To add bedrooms and kitchens in the basement in Falls Church, VA, you need to comply with the local building codes and regulations. Here are some general guidelines that might apply:

1. Building Codes: Falls Church, VA, follows the Virginia Uniform Statewide Building Code (USBC). This code outlines requirements for residential construction, including basement finishes and renovations.
2. Egress Requirements: Each bedroom must have a secondary means of egress in case of emergencies. This typically means a window or door that meets specific size requirements for escape and rescue.
3. Ceiling Height: The ceiling height in habitable spaces, including basements, must meet minimum requirements set by the building code. Generally, this is around 7 feet.
4. Ventilation and Lighting: Proper ventilation and lighting are essential in basement spaces, including bedrooms and kitchens.
5. Plumbing and Electrical: Installations must meet local plumbing and electrical codes. Permits are usually required for these types of work.
6. Fire Safety: Smoke alarms and carbon monoxide detectors must be installed according to code requirements.
7. Kitchen Requirements: Installing a kitchen in the basement may require additional permits and inspections, especially for plumbing and electrical connections.

To get specific details and ensure compliance, it’s advisable to contact the Falls Church County’s Building Department or visit their website. They can provide the most current information on permits, inspections, and specific code requirements for adding bedrooms and kitchens in basements.