Sanford Jones, a foreman with Weatherguard Inc. of Longview, makes his way up a ladder Friday to the roof of a house on Officers Row. While all the houses are at least 100 years old, “The prize was the Marshall House,” Jones said. “That was the cream of the crop of the job.” Officers Row has sheltered some significant historical figures in the last 150 years.These days, it’s a place where people can lease a residence or an office, eat lunch at the Grant House or soak up some heritage in the Marshall House. And for years to come, they will all have a roof over their heads.A preservation project is putting new roofs on 11 buildings on Officers Row, a stretch of Evergreen Boulevard that provides a portal to Vancouver’s 19th-century roots.o The oldest of the 21 houses on Officers Row is the Grant House, built in 1849; the newest was built in 1907.The project’s partners — the city of Vancouver, the National Park Service and the nonprofit Fort Vancouver National Trust — illustrate the row’s blend of roles as municipal asset and national cultural resource.After the U.S. Army declared it surplus, the city acquired Officers Row in 1984 for $1. But it took an $11 million rehabilitation project to get the buildings presentable again.Now the Fort Vancouver National Trust, which manages the property for the city, has put together a capital facilities plan to keep ahead of maintenance and preservation problems.