$1,748,000
215 Ottawa St, San Mateo 94401
AddressIntel AI Briefing
The existing structure's fully updated condition limits teardown upside, making a stealth density primary plus ADU/JADU expansion the best play. Active local contractor activity shows strong neighborhood interest, but liquefaction hazards represent a cost blocker for heavy foundation work. An SB 9 split is possible but less lucrative than maintaining the renovated main house.
Property Permit History
Recent Neighborhood Remodeling (San Mateo)
Parcel & Zoning Info
ADU Potential
Flag / irregular · Corner lot · ~109 ft frontage × 117 ft deep — a tucked-away rear unit is very private; access is typically via the pole driveway. A second street frontage lets an ADU take its own entrance and address.
Screening heuristic based on lot size, existing coverage, lot orientation, and hazard overlays. CA ADU law is ministerial statewide; verify max size, setbacks, and JADU owner-occupancy with the local planning dept.
Redevelopment Potential
Existing home already uses most of the allowable floor area — little expansion headroom. Zoning allows roughly 2,750 sqft of gross floor area on this lot.
Screening estimate comparing existing living area to the city's single-family floor-area limit. FAR figure is a discretionary-review trigger, not a hard cap — treat as approximate. Source: San Mateo Muni Code 27.18.060 (R1-B/C); 6,000 sqft cap (as of 2026-06-30). Verify FAR, coverage, setbacks, and height with the local planning dept.
Hazard Snapshot
Flood Zone
Fire Severity
Liquefaction
Fault Zone
Not a substitute for a Natural Hazard Disclosure (NHD) report. Zones reflect available GIS data and may not cover all localities.
Nearby Public Schools
North Shoreview Montessori
San Mateo-Foster City
Borel Middle
San Mateo-Foster City
The Bridge Academy
San Mateo Union High
School boundaries are subject to change. Nearest school distance does not guarantee enrollment eligibility. Check with the local district. Data provided by CDE.
Proprietary Intelligence
Market Heat Index
65/100
Based on recent sales velocity and local demand in 94401.
Flippability Score
42/100
Measures neighborhood renovation density vs. recent permits on this property.
Bidding War Prob.
40%
Likelihood of multiple offers based on local list-to-sale ratios and DOM.
Proforma ROI Calculator
Back-of-the-napkin deal analysis across development strategies.
Based on 6 recent sales in 94401 averaging $919/sqft.
Projected Profit
Warning: Project is mathematically underwater.