---
title: "Common Areas at the Heart (129)"
created: 2026-07-01
updated: 2026-07-01
type: concept
status: compiled
namespace: pattern-language
pattern_number: 129
pattern_name: "Common Areas at the Heart"
source_repository: https://github.com/zenodotus280/apl-md
source_url: https://github.com/zenodotus280/apl-md/blob/master/Patterns/Common%20Areas%20at%20the%20Heart%20%28129%29.md
license_note: Non-commercial reuse with attribution; see namespace README and source LICENSE.md.
related_patterns:
  - "Intimacy Gradient (127)"
  - "Indoor Sunlight (128)"
  - "Cascade of Roofs (116)"
  - "Farmhouse Kitchen (139)"
  - "Communal Eating (147)"
  - "The Fire (181)"
  - "Light on Two Sides of Every Room (159)"
  - "The Shape of Indoor Space (191)"
  - "Sequence of Sitting Spaces (142)"
  - "Outdoor Room (163)"
  - "Arcades (119)"
  - "The Flow Through Rooms (131)"
  - "Short Passages (132)"
---

# Common Areas at the Heart (129)

> Source pattern from the abridged `apl-md` corpus. Use as a design reference and constraint seed; do not treat as commercial-clean training data.

### Problem
>No social group—whether a family, a work group, or a school group—can survive without constant informal contact among its members.

### Solution
>Create a single common area for every social group. Locate it at the center of gravity of all the spaces the group occupied, and in such a way that the paths which go in and out of the building lie tangent to it.

### Related Patterns
... along the [[Intimacy Gradient (127)]], in every building and in every social group within the building, it is necessary to place the common areas. Place them on the sunlit side to reinforce the pattern of [[Indoor Sunlight (128)]]; and, when they are large, give them the higher roofs of the [[Cascade of Roofs (116)]].

Most basic of all to common areas are food and fire. Include [[Farmhouse Kitchen (139)]], [[Communal Eating (147)]], and [[The Fire (181)]]. For the shape of the common area in fine detail, see [[Light on Two Sides of Every Room (159)]] and [[The Shape of Indoor Space (191)]]. Make sure that there are plenty of different sitting places, different in character for different kinds of moments - [[Sequence of Sitting Spaces (142)]]. Include an [[Outdoor Room (163)]]. And make the paths properly tangent to the common areas - [[Arcades (119)]], [[The Flow Through Rooms (131)]], [[Short Passages (132)]] ...

---

> [!cite]- Alexander, Christopher. _A Pattern Language: Towns, Buildings, Construction_. Oxford University Press, 1977, p. 618.
> #APL/confidence/high
>
> #APL/Building-Patterns/Light-and-Space