The cap-rate model, honestly built
Work the equation in this order: (1) market rent for the ADU size from actual neighborhood comps; (2) effective income at a realistic vacancy haircut; (3) operating costs (insurance delta, maintenance, any utility splits); (4) divide by total project cost — acquisition share plus verified build budget. The discipline that separates investors from hopefuls: bids before close (not after), rents from comps (not calculators), and the panel/sewer/setback screen before falling for any listing. Run scenarios with the ADU ROI calculator.
The lot screen
- Size/access: 6,500+ sq ft, or smaller with alley access — separate entrances rent better and appraise cleaner.
- Placement: existing structures positioned so a detached unit fits without demolition gymnastics.
- Systems: panel capacity and sewer-lateral condition — the two silent budget-killers.
- Rules: state law allows an ADU + JADU on most SFR lots ministerially; verify current LADBS specifics, and remember pre-approved standard plans cut timeline.
The corridor map
| Market | Median price | Days on market | County | School district(s) |
|---|---|---|---|---|
| Pacoima | $700,000 | 52 | Los Angeles | Los Angeles Unified School District (LAUSD) |
| Arleta | $759,000 | — | Los Angeles | Los Angeles Unified School District (LAUSD) |
| Van Nuys | $800,000 | 40 | Los Angeles | Los Angeles Unified School District (LAUSD) |
| Reseda | $800,000 | 38 | Los Angeles | Los Angeles Unified School District (LAUSD) |
| Canoga Park | $725,000 | 35 | Los Angeles | Los Angeles Unified School District (LAUSD) |
Figures from /data.json, the site’s canonical data file (June 2026). Always verify current numbers.
Per-market deep dives
The parcel-level playbooks: Pacoima (the Valley's strongest arithmetic), Canoga Park (the seam-exit variant), plus the house-hacking financing guide and BRRRR/1031 structures for scaling.
Frequently asked questions
Which SFV neighborhood is best for ADU investment?
Pacoima leads on pure arithmetic (lowest basis, largest lots); Arleta, Van Nuys, Reseda, and Canoga Park run the same play at slightly higher entries. The lot beats the neighborhood — screen parcels, not ZIP codes.
What does an ADU cost to build?
Site-dependent — commonly cited budgets run $200K-$400K all-in for detached units depending on size, finishes, and utility work. Get current contractor bids during escrow; never underwrite on averages.
What cap rate should I expect?
Whatever real rents over real all-in costs produce — entry-tier Valley ADU projects can outperform standard SFR rentals precisely because basis is low, but the honest number comes from your parcel's math, not a benchmark.
Work with Brian Cooper
20+ years and $100M+ closed across Ventura County, the San Fernando Valley, and the Conejo Valley. Direct, data-first representation — you work with Brian, not a hand-off.
Contact Brian Home Value