ADU Pricing · 2026
Studio ADU Cost in California (2026)
A studio ADU cost in California starts at $199,000 with Framework First, and that starting price is built around a permitting budget, not a stripped-down base that permits and site work get added onto later. Our Four Fifty model is a 450 square foot studio with one full bathroom, and the $199,000 covers a permitting budget, plans, foundation, the factory-built home, crane delivery, utility hookups, appliances, and final inspection. Your exact permit costs and any property-specific site work get confirmed in the feasibility study, so you know the real number before you commit.
The short version: A finished studio ADU in California costs about $199,000 turnkey through Framework First (our Four Fifty model, 450 sq ft, 1 bath). That single number includes permits, foundation, build, delivery, hookups, appliances, and inspection. A studio is the right call when your priority is the lowest entry price, a tight lot, or a private space for one person.
What a studio ADU actually costs
When people search for a studio ADU cost, they usually get a confusing range because most builders quote a base “shell” price and then add permits, site work, utility connections, and appliances as line items later. We do it the opposite way: a permitting budget, plans, and appliances are built into the price from the start, with your exact permit costs and any property-specific site work confirmed up front in the feasibility study.
Our entry-level studio, the Four Fifty, is $199,000, permitting budget included. Here is how it sits next to the next few models, so you can see exactly what your money buys as you step up in size:
| Model | Size | Beds / Baths | Total price* | Build timeline |
|---|---|---|---|---|
| Four Fifty (studio) | 450 sq ft | 0 bed / 1 bath | $199,000 | ~4 months |
| The 405 | 405 sq ft | 1 bed / 1 bath | $239,000 | ~5 months |
| Five Five Five | 555 sq ft | 1 bed / 1 bath | $279,000 | ~5 months |
| Six Sixty | 660 sq ft | 1 bed / 1 bath | $309,000 | ~5 months |
*Includes a permitting budget, not final permit costs. Permits and property-specific site work (septic, retaining walls, etc.) vary by property and are confirmed in your feasibility study.
The Four Fifty is the most affordable home we build, and it is the best-value studio in our lineup. It is a bright, efficient open-plan space with a full kitchen and a full bathroom, designed so it never feels cramped despite the compact footprint. For a deeper look at the whole range, see our full breakdown of how much an ADU costs in California.
What “all-inclusive” includes
The $199,000 covers the parts other quotes hide:
- A permitting budget, plus plans drawn and submitted for you
- Foundation and the site connections it needs
- The home itself, built roughly 97% in our Salinas factory
- Crane delivery and set on your prepared site
- Utility hookups (water, sewer, electrical)
- Appliances installed and ready to use
- Final inspection and sign-off
The main thing a turnkey number cannot predict is your specific lot. Steep grades, long utility runs, or unusual access can add site-prep costs. We pin those down for free in the feasibility study, so there are no surprises after you commit.
When a studio ADU is the right choice
A studio is not “the cheap option you settle for.” For a lot of homeowners it is the smartest fit. Choose a studio when:
- Price is your first priority. At $199,000, the Four Fifty is the lowest-cost path to a fully permitted, finished home in your backyard.
- Your lot is tight. A 450 square foot footprint slides onto small or oddly shaped lots where a larger L-shaped home would not fit within setbacks.
- It is for one person. A studio is ideal for a single tenant, a parent aging in place, an adult child gaining independence, or a home office or guest suite.
- You want the fastest build. The Four Fifty delivers in about 4 months, the quickest in our lineup, because there is less square footage to build.
When to size up instead
If you want real rental income, a separated bedroom usually pays you back. A one-bedroom rents for noticeably more than a studio in most of our service area, and a two-bedroom rents for more still. If income is the goal, weigh the studio against a true one-bedroom like the Six Sixty or a two-bedroom layout. Our guide to how much rent an ADU can earn walks through the math.
For aging parents who want a real bedroom and door that closes, a one-bedroom is often worth the step up. We cover that decision in detail in our guide to building an ADU for aging parents.
Studio ADU rules in California (2026)
California state law makes studios easy to permit, and state rules preempt most local restrictions. The headlines that matter for a studio:
- Size: Cities must allow at least an 800 sq ft ADU, so a 450 sq ft studio is comfortably within bounds anywhere.
- Approval is ministerial. Your city must decide on a complete application within 60 days, with no discretionary hearing.
- No owner-occupancy requirement for a standard ADU. You do not have to live on the property. (Note: a JADU, a junior ADU built inside your existing home’s walls, still requires owner-occupancy.)
- Impact fees are waived for any ADU under 750 sq ft, and a 450 sq ft studio is well under that line.
- Parking: at most one space, with broad exemptions (within half a mile of transit, in a historic district, near car-share, and more).
A standard studio ADU is a true detached unit, which is different from a JADU carved out of your existing house. If you are weighing the two, our JADU vs ADU comparison lays out the trade-offs. For the full legal picture, see our guide to California ADU laws in 2026.
How homeowners pay for a studio ADU
Even at the lowest entry price in our lineup, most families do not pay $199,000 in cash. Common paths include a home equity line of credit (HELOC), a cash-out refinance, a renovation loan, or an ADU-specific construction loan. Because a studio is the smallest loan amount of any model, it is often the easiest to qualify for. We break down the options in our guide to financing an ADU in California, including how to finance one without a lot of cash on hand.
Frequently asked questions
How much does a studio ADU cost in California?
With Framework First, a studio ADU starts at $199,000, built around a permitting budget: our Four Fifty model, 450 square feet with one full bathroom. That price also covers plans, foundation, the factory build, crane delivery, utility hookups, appliances, and final inspection. Your exact permit costs and any property-specific site work are the variables, and we confirm both for free in the feasibility study.
How big is a studio ADU?
Our Four Fifty studio is 450 square feet, an open-plan layout with a full kitchen and full bathroom. California law lets a detached ADU run up to 1,200 sq ft, so a studio sits comfortably at the smaller, more affordable end of the range. For the full size picture, see how big an ADU can be in California.
Is a studio or a one-bedroom ADU a better value?
It depends on your goal. If you want the lowest price and fastest build, the studio wins at $199,000 in about 4 months. If you want stronger rental income or a real separated bedroom for a parent, a one-bedroom is usually worth the step up. A one-bedroom typically rents for more, which can close the price gap over time.
How long does it take to build a studio ADU?
About 4 months for our Four Fifty, the fastest in our lineup, because most of the home is built in our Salinas factory while your site is prepped in parallel. See how long it takes to build an ADU for the full timeline.
Will a studio ADU add value to my home?
Yes. A permitted, finished ADU adds livable square footage and can generate rental income, both of which support resale value. Our guide to ADU appraisal and resale value covers how appraisers treat them.
Ready to see your studio ADU number?
The fastest way to know what a studio ADU will cost on your exact lot is a feasibility study. Our team checks your zoning, setbacks, and utilities, then confirms whether the Four Fifty fits and what your total price, permitting budget included, would be, with your exact permit costs and any site-specific work confirmed at the same time.
Start your feasibility study and get real numbers for your property.
We are a family-owned ADU and home builder in Salinas, California (CSLB #1047146, MFG #1595931), building since 2021 and serving homeowners across the Monterey Bay region across Monterey, Santa Cruz, Santa Clara, San Benito, San Mateo, and San Luis Obispo counties.