Craft a winning house offer letter with our customizable template and tips. From the date this Letter is fully executed (the "Letter Effective Date"),.Do you know how to write an offer letter for a house? We're here to teach you the ins and outs to improve your chance of closing a deal. Here are house offer letter samples to win a bidding war. 3 examples to use as a reference point. Focus on three things: State your intentions, show that you have the financial means to make the purchase and make a personal appeal to the seller. A simple, one-page cover letter is crucial to explaining your offer's basic details. It will help the average person see past any confusion they might have. Earnest money amount and who it will be delivered to (title company of your choice) within x days of execution.