Plot shapes: square, wide-back, narrow-back, corner — beliefs and legal checks

The feng shui parts are traditional beliefs that many people consult, not legal rules. Legal figures come from the reference source listed at the end of the article and may differ by locality — always check the planning and regulations where the land is. Updated 23 October 2026.

A plot that is "good" by feng shui and a plot that is "easy to build on and easy to sell" usually coincide on one point: a tidy shape with a lot of usable area. But the final decision should rest on legal status, planning, setback and design feasibility, and only then on beliefs about shape. Here is how to look at each kind of plot.

Common shapes

Shape	By feng shui belief	Practical side
Square, rectangular	Seen as balanced, "storing wind and gathering qi"	Easy to lay out rooms, easy to work out the buildable area, little wasted area
Wide-back (nở hậu — the rear is wider than the frontage)	Usually seen as good, tied to the idea of a "widening later fortune"	A large area at the back, but a narrow frontage can limit light and airflow from the front
Narrow-back (thóp hậu — the rear is narrower than the frontage)	Often avoided	The rear is hard to lay out; the usable area is smaller than the area on paper
Corner plot (two frontages)	Beliefs are not uniform; some like it for being airy, some dislike it because qi escapes easily	Lots of light, good for business; may be subject to a setback or corner cut under planning, and noise on two sides
Triangular, irregular	Often said to find it hard to gather qi	The pointed part is hard to use; design and construction cost more
Plot with a narrowing foot or slanted tail	Depends on the viewpoint	Needs re-surveying and checking the boundary against the certificate

The beliefs about "wide-back" and "narrow-back"

In Vietnamese, "wide-back" (nở hậu) is associated with good fortune later, and "narrow-back" (thóp hậu) with the opposite. This is a folk metaphor. What can be verified is the actual buildable area: a wide-back plot usually gives wider rooms at the back, and a narrow-back plot the reverse. Some people buy a narrow-back plot because the price is lower; if you are one of them, ask an architect to draw a preliminary scheme before paying a deposit so you know the usable area.

Legal checks before looking at shape

1. Certificate and the site: check the boundary and area on the certificate against the actual survey. Irregular and narrow-back plots easily show a gap between the certificate and reality.
2. Planning and setback: ask the local planning authority. Land that falls within the setback for road widening cannot be built on; corner plots are the most easily affected.
3. Minimum buildable size: according to one reference source, for street-front houses in a planned area, a plot adjoining a road with a setback width of 20 m or more needs a minimum area of about 45 m², with both width and depth of at least 5 m; for a smaller road setback: about 36 m², width and depth of at least 4 m. For a plot in an alley, plots under 15 m² are usually strongly limited in area and number of floors. Specific rules are issued locally — check before buying.
4. Building density: the reference source gives maximum density for private houses of about 100% for plots of 90 m² or less, 90% for 100 m², 70% for 200 m², 60% for 300 m², 50% for 500 m², and 40% for 1,000 m² or more; the land use coefficient must not exceed 7. This is the net building density of the main structure, not counting yard, pool or parking. Localities may set their own rules.
5. Access and infrastructure: the access road is wide enough for fire trucks and material trucks; electricity, water and drainage are available. See also checking a project's legal status when buying within a project.

Why even a "good" plot needs light and wind to be considered

Beliefs about plot shape are in fact tied to very ordinary things: whether the house gets enough sun, ventilation and drainage, and is easy to get around. A wide-back plot usually helps the rear rooms stay airy; a narrow-back plot has to deal with a light well and rear kitchen. A corner plot allows many windows but noise and privacy need thought. When a plot is favourable on these points, many people also feel more at ease from a feng shui point of view.

Return and resale

Shape affects design, so it also affects how easy a plot is to sell. A square plot with a wide frontage is generally easier to sell than an irregular one, but the price depends mainly on location, access road, legal status and local liquidity. There is no basis to say that one shape will surely rise or fall in price.

Suggestions for balance

• Prefer a plot with clear legal status, no planning conflict and enough size to build.
• If you like a wide-back or corner plot: check the setback and the build-line step-back.
• If a narrow-back plot is reasonably priced: try a design scheme before deciding.
• If you need a ready-built home: see the units in projects being distributed to compare real floor plans.

Note: This article is for reference and does not replace the certificate, planning information or the advice of an architect or lawyer. HPR does not promise that any plot shape brings wealth or price increases.

• Batdongsan.com.vn Wiki — Bao nhiêu mét đất thổ cư thì được xây nhà? (minimum size, building density, land use coefficient; page updated 14 December 2023, accessed 23 October 2026). The density table on the page is badly formatted — the figures are for reference and need checking against the standard and local rules.