The road drawn on your survey map may not legally exist
The road drawn on your survey map may not legally exist
2026-09-21 · Wisconsin · Courts
Wisconsin's smaller developments — the four-lot lake subdivisions, the rural splits, the mini-developments that never became formal associations — are very often laid out on a Certified Survey Map rather than a recorded plat. The shared road is drawn on it. Everyone assumes the drawing is binding. The Court of Appeals says it is not.
Smith v. Wiskerchen, Appeal No. 2024AP1617, was decided February 10, 2026 by District III, per curiam. It reversed a Price County judgment and directed entry of summary judgment against the easement-by-estoppel claim.1
¶1: “We conclude that material questions of fact remain on the Smiths' reformation claim. We further conclude that the Certified Survey Maps at issue cannot provide the basis for an easement by estoppel claim under the facts of this case.”
How the problem arises
Sellers subdivided lakefront land into lots by Certified Survey Map. One deed conveyed “a perpetual, non-exclusive easement for ingress, egress and utilities over and across that area designated as Road Easement of [CSM] No. 1482 … for the benefit of and appurtenant to Lots 2, 3, and 4” — but another deed failed to reserve the road easement at all.
The sellers sued to reform the defective deed and, in the alternative, argued an easement by estoppel arose from the CSMs themselves, because that is what buying with reference to a recorded map has always meant in Wisconsin.
The doctrine, and its foundation
¶35 states it: “[o]ne who buys lots with reference to a plat which shows certain streets, ways and places in common, is entitled with all other lot owners in the platted area or subdivision to the use with them of the streets, ways and places in common… Lot owners in the same subdivision whose lots are purchased with reference to the same plat are estopped to deny the use in common with other lot owners in the subdivision.”
Every word of that turns on “plat.” And a CSM, the court holds, is not one.
Why a Certified Survey Map is different
¶36: “The Smiths do not cite any binding authority holding that CSMs may form the basis of an easement by estoppel claim. Indeed, the Wisconsin requirements for plat maps and CSMs are vastly different. These differences are significant because the easement by estoppel doctrine is premised on the idea that a plat that complies with WIS. STAT. ch. 236 is dispositive evidence of ownership and use of an easement.”
A recorded subdivision plat under ch. 236 carries executed owner's and mortgagee's certificates and municipal approvals. That formality is what makes the plat's depiction conclusive. A CSM is a survey instrument, and it carries that weight only if it has been through the same steps.
Wis. Stat. § 236.34(1m)(e) sets them out: a CSM “may be used for dedication of streets and other public areas, and for granting easements to the public or any person … when owners' certificates and mortgagees' certificates which are in substantially the same form as required by [§] 236.21(2)(a) have been executed” and the governing bodies “have approved such dedication or grant.” Only then does a CSM “have the force and effect provided by [§] 236.29.”
¶39: “Under the facts of this case, we see no basis to extend the doctrine of easement by estoppel based on CSMs that undisputedly do not satisfy the recording standard in WIS. STAT. § 236.34(1m)(e). Without compliance with § 236.34(1m)(e), the CSMs at issue do not dispositively evidence ownership and use as would a recorded plat.”
The certificate requirement under § 236.21(2)(a) is exacting: the certificate must be “signed by the owner, the owner's spouse, and all persons holding an interest in the fee of record or by being in possession and, if the land is mortgaged, by the mortgagee of record.” A CSM recorded without a mortgagee's signature does not qualify, and most are.
The court declined to follow the treatise
A footnote to ¶36 records that the leading Wisconsin practitioner text — Wisconsin Law of Easements and Restrictive Covenants § 2.25 (6th ed. 2022) — argues the doctrine should extend to CSMs. The court did not adopt it. Anyone whose understanding of Wisconsin easement law comes from that section is now working from a position a Wisconsin appellate court has considered and rejected.
What this reaches
The affected Wisconsin communities are the ones least likely to have a lawyer on retainer. A group of lake lots sharing a gravel road. A rural cluster sharing a well or a beach path. A stormwater basin serving six houses. These are typically CSM creations, and they often operate as informal associations collecting money for plowing and grading without a recorded declaration behind them.
After Wiskerchen, the drawing on the CSM is not the source of the right. The right lives in the deeds, or in a CSM that went through the certificate-and-approval process, or nowhere. Where it lives nowhere, the remedy is deed reformation — and the court's other holding is that reformation involves fact questions that defeat summary judgment, so it is a trial, not a motion.
Shared private roads and their maintenance obligations are covered on our Wisconsin governing statute page; the cost-sharing side is a separate question from whether the right of passage exists at all.
What to watch next
The case went back to Price County for trial on reformation under Wis. Stat. § 847.07(1)(a). Because the decision is per curiam it cannot be cited as precedent under Rule 809.23(3), which leaves § 236.34(1m)(e) doing the work — and that statute has been on the books unchanged for decades without anyone reading it this way out loud. Whether a published Wisconsin decision follows, or whether the Legislature closes the gap between what a CSM looks like and what it does, is the open question. Nothing in the 2025-26 session touched it.
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