Start with the illustrated instructions and lay out the major walls, floors, roof pieces, windows, trim, and detail parts before using glue. Dry-fitting the shell is the calmest way to understand how the building meets the ground and which faces will be most visible. Set the main pieces near their future layout location, even temporarily, and look at the normal viewing angle. That simple check can reveal whether you need a sidewalk, a base, a narrow alley, or a little more room near the track.
Finish parts while they are easy to reach. A recessed window, porch ceiling, garage door, or side wall is usually more comfortable to paint before the structure is closed up. Let the building's job guide the finish. A street-facing entry might be cared for more than a rear delivery door. A roofline can carry a little more weather than the facade below it. Small differences in tone are often enough to make the architecture feel established without hiding the laser-cut detail.
Assemble in stages, checking that corners are square and rooflines sit cleanly before moving on. Once the main form is secure, add the pieces that support the story you have chosen: glazing, signs, trim, lighting, a curb, a driveway, or a small patch of worn ground. The Red Arrow Lines build guide → covers the practical materials and preparation that help a project begin smoothly.