Pasadena combines historic homes with new ADUs and additions in the San Gabriel Valley area of Los Angeles County.
Pasadena is in Climate Zone 9 — one of Southern California's hotter inland zones where summer temperatures regularly exceed 95°F. Title 24 energy budgets here emphasize cooling load reduction through insulation, window specs, and high-efficiency HVAC.
Pasadena has its own building department — the Pasadena Building and Safety Division. We format every report for Pasadena plan check submission.
We prepare Title 24 reports for all project types in Pasadena:
- 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 Los Angeles County communities and cities throughout California.
Title 24 Projects in Pasadena
Pasadena's residential character comes from its older homes — Craftsman bungalows, period revival houses and early twentieth-century neighborhoods, several of them designated historic or landmark districts — along with apartment buildings and bungalow courts near the city's commercial corridors. Much of the work here is about adapting those houses rather than replacing them: rear additions, detached ADUs and garage conversions, kitchen and bath remodels that open up walls, and replacing old furnaces and wall units.
That older construction shapes the energy model. Many homes have raised wood floors, uninsulated walls, original wood windows and ducts in an unconditioned attic or crawlspace. In a hot Climate Zone 9 summer, those details matter, especially when the design adds a large glass wall or a second story. Keeping original windows on a historic facade can be balanced with stronger insulation, better new windows elsewhere or more efficient equipment, and the performance approach lets the model test those options. Historic design review, where required, is a separate city process from the Title 24 report.
See Title 24 requirements for how each part of the house is evaluated, and ADU Title 24 reports for backyard units.
Region, climate zone and nearby cities
Pasadena is part of our Los Angeles County and Southern California coverage and is listed in Climate Zone 9; your address and ZIP code set the exact zone. We also serve Glendale, Burbank and El Monte.
