A Consent to Sublease Form is a legal document in which a landlord grants written permission for an existing tenant to sublease (or sublet) all or part of their rental property to a third party, known as the subtenant. This document is distinct from the sublease agreement itself -- it specifically addresses the landlord's authorization, which is a prerequisite in most rental arrangements before any subletting can legally occur.

Most residential and commercial leases contain a clause restricting or prohibiting subletting without the landlord's prior written consent. Under common law and the Restatement (Second) of Property (Landlord and Tenant), a tenant who sublets without required consent breaches the lease and may face eviction. State landlord-tenant statutes address this issue with varying levels of tenant protection. For example, New York Real Property Law Section 226-b provides that landlords in buildings with four or more units may not unreasonably withhold consent to subletting. California Civil Code Section 1995.260 similarly requires landlords to act reasonably when consent provisions exist. In contrast, many states allow landlords to withhold consent for any reason if the lease contains an absolute prohibition on subletting.

The Consent to Sublease Form creates a documented record that the landlord was informed of the proposed sublease arrangement, reviewed the subtenant's qualifications, and authorized the subletting under specified conditions. Without this written consent, both the original tenant and the subtenant are exposed to legal risks, including lease termination and eviction proceedings.

A Consent to Sublease Form is needed in the following situations: when a residential tenant needs to relocate temporarily for work, travel, or personal reasons but wants to maintain their lease by subletting to another person; when a commercial tenant has excess office or retail space and wishes to sublease a portion to reduce overhead costs; when a tenant is called for military service and invokes their rights under the Servicemembers Civil Relief Act (SCRA), 50 U.S.C. Section 3955, which may affect lease termination but not necessarily subletting rights; when a college student leaves for a semester abroad and wants to sublet their apartment; and when a tenant in a rent-controlled or rent-stabilized unit needs to preserve their tenancy rights while temporarily vacating.

Additional scenarios include corporate tenants who downsize and need to sublease unused space, tenants in co-living arrangements who want to replace a departing roommate, and tenants who inherit a lease obligation and cannot occupy the unit themselves.

Subletting without obtaining written landlord consent is one of the most common grounds for eviction in landlord-tenant court. Even in jurisdictions where landlords cannot unreasonably withhold consent, the tenant bears the burden of formally requesting permission. Proceeding without this form can result in lease termination, forfeiture of the security deposit, and liability for the remaining lease term.

A legally effective Consent to Sublease Form must include the following elements:

Original lease identification -- the date of the original lease, the names of the landlord and tenant, the property address, the unit number, and the lease term. This connects the consent directly to the underlying lease agreement.

Landlord identification and consent -- the landlord's full legal name (or property management company name), address, and an explicit statement granting consent to the proposed sublease. The consent should specify whether it is limited to this specific subtenant and term or is a general authorization.

Original tenant's continuing obligations -- a clear statement that the original tenant remains fully liable under the master lease, including rent payments, property maintenance, and compliance with all lease terms. Under the legal principle of privity of contract, the landlord's primary relationship remains with the original tenant unless a novation is executed.

Subtenant identification and terms -- the proposed subtenant's full legal name, contact information, and any background screening results reviewed by the landlord. The sublease term, monthly rent amount, and any conditions imposed by the landlord on the subtenant should be documented.

Conditions of consent -- any restrictions the landlord places on the sublease, such as maximum occupancy, pet prohibitions, use restrictions for commercial spaces, requirement for subtenant to carry renter's insurance, or prohibition on further sub-subletting.

Security deposit provisions -- whether the landlord requires an additional security deposit from the subtenant, and how the original tenant's security deposit is affected by the sublease arrangement. State security deposit statutes (such as California Civil Code Section 1950.5 or New York General Obligations Law Section 7-108) impose specific limitations.

Insurance and liability -- clarification of insurance responsibilities, including whether the subtenant must obtain renter's insurance and whether the landlord is named as an additional insured.

Termination conditions -- circumstances under which the landlord may revoke consent, such as the subtenant violating lease terms, failure to pay rent, or illegal activity on the premises.

Signatures -- the landlord's signature, the original tenant's signature, and ideally the subtenant's acknowledgment signature, along with the date of execution.