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New construction · Walnut Creek

How do Title 24 and CALGreen affect new construction in Walnut Creek?

Walnut Creek is in California Energy Code Climate Zone 12. Title 24 sets the envelope, HVAC, and renewable requirements; CALGreen sets the green-building baseline. Both are enforced by City of Walnut Creek Community Development Department — Building Division at plan check and inspection.

What changes the answer in Walnut Creek.

California Energy Commission Climate Zone 12. New single-family homes must comply with the current Title 24 Part 6 envelope, HVAC, hot-water, and rooftop solar-PV requirements. CALGreen Part 11 mandatory measures (≥65% C&D waste diversion, water-efficient fixtures, indoor-air-quality measures) apply to all new homes. Walnut Creek may layer reach-code or local green-building amendments — confirm the current adopted ordinance at intake.

  • Climate Zone 12 compliance pathway
  • California Energy Commission Climate Zone 12. New single-family homes must comply with the current Title 24 Part 6 envelope, HVAC, hot-water, and rooftop solar-PV requirements.
  • CALGreen Part 11 mandatory measures (≥65% C&D waste diversion, water-efficient fixtures, indoor-air-quality measures) apply to all new homes. Walnut Creek may layer reach-code or local green-building amendments — confirm the current adopted ordinance at intake.
  • Strong California solar resource; Title 24 PV sizing is calculated per conditioned floor area and orientation.

Source-backed note

Title 24 Part 6 (energy) and CALGreen are state-mandated baselines; local ordinances frequently add reach-code amendments such as all-electric requirements.

Reference: California Energy Code (Title 24, Part 6) — California Energy Commission

Local authority: City of Walnut Creek Community Development Department — Building Division

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