Great idea. The student would find this really engaging and relatable. What a lovely way of bringing local history into the present. I really like the idea of the students exploring the area first and then also getting to use wooden blocks and Lego before they begin their building. I have only recently come across TinkerCad. https://www.tinkercad.com/dashboard and have found it to be very good for building out designs. Perhaps this could be something worth considering in these projects.
Overall, this is a fantastic idea, with some really great examples of integration and child led learning. well done