Retail Space Lease Proposal

I'm not sure exactly what you're looking for. Are you looking to rent a specific office in a particular lot? If so, you do not require a proposal of any kind. All you must do is contact the realtor and request information regarding the space to be rented. The only things you really need proposals for are: 1) building proposals for the contraction of building construction and 2) business proposals for loans from the bank (after you've acquired a rental office/business property.) Those are the only two proposals that I can think might be somewhat relevant to what you asked for. But a rental proposal is not something that realtor's require in order to rent a property. Does that help?