A staircase aimed straight at the front door is one of the layouts that gets flagged in every feng shui school, and unlike some warnings it has a plain physical explanation alongside the traditional one.
In traditional terms, the front door is the mouth of the house and the staircase is a channel. When the channel points at the mouth, what comes in is said to run straight back out, and wealth and stability are described as hard to hold.
The physical version is easy to test. Stand at your front door on a cold day with the upstairs heating on and feel what happens. Warm air rises up an open stairwell and pulls replacement air in through the door. It is a chimney, and it is expensive.
There is also a privacy and noise effect: sound from the whole house travels down the stairwell to the entrance, and anyone at the door can see further into the home than they would in a hall with a turn in it.
1. Slow the line down. A runner, a stair carpet, or a series of framed pieces along the stair wall breaks up the visual run from the door. This is the cheapest change and it does real work.
2. Put a plant at the turn. A substantial floor plant at the bottom of the stairs, off to one side, interrupts the straight path. It should be something with some mass to it — a small pot on a stair tread does nothing.
3. Hang a light fixture. A pendant or chandelier over the stairwell, low enough to intersect the sightline from the door, is a traditional recommendation that also fixes what is usually a badly lit space.
4. Use a console or a narrow table. If the hall is wide enough, a narrow table against the wall with a lamp creates a pause point between the door and the stairs, and gives you somewhere to put things down.
5. Fit a door at the top or bottom. Closing the stairwell off is the most effective structural fix and the most disruptive. Even a salvaged door on a simple latch changes the airflow considerably.
6. Rebuild the bottom step. Turning the last two treads so the stair approaches from the side rather than head-on is the permanent solution. It is a building job, and usually only worth it during a renovation.
Items one through four are all removable. A stair runner held with gripper tape rather than nailed, a rented plant, a plug-in pendant if there is a hook, and a freestanding console will all come with you when you move.
If the stairwell is the only source of light and you cannot add a fixture, the priority flips: fix the lighting first, because a dark stair is a safety issue before it is a feng shui one.
If the stairs are partially screened already — by a wall return, a half-height partition, or a doorway you pass through before the stair comes into view — the alignment is broken and you can skip the whole exercise.
The rule applies to the line of sight and the airflow from the door. If you have to walk into the hall and turn a corner before the stairs are visible, this is not your problem.
Related but different. That one is the through-hall or 'rushing wind' pattern, where air crosses the whole house. Stairs facing the door is a vertical version of the same idea, and the fixes overlap.
Less so. A spiral slows and curves the flow rather than channelling it, which is exactly what the straight-run fixes are trying to achieve. Most practitioners treat spirals as much less of a concern.
It is a common suggestion, but a mirror facing the front door reflects energy back out of it, which is generally advised against. Use a plant or a light fixture instead.