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Balcony dimensions

Standard residential balcony dimensions, by use case.

2 min readUpdated 2026-06-10

Standard balcony sizes are determined by intended use — Juliet, sitting, dining, outdoor-room. Local code typically requires railings at 36-42 inches high; structural requirements limit projection.

In this guide

  1. 1

    Depths by use

    Juliet (decorative, no standing): 12-18 inches. Sitting (2 chairs): 36-60 inches. Dining (small table): 60-96 inches. Outdoor room (multiple zones): 72-144 inches.

  2. 2

    Widths

    Minimum (single-room access): 48 inches (matches a French door pair). Standard bedroom balcony: 60-84 inches. Master suite balcony: 96-144 inches. Full wall balcony: 144-240 inches.

  3. 3

    Railings

    Height: 36-42 inches. Baluster spacing: max 4 inches between balusters.

  4. 4

    Structural projection limits

    Cantilevered: up to ~6 feet projection without supplemental columns. Column-supported: up to 12 feet+ with proper structure.

Frequently asked questions

What's the standard balcony depth?

36-72 inches. 36 fits two chairs; 60+ fits a small table.

How tall does a balcony railing need to be?

36 inches minimum residential single-family (42 for multi-family). Check local code.

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