Housing, Interiors, and Environmental Design
Housing, Interiors, and Environmental Design examines housing decisions, space planning, universal design, sustainability, and interior aesthetics. Exam items often ask you to evaluate whether a plan meets safety, accessibility, and function.
Housing and regulation
Housing affordability is commonly defined as shelter costs at or below 30% of gross household income. Zoning regulates land use; building codes set construction and safety minimums; fair housing law prohibits discrimination in sale or rental. Universal design creates spaces usable by the widest range of people without adaptation, while ADA standards set legal accessibility requirements for covered facilities.
Planning and environment
- The kitchen work triangle links sink, refrigerator, and range. A common NKBA guideline is 4-9 feet per leg and 13-26 feet for the sum.
- Circulation needs clear paths; furniture should not block egress.
- R-value measures thermal resistance; higher R-value means better insulation.
- Ventilation controls moisture, odors, and indoor pollutants. Radon, mold, and volatile organic compounds are indoor air quality concerns.
- Lighting layers include ambient, task, and accent lighting.
Design principles
Balance can be symmetrical, asymmetrical, or radial. Rhythm uses repetition, gradation, transition, or radiation. Proportion concerns size relationships; scale concerns size relative to the setting.
Worked example
A kitchen has sink-to-refrigerator 10 feet, sink-to-range 5 feet, and range-to-refrigerator 12 feet. The sum is 27 feet. Under the common NKBA guideline, each leg should be 4-9 feet and the total 13-26 feet. This triangle fails both checks: the 12-foot leg is too long and the 27-foot sum exceeds the range. The reasoning is to test each leg and the total, not just the visual shape.
Traps
Universal design is not only for disability; it benefits children, older adults, and injured users. Higher R-value is better insulation, not higher cost. Fair housing law has limited exemptions but broad coverage. A beautiful plan can still fail circulation or reach-range requirements.