San Gabriel Valley
Building Design &
ADU Plans in San Marino
San Marino is one of the most prestigious residential communities in the San Gabriel Valley, with large lots and high architectural standards. The city’s planning department maintains strict design guidelines, and projects here require a level of detail and quality that many firms can’t deliver. We’ve worked with San Marino’s review process and understand what they expect.
Why San Marino Clients Work With Us
San Marino’s large lot sizes create exceptional ADU opportunities, but the city’s design standards require careful attention to architectural character and site planning. We design units that meet both code requirements and the community’s qualitative expectations.
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 San Marino’s building department applies it.
San Marino’s design review process evaluates architectural compatibility and quality beyond basic code compliance.
How review works in San Marino
San Marino reviews ADUs and additions through its Community Development Department. Permit applications are filed online through CommunityConnect, and over-the-counter plan review is offered at City Hall on Tuesdays. The City’s ADU provisions are posted on its Planning page as Ordinance No. O-24-1416. All new homes, certain one-story additions and all two-story additions typically go to the Design Review Committee. State law gives the City 60 days from a complete application to decide on an ADU, and 30 days on a pre-approved plan. We submit to San Marino the same way we submit everywhere: a complete set, the corrections answered in writing, and the permit carried through issuance.
Our Services in San Marino
ADU Design
Detached ADUs, garage conversions, junior ADUs, and two-story units. Permit-ready plans prepared for San Marino’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 San Marino Project
Free consultation. We’ll review your project and the permit path, then quote a flat fee in writing. No pressure, no obligation.