Wellington College first opened on its present site in 1874 and is located beside the Basin Reserve, just minutes from downtown Wellington.  Set in well landscaped grounds, Wellington College projects an image of history, imposing facilities and an environment of order. The College is sited on 12 hectares (30 acres) of land between Wellington's green belt and the city, and is close to Government, business, sporting, tourist and cultural facilities.

The College has nearly seventy teaching classrooms, laboratory and technical facilities.  In addition, extensive fundraising by the wider College community has provided Sports, Arts and Science centres, the International Students’ Centre, the Girvan Library, Languages Centre and Information and Technology facilities.

The extensive Wellington College grounds include two rugby fields, three cricket grounds, three football fields, four tennis courts, and a small hockey field (Astrograss).

The College buildings include:

-  The Harvey Rees-Thomas Science Block (10 Laboratories)

-  The Girvan Library

-  The Robert Bradley Student Centre

-  International Students' Centre

-  Performing Arts Centre - the Brierley Theatre, Firth Hall and Music Suite

-  Art block - two classrooms

-  Mathematics Block

-  Computer block – (5 Suites)

-  Technology block

-  The Tower Block - five floors of faculty classrooms (English, Geography,

   History, Commerce and Tourism)

-  Languages Centre – seven classrooms and a video conferencing room

-  Assembly Hall, Student Cafeteria and Administration Centre

-  Cricket Pavilion

-  Renouf Sports Centre

-  WCOB Gymnasium

-  Gifford Observatory

The Wellington College grounds include:

-  1 Artificial Turf for both Soccer and Rugby

-  2 Rugby fields (winter) and 3 Cricket grounds (summer)

-  3 Football fields (winter)

-  4 Tennis courts and a small Hockey field (Astrograss)