1 (part), 2015)

16.63.060 Plan review and inspection requirements.

(a) An application that satisfies the information requirements in the eligibility checklist and standard plan, as determined by the building official, shall be deemed complete. Upon receipt of an incomplete application, the building official shall issue a written correction notice detailing all deficiencies in the application and any additional information required to be eligible for expedited permit issuance.

(b) The building official may require an applicant to apply for a use permit if the official makes written findings, based on substantial evidence, that the solar energy system could have a specific, adverse impact upon the public health and safety. The building official's findings may be appealed to the Planning and Transportation Commission under Section 18.78.030 of this Code.

(c) Any condition imposed on an application shall be designed to mitigate the specific, adverse impact upon health and safety at the lowest possible cost.

(d) "A feasible method to satisfactorily mitigate or avoid the specific, adverse impact" includes, but is not limited to, any cost-effective method, condition, or mitigation imposed by the city on another similarly situated application in a prior successful application for a permit. The city shall use its best efforts to ensure that the selected method, condition, or mitigation meets the conditions of subparagraphs (A) and (B) of paragraph (1) of subdivision (d) of Section 714 of the California Civil Code defining restrictions that do not significantly increase the cost of the system or decrease

its efficiency or specified performance.

(e) The city shall not condition the approval of an application on the approval of an association, as defined in Section 4080 of the California Civil Code.

(f) Issuance of the permit does not authorize an applicant to connect the small residential rooftop energy system to City of Palo Alto Utilities' electricity grid. The applicant is responsible for obtaining such approval or permission from City of Palo Alto Utilities before requesting a building inspection.

(g) For a small residential rooftop solar energy system eligible for expedited review, only one consolidated inspection shall be required, which shall be done in a timely manner. This inspection shall encompass all applicable local, state, and federal health and safety regulations including fire department regulations. If a small residential rooftop solar energy system fails inspection, a subsequent inspection is authorized; however the subsequent inspection need not conform to the requirements of this section.

(Ord. 5353 § 1 (part), 2015)

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▸Contents — Palo Alto Municipal Code
Palo Alto Municipal Code
  1. Article VIII — A. Board of Education
  2. Title 1 — GENERAL PROVISIONS
  3. Title 2 — ADMINISTRATIVE CODE
  4. Title 4 — BUSINESS LICENSES AND REGULATIONS
  5. Title 5 — HEALTH AND SANITATION
  6. Title 6 — ANIMALS
  7. Title 8 — TREES AND VEGETATION
  8. Title 9 — PUBLIC PEACE, MORALS AND SAFETY
  9. Title 10 — VEHICLES AND TRAFFIC
  10. Title 11 — ENVIRONMENTAL IMPACT PROCEDURE
  11. Title 12 — PUBLIC WORKS AND UTILITIES
  12. Title 13 — IMPROVEMENT PROCEDURE
  13. Title 15 — FIRE PREVENTION
  14. ▸Title 16 — BUILDING REGULATIONS
    Overview
    1. 16.04 California Building Code, California Code of Regulations…
    2. 16.05 California Mechanical Code, California Code of Regulatio…
    3. 16.08 California Plumbing Code, California Code of Regulations…
    4. 16.09 Sewer Use Ordinance
    5. 16.10 Private Sewage Disposal Systems
    6. 16.11 Stormwater Pollution Prevention
    7. 16.12 Recycled Water
    8. 16.13 Requirements for Food Facilities Related to Water Pollut…
    9. 16.14 California Green Building Standards Code, California Cod…
    10. 16.15 Electric Vehicle Charging Stations
    11. 16.17 California Energy Code, California Code of Regulations, …
    12. 16.19 California Historical Building Code, California Code of …
    13. 16.20 Signs
    14. 16.24 Fences
    15. 16.28 Excavations, Grading and Fills
    16. 16.32 Moving and Relocating Buildings
    17. 16.36 House Numbering
    18. 16.38 Certificate of Use and Occupancy for Community Housing
    19. 16.40 Unsafe Buildings
    20. 16.42 Seismic Hazards Identification Program
    21. 16.44 Fallout Shelters
    22. 16.45 Transportation Impact Fee for New Nonresidential Develop…
    23. 16.46 Approval of Projects with Impacts on Traffic in the San …
    24. 16.47 Reserved
    25. 16.48 Reserved
    26. 16.49 Historic Preservation
    27. 16.50 Reserved
    28. 16.52 Flood Hazard Regulations
    29. 16.56 Handicapped Access Regulations - Appeal
    30. 16.57 In-Lieu Parking Fee for New Nonresidential Development i…
    31. 16.58 Development Impact Fees
    32. 16.59 Citywide Transportation Impact Fee
    33. 16.60 Charleston Arastradero Corridor Pedestrian and Bicyclist…
    34. 16.61 Public Art for Private Developments
    35. 16.62 Expired Permits for Residential Construction and Demolit…
    36. 16.63 Small Residential Rooftop Solar Energy Systems
    37. 16.64 Development Fee and In-lieu Payment Administration
    38. 16.65 Citywide Affordable Housing Requirements
    39. 16.66 Hauled Liquid Waste
    40. Chapter 16.04 — CALIFORNIA BUILDING CODE, CALIFORNIA CODE OF
    41. Chapter 16.05 — CALIFORNIA MECHANICAL CODE, CALIFORNIA CODE OF
    42. Chapter 16.08 — CALIFORNIA PLUMBING CODE, CALIFORNIA CODE OF
    43. Chapter 16.09 — SEWER USE ORDINANCE
    44. Chapter 16.10 — PRIVATE SEWAGE DISPOSAL SYSTEMS
    45. Chapter 16.11 — STORMWATER POLLUTION PREVENTION
    46. Part 2 — General Provisions
    47. Part 3 — Development Projects
    48. Part 10 — Copper Controls
    49. Part 3 — Development Projects
    50. Part 4 — Required Best Management Practices for All Dischargers
    51. Part 5 — Illicit Discharge Detection and Elimination and Mobil…
    52. Part 6 — Pesticides Toxicity Control
    53. Part 7 — Trash Load Reductions
    54. Part 8 — Mercury Controls
    55. Part 9 — Polychlorinated Biphenyls (PCBs) Controls
    56. Part 10 — Copper Controls
    57. Chapter 16.12 — RECYCLED WATER
    58. Chapter 16.13 — REQUIREMENTS FOR FOOD FACILITIES RELATED TO WA…
    59. Part 6 — Rooftop Grease Containment System Requirements
    60. Part 11 — Food Facility Closure or Ownership Change
    61. Part 3 — Authority to Inspect and Enforce
    62. Part 4 — Prohibited Discharges, Devices, and Connections
    63. Part 5 — Grease Control Device Requirements
    64. Part 6 — Rooftop Grease Containment System Requirements
    65. Part 7 — Waste Oil Management Requirements
    66. Part 8 — Spill Response Requirements
    67. Part 9 — Best Management Practices for Existing Facilities
    68. Part 10 — Mobile Food Facilities
    69. Part 11 — Food Facility Closure or Ownership Change
    70. Chapter 16.14 — CALIFORNIA GREEN BUILDING STANDARDS CODE,
    71. Part 1 — General
    72. Chapter 4 — RESIDENTIAL
    73. Chapter 7 — INSTALLER AND SPECIAL
    74. Part 7 — Local Modifications to
    75. Chapter 5 — NONRESIDENTIAL
    76. Part 9 — Local Modifications to
    77. Part 1 — General
    78. Chapter 1 — ADMINISTRATION
    79. Chapter 2 — DEFINITIONS
    80. Chapter 3 — GREEN BUILDING
    81. Chapter 4 — RESIDENTIAL MANDATORY MEASURES
    82. Chapter 7 — INSTALLER AND SPECIAL INSPECTOR QUALIFICATIONS
    83. Part 7 — Local Modifications to
    84. Chapter 5 — NONRESIDENTIAL MANDATORY MEASURES
    85. Part 9 — Local Modifications to
    86. Chapter 16.16 — CALIFORNIA ELECTRICAL CODE, CALIFORNIA CODE OF
    87. Chapter 16.17 — CALIFORNIA ENERGY CODE, CALIFORNIA CODE OF
    88. Chapter 16.19 — CALIFORNIA HISTORICAL BUILDING CODE, CALIFORNI…
    89. Chapter 16.20 — SIGNS
    90. Chapter 16.20 — Table 1
    91. Chapter 16.20 — Table 2
    92. Chapter 16.20 — Table 2
    93. Chapter 16.20 — Table 3
    94. Chapter 16.24 — FENCES
    95. Chapter 16.28 — GRADING AND EROSION AND SEDIMENT CONTROL
    96. Chapter 16.32 — MOVING AND RELOCATING BUILDINGS
    97. Chapter 16.36 — HOUSE NUMBERING
    98. Chapter 16.38 — CERTIFICATE OF USE AND OCCUPANCY FOR COMMUNITY
    99. Chapter 16.40 — UNSAFE BUILDINGS
    100. Chapter 16.44 — FALLOUT SHELTERS
    101. Chapter 16.45 — TRANSPORTATION IMPACT FEE FOR NEW NONRESIDENTIAL
    102. Chapter 16.46 — APPROVAL OF PROJECTS WITH IMPACTS ON TRAFFIC I…
    103. Chapter 16.48 — RESERVED
    104. Chapter 16.49 — HISTORIC PRESERVATION
    105. Chapter 16.50 — RESERVED
    106. Chapter 16.52 — FLOOD HAZARD REGULATIONS
    107. Chapter 16.56 — HANDICAPPED ACCESS REGULATIONS - APPEAL
    108. Chapter 16.57 — IN-LIEU PARKING FEE FOR NEW NONRESIDENTIAL DEV…
    109. Chapter 16.58 — DEVELOPMENT IMPACT FEES
    110. Chapter 16.59 — CITYWIDE TRANSPORTATION IMPACT FEE
    111. Chapter 16.60 — CHARLESTON ARASTRADERO CORRIDOR PEDESTRIAN
    112. Chapter 16.61 — PUBLIC ART FOR PRIVATE DEVELOPMENTS
    113. Chapter 16.62 — EXPIRED PERMITS FOR RESIDENTIAL CONSTRUCTION AND
    114. Chapter 16.63 — SMALL RESIDENTIAL ROOFTOP SOLAR ENERGY SYSTEMS
    115. Chapter 16.64 — DEVELOPMENT FEE AND IN-LIEU PAYMENT ADMINISTRA…
    116. Chapter 16.66 — HAULED LIQUID WASTE
  15. Title 17 — HAZARDOUS MATERIALS STORAGE
  16. Title 18 — ZONING
  17. Title 19 — MASTER PLAN
  18. Article 7 — AUTHORITY FOR AND SCOPE OF MASTER OR GENERAL PLANS.
  19. Article 8 — PROCEDURE FOR ADOPTION OF MASTER OR GENERAL PLAN.
  20. Chapter 19.06 — SPECIFIC PLANS
  21. Chapter 19.10 — COORDINATED AREA PLANS
  22. Title 20 — PRECISE PLANS
  23. Title 21 — SUBDIVISIONS AND OTHER DIVISIONS OF LAND
  24. Title 22 — PARKS

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