California Licensed Architects & Structural Engineers
Your Trusted California Design & Permit Experts
From ADU plans and home additions to structural engineering, load-bearing wall removal, and complete permit processing — our team delivers accurate, buildable, permit-ready plans that help you avoid rejections and move forward with confidence
Our Stats
California Trusted Architectural & Structural Engineering
Years of Experience
Projects Delivered
Permit Approval Rate
Professional Team Members
Cecilia Home provides licensed architectural and structural engineering services for ADUs, additions, remodeling, wall removals, and permit-ready plans. We make the process simple, clear, and stress-free.
With 20+ years of experience, 2,000+ completed projects, and a 95% approval rate, our California-registered engineers deliver accurate, code-compliant designs trusted by homeowners statewide.
Trust & Collaboration
Approved Plans Across California Cities.
Our architectural and structural plans are consistently approved across California — from Northern to Southern cities. With deep familiarity of local building codes, we help homeowners avoid rejections, shorten review cycles, and secure permits with confidence.
All Featured Projects Are Real, City-Approved Plans
Our Services
Our Range of Services
Comprehensive design and construction solutions for residential and commercial projects, delivered with expertise and attention to detail.
ADU Design
Custom Accessory Dwelling Unit designs that maximize your property value while maintaining aesthetic harmony.
Wall Removal
Remove load-bearing walls to create more space in your home.
Home Addition
Add extra space to your home with a new room or extension.
Home Remodeling
Transform your home with expert kitchen, bathroom, and living room remodeling.
Building Permit Service
Secure your building permits with our 100% approval rate and complete regulatory compliance guidance.
Foundation Inspection
Expert foundation inspection with detailed structural reports to ensure safety and long-term stability.
Our Features
Why Choose Cecilia Home?
Licensed, experienced, and trusted across California—we deliver precise designs, clear communication, and reliable results for every project.
PROFESSIONAL EXPERTISE
Licensed architects and engineers with deep knowledge of California codes, ensuring accurate, compliant, and build-ready designs.
CLIENT-CENTERED APPROACH
Clear communication and personalized guidance at every step, ensuring your vision stays at the center of the project.
COMPREHENSIVE SOLUTIONS
From design to permit approval, we provide complete, end-to-end services that save you time and streamline your project.
QUALITY ASSURANCE
All plans meet California building standards, with rigorous checks to ensure safety, accuracy, and long-term performance.
FAST & EFFICIENT DELIVERY
Our optimized design workflow allows us to deliver complete, permit-ready plans in as fast as 7 days—without compromising quality.
LOCAL EXPERIENCE
Expert understanding of California’s building styles, climate needs, and local city requirements for successful permits.
Our Process
Our Process
Our process is designed to be transparent and efficient, delivering a complete one-stop service from design to final permit approval.
Guidance for your project
Free Consultation
Expert advice on your project needs, budget considerations, and permit requirements.
On-Site Assessment
Precise measurements and site evaluation for accurate project planning.
Design Development
Creating detailed plans and visualizations to bring your vision alive.
Permit Acquisition
Navigating complex approval processes to ensure code-compliant construction.
Construction Support
Ongoing guidance and contractor coordination throughout the building process.
Client Testimonials
Trusted by California Homeowners
Ranked #1 on Thumbtack based on verified reviews from homeowners who relied on our architectural and structural engineering services.
Cecilia Home designed our complete home renovation, explained everything clearly, and delivered detailed plans. Honest, professional, and fairly priced—our HOA now knows exactly how to proceed.
View Verified ReviewTrudy M.
Home Remodeling
Mason delivered exactly what I needed—professional, responsive, and great value. Clear communication throughout the process. I'll rely on him for all future remodeling projects.
View Verified ReviewJoanne D.
Home Remodeling
Mason responded instantly and offered honest guidance on whether my garage conversion would pass city review. Knowledgeable, direct, and trustworthy—I look forward to working with them again.
View Verified ReviewJasper T.
ADU Design
I appreciated their honesty. They explained that my foundation cracks were common in the Bay Area and didn't push unnecessary work. Professional, transparent advice I could trust.
View Verified ReviewArturo S.
Structural Engineering
As a general contractor, I value teams who are responsive and accurate. Cecilia Home delivered clear communication, timely plans, and over-the-counter approval. I highly recommend them.
View Verified ReviewKevin V.
Building Permit Services
Mason gave detailed structural guidance for removing our load-bearing wall, including safety considerations. Quick responses and practical advice that helped us comply with local regulations.
View Verified ReviewJackson B.
Wall Removal
FAQ
Frequently Asked Questions
Find clear answers about our services, timelines, process, and how we help you move from design to permit approval smoothly.
We provide architectural and structural design for ADUs, home additions, interior remodeling, wall removals, foundations, seismic retrofits, and permit-ready plans. We also handle all building permit submissions and revisions until approval.
We start with a free consultation, then complete your preliminary plans within one week. Final stamped plans typically take 2–3 weeks. Throughout the process, we provide clear communication, 3D visualization when needed, and full support through city review.
Our pricing is based on project scope and complexity. We offer transparent, fixed-price packages for common services such as ADUs and additions, and provide detailed quotes during your free consultation with no hidden fees.
Preliminary plans are completed in 1 week, and final plans take 2–3 weeks. City review timelines vary by city, but ADU permits typically take 2–3 months. We keep you updated throughout each stage.
Yes. We help you optimize your design based on your budget and provide cost-conscious recommendations while maintaining structural safety and code compliance.
Simply contact us to schedule a free consultation. We’ll review your project goals, timeline, and budget, then prepare a customized proposal. Virtual meetings are available.