Make your opener as personal as possible. 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., 20 ("Offer Reference Date"). Sample House Offer Letter. Here are house offer letter samples to win a bidding war. 3 examples to use as a reference point. Ready to put a bid on your new property? Download FortuneBuilders' free real estate offer letter template so your proposal stands out. 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.