Firms previously caught rigging bids for public construction supervision services took part in contracts across 16 of 27 apartment-development districts in South Korea’s third-generation new towns, according to data obtained by lawmakers. The companies were included in 20 of 52 contracts, while the Fair Trade Commission previously fined 20 firms a combined 23.7 billion won and issued corrective orders over collusion on 92 public-service bids.

Critics say administrative lawsuits delaying final sanctions have allowed some firms to continue winning new supervision work.