Title 24 Reports and Energy Calculations for Corona
Title 24 Calcs prepares permit-ready Title 24 energy reports for Corona. We cover new homes, ADUs, granny flats, room additions, remodels, and commercial projects. Most residential reports ship within 1–2 business days. Corona is part of our full California cities service area.
Title 24 Calcs operates from Corona, CA. We are familiar with the Corona Building and Safety Division's specific plan check requirements and the local construction market. Corona sits at the border of Riverside and Orange counties — a strategic location that makes it one of the Inland Empire's most active logistics, residential, and commercial permit markets.
Corona Title 24 — key facts:
• Provider: Title 24 Calcs prepares CF1R energy compliance reports for Corona
• Climate zone: Zone 10 — hot inland western Riverside County
• Building department: City of Corona Building and Safety Division — 400 South Vicentia Avenue, Corona, CA 92882
• Phone: (951) 736-2255 | Portal: City of Corona online permit portal
• 2025 code: In effect for all Corona permits submitted on or after January 1, 2026
• Starting price: $250 for eligible residential projects
• Turnaround: 1–2 business days for most residential reports
Corona Title 24 Climate Zone 10
Corona is in Climate Zone 10. Zone 10 covers most of western Riverside County. It is one of California's most demanding energy compliance zones. Summer temperatures regularly exceed 95°F. As a result, Zone 10 homes need higher insulation values than coastal California projects. They also need more efficient HVAC systems and larger solar PV arrays. The 91 Freeway and 15 Freeway corridors make Corona a hub for both residential and logistics permits.
The City of Corona Building and Safety Division at 400 South Vicentia Avenue handles all building permits. Title 24 energy compliance documentation must accompany the permit application at the time of permit submittal. We prepare CF1R reports and NRCC commercial forms formatted for Corona's permit portal. Because Title 24 Calcs operates from Corona, we have direct familiarity with the city's specific processes.
We confirm your exact climate zone by project address before starting any report. The California Energy Commission climate zone tool provides the official zone map. You can also view our full California Title 24 climate zones guide for zone-by-zone details.
We serve all cities in Riverside County. Nearby cities include Temecula, Murrieta, Rancho Cucamonga, Ontario, and Fontana. See the full cities index for all locations we cover.
CF1R Reports and HERS Testing in Corona
City of Corona Building and Safety Division requires a CF1R Certificate of Compliance for all residential permits that trigger Title 24. Title 24 Calcs prepares the CF1R using current CEC-approved software current to the 2025 code. We register it with an approved HERS provider before delivery so it is ready for permit submittal.
| CF1RCertificate of Compliance — submitted with the Corona permit application | CF2RCertificate of Installation — signed by the installing contractor in the field | CF3RCertificate of Verification — signed by a HERS Rater before final inspection |
HERS testing is mandatory for specific energy systems. A certified HERS Rater must verify duct leakage, heat pump refrigerant charge, ventilation flow rates, and battery readiness before issuing a certificate of occupancy. Your CF1R identifies all applicable HERS measures for your Corona project.
Title 24 Services for Corona Projects
New Home Construction in Corona
New single-family homes in Corona need a Title 24 new construction report for every permit submitted on or after January 1, 2026. Heat pumps are the prescriptive baseline for space and water heating. Solar PV and battery readiness provisions also apply to most new homes. We prepare the complete CF1R package. We register it and deliver it ready for permit submittal. See our residential new construction service page for full details.
Title 24 ADU, Granny Flat, and In-Law Unit Reports in Corona
Corona's established residential neighborhoods have seen strong ADU permit growth. This includes South Corona, Eastvale adjacent areas, and Norco-adjacent communities. Zone 10's demanding climate means ADU insulation and cooling requirements are more stringent than in coastal cities. A Title 24 ADU report is required for every new ADU, JADU, granny flat, or in-law unit submitted on or after January 1, 2026. The compliance path depends on how the project is classified. Title 24 Calcs confirms the correct classification before starting your report. See our ADU Title 24 service page for more information.
Room Additions and Alterations in Corona
Room additions that add conditioned floor area trigger Title 24 compliance. All new walls must meet Zone 10 insulation values. Ceilings and windows must also meet Zone 10 fenestration requirements. Additionally, HVAC replacement, window replacement, and water heater replacement may trigger a report. See our room addition service page and alteration service page for details. If you are unsure whether your Corona project needs a report, submit your project details and we will confirm before you pay.
Title 24 Compliance for Corona Remodels
Common triggers for Title 24 alteration reports in Corona include HVAC replacement, window replacement to meet Zone 10 U-factor minimums, heat pump water heater installation, and significant lighting changes. These scopes of work require energy compliance documentation at plan check submittal.
Commercial Title 24 Reports in Corona
Corona's commercial market centers on logistics and distribution facilities. These line the 91, 15, and 71 freeway corridors. Office and mixed-use projects are also active in the Crossings at Corona. We prepare NRCC-ENV, NRCC-MCH, and NRCC-LTI forms for all nonresidential project types in Corona. The 2025 code requires solar PV for most new nonresidential buildings. It also requires ASHRAE Guideline 36 controls for VAV systems.
Frequently Asked Questions — Title 24 Corona
Which building department handles permits in Corona?
City of Corona Building and Safety Division at 400 South Vicentia Avenue, Corona, CA 92882. Phone: (951) 736-2255. Permits submit through the City of Corona online permit portal. Title 24 energy compliance documentation must accompany the permit application at the time of permit submittal.
What Title 24 climate zone is Corona in?
Corona is in Climate Zone 10 — a hot inland western Riverside County climate. Zone 10 has specific insulation, window performance, HVAC efficiency, and solar PV requirements. We confirm your exact zone by project address before starting any report.
What is HERS testing and is it required in Corona?
HERS testing is third-party field verification of energy systems. In Corona, a certified HERS Rater must verify duct leakage, heat pump refrigerant charge, and ventilation flow rates before the building department issues your certificate of occupancy. Your CF1R identifies the applicable measures.
Do I need a Title 24 report for an ADU or granny flat in Corona?
Yes. All new ADUs, JADUs, granny flats, and in-law units submitted on or after January 1, 2026 require a Title 24 report in Corona. Title 24 Calcs confirms the correct compliance path before starting your report.
How much does a Title 24 energy report cost in Corona?
Pricing starts at $250 for eligible residential projects. All pricing includes HERS registration, plan-sized PDFs, and revision support. See our pricing page for current rates.
How long does it take to get a Title 24 energy report in Corona?
Most residential reports for Corona projects are delivered within 1–2 business days after we receive complete plans. Commercial reports typically take 2–3 business days. Rush options are available for urgent submittals.