Facing nearly a million dollars in penalties for extensive unpermitted building, tea purveyor and longtime Lagunitas resident David Lee Hoffman has taken a new stand to defend his property. 

Attorney Peter Prows filed a motion on his behalf in Marin Superior Court this month that argues for the validity of a determination of architectural significance bestowed by the Marin County Architectural Commission.

The county had discounted the commission’s 2016 determination for the property—which Mr. Hoffman…