An Accessory Dwelling Unit, also known as a granny flat, in-law suite, or backyard cottage, is a secondary housing unit located on the same property as a primary residence. ADUs can be attached to the main house, converted from existing structures (e.g., garages or basements), or built as separate standalone units. They typically include a bedroom, bathroom, kitchen, and living space, providing independent living quarters while remaining connected to the main property.

Before embarking on ADU construction, thorough research and planning are essential. Start by familiarizing yourself with local zoning regulations, building codes, and permit requirements. Determine the maximum size, setback requirements, and any design restrictions for ADUs in your area. Additionally, consider factors such as budget, intended use (rental, family use, etc.), and the impact on the existing property and neighborhood.

The design and layout of your ADU should align with your goals and maximize the available space. Consider factors such as functionality, natural light, privacy, and accessibility when designing the floor plan. Work with an architect or designer to create a well-thought-out layout that meets your specific needs and complies with local building codes.

Navigating the permit process is a crucial step in ADU construction. Determine the required permits and approvals from your local building department. This typically includes submitting architectural plans, engineering documents, energy efficiency calculations, and other necessary paperwork. Working with a knowledgeable contractor or architect who has experience with ADU construction can simplify this process and ensure compliance with local regulations.