Family First senator Bob Day has launched a last-ditch bid to keep his NSW building company afloat, denying certainty to dozens of desperate families as his national empire continues to crumbles.

Fairfax Media can reveal that Senator Day's Huxley Homes has applied to have its licence renewed - even though the company last week ceased all work on the homes of its 61 clients because it has no cash.

Senator Bob Day's business empire is falling apart.

Huxley is also about to be evicted from its Sydney offices after falling months behind on rent, as staff members continue to quit and the senator refuses to answer questions about the company's solvency.

Senator Day has also disappeared from Parliament, turning up for just three of the 11 sitting days since the election as he tries to keep Huxley from dragging his other companies across the country into oblivion.