A lease addendum is a supplementary document attached to the main lease that adds or modifies specific terms — pets, parking, HOA rules, lead-based-paint disclosures — without rewriting the whole lease.
§ I — What "lease addendum" means
A lease addendum is a separate written document that becomes part of the lease by reference. Common categories: pet addenda (deposit, breed restrictions, fees), parking addenda (assigned spaces, guest rules), HOA addenda (community rules incorporated by reference), and statutorily-required addenda (federal lead-based-paint disclosure for pre-1978 housing, state-required mold or radon notices). Addenda must be signed by all lease signatories to bind them.
§ II — How lease addendum varies by state
-
Massachusetts
Massachusetts requires lead-based-paint disclosure (federal) plus state-specific mold and pest-control disclosures depending on circumstances. 105 CMR 410.
-
Florida
See the Florida lease agreement page for Florida-specific lease addendum rules.
-
California
California requires Megan's-Law disclosure, mold disclosure if applicable, and the AB 1482 just-cause notice (post-2020 leases) as addenda.
-
New York
New York requires the federal lead-paint disclosure plus the bedbug-history disclosure for NYC properties (NYC Admin Code § 27-2018.1).
-
Texas
See the Texas lease agreement page for Texas-specific lease addendum rules.
-
North Carolina
See the North Carolina lease agreement page for North Carolina-specific lease addendum rules.
-
Georgia
See the Georgia lease agreement page for Georgia-specific lease addendum rules.
-
Pennsylvania
See the Pennsylvania lease agreement page for Pennsylvania-specific lease addendum rules.
-
Illinois
See the Illinois lease agreement page for Illinois-specific lease addendum rules.
-
Ohio
See the Ohio lease agreement page for Ohio-specific lease addendum rules.
-
Michigan
See the Michigan lease agreement page for Michigan-specific lease addendum rules.
-
Washington
See the Washington lease agreement page for Washington-specific lease addendum rules.
-
Arizona
See the Arizona lease agreement page for Arizona-specific lease addendum rules.
-
Virginia
See the Virginia lease agreement page for Virginia-specific lease addendum rules.
-
New Jersey
See the New Jersey lease agreement page for New Jersey-specific lease addendum rules.
-
Colorado
See the Colorado lease agreement page for Colorado-specific lease addendum rules.
-
Tennessee
See the Tennessee lease agreement page for Tennessee-specific lease addendum rules.
-
Minnesota
See the Minnesota lease agreement page for Minnesota-specific lease addendum rules.
-
Maryland
Maryland leases must include a copy of the Maryland Tenants' Bill of Rights as a required section under Md. Code, Real Prop. § 8-208(c)(4) — effectively a built-in addendum. Other addenda (pet, lead-paint, mold pamphlet) attach as needed.