How to Find the North Direction of Your House Plan
Compass, Google Maps or the architect's arrow — how to fix north on a floor plan, how accurate you need to be, and which rooms a 45-degree mistake ruins.
Author - Vaastu AI Editorial
The quickest reliable method: stand just outside your main door, hold a phone compass flat at chest height, step away from the gate, the meter box and any car, and note the bearing. Then open the same address in Google Maps satellite view — the map is drawn north-up — and check that the two agree. If they do, you have north. The architect's arrow on the drawing is a third opinion, not a verdict. And you do not need to be perfect: the eight Vaastu directions are 45 degrees wide, so an error of ten or fifteen degrees usually leaves every room in the same zone. An error of 45 degrees does not.
That last part is the bit almost nobody writes about, so we will start there.
What a wrong north actually costs
Get north wrong by roughly 45 degrees and every room on the plan slides into the next zone — all of them together, all in the same direction. Whether that matters depends on which room you are looking at, and the difference between rooms is much larger than people expect.
These are the placement scores our own analysis runs on. For each room, the best zone and the two zones on either side of it:
| Room | Best zone | The two zones beside it | Worst it can be read as |
|---|---|---|---|
| Main entrance | North-East, 100 | North 95, East 90 | 90 — still ideal |
| Living room | North-East, 95 | North 90, East 90 | 90 — still ideal |
| Pooja room | North-East, 100 | East 90, North 85 | 85 — good |
| Staircase | South-West, 95 | South 85, West 85 | 85 — good |
| Master bedroom | South-West, 100 | South 85, West 80 | 80 — good |
| Kitchen | South-East, 100 | South 60, East 55 | 55 — acceptable |
| Toilet / bath | North-West, 90 | West 85, North 45 | 45 — avoid |
Read the right-hand column. A house whose entrance, living room and pooja room are correctly placed will survive a 45-degree mistake almost untouched — the north-east corner is flanked by north and east, and all three are good places for those rooms anyway. The kitchen and the toilet are the opposite. A kitchen that is genuinely in the ideal south-east can be recorded as acceptable at 55 if north is off by one zone. A toilet in the north-west — the only ideal spot on the whole toilet row — can be recorded as avoid at 45 if the error goes the wrong way.
That is not a small distortion of the score, either. In our weighting the kitchen carries 16 per cent and toilets 12 per cent; between them, more than a quarter of the number depends on rooms that a 45-degree error can move by 40 points or more. Being casual about north is the single largest source of a wrong reading in any Vaastu check, ours included.
The methods, best first
1. Phone compass, taken properly. Stand outside the main door, phone flat in your palm, and move away from anything metal — the gate, the electric panel, parked vehicles, reinforced concrete columns. Take the reading three times and take the middle one. Our free online Vastu compass does this in the browser, reads the phone's sensor directly, and lets you type a bearing in by hand if the sensor is unreliable.
2. Google Maps satellite view, as the cross-check. Find the building, zoom until you can see its outline, and note which way the front of the plot points. Maps renders north straight up by default, so the top of the screen is north. It is the best available check on a compass reading because it fails in completely different ways — satellite imagery is not confused by your gate.
3. The architect's north arrow. Approved drawings usually carry one, and on a surveyed, sanctioned plan it is generally trustworthy. Two things to check before you rely on it. Some drawings mark an assumed north for drafting convenience rather than a surveyed one, and it will usually say so near the arrow. And plans are frequently rotated to fit the sheet, so if you are working from a photo, a brochure image or a PDF someone forwarded you, confirm that what you are holding is the same orientation as the original.
4. The shadow method, when it has to be right. Plant a straight stick vertically in open ground. Mark the tip of its shadow in the morning, mark it again in the late afternoon, and join the two marks — that line runs roughly east-west, and its perpendicular is true north. It needs most of a day and some sun, but no instrument, and it gives true north directly.
On magnetic versus true north: a compass points at magnetic north, which differs from true north by a small angle that varies with where you are. Across most of India that difference is a degree or two — real, but far smaller than the 45-degree zones we are sorting rooms into. Correct for it if you want the precision, but the mistake that actually costs points is mislabelling which wall is the front of the house.
How accurate do you actually need to be?
Each of the eight directions covers 45 degrees, so north runs from about 337 degrees round to about 22 degrees. In practice:
- Within 10 degrees — every room stays in its zone. Nothing changes.
- 10 to 20 degrees — rooms near a zone boundary may cross it; rooms mid-zone do not.
- A 45-degree error — everything moves one zone, in the table above.
- 90 degrees or more — you have identified the wrong wall as the front of the house, and the reading is meaningless.
The failure worth guarding against is the fourth one, and it comes from a specific habit: assuming the road-facing side is north, or repeating what the builder said on a site visit. Two independent methods that agree will catch it in a minute.
The one thing our check cannot do for you
Our floor-plan analysis detects the rooms in the plan you upload, and then asks you to confirm two things: the room labels, and where north is. It cannot verify north on its own — there is nothing in a drawing that tells software which way the building faces unless the arrow is there and correct.
That has a good side. A genuinely badly placed room is only partly recoverable — a kitchen truly stranded in the north-east gets less than half its lost points back from anything you can do without moving plumbing and a gas line. A kitchen wrongly recorded in the north-east loses nothing at all. Fix the north setting, run it again, and every point comes back immediately, because there was never anything wrong with the house.
So spend the two minutes. Take the compass reading, cross-check it on the map, then upload your floor plan for a free Vastu check with a north you are confident about. The zones and the score you get back are only as good as that one input.