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ActiveSingle Family

$2,799,000

3103 Mena Dr, San Mateo 94403

Beds4
Baths4.5
Sqft2,884
DOM6
No Photos Available

AddressIntel AI Briefing

The optimal play is stealth density: primary + ADU + JADU, but the play is heavily blocked by low ADU feasibility and structural liquefaction risks. A modern 2018 build age and extremely high lot coverage also preclude teardown strategies.

Property Permit History

No permit history found directly associated with this property's address.

Recent Neighborhood Remodeling (San Mateo)

2026-07-231259 NADINA ST Unit: B SAN MATEO CA 94402-2920
Single Family (Alteration/Repair) - Alter
$106,792Issued
2026-07-23628 COSTA RICA AVE SAN MATEO 94402-1013 CA
Single Family (New) - New
$85,953Issued
2026-07-23208 SAN MIGUEL AVE SAN MATEO 94403-2956 CA
Single Family (Addition) - Add/Alter
$313,091Issued
2026-07-22639 PICO AVE SAN MATEO 94403-1239 CA
Single Family (Alteration/Repair) - Kitchen & Bath Remodel (Flat)
$25,000Issued
2026-07-22128 BURBANK AVE SAN MATEO 94403-5127 CA
Single Family (Alteration/Repair) - Alter
$15,776Issued
2026-07-22615 9TH AVE SAN MATEO CA 94402-1427
Single Family (Alteration/Repair) - Kitchen & Bath Remodel (Flat)
$10,000Issued

Parcel & Zoning Info

APN117460160
Official Lot Sqft2,468
Zoning CodeNO DATA ASSIGNED
SB 9 StatusLikely · up to 4 units
SB 9 Block Reasons No SB 9 disqualifiers found
Development Blockers
Liquefaction
Unlock Pathways
Ministerial ADU Ministerial SB 9 Density Bonus
Entitlement RiskLow (0/100)

ADU Potential

Feasibility Score20/100
Max ADU Units2 (ADU + JADU)
Est. ADU Size500 sqft
Existing Coverage116.8%

Flag / irregular · Corner lot · ~69 ft frontage × 72 ft deepa 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

Redevelopment Score4/100
ClassBuilt out
FAR Utilization234% of allowed
Buildable Headroom+0 sqft

Existing home already uses most of the allowable floor area — little expansion headroom. Zoning allows roughly 1,234 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

X
Area of minimal flood hazard.

Fire Severity

None
Not in a mapped state fire severity zone.

Liquefaction

Yes
In a mapped liquefaction zone. May require specialized foundation engineering.

Fault Zone

No
Not in a mapped Alquist-Priolo 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

Elementary School

George Hall Elementary

San Mateo-Foster City

0.4 miles away
Middle School

Abbott Middle

San Mateo-Foster City

1.0 miles away
High School

Hillsdale High

San Mateo Union High

1.0 miles away

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

83/100

Based on recent sales velocity and local demand in 94403.

Flippability Score

30/100

Measures neighborhood renovation density vs. recent permits on this property.

Bidding War Prob.

64%

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 94403 averaging $945/sqft.

Hard Costs$1,730,400
New Build4,326 sqft
Total Capital Required$4,704,400
Estimated Resale (ARV)$4,088,070

Projected Profit

-$616,330
-13.1% ROI

Warning: Project is mathematically underwater.

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