Landlord-tenant law describes the body of law governing the creation, operation and termination of leases and tenancies, and the rights and obligations of landlords and tenants in residential, commercial and mixed-use premises. It covers issues such as possession, rent, service charges, repairing obligations, quiet enjoyment, security of tenure, eviction, deposit protection and remedies for breach. In England and Wales, and Northern Ireland, core concepts are found in statute (for example, housing and landlord and tenant legislation) and developed through case law, including rules on assured shorthold tenancies, business tenancies and forfeiture. In Scotland, “landlord and tenant law” interacts with distinct regimes for private residential tenancies, social housing and commercial leases, with significant statutory reform and different terminology (e.g. ish, tacit relocation). In Ireland, the Residential Tenancies Acts and Landlord and Tenant Acts provide the primary framework, including protections for Part 4 tenancies and commercial tenants. Across all jurisdictions, landlord-tenant law is central to property practice, real estate finance, housing, social welfare and dispute resolution, and is a frequent source of litigation before courts and specialist tribunals.