A homeowner guide to reading architectural blueprint conventions and plan symbols.

Solid dark double-lines indicate structural 9-inch walls; thinner parallel lines represent 4.5-inch partitions.

A straight line representing the door leaf connected to a 90-degree quarter-circle arc showing opening radius.

Three or four parallel lines within a wall opening representing the outer frame, sill, and glass pane.

A directional center arrow with label UP or DN showing ascending and descending flight directions.

Standardized top-view outline of toilet bowl, cistern, and oval or rectangular wash basin.

Four burner circles for the gas stove and double-basin rectangles with drainboard linework.

Solid furniture outlines indicate proposed layouts; dashed lines show overhead lofts or beams.

Indicates compass orientation for solar analysis, ventilation, and traditional Vastu verification.

Use these standardized architectural symbols directly in our free online 2D floor plan maker.