San Gabriel Valley
Building Design &
ADU Plans in Hacienda Heights
Hacienda Heights is an unincorporated LA County community, which means projects here go through the County of LA’s building and safety department rather than a city building department. We have extensive experience with LA County plan check and understand the county’s specific requirements, forms, and review processes.
Why Hacienda Heights Clients Work With Us
Unincorporated communities like Hacienda Heights offer the advantage of county-level ADU provisions, which can be more favorable in some cases than individual city standards. We know how to leverage these provisions for our clients.
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 Hacienda Heights’s building department applies it.
As an unincorporated LA County area, Hacienda Heights projects go through the County building department, where we have extensive submission history.
How review works in Hacienda Heights
Hacienda Heights is an unincorporated community, so ADUs and additions there are reviewed by Los Angeles County: LA County Planning and Public Works Building and Safety. Plans are submitted through EPIC-LA, the County’s online permitting portal for the unincorporated areas. The County’s Pre-Approved ADU Standard Plans Program offers plans pre-approved by both Regional Planning and Public Works Building and Safety. State law gives the County 60 days from a complete application to decide on an ADU, and 30 days on a pre-approved plan. We submit to Los Angeles County the same way we submit everywhere: a complete set, the corrections answered in writing, and the permit carried through issuance.
Our Services in Hacienda Heights
ADU Design
Detached ADUs, garage conversions, junior ADUs, and two-story units. Permit-ready plans prepared for Hacienda Heights’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 Hacienda Heights Project
Free consultation. We’ll review your project and the permit path, then quote a flat fee in writing. No pressure, no obligation.