By definition, a certified survey map (CSM) is any division of land other than a subdivision (i.e., no more than 4 residential lots or more than 8 industrial/mixed use lots)

A Certified Survey Map (CSM), consisting of 4 or less parcels of land designated as lots or outlots, may be recorded in the register of deeds office of the county in which the land is located. Such a CSM may be used to:

• Divide land for sale or exchange.

• Create lots for building or other development.

• Clarify metes and bounds descriptions.

• Reconfigure parcels within a recorded subdivision plat, assessor’s plat, or CSM.

• Add land to an existing subdivision, assessor’s plat, or CSM parcel.

• Consolidate parcels in adjoining subdivisions, assessor’s plats, or CSM’s.

• Define and convey interest in lands dedicated to the public.

No map or survey creating divisions of land or intending to clarify metes and bounds descriptions may be recorded except as provided by Chapter 236, Wis. Stats. Local land division ordinance may mandate the use of a CSM for any or all of the above purposes, unless such use results in a subdivision as defined in s. 236.02 (12), and except as prohibited by s. 236.45 (2), Wis. Stats. Local land division ordinance may allow for the use of a CSM to create more than 4 lots or outlots in certain instances (see s. 236.34 (1) (ar), later in this section).

A CSM may not alter areas previously dedicated to the public, unless such areas are properly vacated or discontinued pursuant to Ch. 236, subchapter VIII or s. 66.1003, Wis. Stats.

A CSM may not alter restrictions, easements, covenants, or other encumbrances placed on the land by any manner, unless said restrictions, easements, covenants, or other encumbrances are released by the party having the right of enforcement, pursuant to s. 236.293 Wis. Stats.