US Land Life

Utah

Buying Land in Tooele County, Utah

The state hub notes that Utah's Tooele Valley groundwater basin is closed to most new appropriations. In Tooele County, that closure has a direct, practical consequence for land buyers: the county won't issue a building permit without proof of an existing water right, and its Health Department sets a real minimum lot size for new septic subdivisions in the valley. The county is also home to Dugway Proving Ground, an active military testing range covering a large share of its land area, and one of Utah's fastest-growing populations layered on top of all of it.

Building Permits Require a Documented Water Right

Case-by-case / verify locally

To get a building permit from Tooele County, an applicant must present a valid water share or other acceptable evidence of ownership of a water right attached to the specific building lot or project. Because Tooele Valley is closed to most new groundwater appropriations (per the state hub), a vacant lot without an already-attached water right can be effectively unbuildable until you acquire and formally change an existing right onto it -- confirm a specific parcel's water-right status before assuming it's buildable.

Septic Subdivisions: 5-Acre Minimum Lot Size in Tooele Valley

Case-by-case / verify locally

For new unincorporated subdivisions in Tooele Valley proposing conventional septic systems, the Tooele County Health Department requires a minimum lot size of 5 acres per lot. A narrow exception exists for minor subdivisions of four lots or fewer (not part of a multi-phase project), where lots as small as 1 acre may be considered -- but that's an exception, not the default. Don't assume a smaller lot in a new subdivision is approvable without confirming with the Health Department directly.

Dugway Proving Ground: Large Active Military Installation, Not Private Land

Could not confirm

Dugway Proving Ground is an active U.S. Army testing installation covering roughly 800,000 acres in the county's southwest -- not land available for private purchase, and not land you can assume you have access to cross. The former Deseret Chemical Depot, which closed in 2013, was folded back into Tooele Army Depot as its South Area rather than released for private sale; some reuse for industrial or military-support purposes has been discussed, but this remains federal land. If a parcel you're considering sits near either installation, confirm boundary lines, any easement or access restrictions, and whether military operations affect the area (noise, airspace, or closures) directly with the county and the installation.

Rapid Recent Growth Against a Closed-Basin Backdrop

Could not confirm

Tooele County posted growth of more than 3% between July 2023 and July 2024 -- among the fastest rates of any Utah county in that period. That growth is occurring in a county where the primary valley's groundwater is largely closed to new appropriation, which is a real tension worth understanding: rapid population growth here is not evidence that new water is readily available for a given parcel.

The closed basin, made concrete: no water right, no building permit

The state hub explains that Tooele Valley has been closed to most new groundwater appropriations for years, with only narrow exceptions (small amounts of shallow groundwater that would otherwise flow to the Great Salt Lake). Tooele County's own permitting process makes that closure concrete for a land buyer: before the county's Development Department will issue a building permit, the applicant must present a valid water share or other acceptable evidence of ownership of a water right specifically attached to that building lot or project. Because new appropriations are largely unavailable in the closed basin, the practical path for an unattached vacant lot is to acquire an existing water right and file a change application to move it onto the parcel -- itself a process administered by the Utah Division of Water Rights (see the state hub), not the county.

This means a Tooele Valley parcel's real buildability question is less "is this zoned for a house" and more "does this lot already have a water right attached, and if not, can one realistically be acquired and changed onto it." See the dedicated well-water page linked below for the specific, county-level permitting sequence -- well permit, protection-zone setback, and well testing -- that sits between securing a water right and getting a septic or building permit.

Subdividing in Tooele Valley: a real 5-acre septic minimum, with a narrow exception

The Tooele County Health Department (TCHD), which permits and inspects individual onsite wastewater (septic) systems under its own Regulation #12, sets a specific minimum lot size for new unincorporated subdivisions in Tooele Valley that plan to use conventional septic: 5 acres per lot. A limited exception exists for minor subdivisions -- four lots or fewer, not part of a larger multi-phase project -- where lots as small as 1 acre may be considered. That exception is not automatic, and it applies to a specific, narrow subdivision scenario, not to subdividing agricultural land generally.

If you're evaluating raw land in Tooele Valley with an eye toward subdividing it, confirm both the underlying zoning district's lot-size rules through the county's Development Department and the Health Department's septic-specific subdivision minimum before assuming a given acreage can be split into buildable lots.

Dugway Proving Ground and the former Deseret Chemical Depot

A large share of southwestern Tooele County -- roughly 800,000 acres -- is Dugway Proving Ground, an active U.S. Army installation used for chemical, biological, and other defense-related testing since World War II. This is federal military land, not available for private purchase, and a private parcel near its boundary should not be assumed to have unrestricted access rights across it. Separately, the Deseret Chemical Depot (once a distinct installation used to store and destroy chemical munitions) officially closed in July 2013; rather than being released for private sale, its roughly 19,000-plus acres were redesignated as Tooele Army Depot's "South Area," with some discussion of potential future industrial or military-support reuse. Post-closure environmental review found only low levels of volatile organic compounds in groundwater and recommended continued long-term monitoring rather than immediate remediation, but this remains federally controlled land, not a source of private parcels.

For a buyer looking at land in southern Tooele County -- Rush Valley, Stockton, Vernon, or the area around Dugway itself -- confirm with the county and, where relevant, the installation directly whether a specific parcel is affected by any easement, buffer, noise, or access consideration tied to these federal facilities before assuming unrestricted use.

Who to Call Before Buying Land in Tooele County

A directly verified phone number or department name for a standalone Tooele County GIS office was not confirmed during this research pass; parcel-boundary and zoning-layer lookups should be started through the Development Department or Recorder's Office listed above, or the county's online parcel-search tools, rather than a guessed GIS contact.

Planning & Zoning

Tooele County Development Department -- Planning and Zoning

Confirming a parcel's zoning district under the Tooele County Land Use Ordinance, minimum lot sizes, subdivision review, and building-permit requirements (including the water-right documentation requirement).

Phone: (435) 843-3160Official website →

Septic / Onsite Wastewater

Tooele County Health Department -- Environmental Health

Septic (onsite wastewater) permit applications, soil/percolation testing, well permitting and re-certification, and the 5-acre subdivision septic minimum in Tooele Valley.

Phone: (435) 277-2440Official website →

Assessor / Property Tax

Tooele County Assessor

Current assessed value and property tax questions for a specific parcel.

Phone: (435) 843-3103Official website →

Recorder / Clerk / Land Records

Tooele County Recorder

Recorded deed, easement, plat, and water-share history for a specific parcel.

Phone: (435) 843-3180Official website →

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Topics Specific to Tooele County

Well Permitting Sequence in Tooele County →

Sources

  1. Tooele County Land Use Ordinance — Tooele County, Utah Government (accessed 2026-09)
  2. Community Development — Tooele County, Utah Government (accessed 2026-09)
  3. Instructions for Submitting a Building Permit — Tooele County, Utah Government (accessed 2026-09)
  4. Area 15 - Tooele and Rush Valleys — Utah Division of Water Rights (accessed 2026-09)
  5. Health Regulation #12 Wastewater Disposal — Tooele County Health Department (accessed 2026-09)
  6. Environmental Health — Tooele County Health Department (accessed 2026-09)
  7. Dugway Proving Ground — Wikipedia (accessed 2026-09)
  8. Deseret Chemical Depot — Wikipedia (accessed 2026-09)
  9. Tooele Army Depot, South Area — Center for Land Use Interpretation (accessed 2026-09)
  10. CAMDS officially closed — Tooele Transcript Bulletin (accessed 2026-09)
  11. Latest census data shows variations in Utah communities’ population growth — Standard-Examiner (accessed 2026-09)

Last reviewed 2026-09