I am looking for one word that describes a person who has an eye for detail. This also could be a person who may find it difficult to focus on the global picture as the individual's attention is focused in the details or building block, rather than on the house.
I think you're asking for 2 things.
If you're talking about a person who has problems seeing the big picture, because they are so focused on details, consider 'myopic' (MW, definition 2):
a lack of foresight or discernment : a narrow view of something
A sample sentence would be
Bob is a skilled accountant, but sometimes he's so myopic that he spends all day balancing the petty-cash account to the penny, rather than finding the best way to file our taxes.
Observant fits your description
This also could be a person who may find it difficult to focus on the global picture as the individual's attention is focused in the details or building block, rather than on the house.
The overscrupulous TSA agent confiscated the monkey's two-inch-long toy sidearm — Kyle Peterson m-w
Scrupulous means thorough, exact, and careful about details. Collins
They can be overscrupulous in moral behavior and excessively clean and tidy. They are bound to pay too much attention to detail, to the point that they miss the big picture (they can't see the forest for the trees). Jason Williams; The Mental Edge in Trading (2012)
At the risk of duplicating Le Duchat's special brand of pedantry, I will include only one passage exemplifying this overscrupulous attention to detail. Theodore Fraser; Le Duchat, First Editor of Rabelais (1971)
Behind those eyes, Garth knew, would bea kind of fanatic: over dogged, overscrupulous, in the smallest detail of conduct. John Dickson Carr; The Witch of the Low Tide