$4,795,000
1700 Castilleja Ave, Palo Alto 94306
AddressIntel AI Briefing
The optimal play is an SB 9 lot split into multiple units to unlock the density potential of this clear, hazard-free 104-year-old property. Zero hazard indicators reduce municipal friction, and the high-income demographics support a strong exit valuation. An aggressive scrape-and-rebuild plan will capture the substantial submarket price per square foot.
Property Permit History
Recent Neighborhood Remodeling (Palo Alto)
Parcel & Zoning Info
ADU Potential
Flag / irregular · Corner lot · ~124 ft frontage × 141 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 2,841 sqft of gross floor area on this lot.
Screening estimate comparing existing living area to the city's single-family floor-area limit. FAR rule curated from current municipal code. Source: PAMC 18.12.040 Table 2; max house size 6,000 sqft (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
Walter Hays Elementary
Palo Alto Unified
Frank S. Greene Jr. Middle
Palo Alto Unified
Palo Alto High
Palo Alto Unified
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
71/100
Based on recent sales velocity and local demand in 94306.
Flippability Score
70/100
Measures neighborhood renovation density vs. recent permits on this property.
Bidding War Prob.
44%
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 94306 averaging $1,481/sqft.
Projected Profit
Warning: Project is mathematically underwater.