Is building a rental ADU a good investment?

It can be, because you avoid a second land purchase. A one-bedroom ADU renting for $2,100–$2,800/month against an estimated $1,461/month loan payment can cover its own financing over time while adding roughly 10–15% to property value. Actual returns depend on your city, costs, and market.

Can I rent out an ADU in California?

Yes. State law permits renting an ADU on most single-family lots. Local rules may limit short-term rentals, so long-term leasing is the most reliable path. KĒĒP confirms what your city allows in the feasibility report.

How much does a rental ADU cost to build?

KĒĒP ADUs start at $190,000 all-in for a studio, $260,000 for a one-to-two bedroom, and $350,000 for a two-bedroom-plus. Your fixed all-in number is confirmed after a free feasibility and site assessment.

Does a rental ADU increase my property taxes?

The ADU is assessed as new construction and added to your assessed value, but the existing home is not reassessed. Rental income is taxable. Consult a tax professional for your situation.

A backyard rental ADU with a private entrance, built to generate monthly income on an existing lot

For property owners

Your backyard is the investment you already own.

The short answer

A KĒĒP rental ADU starts at $190,000 all-in and takes 7–10 months to build. Southern California one-bedroom ADUs rent for roughly $2,100–$2,800 per month, against an estimated $1,461/month loan payment. Because the land is already owned, the build turns unused backyard space into monthly income and long-term property value.

$2,100–$2,800

Typical SoCal 1BR ADU monthly rent (placeholder — verify before launch)

Most homeowners are sitting on an underused asset: the backyard. It costs money to own and earns nothing, while rents across Southern California stay among the highest in the country.

Buying a separate rental property means a second purchase, a second loan, and a second down payment — a barrier most families can't clear.

You already own the land. A KĒĒP ADU turns that backyard into a permitted rental that generates monthly income and adds to your property's value at the same time.

One-bedroom ADUs in the region rent for roughly $2,100 to $2,800 a month, against an estimated $1,461 loan payment. The unit can pay for itself over time while the asset appreciates on land you already hold.

Designed for it

Built to rent, built to last

✦Private entrance separate from the main house
✦Full kitchen, bathroom, and in-unit laundry
✦Durable, low-maintenance finishes
✦Separately metered utility options
✦Designed for strong rental appeal in your city

An unused backyard versus a working asset

	Backyard as-is	KĒĒP rental ADU
Monthly income	$0	$2,100–$2,800 typical 1BR rent
Monthly cost	Property carrying costs	~$1,461/mo est. loan payment
Effect on property value	None	Typically +10–15%
Second purchase required	Yes, to invest	No — you already own the land

Illustrative scenario — not a client testimonial

“We had a big, empty backyard and a mortgage. Now there's a one-bedroom unit back there renting for $2,600 a month. It covers the loan payment and then some, and the property is worth more.”

Illustrative scenario — a homeowner on the Westside

Where your money goes

Run it for your situation.

You're already paying every month. The question is what it's building.

What are you paying now?

How much per month?$2,400

$1,500$5,000

City

Unit type

Your $2,400/month could become a ~$1,461/month loan payment — less than you pay now — while building an asset you own.

	Keep paying rent	Build a KĒĒP ADU
Monthly payment	$2,400	~$1,461
Monthly difference	—	$939 less per month
After 10 years	$288,000 spent, nothing owned	Loan paid down + ~$22,800 equity gained
What you own at the end	Nothing	An appreciating asset on your own land

Equity gained is the increase in your property's value — typically less than the full build cost. Loan payment assumes financing the full build cost at an estimated 8.5% rate over 30 years — verify with a lender.

Want these numbers run for your actual property and situation? Free feasibility in 48 hours — no cost, no obligation.

Check my property

This is an illustration of how your current monthly payment compares to an ADU loan payment — not financial advice or a guarantee of returns. Loan payment assumes financing the full build cost at an estimated rate; your actual rate, terms, and equity depend on your lender, your property, and market conditions. Consult a lender and tax professional. KĒĒP's fixed price is confirmed in writing after a free feasibility and site assessment.

Common questions

Typical monthly rental income ranges from roughly $1,800 to $3,400 depending on city and unit size, with most one-bedroom units renting between $2,100 and $2,800 per month. These figures are placeholders pending validation with local rent data.