Building ADUs Across California
We specialize in ADU projects throughout California, providing tailored solutions for your unique property and needs.
Get in Touch
Navigating the ADU cost in California can be overwhelming without a trusted guide. That's where we come in. We’ve worked in cities large and small from Southern to Northern California, and we know the local permitting rules, construction quirks, and cost variables that affect your project.
Cost of ADU in California and Tips for Homeowners
Understanding the ADU pricing breakdown California is key to planning your project. Every property is different, but here are five key trends to help guide your expectations:
- Detached ADUs tend to cost the most - usually anywhere from $180,000 to $400,000 - depending on how big they are and the type of finishes you choose.
- Garage conversions offer great value, usually costing between $90,000 and $150,000 - especially if your existing garage is in good shape.
- Attached ADUs fall somewhere in the middle, with prices around $140,000 to $280,000.
- Modular ADUs are gaining popularity, with costs from $100,000 to $250,000 - faster timelines, but site prep and utility hookups still apply.
- Permitting, site work, and utility upgrades can add $20,000–$50,000 in hidden costs of building an ADU.
Explore ADU Cost California and Build Smart
Ready to maximize your California property? Whether you're considering a small home ADU, a tiny home, or a fully detached unit, we're here to help - anywhere in the Golden State.
More information
While California has made strides in easing ADU laws statewide, local permitting can still be tricky. Each city and county has its own set of rules - from parking exemptions to height restrictions - and that’s where we shine. At ADU Scale, we understand the ins and outs of your local ADU permit cost California and approval timelines.
See more
In many cities, permits alone can range from $5,000 to $20,000, depending on the ADU type, location, and scope. That’s why having a partner with local experience matters.
What Else Impacts the Cost to Build an ADU in California?
To help you manage your budget, here’s a helpful list based on our ADU cost planning checklist:
- Site preparation (grading, demolition, tree removal)
- Utility upgrades (water, sewer, electricity)
- Permit and impact fees
- Architectural and engineering plans
- Builder and contractor labor
- These are often hidden costs of ADU in California that aren’t clear at the start. We make sure you're informed every step of the way.
How to Finance the Average Cost of ADU in California
Worried about funding your ADU? You're not alone. We guide homeowners through multiple ADU financing options in California, including home equity loans, renovation loans, and even city-based grant programs where available.
Whether you're wondering about the cost to build an ADU in California or looking for ways to make your investment stretch further, we’ve got your back.
Let’s find out if your lot is eligible for an ADU in California.
Whether you're wondering about the cost to build an ADU in California or looking for ways to make your investment stretch further, we’ve got your back.
Let’s find out if your lot is eligible for an ADU in California.