How VastuScan Checks a Home: Our Rules, Our Scoring, and What We Can't See

VastuScan's AI does one job: it finds where the rooms, the main door and the centre are on your floor plan. Everything after that, which direction each room is in, its grade, the score and the verdict, is worked out by fixed rules that are published in full, so the same plan gets the same answer, and you can check every grade yourself.

This page explains each step, the numbers behind the score, and, just as plainly, what we can't see.

What you give it

• Quick Scan and Full Report: a photo, scan or screenshot of your floor plan. You mark the centre of the home and set north. Both matter: every direction is measured from that centre, relative to that north.
• Compass Check (no floor plan): you stand at the centre of your home, find north with your phone's own compass app, and place each room on a 3×3 grid. Useful for rented homes, older homes, or when the builder hasn't shared a plan.

Villas and duplexes can be checked floor by floor, up to five floors.

Step 1: reading the plan

The AI looks at your plan and returns, for each room, its name and outline, plus the position of the main door and the centre. It also takes a closer look at the door and the centre, because those two points matter most.

If the plan is too faint, blurred or cluttered to read reliably, VastuScan stops and says so rather than guessing. A wrong reading would give you a confident answer to the wrong question.

Step 2: measuring the directions

This step is plain geometry, done in code:

• The circle around your home's centre is divided into 32 slices of 11.25°, starting from the north you set.
• Each room's outline is laid over those slices. A room counts in every slice that holds at least 5% of its area, so a large room spanning two directions is treated as being in both.
• The main door counts in every slice that holds at least 20% of its width.
• The slices group into 16 directions for rooms, and into 32 entrance padas for the main door.

No model decides a direction. If you move the centre or turn north, the directions move with them, which is also why marking those two points carefully matters more than anything else.

Step 3: grading every room

Each room is then graded by looking it up in VastuScan's Vastu rules: 13 room types, each graded in all 16 directions, and the main door graded by its exact pada.

Where a room spans more than one direction, the worse grade counts. The centre of the home (the Brahmasthan) is graded as well: a toilet, kitchen or staircase there is a serious problem; an open living room or passage is ideal.

Step 4: the score

Each grade earns points, and rooms count for different amounts:

Grade	Points
Ideal	100
Acceptable	85
Problematic	50
Critical	0

Room	Weight
Main door	20
Kitchen, master bedroom, each toilet	15 each
Living room, pooja room	10 each
Every other room	5

The weighted average is the home's score out of 100, and the score decides the verdict:

One Critical defect caps the whole home at 40 and makes the verdict Avoid, however good everything else is. That is deliberate. A Critical defect is one that no remedy can fix, so no number of well-placed rooms should hide it.

The score is fixed before any text is written. The report can explain the score; it can't change it.

Step 5: remedies and the score you can reach

Every problem comes with remedies from the knowledge base, ranked by what they cost:

The report also shows the score after remedies: what the home reaches if every remedy is carried out. Remedies close two-thirds of the gap for an Acceptable placement and half the gap for a Problematic one. They do nothing for a Critical one. And a home where most of the plan is wrong gets a lower ceiling, because room-by-room remedies can't fix a layout that is wrong as a whole.

Step 6: the written report

Only now does the AI write: a summary, what is working, what isn't, and what to do, from the fixed results above. In the Full Report it also describes the balance of the five elements and suggests colours for each room. The element balance is the AI's reading of your layout, not a calculation, and the report treats it as such.

After that you can ask Deesha, VastuScan's AI Vastu guide, about your own report, or send her a photo of a room to ask what it means. She answers from your report and the same rules.

What VastuScan can't see

A floor plan is not the whole home. VastuScan does not assess:

• The plot and surroundings: slope, roads, a T-junction, neighbouring buildings, the soil, water on the site.
• What's above and below you in a building other than your own floors.
• How you use a room, where that changes the answer. A pooja room in the west is graded both ways, and the report explains both.
• Septic tanks, borewells and lifts: not in the rules yet.
• Anything structural. VastuScan is guidance based on Vastu Shastra, not architectural, structural or financial advice. For construction, consult a professional.

And a wrong input gives a wrong answer: a misplaced centre or a brochure north arrow that is off by 90° will move every room into the wrong direction. If something in your report looks wrong, check those two first.

Questions to ask of any Vastu check

Whichever tool or consultant you use, these questions tell you how much to trust the answer:

1. Does it confirm north with you, or assume the top of the page is north?
2. Does it measure from the centre of the whole home, and show you where that is?
3. Are its rules published, so you can check a grade yourself?
4. Does it tell you plainly when something can't be fixed, or does every problem come with a product to buy?
5. Will the same plan get the same answer if you check it twice?
6. Does it say what it can't see?
7. What does it ask of you before you start? A phone number, an account, a payment? And what happens to your plan afterwards?

VastuScan asks for sign-in with Google, Apple or email, never a phone number. Your plans are private to your account, never sold and never used to train AI, and you can delete a home or your whole account at any time.