You will increase the Villa's value and receive special discounts by renovating any of the five shops located in the Villa. Each shop has three renovation levels. The blacksmith and doctor are available at the beginning of the game. The following is how much each of the three renovation levels cost for each shop.

Ant Merchant: 1,000, 5,000, 8,000 Florins.
Bank: 1,500, 5,000, 9,000 Florins.
Blacksmith: First renovation already available, 7,000, 12,000 Florins.
Doctor: First renovation already available, 3,000, 5,000 Florins.
Tailor: 1,000, 2,500, 5,000 Florins.