Typically, who did the construction of the missions?

The actual construction of the mission buildings usually began with the construction of temporary structures, with the work done by the founding missionaries and the soldiers and neophytes who were part of the founding party. The mission buildings (the church, padres quarters, quadrangle, neophyte housing, storehouses etc.) evolved over decades and in most missions, construction and repair was continuous. The building was done under the overall supervision of one of the padres but the actual work was performed by the Indian neophytes.