The single most common ADU mistake is designing the unit first and asking what it rents for second. Rent determines the budget, not the other way around.
Realistic monthly rent ranges
In practical dollars across our service area, junior units and studios generally land between $1,300 and $1,700. One-bedroom units commonly reach $1,650 to $2,000. Two-bedroom detached units regularly clear $2,000 and can exceed $2,400 in stronger submarkets.
What pushes a unit to the top of its range
- A separate entrance and real privacy. Tenants pay a premium not to walk past the main house's patio.
- Off-street parking. Even one dedicated space measurably raises achievable rent.
- In-unit laundry. Often the single highest-ROI upgrade in a small unit.
- Separate utility metering. Cleaner for both parties and easier to lease.
- Full-size appliances. Apartment-sized ranges and refrigerators read as "temporary" to renters.
Underwrite it like an investor
Take gross annual rent, subtract 5% vacancy, 8% maintenance and reserves, insurance, any incremental property tax on the added improvement, and management. What remains is your real net operating income. Divide that by all-in construction cost and you have your return on cost — the only number that matters when deciding whether to build.
Get the rent number before you get the plans
Because Bright Path manages rentals across Southern California, we can price your future ADU against real leased comparables, not portal estimates. Then we build to that number.
