Costs & budgets
How much does an ADU cost in Monrovia?
Monrovia ADUs cost $85K–$165K for a garage conversion and $230K–$420K for a detached new build in 2026 — typical of the Los Angeles market. Lot conditions, utility upgrades, and finish tier are the biggest swing factors.
Monrovia construction labor and permit fees track the broader Los Angeles market within ±10%. Hillside parcels, historic overlays, and corner lots can each add 8–15% to the base number.
Two-thirds of Monrovia ADU budgets land within ±15% of the midpoint when scope is locked early. Most cost surprises come from late selection changes or undiscovered site conditions.
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Related questions
- • How long does it take to build an ADU in Monrovia?
- • Do I need a permit for an ADU in Monrovia?
- • What's the cheapest ADU type in Monrovia?
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