noun
Describes a location across the street and offset by one, not directly opposite. Often used for houses or shops.
郵便局は、この店の筋向かいにあります。
The post office is diagonally opposite this shop.
彼の家は私の家の筋向かいだ。
His house is diagonally opposite mine.
向かい means directly opposite, while 筋向かい means diagonally opposite, one lot over.
Compound of 筋 (すじ, 'line' or 'street') and 向かい (むかい, 'opposite'), literally 'street-opposite', referring to a position across the street and slightly offset.