San Diego: strong rent, and a tax line that depends on the tract

Property types that carry the file

• Single-family rentals with an existing or buildable ADU
• Duplexes and triplexes in City Heights and North Park
• Condominiums with HOA dues near the bay and the beaches
• Small multifamily in Chula Vista and El Cajon

Where the rental demand comes from

This is not a market forecast. It is the set of anchors that decide whether a unit re-leases quickly and at what rent — the part of the file that does not move when financing costs do.

• Defense and ship-repair employment, which is cyclical in contract terms but anchored in place.
• Biotech and research clusters around Torrey Pines and Sorrento Mesa.
• Two large universities and a community college district that generate a permanent rental belt.
• A cross-border economy and a tourism sector that supports short-term and furnished rentals near the coast.
• A persistent gap between what a household earns and what a house costs, which keeps rental demand structurally high.

The rent

San Diego rewards rent-per-unit discipline: a fourplex in City Heights can show better coverage than a beach-area condominium at the same price because the HOA dues disappear and the rent per square foot is comparable. ADU income is real, but lenders vary on whether they will count it — and an unpermitted unit generally will not count at all.

The county tax line

The county assessor reassesses at a change of ownership, and Prop 13 limits growth afterward. The line that catches investors is Mello-Roos: community facilities districts in newer master-planned areas add a special tax that appears on the same bill and can be substantial. Budget review for a condominium project also matters, because special assessments land in the same place.

Insurance

Coastal salt air and older plumbing drive claims in the beach communities; the wildland interface in East County and the back country drives non-renewals. A standard policy may be replaced by a FAIR Plan dwelling policy plus a difference-in-conditions wrap, which changes the premium materially. Confirm the actual quote for the parcel, not a county average.

Short-term rentals and local rules

The city licenses short-term rentals under a tiered ordinance that distinguishes hosted from whole-home rentals and caps whole-home licenses citywide. Coastal areas add California Coastal Commission considerations, and Encinitas, Oceanside and Coronado each run their own rules. Underwriting nightly income in San Diego without a license in hand is a bad bet — confirm the license, the tier and the HOA’s own restrictions.

Not legal advice. Local ordinances change, and each city enforces its own rules. Confirm the current requirements with the city, the county and the HOA before you rely on rental income of any kind.

What we watch on a file here

• Get the full tax bill, not the base levy — Mello-Roos and assessments are what move the ratio.
• For ADU income, confirm the unit is permitted and ask the lender in writing whether it will count.
• On condominiums, check HOA budget reserves and any litigation; both affect whether a lender will take the project.
• Run insurance as a line item with a real quote, especially east of Interstate 15.
• For coastal short-term rentals, treat the license as a condition of the file, not an afterthought.