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ActiveSingle Family

$2,199,000

3106 Marburger Ave, Belmont 94002

Beds3
Baths2
Sqft1,340
DOM10
No Photos Available

AddressIntel AI Briefing

Developing on this site is severely constrained by a landslide zone and negative margins. The optimal play is stealth density: primary + ADU + JADU to minimize heavy site grading and structural risks.

Property Permit History

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

Recent Neighborhood Remodeling (Belmont)

2026-08-211520 DESVIO WAY
ALTERATION - WINDOWS
--ACTIVE
2026-08-192486 HALLMARK DR
ALTERATION - ALTERATION
--ACTIVE
2026-08-173313 HASKINS DR
ALTERATION - DECK
--IN REVIEW
2026-08-142037 BELLE MONTI AVE
ALTERATION - ALTERATION
--IN REVIEW
2026-08-141039 CONTINENTALS WAY
ALTERATION - ALTERATION
--APPROVED
2026-08-141039 CONTINENTALS WAY
ALTERATION - ALTERATION
--APPROVED

Parcel & Zoning Info

APN043202040
Official Lot Sqft4,417
Zoning CodeNO DATA ASSIGNED
SB 9 StatusLikely · up to 4 units
SB 9 Block Reasons No SB 9 disqualifiers found
Development Blockers
Landslide
Unlock Pathways
Ministerial ADU Ministerial SB 9 Density Bonus
Entitlement RiskLow (0/100)

ADU Potential

Feasibility Score70/100
Max ADU Units2 (ADU + JADU)
Est. ADU Size1,200 sqft
Existing Coverage30.3%

Flag / irregular · Corner lot · ~97 ft frontage × 97 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

Redevelopment Score15/100
ClassBuilt out
FAR Utilization76% of allowed
Buildable Headroom+427 sqft

Existing home already uses most of the allowable floor area, little expansion headroom. Zoning allows roughly 1,767 sqft of gross floor area on this lot.

Screening estimate comparing existing living area to the city's single-family floor-area limit. City sets no explicit FAR (or is not individually curated); allowable area is a conservative estimate. Source: conservative default (0.40 FAR — city not individually curated) (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

Moderate
Elevated fire risk; impacts insurance cost and building materials.

Liquefaction

No
Not in a mapped liquefaction zone.

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

Cipriani Elementary

Belmont-Redwood Shores Elementary

0.3 miles away
Middle School

Ralston Intermediate

Belmont-Redwood Shores Elementary

0.2 miles away
High School

Hillsdale High

San Mateo Union High

1.2 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

67/100

Based on recent sales velocity and local demand in 94002.

Flippability Score

20/100

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

Bidding War Prob.

42%

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.

We don't hold this jurisdiction's floor-area rule, so the default builds to roughly 1,767 sqft from a conservative 0.40 FAR approximation — a starting point, not a zoning answer. Check the local code before you rely on it.

Median of 12 recent single-family sales in Belmont (94002): $1,320/sqft. Sized within 25% of the 1,800 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.

Hard Costs$990,000
New Build1,800 sqft
Total Capital Required$3,364,000
Estimated Resale (ARV)$2,376,000
Cost of Sale (5%)-$118,800
Net Proceeds$2,257,200

Projected Profit

-$1,106,800
-32.9% ROI

Warning: Project is mathematically underwater.

Recent Comparables (Belmont 94002)

Sized to the modelled 1,800 sqft build: sales within 25% of it. Smaller houses sell for more per foot, so pricing a rebuild off them overstates resale.

3416 Plateau Dr

Sold
$2,473,000
Sold: 2026-08-06
Lot: 6,162
Sqft: 1760
$/Sqft: $1,405

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Sqft: 1390
$/Sqft: $1,691

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$1,950,000
Sold: 2026-08-05
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Sqft: 1850
$/Sqft: $1,054

2433 Hastings Dr

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$2,400,000
Sold: 2026-07-22
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Sqft: 2250
$/Sqft: $1,067

3307 Bay Ct

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$1,999,000
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505 Hiller St

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$/Sqft: $1,536

2124 Forest Ave

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$1,908,000
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$/Sqft: $1,281

2019 Mezes Ave

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$2,200,000
Sold: 2026-07-09
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$/Sqft: $1,272

2326 Buena Vista Ave

Sold
$2,550,000
Sold: 2026-07-06
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Sqft: 1600
$/Sqft: $1,594

1432 Fifth Ave

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$1,850,000
Sold: 2026-07-02
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Sqft: 1360
$/Sqft: $1,360

2045 Mezes Ave

Sold
$2,930,000
Sold: 2026-06-30
Lot: 6,250
Sqft: 1850
$/Sqft: $1,584