In Idaho real estate, the RE-11 Addendum is a simple but powerful form: it allows the buyer and seller to add, correct, or revise terms of a contract in writing.
Most often, the RE-11 is used to modify the RE-21 Purchase and Sale Agreement after both parties are already under contract. The form itself explains that an addendum is used to add material information to an agreement and/or to change, correct, or revise it. :contentReference[oaicite:1]{index=1}
Simple takeaway: RE-13 is commonly used to negotiate before mutual acceptance. RE-11 is commonly used to change terms after you’re already under contract.
The RE-11 is the standard Idaho REALTORS® addendum form used to write changes or additions to an existing agreement. The form itself explains that an addendum adds material information and/or changes, corrects, or revises the agreement (including modification, addition, or deletion of a term). :contentReference[oaicite:7]{index=7}
Think of it like a “contract update” page that both buyer and seller sign.
The RE-21 is the main purchase contract. The RE-11 is a tool used to change it in writing.
The RE-11 includes an important priority rule: if the RE-11 modifies or conflicts with the RE-21 (or other referenced documents), then the RE-11 controls for that issue, and everything else stays the same. :contentReference[oaicite:8]{index=8}
This is why buyers should read every RE-11 carefully—one sentence can change a key deadline or responsibility.
In real transactions, the RE-11 is commonly used when something changes after you are already under contract, such as:
Important: the RE-11 is not “casual.” It is a contract change, and once signed, it is enforceable.
No. The RE-13 is commonly used to negotiate terms during the offer stage. The RE-11 is commonly used to change or add terms after you are already under contract.
Yes. If both parties agree in writing, an RE-11 can modify price, credits, or other financial terms.
The RE-11 controls to the extent it modifies or conflicts with the RE-21, and the rest of the RE-21 stays in effect. :contentReference[oaicite:10]{index=10}
Yes. For it to become part of the contract, it must be executed by both parties. The form states it becomes an integral part of the agreement. :contentReference[oaicite:11]{index=11}
Yes. This is one of the most common uses—especially for inspections, appraisal, financing, or closing timing.
Assuming it’s “minor paperwork.” Small wording changes can impact deadlines, money, and risk. Always read the changes line-by-line.
As many as needed. That’s why numbering addendums sequentially is important—so everyone knows which change came first and what the current terms are. :contentReference[oaicite:12]{index=12}
Addendums are where important changes often happen—deadlines, repairs, credits, and closing timing. If you want someone to explain what an RE-11 changes (and what it might affect), Real Estate Two70 is here to help.