ADU Permits · Mission Viejo
Can you build an ADU in Mission Viejo?
Before you spend money on plans, find out what your Mission Viejo property actually allows. Our free Permit Requirement Report reviews your lot, the city's rules, and your ADU options — so you know what's possible from the start.
What your free Permit Requirement Report tells you
- Whether your Mission Viejo lot qualifies for a detached or attached ADU
- How much square footage you may be able to add
- Setbacks, lot coverage, and parking rules that apply to your property
- Mission Viejo's permit process and likely timeline
- Which engineering reports your project will require
- The fastest, lowest-cost path to an approved permit
Permits start with drawings. This report shows what is possible first, so you don't pay for plans that can't get approved. Like what you see? Our engineers and designers handle your drawings and manage the permit for you.
We know your city
35 years working with Orange County cities means we know their rules and how to get approved.
Faster approvals
Knowing what each city requires up front means fewer revisions and a faster permit.
Lower cost
We design it, engineer it, and pull the permit in-house, so you avoid surprise fees and delays.
Common questions
How big of an ADU can I build in Mission Viejo?
It depends on your lot size, existing structures, and setbacks. State law allows ADUs up to certain limits, but your specific property may allow more or less. Your free report gives you a realistic range for your address.
Do I need plans before I can apply for a permit?
Yes. Every permit starts with drawings. That's why we run the Permit Requirement Report first — so you only invest in plans once you know your project can be approved.
Can you also design and build it?
Yes. With 35 years in Orange County, we handle the design, every type of engineering, the permit, and construction — so you get your ADU faster and for less.
Find out what you can build — for free.
Enter your address and get your Permit Requirement Report before you spend a dollar on plans.