architypes.net - Responding to Local Architecture

A building should respond to existing buildings and vernacular architecture in its vicinity or neighborhood.

This does not mean that a building should mimic or be an exact copy of the buildings around it. Ideally, each building should have its own character that distinguishes it from its neighbors, while also having many aspects in common with its neighbors to tie the buildings together into a community.

Aspects of neighboring buildings to consider here include:

Size / scale
Proportions
Detailing
Orientation
Architectural style
Formality

In a stuation where there are significant differences in scale between neighboring buildings, large buildings will tend to dominate smaller buildings. The result is often to the deteriment of both the larger and smaller building.

Unless you are intentionally juxtaposing two buildings of signficiant difference in scale for the purpose of contrast, and particularly if there is not ...