About L Square — Licensed ADU Design-Build in Orange County
A design-build studio that takes your ADU from first sketch to final inspection — all in-house, across Orange County and Los Angeles.
One team — architecture, permits and construction under one roof
L Square Design & Build is a licensed design-build studio based in Orange County, serving homeowners across Orange County and Los Angeles. We’ve completed 200+ projects, and we keep architecture, structural engineering, permitting and construction in-house.
That in-house model is the difference: one team, one contract, one point of accountability — so your accessory dwelling unit moves on a fixed schedule from first sketch to final inspection, with no gap between a separate architect and builder.
Licensed · Insured · Bonded · CSLB #1095476 · Orange County & Los Angeles
Who you work with
Brian Leung
Founder · General Contractor
CSLB-licensed General Contractor (#1095476) with an MBA from UC Irvine. Leads construction and business operations — keeping every build accountable, on schedule and on budget.
Kiko Zhou
Interior Designer · CA Real Estate Agent
Interior designer and licensed California real estate agent, UC Irvine. Brings design sensibility and local market expertise — so each ADU lives well and adds real property value.
What our clients say
Orange County homeowners review L Square on Google. Read what they say about working with our team — from design through final inspection.
Read our Google reviews→Build with a team
that owns the whole job.
Get a free, no-pressure quote from a licensed Orange County design-build studio — serving Orange County & Los Angeles.
