Apartment feng shui — which door counts?
Published 2026-08-20
In an apartment there are at least two doors with a claim to being the front door: your own, and the one at the bottom of the building. Eight Mansions (八宅, Ba Zhai) needs exactly one facing direction, and the two doors usually point different ways, so they produce two different charts for the same rooms. Practitioners genuinely disagree about which one to take, and we are not going to resolve it for you here.
The two candidates, and a third
- Your own apartment door. The unit is treated as a house in its own right. Take the bearing of the wall your own entrance sits in, and the chart covers your unit only.
- The building’s main entrance. The block is treated as the house and your unit as a room inside it. Every apartment in the tower then shares one chart.
- The open side of the unit. A third reading, and the same split covered in what the front door direction actually sets: some practitioners take facing from the brightest, most open side rather than the door. In an apartment that usually means the balcony or the main window wall, and it is the only one of the three that works when your own door opens onto a windowless interior corridor.
None of the three is a fringe position. The classical material this school comes from describes standalone buildings with a single entrance, so it has no clause about towers, corridors and elevators.
How far apart the two charts land
Take a building whose main entrance faces south, 180°. That is a Kan house sitting north, gua 1, East group. Now take a unit inside it whose own door is in a wall facing east, 90°. Read on its own that is a Dui house sitting west, gua 7, West group. Same rooms, same walls, both readings computed by the compass bagua map:
| Sector | Read from the building entrance (Kan) | Read from the apartment door (Dui) |
|---|---|---|
| North | Fu Wei — favored | Huo Hai — weak |
| Northeast | Wu Gui — weak | Yan Nian — favored |
| East | Tian Yi — favored | Jue Ming — weak |
| Southeast | Sheng Chi — favored | Liu Sha — weak |
| South | Yan Nian — favored | Wu Gui — weak |
| Southwest | Jue Ming — weak | Tian Yi — favored |
| West | Huo Hai — weak | Fu Wei — favored |
| Northwest | Liu Sha — weak | Sheng Chi — favored |
All eight sectors reverse. There is no room in that apartment where the two readings agree, which means every placement — bedroom, bathroom, storage, desk — comes out the other way round depending on a decision Eight Mansions does not make for you.
It is not always that bad. The two guas here fall in opposite groups, which is what produces a clean eight-out-of-eight reversal. If your two candidate doors land in the same group, the four favored sectors are identical in both readings and only the star names inside them move. Check that first: run both bearings, compare the groups, and if they match, which door won stops mattering.
What each choice commits you to
Neither option is just a bearing. Each one carries a position about what a home is.
| Apartment door | Building entrance | |
|---|---|---|
| The unit is | A house | A room in a house |
| Neighbors across the hall get | A different chart, possibly the opposite group | The same chart you have |
| Needs | A bearing you can take at your own door | A bearing at the lobby, plus your unit’s position in the block |
| Breaks down when | The door opens onto an interior corridor with no outside reference | The tower is irregular, has several equal entrances, or is a podium block |
| Also implies | Nothing above your ceiling matters to your chart | The shape and entrance of the whole block matters more than your walls |
Each column has a consequence people find uncomfortable. If the building entrance governs, two units on opposite sides of a corridor read identically and the elevator core counts for as much as your own front door. If your own door governs, a fifty-unit tower contains fifty charts, and your neighbor across the hall may be in the opposite group while sharing your wall. That is the actual state of practice, not a gap in the arithmetic.
The three-door bagua does not have this problem in the same way
The other system called a bagua map handles apartments differently, because it never takes a compass bearing at all. The three-door bagua — taught in the West since the 1980s, also called BTB or Black Sect — lays nine squares over the floor plan aligned to the wall the front door is in, and rotates with that door rather than with north.
So the question changes shape. There is still a choice of door, but most teachers of this method use the door you come home through, which in an apartment is your own unit door rather than the lobby. And because the grid is aligned to that door instead of to a bearing, the answer does not depend on which way the building points — the far-left corner as you walk in is the wealth area in every home laid out this way.
It is not a reason to mix them: reading your sectors one way and applying a remedy from the other produces a map that belongs to neither. Two things are called a bagua map has the tells for working out which one a source is using.
If you are going to take a bearing anyway
Whichever door you decide on, sector edges fall 45° apart, at 22.5°, 67.5°, 112.5° and so on, so a bearing two degrees off can move the house into the neighboring gua and opposite group. Apartment buildings make that worse than houses do: reinforced concrete, steel door frames, elevator machinery and rooftop plant all sit near the places you would naturally stand. Take the bearing outside, away from the structure, and more than once.
Eight Mansions names a sector and attaches a theme to it, and so does the three-door bagua with its areas. Neither predicts anything about the people living in the apartment, and neither do we. Method and assumptions sets out where our tools stop.