'Dungeon Born' is also highly regarded. It details the birth and growth of a dungeon from the perspective of the dungeon itself. There are intricate details about how the dungeon evolves, attracts monsters, and deals with invaders. It's a really immersive read for those interested in dungeon building stories.
'Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita' also has some elements of dungeon building. The main character, who is a slime, starts to build and develop her own territory which has aspects similar to dungeon building. It has a unique take on the genre with its light - hearted and comical story - telling.
One great dungeon building web novel is 'Dungeon Defense'. It has an interesting concept where the main character builds and defends his dungeon against various threats. The story is filled with strategic battles and unique dungeon designs.
Power progression is a common theme. As the dungeon is built, the owner or the related characters gain more power. Another theme is resource management. Gathering resources to build and upgrade the dungeon is crucial in these novels. For example, in 'Dungeon Defense', the protagonist constantly has to think about how to get more resources for his dungeon.
'Azarinth Healer' also features some dungeon building aspects. The protagonist's journey through dungeons and her own development of a sort of 'dungeon - home' is really cool. It has great action scenes and the way the dungeons are described and built up over time is engaging. It's a web novel that keeps you hooked with its unique blend of elements.