To build too much of something, usually buildings or houses.
Overconstructing can make people think of crowded cities or wasted resources.
Examples:
They overconstruct the city and now there are too many buildings.
We shouldn't overconstruct the park with too many benches.
The builders overconstruct the houses and now there are too many.
Don't overconstruct the cake with too much icing!
He tends to overconstruct his Lego creations, using too many pieces.
The city overconstructs and now there are too many buildings.