Jessica Martinsen · Austin Real Estate
Buying land and acreage around Austin: water, waste, access, and the tax trap
Wells and septic due diligence, the agricultural-exemption rollback, severed mineral rights, legal access, and the utility questions that price rural land.
Land looks simple and underwrites like a small business. Around Austin the questions that actually price a tract are water, waste, access, restrictions, and taxes - and every one of them has a document. Start with water: rural parcels west and south typically draw from private wells into the Trinity or Edwards aquifers, and a well is only as good as its tested yield and quality. Make any offer contingent on a current well test - gallons per minute under sustained draw, plus a lab panel - and if there is no well yet, talk to local drillers about depths and success rates on neighboring tracts before you assume one is drillable at a sane price.
Waste is the other half of rural utilities. Outside sewer service, homes run on-site septic systems permitted by the county, and the permit file tells you what the system is rated for - a two-bedroom-rated system under a house marketed as four bedrooms is a negotiation, not a detail. Raw land needs a soil evaluation to establish what type of system the ground will accept, because thin Hill Country soil over rock often forces engineered aerobic systems at several times the cost of a conventional drain field. Both the existing-system inspection and the soil evaluation are cheap relative to being wrong.
The agricultural valuation is the tax trap with a spring in it. Land grazed or farmed for years is often taxed on its productive value - a fraction of market - and that status does not automatically survive your purchase or your plans. Change the use, and Texas claws back the difference between ag and market taxation for the prior three years, with interest, as a rollback bill that lands on whoever triggered the change. Before closing, learn the valuation status, what activity maintains it (a modest grazing lease often does), whether a wildlife-management conversion fits your intentions, and who contractually eats the rollback if your build triggers one.
Two title-level questions matter more on land than anywhere else. First, minerals: in Texas the mineral estate can be severed from the surface and is dominant when it is - a mineral owner can, in principle, use reasonable surface area to reach what is theirs. Have the title commitment read for reservations, and price accordingly. Second, access: confirm the parcel touches a public road or carries a recorded, insurable easement, because a handshake path across a neighbor's field is not access, and landlocked parcels trade at the discount they deserve. While you are in the documents, map any pipeline or transmission easements - they are permanent no-build zones.
Then the prosaic line items that separate a dreamy listing from a livable one: the cost of extending electric service (rural co-ops quote per-foot line extensions that can reach five figures), propane versus natural gas, internet that is real rather than theoretical, floodplain mapping across creek-crossed tracts under the current rainfall atlas, and county versus city jurisdiction - unincorporated land carries fewer land-use rules but also fewer services, and land inside a city's extraterritorial jurisdiction sits under a hybrid. A boundary survey with improvements located, ordered fresh, closes the file: fences around old Texas acreage are suggestions, not evidence.
Common questions
- What should a well contingency actually require?
- A sustained-yield test in gallons per minute plus a laboratory quality panel, both current. For raw land, replace it with driller consultations on neighboring depths and success rates before assuming a productive well at reasonable cost.
- What is the agricultural rollback?
- When land under agricultural valuation changes use, Texas recaptures the tax difference for the prior three years, with interest. Establish the status, what maintains it, and who bears a rollback in the contract before you close.
- Why do mineral rights matter if nobody is drilling?
- Because a severed mineral estate is dominant over the surface in Texas. The title commitment shows reservations; what you are buying may be surface only, and that belongs in the price.
- How do I know a parcel has legal access?
- It fronts a public road or carries a recorded easement the title company will insure. Anything less is a landlocked parcel with a story, and lenders decline both.
- What makes Hill Country septic expensive?
- Shallow soil over rock fails conventional drain-field requirements, forcing engineered aerobic systems. A soil evaluation before purchase tells you which system - and which budget - the land dictates.
This page is a planning guide, not a market report. Confirm current prices, taxes, insurance and property facts against authoritative sources before acting on them.