Rental Income · 2026
How Much Rent Can an ADU Earn in California? (2026)
A well-located ADU in California’s Monterey Bay and Silicon Valley typically rents for $2,000 to $3,500 a month in 2026, depending on size and bedroom count. A 660-square-foot one-bedroom, our most popular size, commonly rents in the $2,500 to $2,900 range here. After mortgage, property tax, insurance, and maintenance, many homeowners net $1,000 to $1,800 a month in real cash flow.
But monthly rent is only half the return. An ADU also tends to add roughly 115% of its cost to your property’s value, so you’re building equity at the same time you’re collecting rent.
The short version: Expect roughly $2,000 to $3,500/month in rent depending on size. After expenses, a typical ADU nets four figures a month, and adds significant equity on top. Run your own numbers in the ROI calculator.
Estimated monthly rent by size
| Size | Typical use | Estimated monthly rent* |
|---|---|---|
| 450 sq ft studio | Long-term tenant, in-law | ~$2,000 |
| 660 sq ft 1-bed | Couple, professional | $2,500 to $2,900 |
| 660 to 885 sq ft 2-bed | Small family, roommates | $2,900 to $3,300 |
| 945 to 1,200 sq ft 3-bed | Family rental | $3,300 to $3,800 |
*Ranges are regional estimates for the Monterey Bay / Silicon Valley; your actual rent depends on neighborhood, finish, and the rental market when you list. The calculator lets you plug in your own rent number.
What’s left after expenses
A useful rule of thumb: after vacancy, maintenance, property tax, and insurance, roughly 55% of gross rent becomes net operating income. On a 660-square-foot ADU renting at $2,800/month ($33,600/year), that’s around $18,000/year, or about $1,500/month, often enough to cover the loan payment with room to spare.
The equity you build at the same time
Rent is the visible return; equity is the quiet one. California ADUs typically add about 115% of their build cost to property value. On a $287,000 Six Sixty, that’s roughly $330,000 in added value, which compounds with normal appreciation over the years you hold the home. The calculator’s equity tab projects this out 5, 10, and 15 years.
What drives rent up
- Bedrooms over square footage. A 2-bedroom in the same footprint as a 1-bedroom rents for meaningfully more, which is why our 660 2-bedroom is our best rental play.
- A private entrance and real kitchen. Tenants pay for independence, which every Framework First home delivers as standard.
- Finish quality. Move-in-ready, well-finished units command top of the local range, and lease faster.
Is it worth it?
For most homeowners with the equity to build, yes. The rent often covers the financing, the equity gain is substantial, and you keep an asset that can later house family or be sold with the home. The honest caveat: returns depend on your local rental market and your financing terms, which is exactly what the ROI calculator is for, and what a feasibility study confirms for your specific property.
Frequently asked questions
Which ADU earns the most rent per dollar spent?
Two-bedroom layouts. A second bedroom raises rent meaningfully more than it raises build cost, which is why our 660 square foot two-bedroom is the favorite of income-focused owners.
Can I rent my ADU on Airbnb?
Often no; many California cities restrict ADU rentals to 30 days or longer. Long-term tenants are the durable strategy, and the math in this guide assumes them.
Will the rent cover my financing payment?
Often, yes, depending on your rate and local market. The ROI calculator shows payment, rent, and cash flow side by side, and the feasibility study confirms the numbers for your property.
Want a rental projection for your exact lot and model? See if your property qualifies and we’ll run the numbers with you.