Renovation and Repair
Renovation refers to the modification of an existing building.
A common renovation is removing interior walls to open up a floor plan.
Repair fixes a building after it has suffered damage.
Typically repairs happen after a fire or hurricane.
Retrofit is when an existing building is strengthened to better resist damage from
a particular source, such as high winds. This is sometimes called strengthening or hardening.
Adaptive re-use is when the structure is modified to support a different function.
An example would be an old fire station being turned into a library.