民間合建常見有傳統民間合建與民辦都市更新二種，然而不論是傳統民間合建或民辦都市更新，各有其執行上的特點。因此本研究旨在評估建設公司選擇執行傳統民間合建亦或執行民辦都市更新的開發價值為何。而為達到上述之目的，本研究透過建築開發相關文獻與業界專家的訪談，彙整出傳統民間合建與民辦都市更新二者影響開發價值的變數，並各別將其寫成報酬函數，分別為無時間價值的會計報酬率法、考慮時間價值的淨現值法、包含決策彈性的實質選擇權法等三種。最後以電腦軟體建構一套價值評估系統，提供建設公司評估上述二種合建類型開發價值之參考。

There are two kinds of joint construction, traditional joint construction and urban renewal. Both of joint construction method have their unique properties. Thus, this study main to looking into both traditional joint construction and urban renewal’s development value. As described above, through the related documents and experts to define the factors that influence the development value and so to assessment the joint construction project value. After find out the influence factors then use the influence factors written in mathematical functions, including: Accounting Rate of Return method which do not consider about time value, Net Present Value method which do consider about time value, and Real Option which consider about the flexibility of decision. And finally using computer to establish a value assessment system and evaluate the project value, then to provide construction company as a reference when going to execute a joint construction project.

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