Hanok's unique design is defined by several distinctive elements, each serving a practical or symbolic purpose:

Roofs with Curved Tiles (Giwa) and Elegant Overhanging Eaves
Giwa (기와) — Curved Roof Tiles: The most recognizable feature, these reddish-brown clay tiles have a gentle curve that mimics the shape of a bird's wings. They're not just decorative—their shape helps channel rainwater away from the house, and the clay provides insulation against heat and cold.
Ondol — Traditional Underfloor Heating
Ondol (온돌) — Heated Floors: A revolutionary heating system invented in South Korea over 2,000 years ago. Ondol works by circulating hot air from a wood-burning stove (agungi) under the stone floors of the house, keeping the space warm in winter. Today, modern hanoks often use electric ondol for convenience, but the cozy warmth remains the same.
Maru or Daecheong — Wooden Floor Verandas for Summer Cooling
Daecheongmaru (대청마루) – Wooden Veranda: A long, open veranda that runs along the front of the house. It's a multi-purpose space used for dining, relaxing, or hosting guests, and it blurs the line between indoor and outdoor living. In summer, families often sleep here to enjoy the cool night breeze.
Anbang & Sarangbang: Inner-Chamber and Guest-Room Layout of a Hanok
Anbang (안방) & Sarangbang (사랑방) — Inner & Guest Rooms: The anbang is the master bedroom, typically used by the head of the household, and features a traditional yo (wooden wardrobe) and bedding (foldable mats stored during the day). The sarangbang is the guest room, designed to be more formal and often decorated with calligraphy or paintings.
Hanji: South Korea's Art of Paper Windows & Doors
Hanji (한지) — Korean Paper: Used for windows and doors, hanji is made from mulberry bark and is both durable and breathable. It diffuses sunlight softly into the house, creating a warm, gentle glow, and can be repaired easily if damaged.