Standard Door and Window Sizes for Homes: A Practical Guide
🇹🇷 This article describes regulations and processes specific to Turkey — requirements differ in other countries.
How wide should a room door be, and where does the window sill height start from? The missing piece in our dimension guide series (kitchen, room, staircase, ceiling): standard door and window sizes.
Door and window dimensions in a residential project are usually skipped over as "obviously standard" — but getting them wrong creates real problems, both when moving furniture and appliances in and in everyday comfort. The table below summarizes the ranges you'll run into most often in practice.
Door dimensions
| Door type | Common width | Height |
|---|---|---|
| Interior room door | 80–90 cm | 200–210 cm |
| Wet area door (bathroom/WC) | 70–80 cm | 200–210 cm |
| Apartment entrance door | 90–100 cm | 210 cm |
| Building main entrance door | 100–120 cm (can be double-leaf) | 210–220 cm |
| Wheelchair-accessible door | clear opening ≥ 90 cm | — |
Getting a washing machine, a king-size mattress, or a wheelchair through a room door narrower than 90 cm becomes difficult — and keeping wet area doors on the narrow side in particular can cause problems later when appliances need replacing.
Window dimensions and placement
Just as important as a window's width and height is how far above the floor it starts (the sill/parapet height), which varies by the room's function:
- Living room / bedroom: Sill height is usually 90–100 cm — high enough to view outside comfortably while seated or lying down, while still being a safe height against falls.
- Kitchen: Windows above the counter start right above countertop height (~90 cm), so they don't cut into the work surface.
- Bathroom: For privacy, sill height is usually kept at 150 cm or higher, or frosted/obscured glass is used instead.
The ratio of total window area to floor area is a separate topic — you can explore it, along with its own rule of thumb, in our Window / Facade Ratio Calculator.
What this doesn't cover
This table summarizes general practical ranges; fire escape stairwell doors, the full requirements of accessibility regulations, and thermal insulation / glazing type selection are project-specific technical requirements handled separately.
