R&Y CO.
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Lic. CSLB · CA
RAMIREZ & YANG CO.
SINCE 1994 · LOS ANGELES
№ 001
RAMIREZ
& YANG CO.
Modern approach. Classic results.
SoCal's premier ADU builder
I — PRACTICE

Southern California's premier ADU builder. Drawings and field execution under one license — two disciplines, one standard, end to end on every ADU.

II — Standing
FIG. 02
01
Building in SoCal · est. 1993
0
yr.
02
Completed ADUs + residential projects
0
03
SoCal cities served
0
04
Sign-to-keys · typical ADU
9–12
mo.
III — Territory
FIG. 03 · MAP

Where we've built
since 1993.

1995
0 / 42 PROJECTS
0 CITIES
95
00
05
10
15
20
25
NP A C I F I CLOS ANGELESSAN BERNARDINOORANGERIVERSIDE
Awaiting plot
IV — Founder

Engineering rigor.
Construction craft.
One standard.

Founder · 01
SYSTEMS · BUILD
PORTRAIT · YANG
Yang
Software engineer + GC · Systems lane
CA Lic. GC (B)Design exp.Founding Eng. · TexturaAcq. Oracle

Engineering rigor applied to ADU operations. Founding engineer at Textura, the construction-finance platform later acquired by Oracle that processes billion-dollar-monthly volume for general contractors and developers nationally. A licensed General Contractor in California (Class B) with hands-on design experience, Yang owns the ADU design-build seam end-to-end — feasibility sketch through final inspection, no handoff between phases, no detail lost in translation. The engineering background runs the quality side: ADUs built to pass inspection the first time, not after corrections. At R&Y, Yang owns scheduling, draw management, and financial transparency: every client sees the same dashboards we do — milestones, line items, pending change orders, and where the money is, in real time. ADU specialists. Engineering for quality and reliability. Design for one process, sketch to keys.

V — Flagship ADU Build
Walnut, CA · 2020

Walnut 2020
RENOVATION + 700 SF ADU

COVER · WALNUT 2020
Scope
Full renovation + detached ADU
Area
2,140 sf main 700 sf ADU
Duration
11 months sign to keys
Role
Design–build A + GC

A 1962 single-story ranch on a deep lot in Walnut. We reorganized the main residence around a recovered north–south axis, then sited a detached one-bedroom ADU at the rear, preserving three mature California pepper trees and the original concrete drive.

Engineered shearwalls and a continuous load path resolved the structural changes without exposed steel. The two volumes are linked by a decomposed-granite courtyard that doubles as fire-department access.

Gallery · 06 PLATES
← SWIPE
VI — ADU & Renovations
VI

ADU & Renovations

ADU & RENOVATIONS

Detached and attached accessory dwellings, additions, and whole-house remodels. We carry every project from feasibility through final inspection — drawings and field execution under one license.

Archive
09 ITEMS
AR-01
AR-02
AR-03
AR-04
AR-05
AR-06
AR-07
AR-08
AR-09
IX — Office

Diamond Bar.
California.

  • D-01
    DIAMOND BAR
    1370 Valley Vista Drive, Suite 200, Diamond Bar, CA 91765
X — Begin

Schedule a feasibility call.

Pick a time that works for you. We'll review your project together, no obligation.

Call(909) 551-4566
RAMIREZ & YANG CO.
ADU Specialists · Building since 1994
№ 001
Practice
  • Work
  • Founder
  • Process
Licensure
  • CSLB #1157101
  • OSHA 30
  • EPA RRP
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The work speaks.
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