Design 1
Los Angeles County

Where Vision
Meets Structure

Decade-proven expertise in residential and commercial building design. Over 1,500 projects delivered across Los Angeles County — from custom homes to multi-family developments to ground-up commercial spaces.

Call (626) 214-5929 View Our Work
Scroll
10+
Years in Business
1,500+
Projects Completed
LA
County-Wide Service
100%
Project Completion Rate
About the Studio

Built on a Decade
of Delivering

Design 1 Studio didn't become one of LA County's most trusted design firms by accident. For over ten years, we've been the team that owners, developers, and investors call when the project has to be done right — and done completely. We don't walk away. We don't hand off. We see every single project through from first concept to final approval.

While other firms come and go, we've remained a constant in this industry because we understand something fundamental: your project is your livelihood, your investment, your future. We treat it that way. With over 1,500 residential and commercial projects behind us, we bring the kind of experience that can't be faked or fast-tracked.

We're not a one-person operation working out of a spare bedroom. Design 1 Studio Inc. is a fully established, incorporated design firm with the track record, the expertise, and the staying power to prove it.

Custom Craftsman home designed by Design 1 Studio
"We don't start projects. We finish them."
Our Work

A Decade of
Delivered Projects

From modern ADUs to Spanish Revival estates, every project reflects our commitment to thoughtful design and meticulous execution.

Modern detached ADU with wood and stucco exterior

Modern Detached ADU

Accessory Dwelling Unit

Contemporary ADU with concrete and wood slat design

Contemporary ADU

Ground-Up Design

Mid-century modern inspired ADU with glass walls

Mid-Century Inspired

Detached Unit

Modern two-story ADU

Two-Story ADU

Multi-Level Design

California Ranch style detached ADU

California Ranch ADU

Detached Accessory Dwelling Unit

Craftsman-style detached ADU

Craftsman-Style ADU

Custom Design

Modern flat-roof ADU with large sliding doors

Modern Flat-Roof ADU

Accessory Dwelling Unit

Traditional style detached ADU

Traditional ADU

Detached New Construction

Completed detached accessory dwelling unit

Completed ADU

Residential Design

Detached ADU design

Detached ADU

New Construction

Newly constructed ADU

New Construction

Permit-Ready Design

What We Do

Full-Scope Design
Services

From initial sketches to permit-ready construction documents, we handle every phase of the design process for residential and commercial projects throughout Los Angeles County.

01

Custom Home Design

Ground-up residential design for single-family homes, from modern minimalist to Mediterranean revival. Complete plans engineered for LA County permitting and construction.

02

ADU & Guest House Design

Pioneers in Accessory Dwelling Unit design since California's landmark legislation. Garage conversions, detached units, and junior ADUs — we've done them all, hundreds of times over.

03

Multi-Family & Multi-Story

Duplexes, triplexes, apartment buildings, and mixed-use developments. We understand density, zoning, and how to maximize value on every square foot of your lot.

04

Commercial Tenant Improvements

Restaurants, retail, offices, and industrial spaces. We create functional commercial environments that meet code requirements and reflect your brand identity.

05

Home Remodels & Additions

Room additions, second stories, kitchen and bath redesigns, and whole-home renovations. We seamlessly blend new construction with existing structures.

06

Permit & Plan Check

We prepare complete construction document packages and navigate the plan check process with LA County, City of LA, and surrounding jurisdictions. No surprises, no delays.

ADU Specialists

LA's Most
Experienced
ADU Design Firm

When California passed its groundbreaking ADU legislation, most firms were scrambling to figure out the rules. We were already drawing plans. Design 1 Studio was among the very first to specialize in Accessory Dwelling Units, and we've been at the forefront of every regulatory update since.

From 400-square-foot junior ADUs to two-story detached units, from garage conversions to new construction — we've designed hundreds of ADUs across virtually every city and jurisdiction in LA County. We know the setbacks, the height limits, the parking exemptions, and the utility requirements inside and out.

2017
Designing ADUs Since
100s
ADU Projects Completed
Modern ADU designed by Design 1 Studio
Mid-century ADU design
Our Process

Start to Finish

Every project follows our proven four-phase process — a system refined over ten years and 1,500+ projects to eliminate guesswork and keep your build on track.

I

Consultation

We listen first. Free initial consultation to understand your vision, evaluate your property, and discuss feasibility, budget, and timeline.

II

Concept Design

Preliminary layouts, site plans, and design concepts developed in close collaboration with you. We refine until it's exactly right.

III

Construction Documents

Complete, permit-ready plan sets including structural, mechanical, electrical, and plumbing coordination. Engineered and ready for submission.

IV

Permit & Beyond

We submit, we handle plan check corrections, and we support you through construction. We don't disappear after the plans are drawn.

Our Promise

This Is Not a Side Hustle

Design 1 Studio was built to last. We've been here for ten years, we'll be here for ten more, and every project we take on gets the full weight of our experience and commitment. Period.

◆

We Finish What We Start

100% project completion rate. Every project. Every time. We don't abandon timelines and we don't leave clients hanging.

◆

We Know the Code

A decade navigating LA County's building codes, zoning laws, and permitting processes. We know what gets approved and what doesn't.

◆

We're Accountable

Incorporated. Insured. Established. We put our name on everything we produce because we stand behind the quality of our work.

Get Started

Let's Build
Something

Ready to move forward? Whether you have a fully formed vision or just the seed of an idea, we're here to help you develop it into a reality. Your first consultation is free.

Phone
(626) 214-5929
Service Area
All of Los Angeles County
Availability
Mon – Fri, 8am – 6pm
Weekends by appointment