Chris puts together a supervillain club in an old warehouse. The old warehouse where this was filmed has since been demolished.
Source: IMDb
Han brings Rey and Finn to the castle of Maz Kanata to get them a ship to the Resistance base. The castle is completely destroyed soon after by the First Order. The set was constructed on one of the backlot spaces of Pinewood, with a bunch of the trees surrounding the studio visible.
Catrin serves as the on-set writer when the production moves to the studio.
Source: IMDb