The City of Orange blends historic neighborhoods with new ADU and residential construction in central Orange County.
Orange sits in Climate Zone 8 in central Orange County. Title 24 energy reports for Orange projects follow Zone 8 standards with emphasis on cooling efficiency, window performance, and 2025 solar requirements.
Orange projects are reviewed by the City of Orange Building Division. We format every report for Orange submission.
We prepare Title 24 reports for all project types in Orange:
- 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 Orange County communities and cities throughout California.
Title 24 Projects in Orange
The City of Orange is known for Old Towne, a large historic district of late nineteenth- and early twentieth-century homes, surrounded by postwar neighborhoods and, to the east, hillside and large-lot areas toward the foothills. Each part of the city generates a different kind of Title 24 project.
In and around Old Towne, the work is usually rear additions, detached ADUs and careful remodels of older bungalows. These houses often have raised wood floors, original wood windows and little wall insulation. When an addition is modeled with the existing house, those details matter, and keeping original windows for historic reasons may mean the addition's insulation, glazing or equipment has to do more. Historic design review, where it applies, is a separate city process from the energy report.
In the postwar neighborhoods, garage conversions, JADUs and HVAC or window upgrades are more typical. On the east side, larger custom homes and additions on sloped lots bring more glass and more complex roof and floor assemblies into the model. Our guide to Title 24 requirements explains how each part of a building is evaluated, and home addition reports covers additions specifically.
Region, climate zone and nearby cities
Orange is part of our Orange County and Southern California coverage and is listed in Climate Zone 8; your ZIP code sets the exact zone. We also serve Anaheim, Santa Ana and Tustin.
