Housing, Interiors, and Environmental Design
Housing, Interiors, and Environmental Design tests design elements and principles, space planning, housing affordability, and sustainable choices. Items often ask you to diagnose a design problem and justify a solution.
Design fundamentals
- Elements: line, form, space, texture, color.
- Principles: balance (symmetrical, asymmetrical, radial), rhythm (repetition, progression, transition), emphasis, proportion/scale, and unity.
- Color schemes: monochromatic (one hue), analogous (neighbors), complementary (opposites), triadic (three evenly spaced hues).
- Universal design supports users of all ages and abilities: zero-step entries, wider doorways, lever handles, curbless showers, and good lighting.
Housing and sustainability
Housing choices balance cost, location, size, and life stage. Mortgage affordability often targets housing costs at or below 30% of gross income; PITI includes principal, interest, taxes, and insurance. Sustainable design uses site orientation, insulation, efficient appliances, water-saving fixtures, durable materials, and low-VOC finishes.
Worked example
A 12-foot living-room wall has an 8-foot ceiling. A 9-foot sofa would dominate the wall and crowd traffic. A 7-foot sofa with two smaller chairs creates better scale and proportion, preserves a walkway, and balances visual weight. The principle is scale relative to the room, not simply “buy the biggest sofa.”
Traps
- Confusing proportion (relationship of parts) with scale (size relative to the whole or human use).
- Labeling only symmetrical balance as “good.”
- Forgetting taxes and insurance in affordability.
- Treating universal design as only for wheelchair users.