What Type of Engineer Do You Need? A Guide for Property Owners in San Antonio
If you're a property owner or developer in San Antonio, chances are you've needed to hire an engineer at some point. The problem is figuring out which one. Engineering is a broad field with a lot of specialties, and most people outside the industry don't know the difference between a civil engineer and a structural engineer, let alone when they need a mechanical or geotechnical one.
We get emails and phone calls all the time from people looking for structural engineering, electrical design, or building inspections. Those are all legitimate needs, but they're not what we do. Rather than just saying "sorry, wrong number," this post is meant to help you figure out exactly which type of engineer you need for your project so you can make the right call the first time.
Civil Engineering
This is what we do at Ramones Engineering. Civil engineers deal with the land and the infrastructure around and beneath a building, not the building itself. If your project involves any of the following, a civil engineer is who you need.
Site development is a big one. When you're taking a piece of raw land and turning it into something buildable, a civil engineer handles the site layout, grading, drainage, utility coordination, and permitting. We make sure the site works before anyone starts designing the building on top of it.
Drainage and stormwater design is another major area. San Antonio has specific requirements through SARA, SAWS, and the City for how stormwater runoff is managed on your property. A civil engineer designs detention ponds, storm drain systems, and erosion control plans to meet those requirements.
Subdivision platting comes up when you're dividing land into lots for sale or development. The plat has to be prepared by a licensed engineer or surveyor, reviewed by the City, and recorded with the county.
Zoning and land use entitlements, like the rezoning process we wrote about recently, also fall under civil engineering. We prepare the maps, coordinate with City staff, and guide clients through the hearing process.
FEMA flood studies, utility design, road design, and construction phase services like bypass pumping are all civil engineering as well. If your project is about the land, the water, or the underground infrastructure, that's us.
Structural Engineering
This is the one people confuse with civil engineering most often. Structural engineers design the bones of a building. They make sure the foundation, framing, beams, columns, and load-bearing walls can safely support the structure and withstand wind, seismic, and other forces.
You need a structural engineer if you're building a new commercial or residential structure and need foundation and framing design. You also need one if you're adding a second story to an existing building, removing a load-bearing wall during a renovation, dealing with foundation problems like cracking or settling, or if the City requires sealed structural calculations for a building permit.
If someone asks us about foundation design or building framing, we refer them to a structural engineer. There's some overlap in education between civil and structural, but they're different licenses and different specialties.
Geotechnical Engineering
Geotechnical engineers study the soil and rock beneath your site. Before you can design a foundation, someone needs to know what the ground is made of and how it will behave under load. In San Antonio this matters a lot because we have expansive clay soils in some areas and limestone in others, and each requires a different approach.
A geotechnical engineer performs soil borings, runs lab tests, and produces a geotechnical report that tells the structural engineer what type of foundation to design. If you're building anything with a slab or foundation, a geotech report is almost always required. Your civil or structural engineer can typically recommend a geotechnical firm, and on most projects the geotech is one of the first consultants brought on board.
Electrical Engineering
Electrical engineers design the power, lighting, and communication systems inside buildings. This includes electrical panel sizing and circuit layout, interior and exterior lighting design, generator and backup power systems, low-voltage systems like data, security, and fire alarm, and coordination with CPS Energy for service connections.
If you're building or renovating a commercial space and need electrical plans for permitting, that's an electrical engineer. Some larger projects also require coordination between the civil engineer (for site lighting and utility routing) and the electrical engineer (for building systems), but the disciplines are distinct.
Mechanical Engineering (MEP)
Mechanical engineers in the building world typically handle HVAC systems, which covers heating, ventilation, and air conditioning. On commercial projects, they're often part of an MEP team (mechanical, electrical, plumbing) that designs all the building systems together.
You need a mechanical engineer if you're designing or replacing a commercial HVAC system, building a restaurant or commercial kitchen with specific ventilation requirements, or working on any commercial project where the City requires mechanical plans as part of the building permit package.
For residential projects, HVAC design is usually handled by the contractor. But for commercial work, especially in San Antonio's climate, a mechanical engineer is a standard part of the design team.
When You Need More Than One
Most projects of any real size involve multiple engineering disciplines. A typical commercial development in San Antonio might need a civil engineer for site work and permitting, a geotechnical engineer for soil analysis, a structural engineer for the building design, and MEP engineers for the interior systems. Each one handles their piece, and ideally they're all communicating so the work fits together.
The civil engineer is often the first one involved on a land development project because site feasibility, drainage, and permitting need to happen before building design gets too far along. From there, we can usually point you toward the right structural, geotech, or MEP engineers based on what your project needs.
How to Figure Out Who to Call
The simplest way to think about it is this. If your question is about the land, the site, drainage, utilities underground, or permitting with the City, you need a civil engineer. If your question is about the building structure itself, you need a structural engineer. If it's about what's happening inside the building (power, HVAC, plumbing), you need an MEP engineer. And if it's about what's happening beneath the ground before you build, you need a geotechnical engineer.
If you're not sure, just call and ask. We'd rather spend two minutes pointing you in the right direction than have you waste weeks tracking down the wrong person. And if your project does involve civil engineering, we're happy to talk through what's needed.
