The suburb was named after Holy Trinity Avonside , which was built beside the Avon River in 1855 . The 1874 part of the church was designed by the eminent architect Benjamin Mountfort who is buried in the churchyard . The church was damaged in the 2010 Canterbury earthquake and whilst under repair , was damaged beyond repair in the February 2011 Christchurch earthquake and demolished later that year . Avonside is home to Avonside Girls ' High School . It also has the Avon River flowing through it . The boundaries of the original Anglican parish of Avonside were fixed in 1859 and covered much of what is now suburbs such as Aranui , Burwood , Linwood , Marshland , New Brighton , North New Brighton , Parklands and part of Phillipstown . The area once covered the whole of north east Christchurch as far as the River Styx . The area borders the Avon River and is built on the rich soils of the Avon River flood plain . In the early years of Christchurch the area was known to be extremely swampy and difficult to travel across
2010 Canterbury earthquake
2010 Canterbury earthquake
Avonside