Low-cost housing layout — typical specification for one-room quarters For standard one-room residential quarters adopted in many public-works schemes, which of the following specifications are commonly used?

Introduction / Context:
Public housing and institutional accommodation often follow standardized layouts to control cost and ensure functional usability. One-room units (single-room tenements) are specified with typical dimensions and arrangements that balance daylight, ventilation, and economy.

Given Data / Assumptions:

• Basic one-room dwelling with a front verandah.
• Block planning favors repetition (row of quarters) for services and access.
• Dimensions stated are typical, not absolute code minima.

Concept / Approach:

Standard sizes streamline material usage and maintain livability. Verandahs provide shaded transition space and improve cross-ventilation. Repetition in a row optimizes plumbing, electrical routing, and site utilization while keeping circulation simple.

Step-by-Step Solution:

Verification / Alternative check:

Departmental schedule-of-accommodation booklets often publish similar module sizes for low-cost housing and labour quarters.

Why Other Options Are Wrong:

• Each of (a)–(c) is correct; hence the comprehensive answer is (d) “All the above”.

Common Pitfalls:

• Ignoring local bylaws for setbacks and minimum room sizes/height.
• Overlooking accessibility and service shaft planning in repetitive blocks.

Final Answer:

All the above.