In July 2026, the Ravalli County Planning Department opened public comment on a floodplain application for a property on Klements Lane in Florence. The request itself was almost mundane: the owners wanted to build a new house and shop, and needed to detach the existing septic system from the old residence and connect it to the new one. But buried in that application is the exact problem that trips up more Florence buyers than any price negotiation ever does. The septic system, the floodplain boundary, and the building plans all had to line up before anyone could pour a foundation. Miss one piece and the whole timeline stalls.
That's the part of buying in Florence that a listing price never shows you. The number on the sign tells you what the seller wants. It says nothing about whether the water and waste systems underneath the property are documented, permitted, and legally sound enough to let you actually use the land the way you're picturing.
The Acre Is the Product, Not the House
Look at what's actually for sale in Florence right now and a pattern shows up fast. As of early August 2026, land listings across the area were pricing out at an average of roughly $36,000 per acre, while the average asking price for a Florence property sits close to $890,000 to $900,000. Do that math on a typical 10 to 20 acre parcel and you'll see the acreage itself, not the square footage of the house, is doing most of the work in that number.
That's a different market than a subdivision lot in Missoula, where the house is the product and the dirt underneath it is incidental. In Florence, the dirt is frequently the product, and what makes that dirt usable is a private well and an onsite septic system rather than a municipal hookup. If those two systems aren't in order, the acreage you're paying a premium for can't legally support the home you're planning to put on it. The Florence neighborhood has plenty of buyers who learn this only after they're already under contract.
Three Signatures That Decide Your Closing Date
A price gets you to an accepted offer. These three items decide whether you actually close on schedule.
The Septic Permit
Ravalli County Environmental Health has said plainly, more than once, that unpermitted septic systems turn up every month in the valley, and that buyers, sellers, and their agents can be held liable for penalties if they close on a property with one. The county's own rules define a septic system's legal capacity by bedroom count, and any system that doesn't match the number of bedrooms on file is considered non-conforming, which the county treats as a failed system that can't lawfully be used or altered without a variance.
The fix isn't complicated, but it takes time you should plan for. Ravalli County Environmental Health, at 215 South 4th Street in Hamilton, can pull the existing permit on file or, if none exists, issue a determination based on tax records, subdivision approvals, and aerial photos. Once an application is in hand, the county typically responds within two business days with either a Certificate of Compliance or a list of what needs to change. Two days sounds fast until you're the one waiting on it during an under-contract inspection period.
The New Well Rule
If your Florence purchase involves raw or unimproved acreage where you plan to drill a well later, a rule that took effect on January 1, 2026 now sits directly in your path. Most single-family wells in Montana qualify as exempt from a full water rights permit, but as of this year, anyone using that exemption for a new well must file a Notice of Intent to Appropriate Groundwater with the Montana Department of Natural Resources and Conservation before putting the water to use, not after. That reverses decades of practice where a landowner could drill first and file the paperwork once the well was running.
| Before January 1, 2026 | Now | |
|---|---|---|
| When to file | After drilling, once water was in use | Before drilling, before any use |
| Form | Notice of Completion (Form 602) | Notice of Intent (Form 602I), then Form 602 later |
| Practical effect | Drill on your own schedule | Build a filing step into your pre-drilling timeline |
If you're buying land with the intent to build and drill, this is a step to add to your calendar, not something to discover the week you were hoping to break ground.
The Water Right
The Bitterroot River, which runs directly through Florence, sits within a groundwater and surface water basin the state designates as Basin 76H. In January 2026, the Montana Water Court entered an Interlocutory Decree for that basin, with an objection window that ran through June 29, 2026. If a property you're considering comes with an existing water right, whether it's a domestic well claim or an irrigation right tied to a ditch, its status in that adjudication process matters. A right that's fully decreed is settled. A right that's still claimed but not yet decreed is generally reliable but can still be modified as the process moves forward. An unclaimed pre-1973 use, if one exists on the property, may carry far less legal weight than a seller's description implies.
None of this shows up in a listing description. It shows up when a title company or an attorney pulls the water rights abstract, which is exactly the point at which some Florence deals slow down.
What This Means If You're Under Contract
A few checks, done early, save weeks later.
- Request a copy of the septic permit directly from Ravalli County Environmental Health rather than relying on the seller's description of the system
- If the property is within 300 feet of a mapped floodplain, ask whether a floodplain determination has already been completed for the septic system, since one is required before a new or altered permit can be issued
- If you're planning to drill a new well, confirm the timeline for filing a Notice of Intent with DNRC before you set a target move-in date
- Pull the DNRC water rights abstract for the parcel and check its status against the Basin 76H decree if a water right is part of the sale
- If any bedroom count has changed since the septic permit was issued, budget time for an alteration to that permit before you count on using the extra room
Frequently Asked Questions
Does the Basin 76H decree affect a well I already have permitted? If your well's water right has already been through the adjudication process and appears in the decree, the decree brings legal certainty rather than new obligations. The concern is mainly for rights that are still claimed but not yet decreed, or that were never formally claimed at all.
I'm buying raw land in Florence and don't plan to drill right away. Does the new DNRC rule apply to me now? The Notice of Intent requirement applies at the point you're ready to put a new well to use, not simply because you own the land. It's worth filing well ahead of your building timeline, since the notice must be authorized before water use begins, and you'll have five years from authorization to complete the well and file the follow-up Notice of Completion.
How do I find out if a Florence property's septic system is actually permitted before I write an offer? Ravalli County Environmental Health can search their records by parcel and tell you whether a permit is on file. This is worth doing before you write an offer, not after, since a missing or non-conforming permit changes the real cost of the property.
Land in Florence is priced by the acre, but what you're actually closing on is the paperwork that makes that acre usable. If you're weighing a purchase here, Bethany Taylor works these transactions across Florence and the rest of the Bitterroot Valley and can walk you through exactly what to check before you're locked into a timeline. Get a complimentary valuation to start the conversation, or reach out directly with questions about a specific parcel.
