The “Contractor” achievement requires players to build a structure with over 100 logs. Similar to the “Tradesman”, players can build separate structures using 100+ logs to unlock the achievement.
Getting this achievement is straightforward and players should get this from building bases, walls, and other structures from logs. Players looking for tips can follow the Tradesman achievement guide.
Since there are other similar achievements with higher log requirements, such as “Architect” and “City Planner”, players can focus on them and should naturally get Contractor and Tradesman.