In Vastu Shastra, geometric patterns hold an important place. These patterns are more than mere decorative elements; they embody spiritual, psychological, and energy-altering functions that are central to creating a comfortable living environment for any person. Geometric patterns in Vastu are believed to shape and influence the energy flow within a space, affecting the well-being and prosperity of its inhabitants.

One of the most essential geometric patterns in Vastu is the "Vastu Purusha Mandala." This pattern is a square grid representing the cosmic person or spirit that symbolises the structure and energy layout of a building. Each square in this grid has its own specific function and is associated with certain energies that correspond to the natural elements—earth, water, fire, air, and space. For instance, the northeast corner is often aligned with water energy, which is linked to calmness and clarity, making it ideal for worship or meditation spaces.

Geometric shapes such as triangles, circles, and hexagons also play distinct roles in Vastu. The triangle is considered a fire element and is commonly used in kitchens or areas where energy and activity are required. Circles, representing infinity and unity, are used in central spaces to promote harmony and balance. Hexagonal and octagonal patterns are often incorporated in designs to bring stability and flow, making these shapes ideal for courtyards or communal areas.

Incorporating these patterns thoughtfully can aid in channelling positive energies and blocking negative influences. Traditional homes, temples, and even modern buildings that adhere to Vastu principles use these patterns to ensure that each space resonates with a sense of tranquillity and order.