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Get Accurate California Roofing Code Reports Instantly

From Wildfire Zones to Cool Roof Mandates

Up‑to‑date California roofing code reports, covering Title 24 cool‑roof requirements, permit thresholds, wind/hail zones, and energy‑efficiency mandates.

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California Roofing Code Highlights

Permit Thresholds

  • Most California properties require permits for reroofing, deck replacement, or structural alterations.
  • OneClick Code shows address‑specific permit fee calculation & rules instantly by address.

Underlayment & Roof Decking Requirements

  • CRC/CBC require solidly sheathed decks, proper underlayment materials (ASTM D226, D4869), and nail/fixing schedules. 
  • Details vary for slopes 2:12 to 4:12, or second‑layer overlays.

Cool Roof & Title 24 Compliance

  • Title 24 Part 6 mandates cool roof metrics (solar reflectance, thermal emittance, SRI) in many climate zones.
  • Some regions require cool roofs when >50% of the roof is replaced.

Key California Counties/Regions for Roofing Contractors

High-impact zones

California’s major metropolitan counties each present their own unique roofing challenges, shaped by coastal exposure, wildfire activity, and diverse climate zones. Roofers working across these regions must navigate shifting Title 24 cool-roof requirements, wildland fire regulations, and local permitting rules that vary street by street.

  • Los Angeles County: A blend of coastal wind exposure and significant wildfire risk, where many communities fall within Very High Fire Hazard Severity Zones (VHFHSZ) and must meet strict Class A roofing and WUI standards.
  • Orange County: Known for stringent cool-roof requirements especially for low-slope residential structures and varied slope/energy thresholds based on the climate zone.
  • San Diego County: Roofing projects often sit at the intersection of coastal corrosion exposure and inland fire-hazard zones, requiring careful material selection and fire-resistant assemblies.
  • Sacramento County: A mixed-climate region where energy-efficiency standards and hail-resilience considerations influence reroofing choices and permitted assemblies.
  • Contra Costa County: Frequently subject to cool-roof mandates along with widespread VHFHSZ designations, making dual compliance (energy + fire) a regular requirement for contractors.

OneClick Code delivers jurisdiction-specific roofing code reports across all major California metropolitan areas, providing contractors with instant clarity on high-risk zones, Title 24 mandates, cool-roof thresholds, and local permit triggers ensuring every project begins with accurate, compliant data.

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Why California Roofing Codes Are Complex

California’s roofing landscape includes wildfire risk, extreme heat, coastal wind/hail zones, and strict energy‑efficiency laws. The statewide code is the California Building Standards Code (Title 24), which covers residential and commercial roofs. Local jurisdictions often adopt additional fire, slope, and energy amendments, meaning roofing contractors must check both state and local codes with OneClick Code.

Wildfire & Very High Fire Hazard Severity Zones (VHFHSZ)

  • In fire‑prone areas (e.g., California wildland‑urban interface), roofing must meet Class A fire ratings and other fire‑resistant specs.
  • Proper roof covering selection, spark arrestors, and flashing are vital for compliance.
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Cool Roof & Energy Efficiency Requirements

  • Under Title 24 Part 6, California requires cool roof materials (high solar reflectance, aged SRI) when re‑roofing or in new construction.
  • Compliance depends on climate zone and roof slope; many jurisdictions adopt stricter local mandates.
Insurance ready with every report.

Wind, Hail & Coastal Exposure

  • Roof decks and coverings must comply with load/resistance standards (e.g., CRC R905 / CBC §1507).
  • Hail-prone regions require stronger attachment, underlayment, or specific material ratings.
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Your All-in-One Solution

OneClick Code

OneClick Code delivers instant, jurisdiction-based roofing code reports for every address in California, giving contractors immediate clarity on the correct code edition, wildland and fire-hazard classification, permit fee calculations, wind or hail exposure, underlayment and deck specifications, and any applicable Title 24 cool-roof requirements. Designed for California’s complex mix of coastal, mountain, and wildland jurisdictions, OneClick Code streamlines the entire compliance process so roofers can bid faster, avoid costly mistakes, and ensure every project meets state and local roofing standards.

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Why California Roofers Choose OneClick Code

01

Accurate Estimates

Stop guessing. Base every estimate on verified, jurisdiction-specific California roofing codes, including Title 24 cool-roof requirements, wildfire/WUI mandates, and local jurisdiction rules.

Increased accuracy in estimates and projects
02

Reduced Risk of Code Violations & Fines

Ensure your roofing system meets California's stringent energy-efficiency, fire-resistance, and climate-zone requirements even in areas with mixed or overlapping regulations.
Lower risk of failed inspections, rework, and costly penalties.

Reduced risk of code violations and fines
03

Faster Project Timelines

Leverage smart calculators, automatic climate-zone identification, and built-in code citations to speed up quoting, permitting, and compliance checks.
Improved efficiency and smoother scheduling from start to finish.

Improved project efficiency and timelines
04

Professional, Client‑Ready Reports

Deliver defensible, well-documented roofing code data to homeowners, adjusters, inspectors, and insurers for estimate review.
Build trust with clear communication and a professional presentation.

Enhance your professional credibility and client trust.

Frequently Asked Questions

Do I need a permit for roofing in California?

Yes. Most reroofing, roof replacements, and roof recovery projects in California require a permit. Local building departments enforce the California Building Code (CBC) and California Residential Code (CRC), and many jurisdictions trigger additional requirements when more than 50% or 2,000 sq. ft. of the roof is replaced. Always verify these details as some areas also require documentation for energy compliance or wildfire-resistant construction.

What are the cool‑roof requirements under Title 24?

Under California’s Title 24, Part 6 Energy Code, many climate zones require cool-roof materials particularly for low-slope residential roofs and certain steep-slope reroofs. These materials must be CRRC-rated and meet specific thresholds for aged solar reflectance, thermal emittance, or Solar Reflectance Index (SRI). Requirements depend on roof slope, climate zone, and the percentage of roof area being replaced, so compliance varies by specfic address.

How do I know if my property is in a VHFHSZ or wildland‑fire zone?

Properties in Wildland-Urban Interface (WUI), Fire Hazard Severity Zones (FHSZ), or Very High Fire Hazard Severity Zones (VHFHSZ) are identified by CAL FIRE and local governments. These zones require enhanced fire-resistant roofing systems, typically Class A assemblies. Determining zone status can be time-consuming, as boundaries change and municipalities may adopt stricter overlays making address-specific verification with OneClick Code essential.

Can OneClick Code calculate permit fees for my California address?

Yes. OneClick Code identifies the correct jurisdiction for your project and can automatically calculate permit fees using our Permit Fee Calculator. Your address-specific report includes permit expectations, code triggers, and any special compliance requirements streamlining both your estimates and your permitting workflow.

For California Roofers

Stay compliant across every jurisdiction, whether you’re working in Los Angeles, Sacramento, San Diego, or the Bay Area, OneClick Code brings clarity to California’s complex roofing landscape.

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