Under federal law, a landlord MUST permit a residential tenant with a disability to make reasonable modifications to the premises only when the tenant:

While it is common for tenants to have medical documentation supporting their need for modifications, federal law does not mandate that tenants provide written proof from a physician. The law focuses on the tenant's right to modify the premises rather than requiring such documentation as a condition for making modifications.

Federal law does not require tenants to obtain the landlord's approval or to secure multiple contractor bids before making reasonable modifications. Although communication with the landlord can be beneficial, the law primarily emphasizes the tenant's right to make necessary changes, as long as reasonable conditions, such as restoration, are met.

The duration of the lease is irrelevant to the tenant's right to make modifications under federal law. Tenants with disabilities can request modifications regardless of the lease length, and the law ensures they maintain this right without tying it to the lease duration.