About YDS Architects
We draw lines. Then make them real.
YDS Architects is a Los Angeles–based architecture studio grounded in smart design and stress-free approvals. We specialize in ADUs, multifamily housing, and commercial architecture that works within the complexity of Southern California’s zoning — not against it.
Our team of Big Thinkers
Yifu Pan
Principal Architect & Founder
Wayne Pickerel
Vice President
YDS Architects
YDS Arch is a Southern California–based architectural practice founded by principal architect Yifu Pan, AIA. Established with a focus on accessory dwelling units, the firm quickly developed a reputation for navigating Los Angeles’ complex permitting landscape with precision and clarity.
Today, we work with homeowners, developers, and business owners across Los Angeles, Monrovia, Pasadena, and the wider SCAG region. Our work spans duplexes, fourplexes, small-lot subdivisions, and urban infill housing, guiding projects through SB9, SB684, density bonus programs, and evolving state legislation.
Our approach is grounded in efficiency and thoughtful design. We deliver clear feasibility analysis, planning strategy, and approval-ready documentation, equipping our clients with the information needed to move forward with confidence.
Frequently Asked Questions
No — while our studio is based in Monrovia, we serve clients across Los Angeles, Pasadena, the South Bay, and the broader SCAG region.
Yes. We specialize in zoning analysis and permitting for ADUs, SB9 lot splits, CUP and SB1211, SB684, and more for multifamily projects. Our team manages everything from planning to permit submission.
Absolutely. We offer free consultations and lot studies to evaluate if your property qualifies under SB9 or other zoning incentives like density bonus programs
Both. We’ve worked with first-time homeowners, seasoned real estate investors, and developers on a range of residential and commercial projects.
Yes. If your design is already handled or you’re working with a separate designer or expeditor, we’re happy to provide permitting-only services. We also offer full design-to-permit support for most projects — ensuring your plans meet code, zoning, and city requirements from the start, so you’re ready to submit your construction documents with confidence.