Contractor Certification

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The 2017 Wisconsin Act 237 made numerous changes to project approval thresholds and bidding requirements for state construction projects. In summary, effective April 5, 2018, several approval thresholds, including the threshold for small projects and projects requiring single prime bidding and contracting, have increased to $300,000. In addition, effective July 1, 2018, this law creates an exception to single prime contracting for certain construction projects. Under the new law, if 85% or more of the estimated construction cost of a project could be completed by a single trade MEP (mechanical, electrical, plumbing, or fire protection) contractor, the Department may bid and contract all work for that construction project directly to a single trade MEP contractor. The changes for single trade contracting take effect for projects advertised for bid after July 1, 2018.

In certain instances, these threshold increases may impact contractor certification levels. Contractors who are currently certified for $300,000 or more in any division of work may bid on small projects up to the new threshold of $300,000. Contractors who are currently certified under $300,000 may only bid on a project up to their current certification level. Beginning July 1, 2018, single trade MEP contractors may bid all work on single trade projects up to their current division of work certification level for that trade. These changes will be automatically updated on WisBuild certification records and should not require any action by the contractor. If you have any questions, please email us at:


Effective January 1, 2014, pursuant to Wis. Stats. 16.855(9m), contractors are required to be certified by the Department of Administration prior to submitting bids on a state construction project. Please do not bid on projects outside of your certified division(s) of work and/or over your certified budget thresholds. All bids received from contractors who are not certified will be rejected. If your company is not certified, please review the following documents to apply for certification. Please access the links on the DFD Single Prime Bidding and Contracting web page for more information about how projects will be let under the new system.

Please be advised that contractor certifications are only valid for a two year period.  Please update and resubmit your application at least 2 months prior to your certification expiration date to allow sufficient time for processing a certification decision.  All bids received from contractors who have an expired certification will be rejected. If you have any questions, please email us at:

Contractor Certification