When must filed sub-bids be solicited if the estimated cost is more than $25,000?

The requirement to solicit filed sub-bids arises specifically when the estimated cost exceeds a certain threshold. In the context of public construction projects, laws and regulations are in place to ensure transparency and fairness in the bidding process. When the estimated cost of a project surpasses $25,000, it is mandated to solicit filed sub-bids in order to maintain competitive pricing and to ensure that qualified subcontractors have the opportunity to bid on the work.

This requirement serves to protect the interests of public entities and taxpayers by ensuring that projects are completed at a fair market price and that contractors involved meet certain standards. Soliciting bids above this threshold allows for greater accountability and oversight in the bidding process.

In contrast, thresholds lower than $25,000 might not require the same level of formal solicitation, as they may fall under different procurement processes. Thus, the correct answer is firmly connected to the stipulated threshold of $25,000 for soliciting filed sub-bids.