Basement or cellar means the lower storey of a building below or partly below the ground level.
it is legal to use residential property for commercial purpose, provided that, the prior permission of Municipal authorities of that area should be taken and if the professional is a tenant then landlord’s permission is required.
Any activity relating to the purchase and sale of goods is called a commercial activity. The work done by professionals involves element of service and is not a commercial activity. Hence, it is not illegal.
According to the National Building Code regulations or building by-laws, a basement can be used only for the purpose of storage, dark room, bank cellar, or parking space. Kitchens, bathrooms and toilets are also not allowed in a basement, unless the sewer levels permit the same.
If you own a house on an independent plot, you cannot exceed the permissible floor area ratio (FAR), which denotes how much (according to the development plans and zoning laws of individual states) area you are allowed to construct on a given plot size.
Under the building by-laws for storage and parking, basement space cannot be a part of FAR.
Basement space cannot be used for residential purposes.
You have to give a reply notice based on the advice of your advocate accordingly.