What is an agreement of purchase and sale addendum?
An addendum is a written supplement to an agreement of purchase and sale that modifies, clarifies, or adds conditions to the original contract between buyer and seller.
When a buyer and seller in London, Ontario negotiate a real estate transaction, they may need to adjust terms after the initial agreement is signed. An addendum is a supplementary document that does exactly that, amending or introducing new conditions to the existing agreement of purchase and sale without replacing the entire contract.
Common reasons for addenda include changes to closing dates, adjustments to included fixtures or chattels, modifications to inspection timelines, updates to financing conditions, or clarifications on property repairs. In residential sales, these changes often arise during the home inspection period or when financing terms shift unexpectedly.
Both parties must agree to and sign the addendum for it to become binding. The document becomes part of the contract and carries the same legal weight as the original agreement. Real estate agents and lawyers in the London market regularly prepare and coordinate addenda to reflect the negotiated changes between buyers and sellers. Without a formal addendum, verbal agreements or informal notes have no legal standing.
Understanding how addenda work matters for both sides. A buyer might use an addendum to add a financing condition after learning their mortgage approval is delayed. A seller might propose one to extend closing because their new home is not ready. These documents protect all parties by making changes explicit and documented, which is especially important in transactions involving residential real estate sales where significant money and timelines are at stake.