Los Angeles, CA
Residential ADU
California ADU Permit Package
Architectural, Structural, Title 24
Licensed in All 50 States
Permit-Ready Architectural & Engineering SolutionsAcross the United States
Architectural design, structural engineering, MEP plans, permit drawings, engineering calculations, and professional stamping for residential and commercial projects.
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Projects Delivered
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States Supported
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Permit Approval Rate
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Years Combined Experience
What We Deliver
Comprehensive Design & Engineering Services
From concept to permit approval — one team, every discipline, stamped and ready.
Industries Served
Trusted Across Every Sector
From single-family homes to healthcare campuses, our team scales to your project's complexity.
Residential
Commercial Buildings
Industrial Facilities
Multifamily
Restaurants
Retail Stores
Warehouses
Healthcare
Educational
Why Choose Us
Built Around Your Permit Finish Line
Every step of our workflow is engineered for approval — the first time.
Permit-Ready Documentation
Every set delivered submission-ready.
Fast Turnaround
Standard projects in 5–10 business days.
Nationwide Coverage
Serving in more than 25 U.S. states.
Licensed PE Partners
Stamped by state-registered engineers.
Code-Compliant Designs
IBC, IRC, CBC, and local amendments.
Revision Support
Unlimited revisions until approval.
Professional Coordination
Single point of contact across disciplines.
Approval-Focused Workflow
Built around your permit finish line.
Our Process
From Sketch to Stamped Set in Five Steps
01
Submit Your Plans
Share sketches, photos, or existing drawings.
02
Project Review
We scope, quote, and confirm timelines.
03
Design & Engineering
Drawings and calculations by licensed pros.
04
Quality Assurance
Cross-discipline QA and code compliance check.
05
Permit Submission Support
We support you through approval and revisions.
Featured Projects
Work Delivered Nationwide
A sample of recent permit-ready packages across residential, commercial, and industrial.
Miami, FL
Commercial TI
Florida Commercial Renovation
Architectural, MEP, Permit
Houston, TX
Industrial
Texas Metal Building Design
PEMB, Foundation, Stamping
Chicago, IL
Structural
Illinois Structural Calculations
Calcs, PE Stamp
Brooklyn, NY
Residential
New York Residential Addition
Architectural, Structural
Seattle, WA
Residential
Washington Deck Engineering
Structural, Permit
Client Voices
Trusted by Homeowners, Contractors & Developers
"They delivered a permit-ready ADU set in under two weeks. The city approved it on the first submission — no corrections."
SM
Sarah M.
Homeowner · ADU Project — San Diego, CA
"Incredibly responsive team. MEP coordination was flawless and their PE stamp saved us weeks of back-and-forth."
JR
James R.
General Contractor · Retail TI — Orlando, FL
"Handled 12 units with zero clash issues. Their structural calc package was the cleanest I've seen."
LK
Lena K.
Developer · Multifamily — Austin, TX
"They took ownership from day one. Nationwide licensing meant one team for a multi-state rollout."
DP
David P.
Commercial Client · Warehouse — Phoenix, AZ
FAQ
Answers Before You Ask
Most jurisdictions review submissions in 2–6 weeks. We deliver plans in 5–10 business days and support you through any city comments to keep the process moving.
Yes. We partner with licensed Professional Engineers in all 50 states and provide stamped sets for structural, MEP, and civil scopes.
All 50 U.S. states. Our engineers hold active licenses nationwide, so your project ships with the correct state-specific stamps.
Absolutely. Revisions to address plan-check corrections are included until your project is approved.
Yes. Send us sketches, photos, PDFs, or CAD files — we'll build a permit-ready set from what you already have.
A site address, project description, and any existing drawings or reference photos are enough for us to prepare a scoped quote.
Get Started
Request Your Free Project Quote
Share your project details and we'll respond within one business day with a scoped proposal and timeline.
- No-obligation project scoping
- Nationwide PE stamping
- Revisions included until approval
- Response within 1 business day
+1 (213) 579-9614
quotes@davidcarlosjllc.com
Serving in more than 25 U.S. states