সাঈ on upper floors is valid জমহুর উলামাদের মতে, as the floors are within the boundaries of Safa and Marwah — upper floors are মুস্তাহাব for elderly and families due to less crowding.
Yes, performing সাঈ on the upper floors of the Mas'a (সাঈ corridor) is valid according to the vast majority of contemporary scholars. The Saudi Arabian expansion of মসজিদুল হারাম added multiple levels to the সাঈ corridor to accommodate the growing number of হাজীগণ. These upper floors are constructed between the same two hills of Safa and Marwah, within the legitimate boundaries of the সাঈ path.
The permissibility is based on the principle that what matters is walking between Safa and Marwah within their boundaries — the vertical elevation does not change the fundamental act. This is analogous to performing তাওয়াফ on the upper floors of the Mataf, which is universally accepted. Major scholars and the Saudi fatwa committees have affirmed the validity of upper-floor সাঈ.
Practically, the upper floors offer significant advantages: less crowding, smoother flow, better accessibility for wheelchair users, and a cooler environment. The green markers indicating where men should hasten their pace (raml) are present on all floors. The distance per lap is essentially the same regardless of floor level. For elderly হাজীগণ, those with mobility challenges, or families with young children, the upper floors are strongly মুস্তাহাব for a safer and more comfortable সাঈ experience.
Source: Saudi Permanent Committee for Scholarly Research and Ifta (al-Lajnah al-Da'imah)