Satis House

A 16th-century town house rebuilt as an 18th-century Georgian house, the school took it over in 1950 and purchased it outright in 1968. It had originally been built for Richard Watts who had entertained Queen Elizabeth I there in 1573: asked for her verdict on her stay, the Queen had answered, "satis" (from the Latin satis for "enough"), hence the name of the house.^[5] Above the entrance portico is a 1578 bust of Watts who represented Rochester in Parliament between 1563 and 1571. At Satis House are the office of the principal of King's Rochester, administrative offices and the Sixth Form Centre.

Main school

The oldest building in use which was specifically built for the school. It was completed in 1742, the tower and additional classrooms were added in 1880 and the building extended with porches either end in 1913. During WW2 the building was commandeered for ARP purposes. The wooden roof which had served as the school's assembly hall was removed in 1976. In 1985, it became the Design and Technology Centre. At the entrance are the Parker Memorial Gates (after the Reverend William Parker, headmaster 1913-35) which were dedicated in 1955.

Cheetham Memorial Building

This was opened in 1909 by Richard Glazebrook, director of the National Physical Laboratory. It originally consisted of a science laboratory and an art room and now contains two computing suites. The Venerable Samuel Cheetham was Archdeacon of Rochester from 1882 until his death in 1908.

Laboratory and lecture theatre

The building was opened in 1952 and was the school's first new building for nearly 40 years. Further adjacent science laboratories for chemistry and physics were opened in 1959 and the biology wing in 1980.

Mackean House

This was built in 1840 and later named after the last canon of the cathedral to live there, Canon William Herbert Mackean (1877-1960), Canon of Rochester 1925-58. The headmaster's study and the senior school were housed there until both were relocated Satis House in 1986. The property is marked on early maps as the house of the second prebend. During World War 2 the house was used for ARP purposes and is now used by the senior school English, geography, economics and business studies departments.

Davies Court

Opened in 1982 by the Archbishop of York and named after Ernest William Davies (headmaster 1935-57), it houses the school's art, religious studies and language centres (French, Spanish, German and Russian). Memorial gates at the entrance from the Vines were dedicated in 2006.

Old St Margaret's

Originally a Richard Watts charitable school (as per the plaque on the façade explains), this is the oldest building in the towns of the Lower Medway in continuous educational use. As a Church of England primary school, St Margaret’s, it was taken over by King's School in 1960 and purchased outright in 1968. It is used by the senior school mathematics and classics departments. Parts of the building and outbuildings house the offices of the school's Combined Cadet Force which celebrated its centenary in 2011.

School hall

This was opened and dedicated by the Archbishop of Canterbury in 1967. It is regularly used to host school productions, assemblies and other events.

Bob Doubles

Named after a method of change ringing on five bells. This is the school's café and tuck shop and has recently been moved to the Prep School.

The former building is now the Senior School Library.

King's Rochester Sports Centre

A joint venture with Medway Council, the King's Rochester Sports Centre was officially opened in June 2014 and provides among its modern facilities, netball and tennis courts and a gymnasium which are also available to the general public.^[6] The school also has a Boathouse by Allington Lock near Aylesford on the River Medway which opened in 1984. The school has a long rowing tradition with the King's School Rochester Boat Club being founded in 1861.