Compliance and penalties

Wis. Stat. § 101.66
in effect
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(1) Except as provided in subs. (1m) and (1r), every builder, designer, and owner shall use building materials, methods, and equipment which are in conformance with the one- and 2-family dwelling code. (1m) (a) No person may use in a one- or 2-family dwelling load-bearing dimension lumber that has not been tested and approved for conformance as required by the department unless the lumber is approved for use under par. (c) and one of the following applies: 1. The lumber has been milled at the request of the person owning the lumber for use in the construction of the dwelling, and the dwelling will be inhabited by the person owning the lumber. 2. The person milling the lumber sells the lumber directly to a person who will inhabit the dwelling or to a person acting on his or her behalf and for whom a building permit has been issued for the dwelling. (b) The lumber shall be milled so that it meets or exceeds the requirements of the one- and 2-family dwelling code. The person milling the lumber shall provide to the person receiving the lumber a written certification that the lumber meets or exceeds these requirements. The department shall design and provide forms for this purpose. (bn) A person may not provide a written certification under par. (b) unless the person has been issued a certificate of accomplishment evidencing certification or recertification under the lumber grading training program under s. 36.25 (48) and the person has received the certificate within the 5 years before providing the written certification. The person shall attach to the written certification a copy of his or her certificate of accomplishment. (c) Upon receipt of a copy of the certification required under par. (b) an inspector who is certified under sub. (2) may either authorize the use of the lumber, reject the use of the lumber, or authorize its use subject to more restrictive construction requirements, including requirements as to size, spacing, length of spans, and design. (1r) A builder, designer, or owner is not required to comply with those requirements of the one- and 2-family dwelling code for which a waiver is issued under s. 101.648. (2) All inspections shall be by persons certified by the department. (3) Whoever violates this subchapter shall forfeit to the state not less than $25 nor more than $500 for each violation. Each day that such violation continues constitutes a separate offense.
Source: WI Statutes (Official Site)URL: https://docs.legis.wisconsin.gov/document/statutes/101.66Fetched: 10/7/2026