Window Regulations and StandardsVolume 1 · Issue 1 · June 2026
The Rules Behind Every Window
Behind every legal window in India sits a stack of codes — the NBC, a clutch of IS standards, fire and escape rules, accessibility law and energy envelope codes. This is the 6-guide compliance reference: what each code requires, in plain language — with the honest reminder that your local building bye-law adopts and amends these, so always verify it.
Residential Window Standards in India
The umbrella map of every standard that governs a residential window in India — NBC 2016, the IS frame and glass codes, the Eco-Niwas Samhita envelope code, fire and egress, and accessibility law — with a which-standard-governs-what table routing to each spoke.
Read itLight, ventilation and energy codes
NBC and the envelope codes
NBC 201602National Building Code Window Requirements
The NBC 2016 window code for Indian homes: about 10 per cent glazed area for light, openable area for ventilation, bathroom windows of at least 0.37 sq m, and ceiling heights of 2.75 m or 2.4 m, with the honest caveat that the local bye-law governs.
Green codes03Green Building Window Standards in India
ENS 2018 and ECBC 2017 are India's mandatory building envelope codes. Learn the window thresholds they impose — RETV under 15 W/m2, the WWR-linked VLT ladder, U-value — the compliance documents a builder must file, and how this differs from voluntary green ratings.
Fire, escape and accessibility
Life safety and barrier-free law
Fire safety04Fire Safety and Windows
How the National Building Code 2016 Part 4 treats windows in a fire: fire-rated glazing and its E and EI ratings, spandrels that stop fire between floors, smoke venting, and why every room needs one openable quick-release grille.
Egress05Emergency Escape Window Requirements in India
The escape window every bedroom and basement needs: clear openable opening size, low sill height, and the quick-release grille rule that stops a fixed welded grille turning a bedroom into a fire trap. Verify your local bye-law and fire NOC.
Accessibility06Accessibility Standards for Windows in India
The compliance reference for accessible windows in India: how the RPwD Act 2016 and the 2021 Harmonised Guidelines mandate reachable controls, low sills for a seated view, lever hardware, contrast, and clear floor space, with a verify-the-bye-law caveat.