8880 Rio San Diego Drive 8th Floor, CA 92108

Residential Projects

Structural Engineering x

New Custom Home

Building a new custom home enables you to design everything according to your preferences. However, besides appearance and comfort you also need to pay attention to loads, codes and regulations, and safety measures. The house will need electricity, water and sewage systems, HVAC, and air conditioning among other things.

S3DA has years of experience in these sectors, being proficient in codes and regulations and experts in structural and MEP design. For that reason, we can support you in every step of the design phase to ensure you get a permit, without losing any time or budget to design clashes.

New Custom Home
multifamily building

Multifamily Buildings

Multifamily housing refers to a building that contains more than one dwelling unit, and they are continuously gaining popularity especially because of housing shortage; such buildings enable more homes in dense municipalities.

A multifamily building can be built from the ground up, or a larger building can be remodeled into several homes. We are experienced with both and can assist you throughout the process to ensure all design codes are met, safety regulations are followed, and the designs are optimized to reduce costs.

Load Bearing Wall Removal

Removing a wall may grant more open space, but not every wall can be easily removed: some of them are carrying a load and require special measures and calculations.

We will help you identify those walls and provide plans that preserve the stability of the building.

Load Bearing Walls
Seismic Retrofit Engineering

Seismic Retrofit Engineering

Seismic retrofitting is the modification of existing structures to make them more resistant to earthquakes or similar natural disasters. We perform a site inspection to determine the seismic retrofit needs and offer designs to enhance the structures, helping you to obtain a permit for your project.

Structural Calculations

While architecture defines the appearance of a building, structural engineering ensures the building stands up and can withstand heavy winds, earthquakes, or gravity loads. Structural calculations are the math behind this ability, and determine the properties of columns, joists, beams, slabs, trusses and other members that comprise a building.

Our structural calculation follows local building codes, therefore not only ensures you can get a permit but also consider value engineering to cut down actual construction costs.

Structural Calculations
Pool Engineering

Pool Engineering

Building a swimming pool is subject to safety measures as well as local codes and permit requirements. A properly designed pool supports the soil around it, thereby preventing cracks and leaks.

We offer structural as well as MEP design services for several different swimming pools, ranging from residential swimming pools and community pools to hotel pools, high school pools, college, and university pools.

Accessory Dwelling Unit (ADU)

ADUs are tiny homes, mostly built for the purpose of renting to family members at lower-than-market rates. They offer an effective option to increase the value and space of your home, and in the current housing market crisis, they are gaining popularity. An ADU building can be attached, detached, or repurposing of an existing structure (such as a garage).

As independent living units, the design of an ADU requires both structural as well as MEP design, since the structure includes a kitchen or bathroom and thus needs electricity and water sewage systems. S3DA Design can handle all requirements in house, saving you the need to coordinate between different companies and avoiding design clashes.

Accessory Dwelling Units
Remodel and addition

Remodel and Addition

Over the years, your housing requirements change. Home remodeling allows you to make better use of your space and adapt to those changing needs.

For instance, the kitchen can be remodeled to make cooking or cleaning easier. Bathrooms may be remodeled to incorporate the latest designs. The bedroom can be changed to accommodate new furniture or lighting.  Mezzanines can be added to make better use of the space. Each remodeling project is a custom challenge, and our engineers are experts at remodeling who can guide you to make the most efficient use of your space.

Home Office

Working from home is a new trend. Many have seen the benefits it offers while others are drawn to it by necessity. Either way, having a dedicated place for work greatly improves concentration and work productivity.

However, designing a home office needs lighting design, planning for a soundproof environment, rethink the color scheme of the room as well as paying attention to a storage location for your paperwork and stationery. Our engineers are experts in home office design and can help you through all stages until you receive the final permit.

building safe environments
Foundation Engineering

Foundation Engineering

The foundation transfers the load of the building to the ground and anchors 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.

Decks and Patios

Some of our clients need help, deciding if a deck would be suitable for their outdoor space or a patio. Luckily, we are experts in both and can help you decide based on a number of factors including budget, location, purpose, size, materials and maintenance.

Our engineers will help you with the design, starting with the foundation up to the frame and stairs. We help you choose the material that will last long without damaging the appearance of your deck or patio.

Deck and Patio

Need help with your structural design?



The HVAC system is a key mechanical component that puts you in control over temperature and humidity. HVAC systems are one of the most expensive parts of a building’s operation, therefore an efficient design is mandatory to minimize your energy and gas bills while maintaining a great result.

Our company’s specialists ensure that not only do the HVAC designs provide maximum efficiency, but also comply with building codes to ensure quick and pain-free city approval. The design encompasses multiple levels including floor plans, air and water riser diagrams, equipment specification, and construction requirements.

Some of our HVAC services include mechanical drafting and design, mechanical detailing, 3D REVIT modeling, schematic heating, and cooling system design, heating and cooling equipment selection heat loss and/or gain calculations, plant room layout design, and duct layout drawings.

Electrical design

Electrical Design

Electrical design is the process of planning and creating electrical equipment such as electrical components, lighting equipment, power systems, mechanical powers, panel board schedules, electrical riser diagrams, and telecommunications infrastructure.

An accurate electrical design plan is crucial to accurately measure the energy usage of each component in the building, allowing to optimize for maximum efficiency. Our engineers are experts in electrical design and are well-versed in alternative energy sources such as solar panels, helping you to achieve high efficiency with your plan and reduce energy costs as well as maintenance requirements.

Our electrical design services include electrical schematics, power and lighting plans, interior lighting and exterior lighting, electrical site plans, riser diagrams, electrical panel schedules and distribution panels, wiring diagrams and power distribution systems.

Plumbing Design

A plumbing design addresses two systems; one that supplies water and one that gets rid of waste. An efficient plumbing system provides water to the necessary sections of a building with the right flow and pressure while saving water and energy resources. An accurately sized system can minimize pumping costs, and an efficient water usage system reduces the heating bill. The system can be further improved via water-saving upgrades such as rainwater collection tanks, low-flow plumbing features, and greywater recycling systems.

Our engineers develop professional plumbing designs adhering to local design codes while being optimized for maximum efficiency. We offer plumbing and drainage drafting services design and drafting services for domestic water, plumbing set up of natural and LP gas piping drafting, compressed air and medical gas system plan drawings, demolition and existing plan drawings, isometrics, riser diagrams, schematics, and schedules.

Green Construction

Title 24

Title 24 is a collection of energy standards created by the California Building Standards Commission in 1978, that strives to make buildings more energy-efficient and reduce greenhouse gas emissions. The standards are updated every three years. In 2020, the main purpose is boosting energy efficiency, saving consumers money, and improving air quality.

S3DA Design has experienced engineers who design to meet those goals, using the latest technology and years of experience. Some of our Title 24 services include Title 24 calculation, remodeling lighting, Title -24 envelope, and Title 24 mechanical.

Solar Design

Solar power is increasingly popular, particularly in California which has made solar power mandatory for newly designed homes as part of Title 24, Part 6. Solar power reduces your energy bills, however, installing the system and getting it right is challenging.

Our engineers assist you with picking the right system and designing for efficiency. As MEP and structural design experts, we are particularly well-positioned to take care of all such requirements from start to finish.

solar design
Fire protection

Fire Protection

Fire is the greatest enemy of buildings, thus it is important to prepare and protect against it. There are strict fire protection guidelines, and designs must meet local codes.

Our experts design for fire protection with maximum efficiency and minimum costs in mind, incorporating measures to prevent fire or minimize damage in case of an outbreak. We design for fire alarm systems containing the necessary sensors and devices to detect fire, as well as accommodate fire exists.

Need help with your MEP design?

Evan Wyatt Bliss

Owner & Design Director at STUDIO BLISS LLC

“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”

Residential Projects

Chris Cox

Chief Consultant, Development & Planning at BeGreenLegal Cannabis Consulting

“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.”

Residential Projects

Joe Serrano

CEO/Exec. Director at TentMakers Inc./ReCycled Housing

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

Brenda Hurley

Licensed Realtor at Excel Realty

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

Belal Siddiqui

Owner of Mobius Designs 

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

Steve Poehlein

Chief Designer at sp design+build

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 plan check on the first submittal. I highly recommend the S3DA Design team.

Steve Poehlein

New Testimonial

Principle at Locale Real Estate

S3DA Design did a great job for my team and me on structural engineering analysis. They were very responsive and easy to work with. The work product he provided was excellent and thorough, and the project plans we submitted passed a tough Building Department review. I would highly recommend S3DA Design.

Residential Projects