Title 24 HERS, Permits & Final Inspections in Tustin
CHEERS-certified HERS / ECC Rating, mechanical/electrical/plumbing permit expediting, and final inspections in Tustin. Same-day field results. We work with the City of Tustin Building Division weekly - Tustin Ranch and Tustin Legacy to Old Town Tustin, plus the older neighborhoods around Newport Avenue and First Street.
Tustin is one of our top Orange County cities by volume.
Tustin is the #7 city in our permit history overall - small geographically, but dense with the kind of work we do. The volume splits cleanly between two zip codes: 92782 (Tustin Ranch, Tustin Legacy, and the newer master-planned neighborhoods east of the 55) and 92780 (downtown Tustin and the older historic neighborhoods around Old Town). The 92782 side is mostly newer construction, ADUs, and mid-cycle HVAC work; the 92780 side skews toward remodels, additions, and Title 24 alterations on older homes that need careful duct sealing and refrigerant verification. Tustin is on our regular Orange County route, off the 5 and the 55.
Working with City of Tustin Building Division
- Department: City of Tustin Building Division
- Address: 300 Centennial Way, Tustin, CA 92780
- Phone: (714) 573-3130
- Permit submittals email: [email protected]
- Submission methods: Email Submission, In-Person Counter
- Counter hours (typical): Monday to Thursday, 7:30 AM to 5:30 PM, with alternate Fridays (the city is closed every other Friday). The building counter sometimes runs shorter hours or by appointment - always confirm before showing up.
One useful operational detail about Tustin: it's one of the few Orange County cities that use email submission as a primary intake channel, rather than a strict online portal or counter-only model. That can save a counter trip on simple MEP scopes - if you know the right address ([email protected]), the right packet structure, and how the city likes corrections returned. We pull mechanical, electrical, and plumbing permits through this email workflow regularly, run plan-check correction cycles, and coordinate the final inspection with the city inspector and the homeowner. For projects that need a person in the room, the counter at 300 Centennial Way is the backup.
What we do in Tustin
- Title 24 HERS / ECC Rating testing - duct leakage, refrigerant charge, cooling coil airflow, fan efficacy. CF1R / CF2R / CF3R prepared and registered with CHEERS, at no additional charge.
- Permit expediting - mechanical, electrical, plumbing. Email submission or counter, whichever the city wants for the scope. Plan-check corrections handled.
- Final inspections & closeout - we set up the final with the City of Tustin and the homeowner, confirm both are available, brief the homeowner on what the inspector will want to see, and hand off the HERS test and permit packet. When roof or attic access is needed, we drop a single-story ladder in the morning and pick it up that afternoon.
Climate Zone 8 - what it means for your test
Tustin sits in California Climate Zone 8 - the inland Orange County zone that also covers Irvine, Santa Ana, Orange, Anaheim, and most of central OC. The exact zone is set by the California Energy Commission and depends on the project address. Climate zone affects which Title 24 prescriptive paths apply and which HERS / ECC measures your project needs to verify. CZ 8 is hotter than the coastal zones to the west, so envelope and HVAC measures (duct leakage, refrigerant charge, fan efficacy) are typically the focus rather than the heating-driven measures you'd see in higher-altitude inland zones. We confirm the zone and the specific measures for your address before quoting.
Frequently asked - Tustin
When does Title 24 require HERS / ECC testing for a Tustin project?
For most permitted work that touches energy systems, yes. HVAC alterations - replacing a coil, condenser, furnace, or more than 40 feet of ducting - typically require duct leakage testing and refrigerant charge verification. New construction and ADUs almost always require multiple HERS measures, and Tustin sees a lot of both: ground-up homes in Tustin Legacy and Tustin Ranch, plus ADU additions on the older lots near Old Town. Window replacements, insulation upgrades, and water-heater swaps may trigger HERS depending on scope. The City of Tustin Building Division plan check will tell you what's required when they review your permit; we can also confirm before you submit.
Do you also work in cities adjacent to Tustin?
Yes. Irvine, Santa Ana, Orange, Costa Mesa, and Newport Beach are all on our regular Orange County route - separate building departments, but we know each one. We also cover unincorporated North Tustin, which shares the 92705 zip with parts of Tustin and Santa Ana but is actually under Orange County's jurisdiction (not the City of Tustin) - that's a common gotcha and we handle it. If you have permits pulled in one city and a final scheduled in another, we coordinate both.
What's the typical permit-to-closeout timeline in Tustin?
For a standard MEP permit (HVAC change-out, electrical service upgrade, water heater swap), figure roughly 1 to 2 weeks from submittal to permit issuance - Tustin accepts email submission for most MEP work, which can move faster than counter-only cities once you know the workflow. The HERS / ECC test happens once installation is done, with same-day field results. Final inspection scheduling adds another 2 to 10 business days depending on inspector availability. Most simple projects close out within 4 to 6 weeks total. ADUs and additions take longer because of plan check.
How fast can ERE finish a HERS test in Tustin?
Same-day field results in your inbox the day of the test, and CF3R registered with CHEERS. Booking lead time is typically less than a week - Tustin is on our regular Orange County route and we can usually slot in a test within 2 to 5 business days.