Handling a stormwater fee appeal: a step-by-step process for program managers
Every fee roll gets appealed eventually. Somebody's driveway got measured wrong, or a shed came down three years ago and nobody told the county, or a homeowner just thinks their bill is too high and wants a second look. The appeal itself isn't the hard part. The hard part is proving your number with something better than "that's what the software said."
What a property owner is actually disputing
Most appeals break down into three categories. The owner says the impervious square footage on file doesn't match what's on the ground. The owner removed a structure (a pool deck, a detached garage, pavement) and the fee never adjusted. Or the owner disagrees with how a feature was classified, arguing that a gravel pad or a permeable paver patio shouldn't count the same as a poured driveway.
In all three cases, the owner is asking you to go look. And if your underlying parcel data is five or six years old, going to look often means you're right there with them, staring at a current aerial photo of their lot with no recent source to compare it against.
The verification steps, in order
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Pull the parcel's current record. Confirm the impervious square footage on the bill, the date that figure was last updated, and what source generated it (digitized by a staff member off an old aerial, imported from a county GIS layer, or something else).
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Get a current image of the parcel. This is where most authorities lose time. If your last full remeasurement predates the dispute by several years, you either order a one-off flyover for a single parcel (slow, and it sets a precedent every other appellant will ask for) or you send a field tech with a tape measure, which doesn't scale and still gets argued with.
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Compare the roofline, the driveway, and any pads or patios against the billed figure. A rooftop addition, a new slab, a repaved driveway, all show up clearly in a decent-resolution image. So does a structure that's been removed.
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Document the delta. If the appeal has merit, note the old figure, the new figure, and the date of the source imagery you used to make the call. That date matters: when the owner's neighbor appeals next year, you want a record showing your decision was based on something current, not a guess.
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Apply the correction and set the effective billing date per your authority's policy (prospective, retroactive to the appeal filing date, or whatever your rate ordinance specifies).
Why the imagery date keeps coming up
An appeal that gets resolved off three-year-old imagery invites a second appeal the moment the owner notices the date on the record. Boards of adjustment and hearing officers ask about it too: "What was the source, and when was it flown?" If your answer is "we're not sure, it's been a while," that's a weak position to defend a correction from, and an even weaker one to defend a denial from.
Keeping the whole parcel layer current enough that any given appeal becomes a quick lookup instead of a special project closes this gap. Ordering a flyover for every dispute that comes in doesn't scale the same way, and it trains property owners to expect one. When the impervious area figure for a parcel was last touched on a known, recent cycle, verifying one owner's dispute takes minutes instead of a procurement request.
That's the gap a biennial, parcel-level impervious area layer is built to close. Stormwater Fee keeps the sealed square footage for every rooftop, driveway, and lot on your roll refreshed from recent high-resolution imagery, so you're not digitizing a single parcel by hand or paying for a special flight every time an appeal lands on your desk.
A note on classification disputes
Not every appeal is a measurement problem. Some owners argue that a feature, gravel, mulch beds, permeable pavers, shouldn't be billed as impervious at all. That's a policy call your rate ordinance has to settle, and no imagery source makes that decision for you. What current imagery does is confirm the feature exists, its footprint, and its condition, so the policy question gets decided on accurate facts instead of a guess about what's actually out there.
Keep your fee roll on a known refresh cycle and most appeals turn into a two-minute comparison instead of a special project. Take a look at how the parcel layer works if your roll hasn't been touched in a while.