House Plans and Custom Drafting in San Antonio, TX
San Antonio is the affordability outlier among Texas's big four metros. Zillow puts the average home value here at $251,065, down 2.1% year over year, well under what buyers and builders are paying in Austin, Dallas, or Houston. That gap is the whole story for anyone drafting plans in this market: San Antonio isn't winning on hype, it's winning on volume, because the math still works for a lot of households here. Apex Drafting Services provides custom house plans, ADU design, and permit-ready drawings for San Antonio homeowners, builders, and contractors, entirely remote, with the CAD hours priced for a market where the client's budget still has room to build.
A metro building at volume, not just talking about growth
The numbers back up the affordability angle instead of undercutting it. The city of San Antonio added roughly 24,000 residents in 2024, the fourth-highest numeric gain of any city in the country, and the metro grew 1.51% to 2,491,000 people. That's real household formation, not a speculative bubble, and the permit data shows builders responding to it: the San Antonio metro authorized 14,857 new residential units in 2024, good for 20th nationally, at a rate of 13.6 permits per 1,000 existing homes. Put those two figures together and you get a market that's adding people faster than almost anywhere else in raw numbers, while still pricing homes low enough that new construction and additions pencil out for a wide range of buyers.
The competitive field for drafting work here skews toward firms that have been doing this for decades. Names like Plan Factory, Biorev Studios, and Brickmoon Design have built their businesses on 20 to 30-plus years of local tenure. We're not going to pretend otherwise, Apex Drafting is a new company. What we bring instead is a remote workflow built specifically for CAD and drafting, so a homeowner or contractor in San Antonio gets the same turnaround and revision process we run for clients in Houston, Dallas, Florida, and New York, without paying for the overhead that comes baked into a long-standing local firm's rates.
ADU rules in San Antonio: what the Unified Development Code actually allows
Texas has no statewide ADU law. A bill that would have forced cities to loosen their ADU restrictions, SB 673, passed the state Senate in 2025 but died in the House on June 2, 2025, so ADU policy in Texas remains entirely a city-by-city matter. In San Antonio, that means the Unified Development Code is the only rulebook that matters. It permits ADUs by right in multiple residential and rural zoning districts, which is more permissive than a lot of Texas cities. The tradeoffs: you need an owner-occupancy affidavit on file, the unit is capped at the lesser of 50% of the primary home's square footage or 1,000 to 1,200 square feet, and a dedicated parking space is only required once the ADU exceeds 800 square feet. Those thresholds shape the design before a single wall gets drawn, and we work them into the plan set from the first draft rather than flagging them as a problem after the fact.
Where San Antonio clients are spending their drafting budget
Two forces are shaping demand here: a home-price environment that still leaves room in the budget, and a permitting pace that shows builders are actually pulling the trigger. That combination points toward a specific mix of services rather than a generic list of everything we offer.
ADU Plans & Design
San Antonio's by-right ADU zoning and the 800 sq ft parking threshold make this one of the more buildable ADU markets in Texas. At $251,065 average home value, adding a rentable or multigenerational unit is a realistic move for owners who couldn't make the math work in a pricier metro. See ADU Plans & Design.
Custom House Plans
With 14,857 units authorized across the metro in 2024 and a home price still under $260,000, there's a wide band of buyers building new rather than buying existing inventory at a premium. That's a custom-plan market, not just a remodel market. See Custom House Plans.
Permit-Ready Drawings & As-Builts
A metro authorizing units at 13.6 permits per 1,000 existing homes is a metro where plan sets are moving through review constantly. Builders working multiple jobs at once need drawings that clear the desk on the first pass. See Permit-Ready Drawings & As-Builts.
San Antonio drafting FAQ
Is there a statewide ADU law in Texas?
No. Texas has no statewide ADU mandate. SB 673, a 2025 bill that would have preempted local ADU restrictions statewide, passed the Senate but died in the House on June 2, 2025. ADU rules are set city by city, so San Antonio's own Unified Development Code governs, not a state standard.
Can I build an ADU on my property in San Antonio?
In many residential and rural zoning districts, yes, ADUs are permitted by right under the Unified Development Code. You'll need an owner-occupancy affidavit, the unit is capped at the lesser of 50% of the primary home's square footage or 1,000 to 1,200 square feet, and a parking space is only required if the ADU is over 800 square feet.
Does Apex Drafting have an office in San Antonio?
No. We work 100% remotely and serve San Antonio homeowners, builders, and contractors the same way we serve clients across Texas, Florida, New York, and California. Plan review, revisions, and calls all happen online and by phone.
How does San Antonio compare to Houston and Dallas for home building?
San Antonio is the most affordable of the major Texas metros, with a Zillow average home value of $251,065, down 2.1% year over year, while still authorizing 14,857 new residential units in 2024 and adding about 24,000 residents to the city. We also serve Houston and Dallas if you're comparing markets or working across more than one Texas city.
Get your San Antonio project drafted
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