Presently, tags building and construction are both in existence.
The overwhelming use of both seems to be similar -- questions relating to edifices and how they were set up (either by someone or in a specific location) though only four questions include both tags right now. Additional uses -- that wouldn't match the alternative -- seem to include, for building, questions about specific buildings (e.g., like this one here, but this one -- essentially similar -- isn't tagged building), and, for construction, questions about how/when/where specific things were built (e.g., like this one here which concerns ships).
Should something be done to modify these tags, possibly through combining the two?
An additional question, as some of the construction questions relate to building ships, is whether a specific ship-construction tag (naval-architecture/ship-construction) is more apt than construction which is optimal for fixed-structures (let's not go too far into naval architecture here...).