Mixed-Use
A mixed-use building combines several functions into one structure. For instance, parts of a building may be devoted to hotel rooms while other parts are used for residential units and commercial services.
Structural Engineering That Balances Strength, Safety, and Aesthetic Vision
At S3DA Design, we specialize in crafting robust, safe, and visually compelling structures that bring architectural concepts to life. Our experienced structural engineers work in close collaboration with architects and MEP professionals to deliver code-compliant, high-performance designs for buildings of all types.
We go beyond the basics—combining precision, innovation, and technical excellence to ensure each project stands the test of time while enhancing its architectural appeal.
Structural Engineering Design Services
- Structural system design for buildings (steel, concrete, timber, masonry)
- Foundation design (shallow, deep, pile, mat, and retrofit solutions)
- Structural analysis and load calculations (gravity, lateral, seismic, wind)
- Building Information Modeling (BIM)
- Structural detailing and construction documentation (drawings, specifications, schedules)
- Retrofitting, rehabilitation, and renovation design for existing structures
- Demolition and erection planning/engineering
- Seismic analysis and design
- Coordination with architects and MEP engineers
- Temporary structures and shoring design
- Structural peer review and code compliance checks
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Full-Service Ground-Up Buildings
A ground-up construction project is building a structure completely from scratch, where nothing existed before.
We can assist you in every step: from site survey to structural and MEP design. Our engineers are well-versed in complex structures and offer consultancy for optimized plans and calculations according to design codes and regulations, making sure you get a permit.
Seismic Retrofit Engineering
Seismic retrofitting is the process of modifying existing structures to make them more resistant to seismic activity, ground motion, or soil failure due to earthquakes. It involves strengthening the building’s foundation to make it more resistant to earthquake shaking and damage.
Seismic retrofitting includes bracing, bolting, and reinforcing the foundation, walls, roof, and chimney to resist earthquake shaking. Our engineers will help to upgrade your building so that it complies with building codes, thus keeping families, employees, and customers safe when a natural disaster occurs.
Our designs emphasize safety and development according to regulations while cutting down costs through value engineering. As a single source of both structural and MEP design, we also heavily reduce design clashes, saving valuable time and resources.
Foundation Engineering
The foundation transfers the load of the building to the ground and anchors it against wind and earthquake. A strong foundation is crucial for a building to last long. Therefore, it must be protected from cracks, settling, or sloping.
Our structural design engineers offer professional plans to protect your foundation against such damages and will calculate for wear and tear and imperfect soil conditions.
Load-bearing wall Removal
If you are planning to remove a load-bearing wall, our structural engineer can ensure that your building structure can remain structurally sound.
Warehouse Design
Warehouse design is a specialty of S3DA Design, as such projects often require both structural as well as Mechanical, Electrical, and Plumbing (MEP) designs, particularly for HVAC systems.
Our designs emphasize safety and development according to regulations while cutting down costs through value engineering. As a single source of both structural and MEP design, we also heavily reduce design clashes, saving valuable time and resources.
Ready to elevate your structural and MEP designs?
High Wind Engineering
Wind engineering is a subset of structural engineering, meteorology, and applied physics that analyzes the effects of wind in the natural and built environment and studies the possible damage, inconvenience, or benefits that may result from the wind.
Our engineers consider various factors such as the velocity of wind, building geometry, type of building material, characteristics of soil, and the aerodynamics of flow around the buildings to design a better cyclone-resistant building.
Structural Calculations
Wind engineering is a subset of structural engineering, meteorology, and applied physics that analyzes the effects of wind in the natural and built environment and studies the possible damage, inconvenience, or benefits that may result from the wind.
Our engineers consider various factors such as the velocity of wind, building geometry, type of building material, characteristics of soil, and the aerodynamics of flow around the buildings to design a better cyclone-resistant building.
Express car wash and oil change facility
An express carwash and oil change facility provides quick and efficient car washing and oil changing services.
Restaurant Design
- Restaurants differ from other kinds of buildings because of the importance of their kitchen. A kitchen must be safe, competent, easy to maintain, and functional. Designers must prioritize ventilation systems, logistical necessities, and delivery and storage requirements.
- Restaurants need extra expertise from MEP designers, and we are uniquely positioned to develop such plans as we offer both structural and MEP design.
Church
- MEP design is important for planning, decision-making, accurate documentation, performance- and cost estimation, construction, and operating/maintaining the resulting facilities.
- C-Stores
- Full MEP Set Design and Building Energy Efficiency Standards- T24.
Curious about what S3DA can do for your structural designs?
Sample projects
May 15, 2026
May 06, 2026
Structural design for a Garage Remodel, Buxton, OR
May 04, 2026
MEP design for childcare, Granada Hills, CA
Apr 21, 2026
Mixed-Use Development in Los Angeles, CA
What our clients say
"S3DA Design team are a good hard working group of professionals. They provide great communication, drawings and feedback during all aspects of the design and permitting process. I have worked with them on multiple commercial and residential projects and they always deliver in a timely manner and are priced very well. I recommend using them on any project. Their drawings are methodical and easy to understand, which makes the job easier for everyone! "
Belal Siddiqui
Owner of Mobius Designs
"I truly enjoy working with the S3DA Design team. We have completed several projects and they are professional, communicative, and expedient. They deliver good solutions quickly for a competitive price. Their work usually passes the plan check on the first submittal. I highly recommend the S3DA Design team."
Steve Poehlein
Chief Designer at sp design+build
"My husband and I have a small architectural firm in Atlanta that specializes in transforming shipping containers and modular systems into residential and commercial projects and our "go-to" engineering firm for MEP services is S3DA. They are easy to work with, professional and provide quality work and always deliver on time. Looking forward to continuing the collaboration."
Sharon Ferguson
Co-Founder | Architect | Influencer
"“S3DA Design is one of the best structural and MEP design companies we’ve worked with. Their entire team always delivers us projects of exceptional quality while staying on schedule and under budget. They offer full package design services as well and virtually handle any design projects. We have chosen to work with S3DA Design on our projects” Structural Design"
Evan Wyatt Bliss
Owner & Design Director at STUDIO BLISS LLC
"S3DA contacted me through LinkedIn and while I am usually skeptical of cold messages, I was in need of an MEP engineer so I thought I would give them a shot. After more than a year of working on several projects with their team, I have found them to be responsive, reasonable with timelines and budgets, and willing to stand behind their work. While there are many good engineers out there, S3DA’s customer service stands out as a valuable resource."
Chris Cox
Chief Consultant, Development & Planning at BeGreenLegal Cannabis Consulting
"S3DA Design is a very critical engineering partner for us and our clients because of their attention to detail and professional relationship building skills. They have a very sincere concern for the quality of their work and satisfaction of their clients. Our company provides residential design services requiring the services of a professional structural engineering firm. We have worked with other engineering firms in the past, but S3DA Design has out performed all competitors on several fronts including pricing. But more importantly, it is S3DA’s relationship building and communication skills that have impressed me the most. They sincerely care about the quality of their work and the satisfaction of their clients. I highly recommend them and their work."
Joe Serrano
CEO/Exec. Director at TentMakers Inc./ReCycled Housing
"S3DA is a very conscientious engineering firm with the mindset of coming up with the best solutions for its clients that are effective and cost-efficient. I would recommend S3DA to support your structural designs on your project."
Brenda Hurley
Licensed Realtor at Excel Realty
Frequently Asked Questions
It depends on the complexity of the house, but in most cases, you will need roughly 5 to 8 sets. Those who will need design prints include:
- The owner
- The Contractor
- The Sub-contractors
- The Building Department
- The Mortgage Lender
- The Building Inspector
Yes, you can. If you or your builder have a talent for design, a clear idea of what you want, and if you can create plans that meet your local building authorities, you can go ahead with designing your house.
Well, it depends on several factors such as the complexity of the project, the square area of the land, add-on services like extra revisions, project management services or any type of construction help. We recommend you get in touch with our experts for a better understanding.
Different architects offer numerous services when it comes to initial meetings with potential clients. Many architectural design firms agree to a quick, one-off introduction free of charge to discuss the project, your budget and their ability to deliver.
Our architectural design firm offers
- Conceptual Design
- Exterior Design
- Landscape Design
- Design Development
- Detailed Design and Drawings Production
- Technical Specifications
