This young Raja was installed by General Reynell Taylor the Commissioner of Amritsar on the 7th October, 1873.
Mian Avtar Singh was appointed as his Wazir.
Settlement operations of land were carried out. Col. Blair Reid retired in March, 1877 and was succeeded by Mr. R.T. Burney under whose administration the communication system was further improved.
Chamba-Brahmaur, Chamba-Chuari Khas and Chamba-Khajiar roads were built.
Mr. R.T. Burnney was succeeded by Capt. C.H.T. Marshall who geared up the developmental works in the state.
Sham Singh Hospital was expanded with facilities for treating in-patients with 40 beds.
The hospital was also fully outfitted with all essential medical and surgical appliances.
In 1881 a dispensary was opened at Tissa.
Leper asylum started by the “Mission to Lepers” in 1876 was taken over by the state in 1881.
The palace was renovated and a number of new houses were built.
Sheetla Bridge over the Ravi damaged by the floods in 1894 was replaced by a suspension bridge of iron at the cost of nearly a lakh of rupees.
A network of Post offices in the interior of the state was started.
The judicial department adapted to local conditions was reorganized on the British pattern.
Police force was increased to maintain law and order.
Buildings and roads were maintained by the Public Works Department.
Education was fostered by opening new schools and promising pupils were offered scholarships for study within and outside the state.
A small military force consisting of 300 infantry and 30 cavalry with 4 guns was formed and barracks were erected in the neighbourhood of the town.
The state was also visited by Sir Mackworth Young, Lt. Governor of Punjab in 1901 and by Lady and Viceroy Curzon in 1900.
Because of his prolonged illness Sham Singh abdicated in favour of his brother Mian Bhuri Singh in 1904.