During the early years, the hat shop was located in the current Plaza de Sarriegui, then known as Plazuela de las Escuelas or de la Higuera. This location was strategic, as the post office and one of the only two hospitality establishments in the city, Fonda Isabel, were both located on the same street, Narrika.
With the demolition of the city walls starting in 1863, the city experienced enormous growth, going from 9,000 inhabitants in 1860 to 41,000 in 1900, and surpassing 85,000 in 1930. Casa Ponsol gained great prestige during this time. After Bernardo's passing, his son Agapito Ponsol e Ybarzabal continued the business.