Question 1

How much does an ADU cost to build in Simi Valley?

Accepted Answer

ADU costs in Simi Valley and Ventura County range from $60,000-$130,000 for a garage conversion, $110,000-$200,000 for an attached ADU, and $140,000-$280,000 for a detached new-build ADU. Use our free calculator for a personalized estimate.

Question 2

How long does it take to build an ADU in California?

Accepted Answer

Garage conversions typically take 3-5 months, while detached ADUs take 6-10 months including permitting. California streamlined ADU permitting, but Ventura County still requires plan check and inspections.

Question 3

How much rental income can an ADU generate in Ventura County?

Accepted Answer

A well-built ADU in Ventura County can generate $1,500-$3,000/month in rental income depending on size, location, and finish level. Studio ADUs average $1,500-$2,000/month, while 2-bedroom units can command $2,500-$3,000/month.

How Much Does an ADU Cost to Build in Simi Valley?