Mark Themig bought his Cloverdale home in 2022 with a straightforward plan. The parcel had been carved off a vineyard, and his purchase agreement included a provision common to that kind of split: he would drill his own well and stop drawing from the vineyard's water supply by May 2026. It was the sort of clause a buyer's attorney writes without much drama, a deadline on a calendar, a line item to close out before a certain date.
Then, in December 2024, a Sonoma County judge ordered the county to halt all non-emergency well permitting. Themig's application was already moving. Two of the three drilling companies he'd contacted told him to file immediately, before the county's freeze caught his paperwork in the queue. He was racing a court order, not a contractor's schedule.
That is the part of buying rural acreage in Sonoma County that a listing sheet will never show you. The well is not a fixed feature of the property, like a roofline or a floor plan. It is a permit that exists inside a regulatory process the county has been fighting over in court since 2021, and as of this month, that fight is still not resolved.
The Ruling That Split the Difference
On August 4, 2026, California's First District Court of Appeal issued a decision in the long-running case brought by Russian Riverkeeper and California Coastkeeper Alliance against Sonoma County. The county won half the argument and lost the other half, and the half it lost is the one that matters for anyone under contract on a well-served property right now.
The court found that Sonoma County did not violate the public trust doctrine when it amended its well ordinance in 2023. Associate Justice Tara Desautels, writing for the panel, held that the environmental groups failed to show the county's analysis was arbitrary or unsupported. On that point, the county's 2023 framework, the one that created a Public Trust Review Area and set new conservation requirements, stands.
But the same panel upheld a separate finding: the county skipped the environmental review that state law requires before adopting those amendments. The case now returns to Sonoma County Superior Court, currently overseen by Judge Jane Gaskell following Judge Bradford DeMeo's retirement, for the county to complete a proper environmental study under the California Environmental Quality Act.
Here is the sentence that should reorder how you read a Dry Creek Valley or Alexander Valley listing. In a footnote, Desautels wrote that the panel expressed "no opinion" on whether a moratorium on non-emergency well permits would be appropriate while that review gets done. The court simply declined to rule it out. Given that Sonoma County has already imposed two well permit freezes in the last four years, once in October 2022 and again in December 2024, that silence is not neutral. It is a door left open.
The Timeline Behind the Ruling
The case has moved in fits and starts since a 2021 lawsuit first challenged the county's approach. Following it end to end shows why a single appellate decision can't fully settle the question for a buyer weighing an offer today.
| Date | Event |
|---|---|
| July 2021 | California Coastkeeper Alliance sues Sonoma County over public trust compliance in well permitting |
| October 2022 | Board of Supervisors adopts a six-month moratorium on new well permits |
| April 2023 | County adopts amended Well Ordinance, creating the Public Trust Review Area |
| May 2023 | Russian Riverkeeper and Coastkeeper file a second suit challenging the amended ordinance |
| August 2024 | Superior Court rules against the county on both public trust and CEQA grounds |
| December 2024 | Court order forces the county to halt non-emergency well permitting; 46 applications frozen mid-process |
| March 2025 | Court of Appeal grants the county a temporary stay, permitting resumes |
| August 4, 2026 | Court of Appeal upholds the public trust finding but affirms the CEQA violation; case remanded |
Four years, two moratoriums, and the environmental review the county still owes. That is the backdrop against which any well permit application in unincorporated Sonoma County is currently being filed.
The Number That Actually Matters at the Closing Table
Most buyers assume a well is a well: you drill it, you use it, you move on. The ordinance draws its real lines around volume. A single-family residence with typical accessory uses, a guest house, a pool, a garden, generally falls under two acre-feet of water use per year, and properties at or below that threshold are exempt from meter installation. Cross that line, particularly with vineyard irrigation, orchard use, or a mixed agricultural and residential parcel, and the well application enters discretionary review inside the Public Trust Review Area, with added conservation conditions and no guaranteed approval timeline.
For a straightforward residential well outside the review area, a standard permit can still move in a matter of weeks. For anything inside the mapped review zone, or anything the county classifies as increasing groundwater use past two acre-feet, expect a longer runway. That distinction is exactly what a buyer needs from their agent and their well contractor before writing an offer contingent on a specific closing date, not after.
A Well Permit Is Not a Water Right
California disclosure law requires a seller to reveal known material facts affecting a property's value, but a functioning well is not the same thing as a documented, transferable water right. Well permit and completion records are filed with Permit Sonoma and searchable by parcel number, which means a buyer can confirm a well's paper trail directly rather than relying solely on a seller's account of it.
That gap between "the well works" and "the well is properly permitted and its records are on file" is where transactions stall. A buyer relying on a shared vineyard well, as Themig's purchase agreement anticipated, is inheriting someone else's legal arrangement, not a settled asset. Before removing contingencies on any Dry Creek Valley or Alexander Valley parcel, it is worth asking directly whether the property's water source is a permitted, standalone well or an informal arrangement that a court order or an ordinance change could unwind.
What This Means If You're Under Contract Right Now
If you are evaluating a well-served estate in the Dry Creek or Alexander Valley corridor, the ruling changes the questions worth asking before you remove a contingency:
- Is the well already permitted and completed, or does the purchase depend on drilling a new one after close?
- Does the parcel sit inside the mapped Public Trust Review Area, and if so, does anticipated water use cross the two acre-foot threshold?
- If a new well is required, what does the contract say about timing, and what happens if the county reimposes a moratorium before the permit is issued?
- Are there existing well completion and permit records on file with the county, or only informal documentation from the seller?
None of these questions have simple yes-or-no answers right now, because the county itself does not yet know how long its environmental review will take. Buyers who ask early get real answers from a well contractor and a title company. Buyers who ask after removing contingencies get Themig's position: racing a court order with money already committed.
For a broader look at how water access shapes value across Sonoma County's growing regions, our guide to choosing the right Wine Country valley for an estate walks through how Dry Creek, Alexander Valley, and their neighbors compare on infrastructure, not just acreage and views.
A Few Questions We Hear Often
Does this ruling mean Sonoma County has stopped issuing well permits again? Not as of this writing. The August 4, 2026 decision sends the case back to Superior Court for the county to complete its environmental review. The appellate panel explicitly declined to say whether a new moratorium is warranted in the meantime, which means the county's next move is still unsettled.
If I'm buying a property with an existing, already-permitted well, does any of this affect me? Less directly. The open questions center on new well construction and permit applications moving through the county's process now. An existing, documented well with clean permit history carries much less exposure to this litigation than a purchase that depends on drilling a new well after closing.
Where can I check whether a well permit is on file for a specific property? Permit Sonoma maintains permit history records tied to parcel numbers, and a title company or well contractor can pull that history as part of due diligence before you remove contingencies.
Buying acreage in Sonoma County's wine regions has always meant reading the land itself, the soil, the slope, the water table. It increasingly means reading the county's docket too. If you're weighing an offer on a Healdsburg-area property and want a clear-eyed read on what its water situation actually requires before you commit, Wynne + Morgensen can walk you through it. Request a Private Consultation.