South Bay & Coastal
Building Design &
ADU Plans in Whittier
Whittier combines flat residential areas with hillside properties near the Puente Hills. We’ve designed projects throughout the city, handling both standard flat-lot ADUs and more complex hillside designs. The city’s building department is thorough and expects complete documentation.
Why Whittier Clients Work With Us
Whittier properties near the hills may require additional grading analysis and slope setback compliance. We evaluate these conditions during our initial consultation and incorporate them into the design from the start.
With 1,500+ projects completed across Los Angeles County since 2015, we bring a depth of experience that most firms can’t match. We don’t just know the California building code – we know how Whittier’s building department applies it.
Whittier’s eastern properties near the Puente Hills may involve hillside development standards and grading requirements.
Our Services in Whittier
ADU Design
Detached ADUs, garage conversions, junior ADUs, and two-story units. Permit-ready plans prepared for Whittier’s specific requirements.
Custom Home Design
Ground-up residential design from modern to traditional. Complete plan sets prepared for permitting.
Additions & Remodels
Room additions, second stories, kitchen and bath redesigns, whole-home renovations. Seamless integration with existing structures.
Plan Check Corrections
Plans stuck in review? We take over stalled projects, resolve code issues, and get permits approved.
Legalize Unpermitted Work
As-built documentation, code compliance analysis, and permit legalization for existing unpermitted additions and conversions.
Duplexes, Triplexes & Fourplexes
Duplexes, triplexes, and fourplexes, up to four units and two stories. Density analysis and code-compliant design.
Start Your Whittier Project
Free consultation. We’ll review your project and the permit path, then quote a flat fee in writing. No pressure, no obligation.