Housing and Interior Design
This domain tests housing decisions, design fundamentals, and space planning - how families choose and finance housing and how interiors are planned for function, safety, and aesthetics.
Housing decisions
- Renting involves a lease, security deposit, tenant rights, and renters insurance; owning involves a down payment, mortgage, escrow, property taxes, and building equity. A common guideline caps housing cost near 30% of gross income.
- Zoning ordinances and building codes regulate use and safety; universal design supports aging in place with zero-step entries, wider doorways, lever handles, and reinforced wall blocking.
Design fundamentals
- Elements: line, form, space, texture, and color. Color has hue, value (lightness/darkness), and intensity (purity/saturation); warm colors advance, cool colors recede.
- Color schemes: monochromatic, analogous, complementary, split-complementary, triadic.
- Principles: balance (symmetrical, asymmetrical, radial), rhythm (repetition, gradation, transition, radiation), emphasis/focal point, proportion and scale, and unity/harmony.
Space planning and environment
- Respect traffic patterns and activity zones; use layered lighting (ambient, task, accent).
- R-value measures insulation resistance - higher is better. Consider indoor air quality, durability, and sustainable materials.
Worked example
A kitchen plan places the sink, range, and refrigerator so that each leg of the work triangle is 4–9 feet and the three legs total 12–26 feet. Reasoning: the triangle models the three most-visited work centers; legs that are too short crowd the cook, and legs that are too long add wasted steps, so the plan is checked against both limits before it is approved.
Traps that cost marks
- Confusing value (light/dark) with intensity (bright/dull).
- Mixing up proportion (relationship of parts within a whole) with scale (size relative to the room or human body).
- Reversing R-value - higher numbers mean more insulation, not less.
- Treating the work triangle as a fixed shape rather than a set of distance ranges.