Grow a tiny village into a bustling metropolis. Your city grows even while you're away!
Your city kept growing while you were away.
Idle City Builder is a free browser-based incremental game where you grow a small village into a thriving metropolis. Build homes to attract residents, open shops for income, construct factories for resources, and add services to keep your citizens happy. Your city continues to grow even when you close the tab — come back later to collect your earnings!
Start with a small plot and a single house. As population grows, unlock new building types and tiers. Balance residential, commercial, and industrial zones to maximize income. Keep satisfaction high with parks, schools, and hospitals. Upgrade infrastructure to unlock advanced buildings. When you're ready, use the City Charter Renewal (prestige) to reset with permanent bonuses and build an even greater city.
Yes! Your city continues generating income and growing population for up to 12 hours while you're away. When you return, you'll collect all the earnings you missed.
Start by building houses to grow your population, then add shops to generate income from your residents. Balance residential and commercial buildings for optimal growth.
City rating is determined by your service coverage (schools, hospitals, fire stations), pollution levels from industrial buildings, and park coverage. A higher rating means faster population growth and more income.
Last updated: April 2026