An ADU only works as an investment if it rents. And rent is extremely local.
Here are the 2026 numbers for the submarkets we build in.
How to read these ranges
Every number below is for a newly-completed, permitted ADU with in-unit laundry, modest upgrades (LVP floors, quartz counters, standard appliances), and private exterior access. Premium finishes add 8–15%. Shared-entry configurations subtract 10–20%.
All rents are monthly, and assume a 12-month lease.
City of San Diego
North Park — 1 BR $2,600–$3,100 · 2 BR $3,200–$3,900 - Why: Walkability, alley access, Millennial renter demand. Some of the strongest per-sqft rents in the county.
South Park / Golden Hill — 1 BR $2,500–$3,000 · 2 BR $3,100–$3,700
University Heights / Hillcrest — 1 BR $2,450–$2,950 · 2 BR $3,000–$3,600
Point Loma / Ocean Beach — 1 BR $2,700–$3,300 · 2 BR $3,400–$4,200
Clairemont — 1 BR $2,200–$2,650 · 2 BR $2,800–$3,300
Pacific Beach / La Jolla — 1 BR $2,900–$3,600 · 2 BR $3,700–$4,800 (strong coastal premium)
North County Coastal
Encinitas — 1 BR $3,000–$3,800 · 2 BR $3,800–$4,800 - Why: Strict supply constraints. Strong professional renter base. Encinitas ADU rents clear faster than almost any submarket.
Carlsbad — 1 BR $2,800–$3,400 · 2 BR $3,500–$4,300
Oceanside — 1 BR $2,300–$2,800 · 2 BR $2,900–$3,500
North County Inland
Escondido — 1 BR $1,950–$2,400 · 2 BR $2,500–$3,000
San Marcos — 1 BR $2,100–$2,600 · 2 BR $2,700–$3,250
Vista — 1 BR $2,050–$2,500 · 2 BR $2,600–$3,100
East County
La Mesa — 1 BR $2,300–$2,800 · 2 BR $2,900–$3,400
El Cajon — 1 BR $2,100–$2,550 · 2 BR $2,650–$3,150
Santee — 1 BR $2,150–$2,600 · 2 BR $2,700–$3,200
South Bay
Chula Vista — 1 BR $2,200–$2,700 · 2 BR $2,750–$3,350
National City — 1 BR $2,000–$2,450 · 2 BR $2,500–$3,000
Coronado — 1 BR $3,200–$4,000 · 2 BR $4,000–$5,200 (very limited supply; rents can exceed this)
The ROI math
For a $400K all-in 2 BR detached ADU, here's how the cap rate looks at three rent levels:
- $3,000/mo — $36K gross / $400K = 9.0% gross cap rate → ~6.8% net after expenses
- $3,500/mo — $42K gross / $400K = 10.5% gross → ~8.0% net
- $4,200/mo — $50.4K gross / $400K = 12.6% gross → ~9.5% net
For reference, most SD single-family rentals cap at 3.5–5% net today. ADUs are structurally better cash-flow assets because you're not paying for the land.
Where the ROI actually pencils
Purely on cap rate, the strongest net-return ADU neighborhoods in 2026 are:
1. Chula Vista (low build cost + solid rent) 2. Escondido (lowest build cost in the county) 3. La Mesa (moderate cost, strong rent for East County) 4. North Park (high cost but very high rent) 5. El Cajon (overlooked value)
Coastal submarkets (Encinitas, Carlsbad, PB) produce strong rents but higher build costs, so the cap rate is often similar to inland markets — the win is on resale, not cash flow.
Get your lot-specific number
These are ranges. Your actual ADU will have a specific projected rent based on its size, finish level, parking, entry privacy, and exact location. Our Property Potential Report gives you the real number.
[Request your free report →](/contact)
