Mainboard-listed Tiong Seng Holdings says its unit, Tiong Seng Contractors, has secured a S$146 million contract to design and build an environmentally-friendly condominium. The contract for the condo, called Tree House, was awarded by Chestnut Avenue, a joint venture between City Developments and Hong Realty. The 429-unit condominium project is located on Chestnut Avenue, off Upper Bukit Timah...