In 1898 Reverend Napier Clavering completed the new dormitory which came into be called after him as Napier house. The ground floor of this building houses the Dining Hall. Alison house was built in 1910 and named so in remembrance of the daughter of Trinity’s greatest friend Mr. Watson who raised all the funds Rev. Fraser needed to put up buildings at Trinity. Ryde was the third house which came into existence in 1923. 

In 1922 Rev. AG Fraser acquired the Kandy industrial school building, a very grand building which was subsequently turned out to be the Junior Boarding House. Collins, Perry and Hodges are the three dormitories within the Junior Boarding House. 

The majestic old bungalow next to the KMC which was bought by McLeod Campbell in 1925 was originally the Squealery Boarding House which became the Matron’s Dormitory in 1940. 

Boarding life at Trinity is a very unique experience. It provides opportunity to take up leadership and develop organizing skills. Inter House Sport Tournaments and other competitions make the boarding a vibrant place. House Anniversary Celebrations, Grand Finales, tours and excursions, hikes, paper chases, debates, dramas, speeches, quizzes, discussions on current global affairs make the boarding life a rewarding experience. 

Many who climbed the stairways to enter the boarding dormitories at Trinity, have reached great heights into becoming doctors, lawyers, bankers, engineers, judges , educationalists, IT specialists, cabinet ministers, planters, entrepreneurs, business tycoons and so on. These dormitory corridors have also helped to narrow racial and religious differences and have developed harmony and respect for one another valuing the person for who he is.