The building style is based on Federation era building (early 20th century) plus some inspiration from 2008 Town Plan. LEGO City has been missing humble retail stores of all sort, this particular model could made to serve in City or Modular ranges.
You could use the same blue and white for Mica in the U.K. or red and white for True Value in the U.S.A. – using also the correct coloured logos and merchandise stickers.
Also this could be made into a modular design if you wish as well.
Want to see this creation as a LEGO Set? It is currently up for voting on LEGO Ideas! Be one of the 10,000 pioneers and vote for free here: https://ideas.lego.com/projects/153672
MOC by Lightningtiger