I scratch built this kitchen from a tutorial in 'Making Dolls' House Interiors' by Carol & Nigel Lodder.
In my version - the walls are hollow framed & covered with poplar veneer. The exterior is covered with 1/16" veneer, interior with 1/28" veneer. Interior walls & ceiling are then covered with poster board & painted with a plaster / paint mixture.
Beams: 1/2" pine, cut on a band saw creating rough saw marks, then gouged & hammered,"the antiquing process."
Floor: Torn sheets of paper & poster board, painted blueish gray then dabbed with earth tones, then sealed with water based poly stain.
Window: 3" x 3" lab glass (the kind used for microscope slides.) It wasn't very expense.
Cupboard: Painted wooden box with stained top.
Fireplace Breast: 1/8" poplar. I drew the b&w tiles with a drawing program, printed with an inkjet & had them copied at Staples on a laser printer. I covered them with clear Contact paper.
Tongue & groove wall: There is a cutout section representing (a non-opening door.) I will add a brass / black lock & blk strap hinges.
...still have to build a stove (tutorial is in the book), shelving over cabinet & shelf over fireplace.