An object of the present invention is to provide a renovation construction estimating system by which a construction company can obtain estimation information of a plurality of wholesalers. A remodeling construction estimating system (1) includes a plurality of wholesaler terminals (2, 2,...) That sell items of a product used for the renovation work, and estimate information including an estimated amount of each item. And stores it in the storage unit. Then, when a request for quote information of a specific product is received from the construction shop terminal 3, the quote information of the product is extracted from the storage unit, and the extracted quote information is transmitted to the construction shop side terminal 3. [Selection diagram] Fig. 1
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