A good construction proposal can be your showcase, your protection, a legal contract, and a great marketing and sales tool for your construction company. What is a construction proposal?What to include in a construction proposal. This joint venture agreement template can be filled out in minutes, helping you and your partner establish a legally-binding joint venture agreement. Include methods to measure project progress against the plan. Use our Business Proposal to secure potential clients, outline value proposition, and convince a company to enter a business relationship with you. Please list all subcontractors below.