$3,998,000
321 Hillview Ave, Los Altos 94022
AddressIntel AI Briefing
The optimal play for this high-end Los Altos property is teardown-and-mansionize to deliver a premium estate up to the maximum allowable floor area. Supported by a massive 12,197-square-foot lot in a highly affluent neighborhood, there are no development blockers to restrict this path. While SB 9 is technically feasible, the demographics and neighboring home profile strongly favor a single high-end luxury build.
Property Permit History
Recent Neighborhood Remodeling (Los Altos)
Parcel & Zoning Info
ADU Potential
Wide & shallow · Corner lot · ~103 ft frontage × 120 ft deep, limited depth, an ADU likely sits beside the house rather than behind it. 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
Meaningful unused floor-area headroom under current zoning, room to add square footage. Zoning allows roughly 3,970 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: Los Altos Muni Code 14.06.070/14.08.070/14.10.070/14.12.070 (R1-10/H/20/40, one shared formula) (as of 2026-08-24). 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
Almond Elementary
Los Altos Elementary
Isaac Newton Graham Middle
Mountain View Whisman
Los Altos High
Mountain View-Los Altos 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 94022.
Flippability Score
78/100
Measures neighborhood renovation density vs. recent permits on this property.
Bidding War Prob.
16%
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.
Zoning allows roughly 3,970 sqft on this lot, and the default builds to that envelope. The FAR figure is a discretionary-review trigger, not a hard cap.
Median of 12 recent single-family sales in Los Altos (94022): $2,068/sqft. Sized within 25% of the 4,000 sqft build, because smaller houses sell for more per foot and pricing a rebuild off them overstates resale.
Commission, transfer tax and closing. Deducted from resale before profit, so the ROI below is net of the exit rather than gross.
Carry on total capital for the project duration. At 0% the model is a cash purchase; 12 months at a typical construction-loan rate moves ROI by 6 to 10 points on a deal this size, so price it with your real rate.
Projected Profit
Recent Comparables (Los Altos 94022)
Sized to the modelled 4,000 sqft build: sales within 25% of it. Smaller houses sell for more per foot, so pricing a rebuild off them overstates resale.