The top five interior design pillars to protect home value are clear furniture flow, layered lighting, fresh and ventilated bathrooms, curated personality, and ruthless decluttering. Clear furniture flow improves circulation, layered lighting enhances mood with warm dimmable bulbs, fresh bathrooms reduce buyer concerns over moisture, curated personal touches add uniqueness without clutter, and decluttering opens space visually. Focusing on these pillars creates inviting, well-maintained homes that command higher resale prices and attract more buyers quickly when applied thoughtfully.