Your Local Design & Engineering Experts
Building DreamsFrom Vision to Reality
Your trusted partner in California for architectural design and structural engineering. We bring local expertise and personalized solutions to every project, big or small.
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Professional Excellence inArchitectural Design & Engineering
With over 15 years of experience in California's architectural landscape, we combine technical expertise with innovative design solutions. Our comprehensive approach ensures your project's success from concept to completion.
Licensed Professional Engineers
Our team of California licensed Professional Engineers (PE) brings over 15 years of expertise in structural and architectural design. Every project is overseen by a licensed PE to ensure safety and compliance.
Rapid Response
24-48 hour response time guaranteed. We understand urgency, especially in fire restoration projects. Our streamlined process ensures quick turnaround without compromising quality.
End-to-End Service
From concept to completion, we handle everything: architectural design, structural engineering, permit applications, and coordination with contractors. One team, one point of contact, zero hassle.
Permit Expertise
95% first-time permit approval rate. Our deep understanding of California building codes and relationships with local authorities ensures smooth permit processes for both residential and commercial projects.
Comprehensive Design Solutions
Full-service design capabilities including architectural, structural, and landscape design. We specialize in modern California aesthetics while prioritizing functionality and sustainability.
Local Experience
Based in California, we've successfully completed 2000+ projects across the state. Our local expertise ensures designs that not only meet codes but also suit California's unique environmental and seismic requirements.
Our Featured Projects
Explore our diverse portfolio of successful projects across California, showcasing our expertise in ADUs, structural engineering, and more.
Modern ADU in Bay Area
A 650 sqft ADU design featuring modern aesthetics and efficient space utilization. Including full kitchen, bathroom, and separate entrance with complete permit approval process.
Residential Foundation Repair
Comprehensive foundation inspection and repair design for a residential property, including detailed structural analysis and reinforcement solutions.
Open Concept Home Renovation
Strategic removal of load-bearing walls to create an open floor plan, including structural calculations and temporary support systems design.
Two-Story Home Addition
Design of a 1,200 sqft two-story addition including master suite, family room, and expanded kitchen. Complete with structural engineering and permit documentation.
Hillside Retaining Wall System
Engineering design for a complex retaining wall system on a steep hillside property, incorporating proper drainage and aesthetic considerations.
Custom Home Construction
Complete architectural and structural design for a new 3,500 sqft modern residence, featuring sustainable design elements and smart home integration.
Mason Zheng
Your Professional Housing Expert
Cecilia Home's chief engineer and Architecture designer, Mason Zheng, started working as a civil engineer in 2000. In 2006, he got a Professional Engineer license in California with the vision to modify the home should be easy and affordable.
Over the last 20 years, He has done civil projects, including houses, communication lines, roads, bridges, etc., especially in property addition design. With all the experiences, He started Cecilia Home in 2016 and has made outstanding achievements in the housing field of the Bay Area.
Experience the Cecilia Home Difference
We combine technical expertise with personalized service to deliver exceptional results for every project.
Professional Team
Our licensed engineers and designers bring decades of combined experience to every project.
Proven Track Record
2000+ successful projects completed across California, with a 95% first-time permit approval rate.
Comprehensive Service
From design to permits, we handle everything in-house, ensuring a seamless experience.
Local Expertise
Deep understanding of California building codes and regulations, ensuring smooth project execution.
What Our Clients Say
Read about real experiences from our satisfied clients across California.
Mason helped us design and get permits for our ADU in just 3 weeks. His expertise with the local building department really showed - we got approved on our first submission. The whole process was smooth and professional.
Michael Chen
San Francisco
After the 2023 storms damaged our foundation, we were really worried about the structural integrity of our home. Cecilia Home did a thorough assessment and provided clear solutions. Their engineering team was knowledgeable and efficient.
Sarah Rodriguez
San Jose
We needed to remove a load-bearing wall to create an open concept living space. The team provided detailed structural calculations and even helped coordinate with our contractor. The result is exactly what we envisioned.
David Thompson
Sacramento
Working with Mason on our hillside home renovation was a great experience. His attention to detail with the retaining wall design and foundation reinforcement gave us peace of mind. The project came in on budget and passed inspection easily.
Jennifer Wu
Oakland
Our commercial building needed seismic retrofitting, and Cecilia Home made the process straightforward. They handled all the engineering calculations and permit documentation. Their expertise in California building codes was invaluable.
Robert Martinez
Los Angeles
We had a complex ADU project with lots of site constraints. Mason came up with creative solutions that maximized our space while meeting all code requirements. His responsiveness and clear communication made the whole process much less stressful.
Emily Parker
San Diego
Frequently Asked Questions
Find answers to common questions about our services, processes, and expertise.
Still have questions? Contact us for more information.
Ready to Transform Your Space?
From ADUs to structural engineering, we're here to bring your vision to life. Get started with a free consultation today.
Quick Response Time
Get a response within 24-48 hours. We understand that your time is valuable.
95% First-Time Approval
Our expertise ensures smooth permit processes and successful project outcomes.