Benjamin Henry Latrobe’s drawings for porticoes to the White House, ca. 1817. Library of Congress In 1792, James Hoban had proposed a south porch with doors opening to it from the three south parlors. It was never built. In 1817, Benjamin Latrobe drew proposals for north and south porticoes. These were not constructed until 1824 (the south portico) and 1829 (the north portico) and then under the supervision of James Hoban. Both porticoes (the south is really a porch) are made of Seneca sandstone from Maryland. Only after Andrew Jackson’s election in 1828 did Congress appropriate the funds to build the north portico, which covered the driveway to serve as porte cochere. With the finishing of the porticoes the image of the White House as we know it today was complete.