In order to show the direction of construction and maintenance in green wall planning for university buildings, the questionnaire surveys were performed on users to evaluate their preference of green walls with various environmental mitigation effects by conjoint analysis. For the both green-covered and uncovered buildings’ users, green coverage ratio was important factor comprehensively. Especially, for green-covered building’s users, the environmental mitigation effects to the rooms were found as significant value. It is considered to be cost-effective for building owners to pay maintenance cost for high coverage of green walls.
