With the death of his father in January 1820, Prince George became King George IV and the King was able to move into the Pavilion in January 1821. The exterior decorations of the Pavilion were finally completed the following year in 1822. Unfortunately on becoming King, George IV saw little of his new Palace, the transformation of Windsor Castle and the rebuilding of Buckingham Palace now occupying his attention. King George IV died on June 26, 1830 and was succeeded by his brother The Duce of Clarence who became King William IV. King William made his first state visit to his palace at Brighton on August 30, 1830. During his reign the North Lodge, now known as the North Gate was constructed in 1832. Queen Victoria first came to the Royal Pavilion in October 1837, four months after the death of King William IV. The Queen made another visit in 1838 and every year from 1842 to 1845 when she stayed at the Pavilion for the last time.
References
Tim Lambert, A Brief History of Brighton, Sussex, www.localhistories.org
Clifford Musgrave, The Royal Pavilion (Royal Pavilion Committee, 1954)
Regina Scott, Brighton's Shining Star: The Royal Pavilion, nineteenteen.blogspot.com/2009/09/brightons-shining-star-royal-pavilion.html