He was 82.
The cremation will be held in Doon at 11.00 AM tomorrow, his family memebrs said.
His son Ram Kumar is a sitting MLA from Solan district's Doon constituency.
Governor Acharya Devvrat and Chief Minister Virbhadra Singh have expressed grief over his demise.
The CM, in his condolence message, said that Chaudhary Lajja Ram was a popular mass leader of the area and his contributions for the development of Doon area were immense.
Industries, Information and Public Relations Minister of the State Mukesh Agnihotri has also expressed grief over the demise of Lajja Ram.