Games like Buildia
Games like Buildia include Planet Coaster, Townscaper, PowerWash Simulator, House Flipper, and Totally Accurate Battle Simulator. We matched them by the tags players give Buildia on Steam (Simulation, Casual, Sandbox, 3D, and Colorful): closest matches first, and among equally close ones the better-known games.

Planet Coaster
Shared: Simulation · Sandbox · Family Friendly

Townscaper
Shared: Sandbox · Casual · Simulation

PowerWash Simulator
Shared: Casual · Simulation · 3D

House Flipper
Shared: Simulation · Sandbox · Casual

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Colorful

PC Building Simulator
Shared: Simulation · Sandbox · 3D

Garry's Mod
Shared: Sandbox · Casual · Simulation

SUMMERHOUSE
Shared: Sandbox · Casual · Colorful

Planet Coaster 2
Shared: Simulation · Sandbox · 3D

My Dream Setup
Shared: Simulation · Sandbox · Casual

Equilinox
Shared: Simulation · Casual · Sandbox

Wobbledogs
Shared: Simulation · Sandbox · Colorful

Banana
Shared: Casual · Simulation · Family Friendly

Cities: Skylines
Shared: Simulation · Sandbox · Building

Slime Rancher 2
Shared: Colorful · Simulation · Casual

Poly Bridge
Shared: Simulation · Sandbox · Building

The Sims™ 3
Shared: Simulation · Sandbox · Casual

Ballads of Hongye: REBORN
Shared: Casual · Simulation · Atmospheric

The Sims™ 4
Shared: Simulation · Sandbox · Casual

PowerWash Simulator 2
Shared: Casual · Simulation · Sandbox

Slime Rancher
Shared: Colorful · Simulation · Sandbox

Hozy
Shared: Casual · Sandbox · Simulation

A Game About Digging A Hole
Shared: Sandbox · Simulation · Voxel

SpaceEngine
Shared: Casual · Sandbox · 3D