Modular Stackable Dollhouse

Rooms are the simplest module — glue and nail or screw the plywood walls to the 1x frame pieces. Paint the 1x pieces before assembly wherever you can; it's much easier to get clean coverage on flat stock than inside an assembled room.

Drill the dowel holes for the railing spindles 1/4" deep and glue them in place. Glue and nail the railing frame together, then attach it to the deck's plywood floor with 1-1/4" brad nails.

Nail and glue the roof frame pieces together, mitering the gable corners at 45°. Before the glue sets, set the roof assembly next to an actual room module to confirm it's square against the room's real footprint — a roof that's square only in isolation can still rock or gap once stacked.

Stack your room, deck, and roof modules in any combination — the whole system is designed to mix and match. Add furnishings and details as separate small builds once the core modules are done.