What It Takes to Develop a Commercial Site in San Antonio: The Engineering Side

You've got a piece of land and a plan to build something on it. Maybe it's a retail pad, a restaurant, a medical office, or a quick-service shop on a busy corridor. You know what you want to build. What you probably don't know is everything that has to happen on the engineering and permitting side before you can break ground.

Commercial site development in San Antonio involves a lot more than drawing up a site plan and pulling a permit. There are multiple agencies, multiple submittals, and multiple timelines that all need to come together. This post walks through what that process actually looks like so you have a realistic picture before you commit your time and money.

Due Diligence and Feasibility

Before any design work starts, you need to understand what you're working with. This is the step that separates experienced developers from first-timers who end up surprised by costs and delays six months in.

The basics include confirming the property's zoning classification to make sure your intended use is allowed, pulling the recorded plat to check for easements, setbacks, and right-of-way dedications, and reviewing FEMA flood maps to determine whether any portion of the site is in a floodplain. You also want to identify which jurisdiction the property falls under. A site inside San Antonio city limits goes through a different process than one in the City's extraterritorial jurisdiction (ETJ) or unincorporated Bexar County, and many sites in the ETJ have to deal with both.

Utility research matters at this stage too. You need to know where the nearest water and sewer connections are, whether the lines have capacity for your project, and what CPS Energy infrastructure is available. SAWS as-built records and CPS service maps will tell you a lot about what's feasible and what might require extensions or upgrades that blow your budget.

A good civil engineer can run through this due diligence quickly and flag deal-breakers before you spend money on design.

Site Plan Design

Once you've confirmed the site is viable, design begins. The civil site plan covers everything outside the building footprint. That includes the layout of the building, parking, driveways, and access points. It includes grading the site so stormwater flows where it needs to go and doesn't create problems for neighboring properties. It includes designing the stormwater management system, which depending on the site might involve detention ponds, bioretention facilities, storm drains, or a combination. And it includes routing water, sewer, and other utilities from the existing infrastructure to the building.

The site plan also has to comply with the City's Unified Development Code, which governs things like parking counts, landscaping requirements, impervious cover limits, setbacks, and driveway spacing. Getting these details right in the design phase prevents costly revisions during review.

Stormwater and Drainage

Stormwater is where a lot of commercial projects get hung up in San Antonio. The City has specific requirements under the UDC for how you manage runoff from your site, and those requirements changed with the 2023 UDC amendments. If your site is increasing impervious cover (which almost every commercial project does), you'll need to demonstrate that your development doesn't create adverse downstream impacts.

Depending on the size and location of your site, you may need to submit a full Stormwater Management Plan (SWMP) rather than just a drainage memo. This involves modeling existing, interim, and proposed conditions and designing facilities to manage the difference. The City reviews these submittals through the Public Works Department, and the review can take several weeks.

If your property is in a FEMA-designated floodplain, the complexity goes up significantly. Development in the floodplain triggers additional requirements including no-rise certifications, potential CLOMR/LOMR applications, and coordination with FEMA. This can add months to your timeline.

Utility Coordination

Getting utilities to your site involves multiple agencies, and each one has its own application process, review timeline, and fee structure.

SAWS handles water and wastewater. You'll submit for water meter and sewer connection permits, and if your site requires line extensions or upsizing, those need to be designed, reviewed, and approved separately. SAWS plan review typically runs a few weeks but can take longer for complex projects.

CPS Energy handles electric and gas. This is consistently the longest lead-time item on commercial projects in the San Antonio area. Electric service design alone takes two to two and a half months after you submit your application and have your site visit. Gas service can take even longer and may require multiple CPS work requests. If your site is on a TxDOT road, gas service coordination can trigger additional permits. The takeaway here is simple: get your CPS application in as early as possible. Don't wait until the rest of your plans are finished.

Other utilities like telecom and cable are usually less involved but still need to be coordinated, especially if they require easements or have infrastructure in your project area.

Tree Preservation

San Antonio takes tree preservation seriously. Before you can get a grading or building permit, you need a Tree Permit from the Development Services Department. This requires a tree survey identifying all protected trees on the site, and if any protected trees need to be removed, you'll need to go through the mitigation process which can involve replanting or paying into the City's tree fund.

The Tree Permit is also a dependency for other permits. In Bexar County, for example, your approved City Tree Permit is a prerequisite for the Pre-Construction Best Management Practices (PC BMP) permit. If you don't submit the Tree Affidavit early, it can hold up your entire county permitting process.

Agency Submittals and Permitting

This is where the process gets layered. A typical commercial project in San Antonio may require submittals to four or five different agencies, and each one reviews independently on its own timeline.

For a site inside city limits, you're generally submitting to the City of San Antonio (Development Services for site plan review, Public Works for stormwater, and the Tree Permit), SAWS for water and sewer, and CPS Energy for electric and gas. If your site is in the ETJ or Bexar County, you may also need Bexar County permits for stormwater quality and pre-construction BMPs, which have their own application and review cycle.

One thing that catches developers off guard with Bexar County is that you can't just submit your permit documents. You first have to submit an application with the owner and developer contact information, which goes through its own mini review cycle before the county will accept your actual permit package. Build that lead time into your schedule.

If your project involves any work in or near a TxDOT right-of-way, add a TxDOT permit to the list. And if you're disturbing more than one acre, you'll need a Notice of Intent (NOI) filed with TCEQ for stormwater discharge under the Construction General Permit.

Realistic Timelines

Every project is different, but here's a general sense of what to expect for a straightforward commercial site in San Antonio.

Due diligence and feasibility can usually be done in a couple of weeks if you have the right people on it. Design typically takes four to eight weeks depending on complexity. Agency review takes another four to eight weeks per round, and most projects go through at least two rounds of review with comments and revisions. CPS Energy runs on its own timeline that often extends beyond everything else.

All in, from the start of design to having all permits in hand, you're looking at roughly four to six months on a clean project. Sites with floodplain issues, utility extensions, tree mitigation, or contested zoning can take longer. The projects that move fastest are the ones where due diligence was thorough, the civil engineer submitted clean plans, and utility applications went in early.

Getting Started

The smartest move you can make as a developer is getting a civil engineer involved early. Not after you've already bought the property and committed to a timeline, but during due diligence when there's still time to identify problems and adjust your plan. A two-week feasibility review on the front end can save you months of surprises on the back end.

If you're looking at a commercial site in the San Antonio area and want to understand what the engineering and permitting process will look like, that's exactly what we do.