Mission Viejo vs Santa Ana
How do green building code rules compare between Mission Viejo, CA and Santa Ana, CA?
Mission Viejo and Santa Ana have similar restriction levels.
Mission Viejo, CA
Orange County
Orange County enforces the California Green Building Standards Code (CALGreen) for all new construction and major remodels, requiring water efficiency, construction waste diversion, and indoor air quality measures verified at permit close-out.
View full Mission Viejo rules →Santa Ana, CA
Orange County
Santa Ana adopts the California Green Building Standards Code, known as CALGreen, through SAMC Chapter 15. New construction and major remodels must meet mandatory energy, water, waste, and indoor air-quality measures verified during plan check and inspection by Building Safety.
View full Santa Ana rules →Key Facts Comparison
| Fact | Mission Viejo | Santa Ana |
|---|---|---|
| Code basis | Title 24 Part 11 | - |
| Waste diversion | Fifty percent minimum | - |
| Water fixtures | Low-flow required | - |
| Verification | HERS rater | WMP and inspector checklists |
| Code part | - | Title 24 Part 11 CALGreen |
| Construction waste | - | 65 percent diverted minimum |
| EV-ready | - | All new homes |
Highlighted rows indicate differences between cities.
Mission Viejo FAQ
Does CALGreen apply to small remodels?
Yes, additions and remodels are covered, with mandatory measures scaled to the scope. Re-roof, water heater, and HVAC replacements have specific Title 24 energy requirements.
Where do I dispose of construction debris to count toward diversion?
Use OC-permitted Construction and Demolition recycling facilities. Contractors must keep weight tickets and submit a final diversion report to the building department.
Santa Ana FAQ
Does CALGreen apply to small remodels?
Many measures apply only to new construction and additions, but plumbing fixture replacement at the time of sale must meet flow limits under SB 407, even for older homes.
Can my project exceed CALGreen mandatory levels?
Yes. Voluntary Tier 1 and Tier 2 measures, LEED, or Build It Green certification can earn density-bonus or expedited-permit benefits in some Santa Ana projects.
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