The only major alteration to the structure is a new front porch, built sometime after 1898.

The only alteration since then has been a metal roof, added in 1981.

It is about the only alteration I have made in the house, and my only real luxury.

The only alteration has been the removal of the bell tower.

Since its construction, the only significant alteration was the addition of the west wing in 1950.

The course has remained in its original layout with only minor alterations.

The only alteration since has been the creation of a lounge in 1984.

The only major alteration, however, is the mist screen projection.

Therefore the only alterations necessary were to the songs' export settings.

That has been the only significant alteration to the building's exterior.