Question 1

Where is Maison Wealth?

Accepted Answer

Maison Wealth is in Yokohama, Kanagawa Prefecture, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Fate/stay night: Heaven's Feel does Maison Wealth appear in?

Accepted Answer

Maison Wealth appears in EP1 of Fate/stay night: Heaven's Feel.

Question 3

Can I visit Maison Wealth?

Accepted Answer

Yes. Maison Wealth is a real place you can visit. Check what it looks like on Street View before you go.

Question 4

Where was Fate/stay night: Heaven's Feel filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Maison Wealth is one of those real places (EP1).