Chennai plot & building rule guides
Everything below is computed by the same deterministic rule engine that powers the Plot2Plan floor plan generator — the setbacks, FSI and height limits of the Tamil Nadu Combined Development and Building Rules, 2019, applied to real plot sizes. No estimates by eye, no AI guessing at legal numbers.
The rules
- Chennai setback rules, FSI and height limits (TNCDBR 2019) — front setback by road width, side and rear setbacks, FSI 2.0 and the 12 m height cap explained.
- Plot buying checklist — documents to verify before you buy — mother deed, EC, patta/chitta, layout sanction and the rest: every check, its red flags and who verifies it.
What Plot2Plan does
- 2D to 3D floor plan, and a walkthrough you can step inside — how a plot becomes a validated plan, a 3D massing view and a first-person tour, free and in the browser.
- Floor plan from a photo or a walkthrough video — digitise an old plan sheet, or rebuild a house you can only film, into an editable rule-checked plan.
Plot2Plan compared with other floor plan tools
Already tried a generic floor plan app? These pages set each one beside Plot2Plan feature by feature — what they say they do, on the pages we read and the date we read them, and where they are honestly the better tool.
Construction calculators
Bricks, plaster, concrete, steel, water tanks, tiles, paint and the staircase — free material calculators using standard trade practice, which a generated plan can pre-fill with wall areas measured off its validated geometry.
- Compound wall cost calculator — ₹ per running foot — price the boundary wall and gate line by line, see exactly what makes it cheaper or dearer, and check the rate a contractor quoted you.
What can you build on your plot?
Setbacks, buildable footprint, maximum built-up area and floors for the plot sizes Chennai actually trades in:
House plans by facing
The facing decides where the entrance, kitchen, pooja room and master bedroom go as per Vastu — each facing × size pair has its own guide:
- East-facing 20×30 ft plan
- East-facing 20×40 ft plan
- East-facing 24×36 ft plan
- East-facing 25×40 ft plan
- East-facing 30×40 ft plan
- East-facing 30×50 ft plan
- East-facing 30×60 ft plan
- East-facing 40×40 ft plan
- East-facing 40×60 ft plan
- East-facing 50×80 ft plan
- North-facing 20×30 ft plan
- North-facing 20×40 ft plan
- North-facing 24×36 ft plan
- North-facing 25×40 ft plan
- North-facing 30×40 ft plan
- North-facing 30×50 ft plan
- North-facing 30×60 ft plan
- North-facing 40×40 ft plan
- North-facing 40×60 ft plan
- North-facing 50×80 ft plan
- West-facing 20×30 ft plan
- West-facing 20×40 ft plan
- West-facing 24×36 ft plan
- West-facing 25×40 ft plan
- West-facing 30×40 ft plan
- West-facing 30×50 ft plan
- West-facing 30×60 ft plan
- West-facing 40×40 ft plan
- West-facing 40×60 ft plan
- West-facing 50×80 ft plan
- South-facing 20×30 ft plan
- South-facing 20×40 ft plan
- South-facing 24×36 ft plan
- South-facing 25×40 ft plan
- South-facing 30×40 ft plan
- South-facing 30×50 ft plan
- South-facing 30×60 ft plan
- South-facing 40×40 ft plan
- South-facing 40×60 ft plan
- South-facing 50×80 ft plan
Try it on your own plot
The generator turns your exact plot size, road width and facing into a validated floor plan in about a minute, and the feasibility report adds construction cost, rental potential and a plot score — both free during the beta.