Feng Shui House Numbers: Choosing an Address That Works

How a house number becomes a base number

The method is short and you can do it by hand, which is useful because it lets you check any calculator rather than trusting one.

1. Take the number on the door. In the traditional method this is the last digit of the number, not the whole thing. For 27, use 7; for 104, use 4.
2. Reduce it further if needed. For a double-digit number, some practitioners add the digits together as well — 27 becomes 2 + 7 = 9. Others do not. The safer approach for a modern reader is to work with the last digit as the primary figure and note the reduced number as secondary, and to treat 5 as a special case.
3. Handle five. Five sits in the centre palace and has no direction of its own. It is reassigned: to two for men and to eight for women. A house numbered five is therefore a mixed address rather than a bad one.
4. Match it against the kua. The base number of the house is compared with the kua numbers of the occupants. Where they agree, the house supports. Where they clash, the effect is described as a friction the occupants have to work around.

For flats and maisonettes the question is more complicated, because the block number, the building number and the flat number each carry weight. The convention most practitioners use is that the flat number dominates internally, the building number sets the wider context, and the street number is the outermost layer. The lucky number calculator handles the personal layer, and the eight mansions calculator gives you the figures to match against it.

The number virtue table

Each number corresponds to a trigram, an element and a set of behavioural qualities. This is the reference layer for any judgement about an address.

Why eight is the most sought-after. Eight is associated with wealth, and in Chinese culture it is the second of the three auspicious numbers after nine. The phrase ba fa (eight, prosperity) is one of the most common good-luck wordplays, which is why the number appears so often in business names, phone numbers and account references. It is also the base number of the Ji trigram, the mountain, which represents steadiness and accumulation.

Why four is avoided. Four sounds like the word for death, which is a linguistic coincidence rather than a classical feng shui rule. The virtue system treats four as difficult because of its association with conflict, but many buildings, particularly in Asian markets, skip it on floor numbering altogether.

Matching the number to your personal kua

An address number is not judged in isolation. The traditional test is compatibility between the house’s base number and the kua number of the head of the household, and the classical rule of thumb is that the two should be the same or in a supportive relationship.

The matching groups. Numbers 1, 3, 4 and 9 form the East group; 2, 6, 7 and 8 form the West group. Within the West group, six and eight are considered especially good. Where the house number and the occupant’s kua are the same, the effect is described as being fully supported — the home amplifies the person. Where they are in the same group, it is generally workable. Where they are in opposite groups, the house and the occupant are described as working against each other.

Where the disagreement is strongest

The classic problem case is a house numbered four with a kua nine occupant, or a house numbered nine with a kua four occupant. Both are mismatches in the same group, and the traditional advice is to reinforce the occupant’s own element in the interior rather than to try to change the number.

The practical view

Nobody chooses their address for feng shui reasons in most cases. So the honest framing is that the number is one variable among many, and a mismatched address is a reason to look after the interior more carefully, not a reason to move house. The lucky numbers guide covers the personal layer in more detail, and the house facing direction usually matters considerably more than the number.

Flat numbers, building numbers and floors

Multi-storey housing adds layers that a detached house does not have, and the layers interact.

The flat number is the primary figure in most practitioners’ reading, because it is the number the occupant lives with daily and it corresponds most closely to the door of the home. A flat 8 on the second floor of a building numbered 3 is read primarily as an 8.

The floor. The floor is treated as a number in its own right, and in the classical system the floor and the flat number combine. A second-floor flat is read as 2 in the house-number logic, which is why ground-floor flats are often described as slightly vulnerable and upper floors as progressively better.

The building number. This is the outer boundary. It cannot be changed by the occupant, so it is treated as a condition to be compensated for rather than a problem to be solved.

The street number is the outermost layer again and applies to the whole property rather than to the household.

Practical steps when choosing among flats

• Weight the flat number more heavily than the building number.
• Prefer a floor that is not ground level, and not the top floor if the building has a sloping roof.
• Check whether the flat number contains a four. Some developments renumber specifically to avoid it, which tells you the developers think it matters to buyers.
• Look at the entrance as well as the flat. The entryway and the shared lobby affect everyone in the building, and a well-kept entrance is worth more than a favourable digit.

When you cannot change the number

Most people cannot change their address, so the useful question is what to do with the number you have. Four approaches, in order of how much they achieve.

1. Bring in the trigram element of your number at the door. This is the classical remedy and it is direct. A number 3 or 4 belongs to the wood element, so wood objects at the entrance — a plant, a wooden planter, a bamboo mat — bring the number’s own energy into balance rather than leaving it unbalanced. A number 6 or 7 is metal, so brass hardware, a metal number plaque or a metal doormat works. A number 1 is water, so a shallow bowl of water or a glass feature. This is element-matched rather than generic decoration, which is what makes it work.
2. Lead with your own element indoors. Where the house number and your kua disagree, the interior becomes the place where your own element dominates. Colour, materials and object placement all count. The element and colour matcher gives the full palette for each element.
3. Make the number work visually. A well-designed number plaque, and a door and frame painted in the number’s element colour, work together with the number rather than against it. This is covered in the front door colour guide.
4. Improve the flow of the whole entrance. A dark, blocked entrance is a bigger problem than a difficult number. Clearing the floor, adding light and interrupting any straight-through view are the changes that matter.

What you should not do is treat the number as a reason to move. A house with good light and a clear entrance is good, and no address number changes that.

Choosing an address when you have the chance

If you are buying and you have a genuine choice between addresses, here is how to use it sensibly without overthinking it.

Decide what matters most to you. For most buyers, in order: the facing direction of the door, the layout and light, the address number, then the rest. If you have the choice, spend your attention accordingly. A south-facing door with a workable number beats a perfect number on a north-facing door with a poor layout, every time.

Compare within the same property type. When choosing between flats in one development, the differences that matter are the flat number, the floor and the aspect. Prefer an east or south-facing flat with a good number over a north-facing one with a better number.

Check the number against your own kua before you check anything else. Run both numbers, look at the group match, and use that to break ties. The lucky number calculator gives you the personal figures.

Look at the number as it will be read. The number on the door is not the only place it appears. It appears on your post, on your bank statements, on your deliveries, on a nameplate and on a bill. A number with a four will be seen several times a week, which is worth remembering if you are sensitive about it.

Do not pay a premium for a number. The premium is real, it is often significant, and the feng shui benefit of a better digit in an ordinary house is marginal in comparison with spending the same money on the layout, the light or the kitchen. The tradition rewards attention, not expenditure.