$2,398,000
523 Iowa Dr, San Mateo 94402
AddressIntel AI Briefing
This property offers a highly favorable value gap with high-value local new builds selling near $1,500 per square foot. The optimal play is stealth density: primary + ADU + JADU to preserve the existing structure while adding high-value rental income. Strong owner-occupancy and household income metrics limit downside risk.
Property Permit History
Recent Neighborhood Remodeling (San Mateo)
Parcel & Zoning Info
ADU Potential
Flag / irregular · Corner lot · ~120 ft frontage × 121 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 3,000 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
Baywood Elementary
San Mateo-Foster City
Borel Middle
San Mateo-Foster City
Aragon High
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
73/100
Based on recent sales velocity and local demand in 94402.
Flippability Score
68/100
Measures neighborhood renovation density vs. recent permits on this property.
Bidding War Prob.
63%
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 94402 averaging $1,263/sqft.
Projected Profit
Warning: Margin is tight for the construction risk.