Residential Title 24 Energy Reports

Compliance documentation for single-family new construction, additions and remodels across all 16 California climate zones.

  1. Choose your report
  2. Upload your plans
  3. Pay securely
  4. Permit-ready report by email

Residential projects run the full range, from a window replacement that needs a short compliance document to a ground-up custom home modelled against a zone-specific energy budget. What they share is that the local building department expects the energy documentation as part of the plan-check submittal.

Project types we cover

Additions and alterations are not the same thing

An addition creates new conditioned floor area. An alteration changes an existing regulated component without adding area. The Energy Code treats them differently, and a project can be both at once — a common example is an addition that also replaces the heating system serving the existing house. Documenting only one half is a frequent source of correction letters.

Which compliance path applies

There are two routes. The prescriptive path is a checklist: meet each listed requirement and you comply. The performance path uses CEC-approved modelling software to show your design meets an energy budget overall, which allows trade-offs — more glazing here, better insulation there. The Energy Commission’s compliance manual calls the performance approach popular with builders because of that flexibility. We select the path that gets your design approved rather than forcing the design to fit the path.

Pricing

From $245, including up to 3,500 sq ft. Every additional 500 sq ft is +$49, calculated in the order form so you see the exact figure before paying.

Common residential Title 24 questions

  1. When is Title 24 required for a home?
  2. Does a remodel need Title 24?
  3. Does a room addition need Title 24?
  4. What plans are needed for a residential Title 24 report?
  5. How much does a residential Title 24 report cost?
  6. How long does a residential Title 24 report take?
  7. What is the CF1R for a house?
  8. Do new windows need Title 24?
  9. Does an HVAC replacement need Title 24?
  10. What if plan check returns Title 24 corrections on a house?
  11. When is duct leakage testing required?
  12. What is refrigerant charge verification?
  13. What is Quality Insulation Installation (QII)?
  14. Whole-house ventilation requirements
  15. What is an ECC-Rater?
  16. Is solar required on a new home in California?
  17. JA8 lighting requirements explained
  18. Solar ready requirements explained
  19. Can you use aluminum windows under Title 24?
  20. What are the Title 24 heat pump requirements for homes?
  21. What are the Title 24 insulation requirements for homes?
  22. What are the Title 24 water heater requirements?
  23. What are the JA12 battery storage requirements?
  24. Does adding central air need Title 24?
  25. Does unpermitted work need a Title 24 report?
  26. Title 24 HVAC Load Calculations
  27. Title 24 Electric-Ready Requirements
  28. Title 24 Pool and Spa Requirements
  29. Does a Sunroom Need Title 24?
  30. Title 24 Skylight Requirements for Homes
  31. Second-Story Addition Title 24 Requirements
  32. Does an Attic Conversion Need Title 24?
  33. Does a Basement Conversion Need Title 24?
  34. Adding Solar to an Existing Home: Title 24 Rules
  35. Replacing Light Fixtures Under Title 24
  36. Title 24 Requirements for Fireplaces
  37. Do Tiny Homes Need Title 24?
  38. Does an Electrical Panel Upgrade Need Title 24?
  39. Title 24 Outdoor Lighting Rules for Homes
  40. Do Shipping Container Homes Need Title 24?
  41. Title 24 Bathroom Exhaust Fan Requirements
  42. Is Your Range Hood Title 24 Compliant?
  43. Does Title 24 Require a Whole House Fan?
  44. How Many CFM Does the Ventilation Fan Need?
  45. Title 24 Duct Insulation Requirements
  46. Title 24 Exterior Door Requirements
  47. Which Wall Assembly Meets Title 24?
  48. Are Your Shingles Title 24 Compliant?
  49. Windows in a Wildfire Zone: Vinyl, Aluminum and Title 24
  50. Does a Patio Cover, Pergola or Carport Need Title 24?
  51. Which Jobs Need HERS Testing (Now ECC Verification)?
  52. How Much Does HERS Testing (Now ECC Verification) Cost?
  53. How to Find an ECC-Rater (Formerly a HERS Rater)
  54. Can My HVAC Contractor Do the HERS (Now ECC) Test Himself?
  55. What Happens If You Fail the HERS (Now ECC) Test?
  56. What SEER2 Does California Require for a Home AC or Heat Pump?
  57. Does Replacing an AC Coil or Compressor Trigger Title 24?
  58. Do You Need a Permit to Replace an HVAC System or Water Heater in California?
  59. Where Can You Install a Heat Pump Water Heater Under Title 24?
  60. Can You Add a Hot Water Recirculation Pump Under Title 24?
  61. How Big a Solar System Does a New Home Need Under Title 24?
  62. When Is a New Home Exempt From the Title 24 Solar Requirement?
  63. Which Rooms Need a Dimmer or Vacancy Sensor Under Title 24?
  64. How Do You Know a Light Fixture or Bulb Is Title 24 Compliant?
  65. Can You Install Electric Baseboard or Wall Heaters Under Title 24?
  66. Window Replacement Title 24 Checklist
  67. Whole-House Window Replacement: Title 24 Requirements
  68. Replacing One Window: Does Title 24 Apply?
  69. Sliding Glass Door Replacement: Title 24 Requirements
  70. French Door Replacement: Title 24 Requirements
  71. Exterior Door Replacement: Title 24 Requirements
  72. Skylight Replacement: Title 24 Requirements
  73. Window Film and Tint: Title 24 Requirements
  74. NFRC Labels and Title 24 Window Approval
  75. What Happens If a Window Has No NFRC Label?
  76. Title 24 U-Factor vs SHGC: Which Number Matters?
  77. Does Window Orientation Matter for Title 24 Compliance?
  78. Do Window Overhangs Help Title 24 Compliance?
  79. Exterior Shading and Title 24 Performance Credit
  80. Cool Roof Requirements When Reroofing a House
  81. When Does Roof Replacement Trigger Insulation Upgrades?
  82. Attic Insulation Requirements for California Remodels
  83. Cathedral Ceiling Insulation Under the 2025 Energy Code
  84. Vaulted Ceiling Insulation Under the 2025 Energy Code
  85. Spray Foam at the Roof Deck: Title 24 Requirements
  86. Unvented Attic Title 24 Requirements
  87. Radiant Barrier Requirements Under Title 24
  88. Re-Siding a House: Does Title 24 Require Wall Insulation?
  89. Re-Stuccoing a House: Does Title 24 Require Wall Insulation?
  90. Crawl Space Insulation Requirements Under Title 24
  91. Raised Floor Insulation Requirements Under Title 24
  92. Slab Floor Title 24 Requirements for Additions and Conversions
  93. Furnace Replacement Title 24 Checklist
  94. Air Conditioner Replacement Title 24 Checklist
  95. Heat Pump Replacement Title 24 Checklist
  96. Mini-Split Installation Title 24 Checklist
  97. Adding Air Conditioning to an Existing House: Title 24 Requirements
  98. Duct Replacement 25-Foot Rule Under Title 24
  99. Extending Existing Ducts to an Addition: Title 24 Rules
  100. Duct Leakage Testing: When Is It Required Under Title 24?
  101. Refrigerant Charge Verification: When Is It Required?
  102. Airflow Verification: When Is It Required Under Title 24?
  103. MERV 13 Filter Sizing for Title 24
  104. HRV vs ERV for California Title 24 Compliance
  105. Whole-House Ventilation Fan Sizing Under Title 24
  106. Evaporative (Swamp) Cooler Under Title 24: Credit and Requirements
  107. Replacing a Packaged AC or Heat Pump Unit: What Title 24 Requires
  108. Window ACs, Wall-Sleeve Units and Portable Heat Pumps: Title 24?
  109. Can You Use Duct Tape on HVAC Ducts? What Title 24 Allows
  110. Do I Have to Replace My Old Ducts When I Replace My AC or Furnace?
  111. Ducts in Soffits and Conditioned Space: Do They Need Insulation?
  112. Flexible Duct Installation Rules Under Title 24
  113. Insulating Existing Ducts in the Attic: Required or Optional?
  114. Burying Attic Ducts Under Blown-In Insulation: What Title 24 Says
  115. Wall Furnace or Floor Furnace Replacement: What Title 24 Says
  116. Furnace or Air Handler in the Garage: Title 24 Rules for a Swap
  117. What Furnace Efficiency (AFUE) Does California Require?
  118. Can I Swap My Central AC for a Heat Pump? What Title 24 Adds
  119. Heat Pump With a Gas Furnace Backup: What Title 24 Requires
  120. How Big Can a Replacement AC or Heat Pump Be Under Title 24?
  121. Variable-Speed Heat Pump and a Smart Thermostat: Title 24 Rules
  122. How Many Heads Can a Mini-Split Have, and Does Adding One Trigger Title 24?
  123. Replacing Ducted Central Air With Mini-Splits: What Title 24 Asks
  124. Mini-Split in a Garage, Shed or Workshop: Does It Trigger Title 24?
  125. Installing a Mini-Split Yourself: What Title 24 Still Requires
  126. Cooling-Only Mini-Split or Heat Pump Mini-Split: What Triggers More?
  127. Refrigerant Line Set Insulation on an AC or Mini-Split: What the Code Requires
  128. Do I Need a Ventilation Fan if I Can Open My Windows? Title 24
  129. Can My Furnace Fan Provide Whole-House Ventilation? CFI Under Title 24
  130. Can Bathroom Exhaust Fans Serve as Whole-House Ventilation?
  131. Fresh-Air Intake and Supply-Only Ventilation: Filter and Access Rules
  132. 120-Volt or 240-Volt Heat Pump Water Heater: What Title 24 Allows
  133. Water Heater Blanket and Hot Water Pipe Insulation: Title 24 Rules
  134. Adding a Second Water Heater for a Far Bathroom: Title 24 Rules
  135. Repair or Alteration? When Fixing Something Does Not Trigger Title 24
  136. How Does Window Area Affect Title 24 Calculations?
  137. How Does a Heat Pump Change a Title 24 Calculation?
  138. How Does Water Heating Affect Title 24 Calculations?
  139. Does a Title 24 Calculation Require a Site Visit?
  140. How Does Insulation Affect Title 24 Calculations?
  141. How Does HVAC Efficiency Affect Title 24 Calculations?
  142. How Does Roof Type Affect Title 24 Calculations?
  143. How Do Solar Panels and Batteries Count in a Title 24 Calculation?
  144. How Do Duct Location and Leakage Affect Title 24 Calculations?
  145. Front Orientation on a Title 24 Report: Why It Matters and What Rotating the House Does
  146. How Do House Size, Stories and Bedroom Count Affect Title 24 Calculations?
  147. Building in Phases: How Title 24 Treats a Later Addition to a New or Recently Built House
  148. Recessed Lights Under Attic Insulation: IC-Rated, Airtight or Covered?
  149. Attic Hatch Insulation and Gasket: What Title 24 Requires
  150. Solar Tubes (Tubular Daylighting Devices): Title 24 Rules
  151. QII Wall Insulation Inspection: What the ECC-Rater Checks Before Drywall
  152. Are Double-Pane and Low-E Windows Required in California?
  153. Can a Radiant Barrier Replace Attic Insulation Under Title 24?
  154. QII for Attic Insulation: Rulers, Baffles, Hard Covers and Weight Checks
  155. Do I Need a Vapor Barrier in California? Crawl Space, Walls and Attics
  156. Coating a Flat Roof: Title 24 Rules for Liquid-Applied Roof Coatings
  157. Is a Blower Door Test Required in California? Title 24 Air Leakage Testing
  158. Brick, Block and Concrete Walls: Mass Wall Insulation Under Title 24
  159. Insulating the Wall Between the House and an Attached Garage
  160. Advanced Framing and 24-Inch Stud Spacing: How Title 24 Counts Wall Insulation
  161. Attic Insulation Certificate: What the Contractor Must Give You
  162. Air Sealing and the Air Barrier: What Title 24 Requires in a House
  163. Skylight Shaft Insulation: What Title 24 Expects Around the Light Well
  164. Kneewall Insulation Under Title 24: R-Value, Air Barrier and What QII Checks
  165. Window and Door Header Insulation: R-3, R-5 and the Four QII Header Designs
  166. Glass Block Windows Under Title 24: Defaults, Labels and Averaging
  167. Bay, Bow and Garden Windows Under Title 24
  168. Sealing Around Replacement Windows: What Section 110.7 Requires
  169. Rim and Band Joist Insulation: Where Title 24 Wants It
  170. Cantilevered Floors and Overhangs: Floor Insulation Under Title 24
  171. Mixing Window Types: How the Area-Weighted Average Works and What to Do When One Misses
  172. How Many Square Feet of Skylight Can I Add Under Title 24?
  173. QII Hard-to-Insulate Spots: Corners, Tub Walls, Bump-Outs and Steel Framing
  174. Where Window U-Factor and SHGC Appear: CF1R, Plan Set, Label and Installer Certificate
  175. Solar Roof Tiles and Shingles: Do They Need a Cool Roof Rating?
  176. Dynamic Glass and Electrochromic Windows Under Title 24
  177. 300 Sq Ft Addition Title 24 Requirements
  178. 500 Sq Ft Addition Title 24 Requirements
  179. 700 Sq Ft Addition Title 24 Requirements
  180. 1,000 Sq Ft Addition Title 24 Requirements
  181. Addition Over 1,000 Sq Ft: Title 24 Requirements
  182. Second-Story Addition: Ducts, Stairwell and Solar Under Title 24
  183. Primary Bedroom Addition Title 24 Requirements
  184. Kitchen Expansion Title 24 Requirements
  185. Family Room Addition Title 24 Requirements
  186. Sunroom Conversion Title 24 Requirements
  187. Patio Enclosure Title 24 Requirements
  188. Porch Enclosure Title 24 Requirements
  189. Carport Conversion Title 24 Requirements
  190. Basement Conversion Title 24 Requirements in California
  191. Attic Conversion to Living Space: Title 24 Requirements
  192. Bonus Room Over a Garage: Title 24 Requirements
  193. Shed Conversion to Living Space: Title 24 Requirements
  194. Detached Studio Conversion to Living Space: Title 24 Requirements
  195. Pool House Conversion to Living Space: Title 24 Requirements
  196. Guest House Conversion Title 24 Requirements
  197. Title 24 for Legalizing an Old Garage Conversion
  198. Whole-House Remodel Title 24 Checklist
  199. Kitchen Remodel: When Title 24 Is Triggered
  200. Bathroom Remodel: When Title 24 Is Triggered
  201. Remodel With New Windows and HVAC: Title 24 Checklist
  202. Remodel With New HVAC and Water Heater: Title 24 Checklist
  203. Remodel With New Insulation and Windows: Title 24 Checklist
  204. Remodel With Roof and Attic Insulation Changes: Title 24 Checklist
  205. Can Existing Windows Stay During a Home Addition?
  206. Can Existing HVAC Serve a New Home Addition?
  207. Can an Existing Water Heater Serve a New Addition?
  208. Home Addition With a Mini-Split: Title 24 Design Guide
  209. Home Addition With a Heat Pump Water Heater: Title 24 Guide
  210. Existing + Addition + Alteration: How the Performance Method Works
  211. Prescriptive vs Performance Compliance for Home Additions

Frequently Asked Questions

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