Ontario is a fast-growing San Bernardino County city in the Inland Empire with strong residential and multifamily activity.
Ontario sits in Climate Zone 10 where the Inland Empire's hot climate drives strong Title 24 requirements for cooling efficiency, envelope insulation, and solar PV compliance under the 2025 code.
Ontario projects are reviewed by the City of Ontario Building and Safety Division. We format every report for Ontario submission.
We prepare Title 24 reports for all project types in Ontario:
- New single-family home construction
- Room additions of any size
- ADUs and Junior ADUs including garage conversions
- Remodels and alterations affecting insulation, windows, or mechanical systems
- Multifamily duplexes, triplexes, and fourplexes
- HVAC replacement projects
- Window replacement projects
We also serve all surrounding San Bernardino County communities and cities throughout California.
