An expansion adds buildings to a facility that is already open: new rows on land held back in the first phase, a climate-controlled building on the frontage, or boat and RV canopies at the back. The building is the familiar part.
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What makes it different from a new facility is that tenants keep driving in while it is built, and the original approvals may or may not stretch to cover it.
Step 2 of 10: Special use permit
- 01 Land and zoning
- 02 Special use permit
- 03 Plat
- 04 Site plan
- 05 TDLR review
- 06 Aquifer plan
- 07 Stormwater
- 08 Driveway access
- 09 Building permit
- 10 Occupancy
In San Antonio a specific use authorization is decided by the city council after a zoning commission hearing, and council may attach conditions to it. An expansion starts by reading the conditions on the original approval.
SourceCity of San Antonio, Unified Development Code, Sec. 35-423 Specific Use Authorization (Sec. 35-320 cross-references it), read 2026-09-23.
Does the original approval cover the new buildings?
Sometimes. Where the city approved the whole facility at the start, including pads for later phases, an expansion may be a building permit against a site plan that already exists. Where the original approval was a special or conditional use permit for a stated number of buildings or a stated site plan, adding buildings can mean going back to the body that granted it. Whether new buildings are reviewed under today's code or under the original approval is a question for the city's planning staff, asked with the original approval in hand.
Ask those questions before any money is spent on drawings. The zoning guide shows how each city read treats storage today.
SourcesCity of Seguin, Code of Ordinances, Appendix A Unified Development Code, Sec. 2.5 Specific use permits, read 2026-09-23; City of New Braunfels, Code of Ordinances, Chapter 144 Zoning, Sec. 144-3.6 Special use permits and Sec. 144-1.4 Definitions, read 2026-09-23; City of Georgetown Unified Development Code, Section 3.07 (Special Use Permit), Sections 3.07.010 to 3.07.060, read 2026-09-23; City of Boerne, Municipal Fee Schedule Effective October 1, 2025 (PDF linked from the Fee Ordinance page), read 2026-09-23; City of San Marcos, Resolution 2025-185 Development Fee Schedule 2025 (7 pages), pages 1 and 5, read 2026-09-23; Texas Legislature, Government Code Chapter 469, Sec. 469.102(c) and (d), read 2026-09-23; Bexar County Public Works, Building Permits page; Bexar County Fire Marshal, Permits & Applications page, read 2026-09-23; Kendall County, Forms & Permits page, read 2026-09-23; Burnet County, On-Site Sewage Facilities (OSSF) & Development Permits page; Development Services page, read 2026-09-23; Kerr County's permit pages were read; no building permit is listed. Kerr County, County Engineer page, Environmental Health pages, and department directory links on the home page, read 2026-09-23; Williamson County, Texas, Frequently Asked Questions, Infrastructure - Developers category, read 2026-09-23; Williamson County, Texas, Fire Marshal, Construction Permits page, read 2026-09-23.
Building around tenants who are still using the site
The access gate, the drive aisles and the office stay in use. That shapes the construction plan: where the contractor stages steel, how deliveries reach the work area without crossing tenant traffic, whether part of the site is fenced off, and in what order the new paving ties into the old.
It also shapes the price, because the work has to be planned around the traffic. Have the original site plan, the gate and aisle layout, and the drainage information ready for whoever prices it.
Matching the buildings that are already there
New rows can match the old ones in color, panel profile and door style, so the facility reads as one place from the road. Older buildings may have been built to an earlier building code, with a frame and slab designed to different loads, so matching the look does not mean copying the structure. The new buildings are designed as new structures.
Where the new building ties into an old one, sharing a wall or a roof line, the connection is a design question for the building's engineer, not something to settle on site.
What the contractor needs to price an expansion
The same as a new site, plus what is already there.
The original site plan and, if you have them, the approval documents.
Where the new buildings go and what product they hold.
How the facility stays open during construction: which gate, which aisles.
Where the site drains today, and whether the existing detention was sized for more roof than is built now.
Questions about expanding an existing self storage facility
Do I need a new permit to add buildings to my storage facility?
Inside a city, TDLR registration has to be in place before the city will accept a building permit application for a project of $50,000 or more. Beyond city limits, each county sets its own path: Bexar County's Fire Marshal decides when a building permit is needed, Kendall County's Fire Marshal takes fire code building permit applications, Burnet County requires a building permit, Kerr County lists no county building permit, and Williamson County's FAQ names none, though its Fire Marshal reviews and permits commercial construction. Whether you also need a new or amended land-use approval is a question for the city's planning staff, asked with the original approval documents in hand.
Can a facility stay open during an expansion?
The construction plan can be built around it: staging, deliveries and the tie-in of new paving arranged so the gate and the drive aisles stay usable. Have the gate and aisle layout ready for whoever prices it.
Six questions, no cost to ask
Price expansions of an existing facility
Where the land is tells a contractor which zoning code and which permit office the project answers to. The product and the timing tell them what to price first.
Last reviewed 2026-09-23.