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Not an expert, but groundworks are expensive. Building on an existing foundation would be easier. Include the fact that ancient cities were usually founded in advantageous locations (rivers, etc) and the existence of infrastructure (roads, local farmland) then staying put makes sense. In fact, without modern communications, if you moved, no one would be able to find you.

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I'm no expert on the matter, but I can imagine how it might be possible to maintain address records and update them as required without the aid of electronic communication.

Also, you could move home locations but still go to the same market, tavern, workplace, fields, etc, and be located there, or just tell your old neighbour you moved.

I think that if a disaster destroys your city, moving may be the only option for survival.

These city locations are often abandoned for hundreds of years at a time

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