Matthew Brettingham (1699 – 19 August 1769), sometimes called Matthew Brettingham the Elder, was an 18th-century Englishman who rose from humble origins to supervise the construction of Holkham Hall, and become one of the country's best-known architects of his generation. Much of his principal work has since been demolished, particularly his work in London, where he revolutionised the design of the grand townhouse. As a result, he is often overlooked today, remembered principally for his Palladian remodelling of numerous country houses, many of them situated in the East Anglia area of Britain. As Brettingham neared the pinnacle of his career, Palladianism began to fall out of fashion and neoclassicism was introduced, championed by the young Robert Adam.
Brettingham was born in 1699, the second son of Launcelot Brettingham (1664–1727), a bricklayer or stonemason from Norwich, the county town of Norfolk, England. He married Martha Bunn (c. 1697–1783) at St. Augustine's Church, Norwich, on 17 May 1721 and they had nine children together.
His early life is little documented, and one of the earliest recorded references to him is in 1719, when he and his elder brother Robert were admitted to the city of Norwich as bricklayers. A critic of Brettingham's at this time claimed that his work was so poor that it was not worth the nine shillings a week (£65 in 2017) he was paid as a craftsman bricklayer. Whatever the quality of his bricklaying, he soon advanced himself and became a building contractor.
During the early eighteenth century, a building contractor had far more responsibilities than the title suggests today. A contractor often designed, built, and oversaw all details of construction to completion. Architects, often called surveyors, were employed only for the grandest and largest of buildings. By 1730, Brettingham is referred to as a surveyor, working on more important structures than cottages and agricultural buildings. In 1731, it is recorded that he was paid £112 (£16,600 in 2017) for his work on Norwich Gaol. From then, he appears to have worked regularly as the surveyor to the Justices (the contemporary local authority) on public buildings and bridges throughout the 1740s. Projects of his dating from this time include the remodelling of the Shirehouse in Norwich, the construction of Lenwade Bridge over the river Wensum, repairs to Norwich Castle and Norwich Cathedral, as well as the rebuilding of much of St. Margaret's Church, King's Lynn, which had been severely damaged by the collapse of its spire in 1742. His work on the Shirehouse, which was in the gothic style and showed a versatility of design rare for Brettingham, was to result in a protracted court case that was to rumble on through a large part of his life, with allegations of financial discrepancies. In 1755, the case was eventually closed, and Brettingham was left several hundred pounds out of pocket—several tens of thousands, in present-day terms—and with a stain—if only a local one—on his character. Transcripts of the case suggest that it was Brettingham's brother Robert, to whom he had subcontracted and who was responsible for the flint stonework of the Shirehouse, who may have been the cause of the allegations. Brettingham's brief flirtation with the Gothic style, in the words of Robin Lucas, indicates "the approach of an engineer rather than an antiquary" and is "now seen as outlandish". The Shirehouse was demolished in 1822.