The Icebane estate, known as Frosthold, stands as a formidable bastion against the harsh elements and potential threats that plague Frosthaven. It is not a place of frivolous ornamentation or indulgent luxury, but rather a stronghold of practical design and defense. The architecture is primarily composed of thick, gray stone, quarried from the very mountains that surround the city. The walls are reinforced, and the structure itself is low and broad, designed to withstand the fierce blizzards and potential sieges that are common in this region. The estate's outer walls are punctuated by strategically placed arrow slits and watchtowers, a constant reminder of House Icebane's dedication to the city's security. The overall feeling is one of austere power, a reflection of the house's resolute nature.

Within the walls of Frosthold, the interior spaces continue the theme of practicality and resilience. The great hall, the heart of the estate, is a cavernous room with a high, vaulted ceiling. A massive hearth dominates one end, providing warmth and a focal point for gatherings. The furniture is sturdy and functional, crafted from dark, heavy wood. The walls are adorned with weapons, shields, and banners bearing the Icebane direwolf symbol, further emphasizing the house's martial traditions. Private chambers are sparsely furnished, prioritizing comfort and utility over opulence. Training yards and armories are given significant space within the estate, highlighting the importance of combat readiness. A network of underground passages and storage vaults also exists, ensuring the estate can withstand prolonged sieges. The grounds surrounding the main keep are kept clear, providing a defensive perimeter and space for training exercises. The general atmosphere inside of the estate is one of constant readiness.