The answer is a qualified "yes," but not in those terms. There is no law related to contractors per se. Instead, the worker's compensation laws in Wisconsin penalize employers who do not provide worker's compensation to their employees. Moreover, teh law requires the employert to tell anyone that they contract with that the insurance has lapsed with regard to that contract. That generally means notifying other contractors they are working for by, I suppose, without a signficant stretch, could be applied to a customer of a buidling contractor.

I have included the WIsconsin laws below that relate to tthis narrow issue.

102.85(1)(a)
(a) An employer who fails to comply with s. 102.16 (3) or 102.28 (2) for less than 11 days shall forfeit not less than $100 nor more than $1,000.

102.85(1)(b)
(b) An employer who fails to comply with s. 102.16 (3) or 102.28 (2) for more than 10 days shall forfeit not less than $10 nor more than $100 for each day on which the employer fails to comply with s. 102.16 (3) or 102.28 (2).

102.85(2)
(2) An employer who is required to provide worker's compensation insurance coverage under this chapter shall forfeit not less than $100 nor more than $1,000 if the employer does any of the following:

102.85(2)(a)
(a) Gives false information about the coverage to his or her employees, the department or any other person who contracts with the employer and who requests evidence of worker's compensation coverage in relation to that contract.

102.85(2)(b)
(b) Fails to notify a person who contracts with the employer that the coverage has been canceled in relation to that contract.

102.85(2m)
(2m) The court may waive a forfeiture imposed under sub. (1) or (2) if the court finds that the employer is subject to this chapter only because the employer elected to become subject to this chapter under s. 102.05 (2) or 102.28 (2).

102.85(2p)
(2p) The court may waive a forfeiture imposed under sub. (1) or (2) if the court finds that the sole reason for the uninsured employer's failure to comply with s. 102.82 (2) is that the uninsured employer was a victim of fraud, misrepresentation or gross negligence by an insurance agent or insurance broker or by a person whom a reasonable person would believe is an insurance agent or insurance broker.

102.85(3)
(3) An employer who violates an order to cease operations under s. 102.28 (4) is guilty of a Class I felony.

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