From Builderonline.com:  A majority of home buyers—57%—encountered unexpected home projects within the first 12 months of ownership, and more than three-fourths had an emergency home repair, a new study reveals. 

According to HomeAdvisor’s True Cost Guide, the average homeowner spends 1% of their home purchase price on unforeseen repairs and emergencies each year. Broken heating and cooling systems, water leaks, and blocked pipes were among the most common emergency repairs reported by homeowners in the survey, often costing anywhere from $199 to fix a clogged drain to $2,068 to repair water damage.

Home inspections can go a long way in helping avoid future emergency expenses before purchase,  Look here for other ways to prepare for repairs and upgrades.