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ActiveSingle Family

$2,895,000

18600 Castle Ridge Dr, Morgan Hill 95037

Beds5
Baths6.5
Sqft5,848
DOM131
No Photos Available

AddressIntel AI Briefing

A luxury mansion on over two acres that is best handled as a high-end renovation play. While the lot is massive, a complete teardown is highly wasteful; instead, focus on a luxury interior remodel and a stealth density play by adding high-end detached ADUs. Hillside development constraints are the main potential blockers.

Property Permit History

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

Recent Neighborhood Remodeling (Morgan Hill)

Parcel & Zoning Info

APN76430045
Official Lot Sqft109,336
Zoning Code--
SB 9 StatusLikely · up to 4 units
SB 9 Block Reasons No SB 9 disqualifiers found
Development Blockers
High Fire Zone Landslide
Unlock Pathways
Ministerial ADU Ministerial SB 9 Density Bonus
Entitlement RiskLow (6/100)

ADU Potential

Feasibility Score96/100
Max ADU Units2 (ADU + JADU)
Est. ADU Size1,200 sqft
Existing Coverage5.3%

Flag / irregular · Corner lot · ~320 ft frontage × 575 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.

Seller Motivation

Motivation Score30/100
Some motivation
90+ days on market

Inferred from days on market and listing-description language (e.g. "as-is", "estate sale", "motivated seller"). A screening heuristic for likely negotiability, not a statement about the seller's circumstances.

Redevelopment Potential

Redevelopment Score68/100
ClassExpansion room
FAR Utilization13% of allowed
Buildable Headroom+37,886 sqft

Meaningful unused floor-area headroom under current zoning, room to add square footage. Zoning allows roughly 43,734 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

High
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. Liquefaction and fault flags: modified from California Geological Survey, Web Service of Official Maps of Alquist-Priolo Earthquake Fault Zones and Web Service of Official Maps of Seismic Hazard Zones (2025).

Nearby Public Schools

Elementary School

P. A. Walsh STEAM Academy

Morgan Hill Unified

1.4 miles away
Middle School

Lewis H. Britton Middle

Morgan Hill Unified

1.5 miles away
High School

Central High (Continuation)

Morgan Hill Unified

1.3 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

87/100

Based on recent sales velocity and local demand in 95037.

Flippability Score

55/100

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

Bidding War Prob.

1%

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.

Median of 12 recent single-family sales in Morgan Hill (95037): $666/sqft, plus 5% because new houses sold at a median 1.07x their comps across 239 real rebuilds. Sized within 50% of the 8,800 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.

Interest on the purchase price for the whole project plus half the build budget, since construction draws ramp up. The default is 7% over 33 months, the median purchase-to-sale time of 239 real Peninsula and South Bay rebuilds. Set the rate to 0 for a cash purchase, or use your own lender's terms.

Hard Costs$4,840,000
New Build8,800 sqft
Total Capital Required$7,910,000
Estimated Resale (ARV)$6,151,200
Cost of Sale (5%)-$307,560
Carry (33mo @ 7%)-$1,039,981
Net Proceeds$4,803,659

Projected Profit

-$3,106,341
-39.3% ROI

Warning: Project is mathematically underwater.

Recent Comparables (Morgan Hill 95037)

Sized to the modelled 8,800 sqft build: sales within 50% of it. Smaller houses sell for more per foot, so pricing a rebuild off them overstates resale.

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