Quick Answer: California Title 24 is the California Building Energy Efficiency Standards — it sets minimum energy performance requirements for all new construction and substantial renovations in California. For a Bay Area homeowner, Title 24 affects your renovation in several ways: (1) New windows in a permitted renovation must meet minimum U-factor and solar heat gain coefficient (SHGC) requirements — typically ENERGY STAR certified windows with U ≤ 0.32 and SHGC ≤ 0.25; (2) New HVAC equipment must meet minimum SEER2/HSPF2 ratings; (3) New lighting must use LED fixtures with minimum efficacy (all new residential lighting must be high-efficacy LED); (4) Insulation must meet minimum R-values (R-13 walls, R-19 floors, R-38 ceiling/attic); (5) Any addition over 500 sq ft may require a full Title 24 compliance report prepared by a CEPE (Certified Energy Plans Examiner).
Title 24 Requirements That Affect Bay Area Renovations 2025
Helpful Resources:
| Element | Title 24 Requirement (2022 code, effective Jan 2023) |
|---|---|
| Windows (Climate Zone 3 — most of Bay Area) | U-factor ≤ 0.30, SHGC ≤ 0.23 for prescriptive compliance |
| Wall insulation | R-15 minimum for new framed walls in alterations (2022 code) |
| Attic/ceiling insulation | R-38 minimum for ceiling below attic |
| HVAC (heat pump) | HSPF2 ≥ 7.5 for mini-splits; must use heat pump for new HVAC in most additions |
| Water heating | Heat pump water heaters required for most new construction and additions; solar water heating also compliant |
| Interior lighting | All new luminaires must be high-efficacy (LED, minimum 45 lumens/watt) |
| EV charging | New additions and ADUs with garages require EV-ready conduit to parking |
Quartz Construction’s project managers handle Title 24 compliance documentation on all San Jose renovation and addition projects. We work with a certified energy plans examiner (CEPE) to complete compliance reports when required by the permit. CSLB #1003436 | Call (650) 749-7436.
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Quartz Construction & Remodeling | CSLB #1003436 | Licensed, Bonded & Insured
Phone: (650) 749-7436
Address: 1777 Hamilton Ave #1080, San Jose, CA 95125
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