[9] As a result, the town's historic core comprises the market place and the four roads which meet at it: Northgate, Southgate, Eastgate and Westgate; many of the listed buildings are found in this area.
The Carre family, who owned the manor in the 16th and 17th centuries,[11] were responsible for the grammar school, the hospital and the almshouses, though the buildings all date to the Victorian period.
[13] The 19th-century builders Kirk and Parry constructed or added to numerous public buildings and private residences, including the listed Lafford Terrace and their own houses on Southgate and at Westholme respectively, while the new gasworks powered lamps around the town from 1839.
Sleaford's agricultural location and its new transport links encouraged seed trading, malting and other agriculture-related industry in the late 19th century:[13][14] the seed merchant Charles Sharpe's Grade-II-listed house, The Pines, is on Boston Road, while the massive disused Edwardian Bass and Co. maltings off Mareham Lane is listed as Grade II*.
In the late 20th century, Sleaford's urban area expanded to incorporate the surrounding villages of Quarrington and Holdingham.
It became a farm house during the Carre family's ownership,[39] but was converted into multiple residences in the late 1940s and renovated in the 1980s by the builders Jelson and Co.[40]
In 1825, the comedian Joseph Smedley built this playhouse, though performances were limited to a few weeks a year and the building was let for storage for the rest of the time.
Smedley's retirement in 1841 was followed by a period of declining fortunes for the theatre (possibly connected to Westgate's development as a slum district).