Contract Addendum
Definition:
A contract addendum is a written document that modifies, clarifies, or adds specific terms to an existing contract without invalidating the original agreement. It serves as an official amendment agreed upon by all parties involved and becomes a binding part of the contract once properly executed. Addendums are often used to update timelines, prices, responsibilities, or other contractual details after the initial agreement has been signed.

Contract Addendum Information
A contract addendum allows parties to adjust contract terms to reflect new circumstances or agreements that arise after signing. Unlike a separate contract, an addendum is directly attached to the original document and references it explicitly. Common uses include extending deadlines, changing payment terms, adding new clauses, or clarifying ambiguities. Both parties must consent to the changes, and the addendum must meet the same legal requirements as the original contract—such as offer, acceptance, and consideration. When properly executed, an addendum carries the same legal weight as the initial agreement.
Florida Legal Definition
In Florida, a contract addendum is recognized under general contract law principles established in Chapter 672 and related provisions of the Florida Statutes. It must clearly identify the original agreement, specify the changes being made, and be signed by all parties to be enforceable. Florida courts uphold addendums when they demonstrate mutual consent and are not contrary to public policy. In real estate transactions, addendums are frequently used to modify purchase agreements, inspection timelines, or financing terms. The Florida Real Estate Commission (FREC) also provides standardized addendum forms to ensure compliance with state regulations.
How It’s Used in Practice
In practice, contract addendums are widely used in real estate, business, and employment contracts. In Florida, they are often attached to property purchase agreements to address issues like appraisal contingencies, repair requests, or closing date changes. Attorneys and brokers ensure that addendums reference the original contract, outline specific amendments, and are signed by all parties. Addendums help maintain flexibility in contractual relationships while preserving the enforceability of the original terms.
Key Takeaways
- A contract addendum modifies or adds terms to an existing agreement without replacing it.
- Must be in writing, reference the original contract, and be signed by all parties.
- In Florida, governed by general contract law under Chapter 672 of the Florida Statutes.
- Commonly used in real estate, business, and employment agreements.
- Ensures flexibility while maintaining the validity of the original contract.
Disclaimer: The information and opinions provided are for general educational, informational or entertainment purposes only and should not be construed as legal advice or a substitute for consultation with a qualified attorney. Any information that you read does not create an attorney–client relationship with Barnes Walker, Goethe, Perron, Shea & Johnson, PLLC, or any of its attorneys. Because laws, regulations, and court interpretations may change over time, the definitions and explanations provided here may not reflect the most current legal standards. The application of law varies depending on your particular facts and jurisdiction. For advice regarding your specific situation, please contact one of our Florida attorneys for personalized guidance.
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