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.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. It must be completed with the financial requirements of the FTHB program in mind and on this form. Lender pre-qualification letters will not be accepted. Here are house offer letter samples to win a bidding war. 3 examples to use as a reference point. An effective home offer letter focuses on the positive traits of the house. Lenders may call the FTHB Program Manager at (703) 246-5099 if there are questions about completing the form. General Requirements.