If your question is pertaining to the steps to actually build the building - that may be too detailed and beyond the scope of this group. When you are ready to begin , I suggest you engage the services of a professional design or architectural firm, who can help you with site selection, plan approvals and construction oversight.
If your question is related to the funding of a commercial building – then the first step is to determine financial viability – can the building generate sufficient revenue to cover expenses and service the debt for construction.
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Capital Catalysts for Entrepreneurs
Home of the Scalable Business Plan
and QuikStart Capital Programs