WELCOME TO Cornerstone Design & Drafting

Professional Architectural Drafting & Home Design Services in Cerritos, CA

Locally owned and operated since 1989.

Permit-Ready Plans for Homes, Remodels, and ADUs Across Los Angeles

Cornerstone Design & Drafting provides expert architectural drafting services for homeowners, builders, and property investors throughout Cerritos, Los Angeles, Pasadena, Burbank, Long Beach, and surrounding cities. From custom home design to ADU plans and permits, we create precise, code-compliant, and permit-ready drawings that move your project smoothly from concept to construction.

ABOUT Cornerstone Design & Drafting

Your Trusted Local Drafting & Home Design Experts

Locally owned and operated since 1989.

With years of experience serving homeowners, contractors, and developers throughout the Los Angeles area, Cornerstone Design & Drafting delivers professional, dependable, and accurate drafting support. Our team specializes in creating residential CAD drawings, floor plan drafting services, and as-built drawings for new construction, remodels, and additions.

We prioritize compliance with California building and zoning codes, working directly with engineers, contractors, and city planning departments to ensure your plans are always submission-ready. When you choose us, you’re working with a team known for expertise, responsiveness, and attention to detail.

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OUR SERVICE

Complete Residential Drafting & Design Services

Our residential drafting services support every stage of your home project, from concept sketches to full construction sets. We specialize in:

Custom home design and new home layouts

Home remodeling design & room additions

Permit-ready drawings for city approvals

Floor plan drafting services

Residential CAD drawings

Architectural drafting services

OUR PROJECTS

What We’ve Built

Residential Design

Why Choose Cornerstone Design & Drafting?

Experience That Builds Confidence

We are an experienced drafting company trusted by homeowners, builders, and developers throughout the Los Angeles region.

As reliable architectural designers based in Cerritos, CA, we understand regional building codes and city permit requirements inside and out. Every plan we produce meets zoning regulations and California building standards, ensuring truly permit-ready drawings.

Specialized Drafting Services

Structural drafting services
Mechanical design drafting
Electrical layout drafting
Interior drafting services
Construction drawing services
Blueprint updates and plan revisions

Our dedicated team specializes in crafting meticulously detailed, code-compliant accessory dwelling unit (ADU) designs and drafts across the diverse landscape of Los Angeles County. With a deep commitment to excellence, we empower builders and engineers by providing precise technical drawings tailored to meet specific project requirements. Together, we can transform your unique vision into reality, ensuring every aspect is thoughtfully designed and executed to perfection!

OUR TEAM

Core Residential Design & Drafting

Technical Capabilities

We utilize industry-leading technology and proven workflows to deliver exceptional results:

ADU Design & Permit Services

Our team specializes in fully code-compliant ADU design and drafting across Los Angeles County, supporting:

We streamline the approval process and ensure your ADU plans meet current regulations for faster permit turnaround.

LET'S START

Start Your Home or ADU Project with Confidence

You don’t have to worry if your project is a full remodel, an addition, or an entirely new architecture. We have the experience and creativity to make it happen. Book a free consultation today and see how we can transform your vision into a beautiful, sustainable space.

Our Simple 3-Step Drafting Process

We Keep Your Project Clear, Compliant & On Schedule

At Cornerstone Design & Drafting, we’ve refined a straightforward, client-focused workflow that ensures clarity, accuracy, and compliance at every step. Whether you’re planning a custom home, remodeling project, or ADU development, our process keeps your project on schedule while eliminating costly planning errors. We manage zoning checks, design coordination, and drafting updates so your final plans are prepared for fast city approval.

CONSULT

We review your goals, property needs, zoning rules, and project scope to create a clear plan path.

Design

Our team drafts accurate CAD plans and layouts customized to meet code and construction needs.

SUBMIT

We finalize and deliver permit-ready drawings for fast city approval and smooth construction start.

"Working with Cornerstone Design & Drafting was an excellent experience from start to finish. We needed permit-ready drawings for our home remodel, and their team guided us through every step with clear communication and expert knowledge. The drawings were incredibly detailed and the city approval went smoothly with no revisions needed. I highly recommend them to anyone needing professional home design services in Los Angeles."

John Doe Homeowner, Cerritos CA

"As a contractor, accuracy and speed are critical, and Cornerstone consistently delivers on both. Their architectural drafting services are precise, organized, and easy to build from. We’ve used them for floor plans, electrical layouts, and structural drafting, and every project has been approved quickly thanks to their code-compliant documentation. Their reliability makes them our go-to drafting company."

Jessica Monroe General Contractor, Long Beach

"Cornerstone handled our ADU design and permit drawings and made the process stress-free. They were knowledgeable about California ADU regulations and created plans that fit our property perfectly while staying compliant with all zoning rules. The permitting process was fast and smooth, and construction started without any drawing issues. Their professionalism and attention to detail are outstanding."

Thomas Alfred Property Investor, Pasadena