I. What the 2023 bills changed
In 2023 the Legislature passed a package that includes HB 3240 and SB 785. HB 3240 placed closed-loop geothermal wells (the kind that keep their working fluid sealed inside pipe and never draw from an aquifer) under the Railroad Commission of Texas instead of standing up a new regulator. SB 785 settled an ownership question that had been genuinely unclear in state law: the heat belongs to the surface owner, not to whoever owns the minerals below.
The ownership point reads like a footnote until you remember how Texas land is split. Many lots around Houston sit over a split estate, where one party owns the surface and another owns the minerals underneath. By assigning the heat to the surface owner, the Legislature spared a homeowner or landowner from having to bargain with a separate mineral holder before tapping warmth. If you want the exact wording, the enrolled bill text is public at the Texas Legislature site, and it is worth reading instead of a summary.
II. Why this lands here
Houston's advantage is not subtle. The region has a deep bench of people who can case a well, run a cement job, and file the Railroad Commission's paperwork without looking up the form, and that skill set carries over to geothermal almost directly, because a closed-loop well is drilled with much the same rigs and crews as an oil well. Service companies that have slowed down in a soft drilling market have an obvious reason to pay attention.
Gulf Coast geology helps too, though honestly it depends on cost more than on the rock. At last public report, state and federal geologists describe Texas geothermal potential as large but early stage, with the price of drilling deep enough to reach useful heat, not the size of the resource, as the main obstacle. Old oilfield temperature data across the Gulf Coast gives developers a head start on where the hot zones are.
III. What a reader can actually do
A reader who owns land and is curious should start at the Railroad Commission's well permitting pages, where the geothermal rules now sit beside the oil and gas rules. For now the real activity is pilot projects and industrial users looking for process heat, not systems for a single house, so treat this as something to track rather than to buy this year.
Dockets and rulemaking move at their own pace, and the commission has been writing detailed closed-loop well rules in stages since the law passed. Expect incremental steps, public comment periods, and the occasional delay, which is normal for a new well category rather than a sign that anything has stalled.
IV. Worth watching this month
1. Watch the Railroad Commission's geothermal pages for updated closed-loop well rules, the document that actually governs a permit, which matters more than any announcement.
2. Check the Texas Legislature site for the enrolled text of HB 3240 and SB 785 if you want the precise wording on heat ownership rather than someone's paraphrase.
3. Watch ERCOT's interconnection queue and resource reports for any geothermal project, which would be the first real sign the resource is moving toward the grid, though the queue today is still overwhelmingly solar, wind, and storage.
4. Keep a loose eye on the U.S. Department of Energy's Geothermal Technologies Office for pilot funding that could land near Houston, which is routine program news rather than a guarantee.
5. Look for any Railroad Commission public comment window on geothermal rules, the routine and checkable way a landowner can actually weigh in.
Questions readers ask
Does this mean I can drill a geothermal well in my backyard?
Not really, and not yet. The 2023 law and the commission's rules are aimed mostly at closed-loop wells drilled by companies, and permitting plus cost put a deep well well out of range for a typical homeowner. Shallow ground-source heat pumps are a separate, smaller thing.
Who owns the heat under my property now?
Under SB 785, the surface owner does. That matters on split-estate land, where someone else may hold the minerals below you. The heat was assigned to the surface, not to the minerals.
Why the Railroad Commission and not a new agency?
The commission already permits oil and gas wells and has the staff and rules for holes in the ground. HB 3240 routed closed-loop geothermal there so the state did not have to build a regulator from scratch.
Is this the same as home geothermal heating?
Not quite. Home ground-source systems move heat through shallow loops near the surface, while the closed-loop wells in this law reach deeper, hotter rock for larger-scale heat or power. The physics rhymes, but the depth and cost do not.
Sources of record
- Texas Legislature Online, HB 3240 (88th Legislature), State government. The enrolled bill and its history, where the closed-loop geothermal jurisdiction language lives., capitol.texas.gov/BillLookup/History.aspx?LegSess=88R&Bill=HB3240
- Texas Legislature Online, SB 785 (88th Legislature), State government. The bill assigning geothermal heat ownership to the surface owner; read the enrolled version., capitol.texas.gov/BillLookup/History.aspx?LegSess=88R&Bill=SB785
- Railroad Commission of Texas, State regulator. Well permitting and the geothermal rules that actually govern a permit, beside the oil and gas rules., www.rrc.texas.gov
- ERCOT, The Texas grid operator. Its interconnection queue and resource reports show whether any geothermal is nearing the grid., www.ercot.com
- U.S. Department of Energy, Geothermal Technologies Office, Federal program page with pilot funding news and plain explainers on closed-loop and enhanced geothermal., www.energy.gov/eere/geothermal/geothermal-technologies-office