Skip to main content
Almost an Architect
Current page: Peña, Problem Seeking — Ch 3 — Recurring Concept: Expansibility
PatternRecommended

Concept: expansibility — designing for anticipated growth

Peña, Problem Seeking — Ch 3 — Recurring Concept: Expansibility

Description

Expansibility prepares the home for additions — a future garage bay, a future bonus room over the garage, a future detached studio. Even without commitment to build the addition, the present design can preserve the option (orient the garage to allow a third bay, leave an interior wall reusable as an exterior wall, route plumbing past the future addition site).

Why this exists

Almost every homeowner imagines a future addition. Most never plan for it. Programming expansibility costs little; it usually saves a wall of structural engineering on day one.

Categories

AdjacencySite

Source

Caudill Rowlett Scott (via ERIC, US Dept of Education)authoritative
Problem Seeking: New Directions in Architectural Programming (early edition (ERIC ED037930, 1969))
Upgrade path: $75 for Problem Seeking 5th Edition (Wiley). 5th edition (2012, Wiley) is the current authoritative form of Peña's method. The ERIC PDF is the earliest published form — all the core method is present; later editions add case studies and refinements.
Section: Ch 3 — Recurring Concept: Expansibility
Published 1969-01-01 · last verified 2026-05-14

Solver enforcement

Browsable only — the solver does not currently enforce this directive (no spec-level data to check against). This entry exists so the architect personas can cite it in conversation and the user can read what the rule says.

Related directives

Last reviewed 2026-05-14.