$1,595,000
657 Walnut St Apt 331, San Carlos 94070
AddressIntel AI Briefing
This San Carlos condo unit represents a premium-priced investment with a significant markup over the local market average. With only one unit available in the building, a bulk-purchase angle is unavailable, making this a pure individual play. Strong rental yields are possible, but investors must weigh the high entry cost against the solid neighborhood appreciation.
Property Permit History
| Date | Project Type | Status | Valuation | Contractor |
|---|---|---|---|---|
| 2026-04-09 | MEP - Mechanical Miscellaneous | Finaled | $4,113 | NUR HVAC INC |
| 2025-09-18 | Building (Residential) - Bathroom Remodel | Plan Approval Expired | $1,500 | Owner Builder |
| 2025-07-16 | Building (Residential) - Bathroom Remodel | Plan Approval Expired | $25,000 | Owner Builder |
| 2025-06-05 | Building (Residential) - Bathroom Remodel | Finaled | $7,500 | CITY OF SAN CARLOS LESSEE |
| 2025-01-28 | MEP - New FAU | Finaled | $1,560 | CITY OF SAN CARLOS LESSEE |
| 2024-03-14 | MEP - Water Heater | Finaled | -- | ACCO ENGINEERED SYSTEMS |
| 2023-10-19 | Building (Residential) - Bathroom Remodel | Expired | $13,000 | BAY BUILDING & CONSTRUCTION INC |
| 2023-05-25 | Building (Commercial) - Signage | Finaled | -- | CITY OF SAN CARLOS LESSEE |
| 2023-03-29 | Building (Residential) - Bathroom Remodel | Finaled | $20,000 | CITY OF SAN CARLOS LESSEE |
Recent Neighborhood Remodeling (San Carlos)
Parcel & Zoning Info
Condo Investment Snapshot
Price positioning vs. 90 recent comparable condo/townhome sales in this ZIP. Est. rent is a rule-of-thumb (price ÷ 24 ÷ 12), not a market quote. SB 9 / ADU development analysis doesn't apply to condos: the owner doesn't control the underlying land.
Seller Motivation
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.
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. 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
Arroyo
San Carlos Elementary
Central Middle
San Carlos Elementary
Redwood High
Sequoia 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
88/100
Based on recent sales velocity and local demand in 94070.
Flippability Score
15/100
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.
Median of 12 recent condo sales in San Carlos (94070): $894/sqft, plus 5% because new houses sold at a median 1.07x their comps across 239 real rebuilds. Sized within 50% of the 2,200 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.
Projected Profit
Warning: Project is mathematically underwater.
Recent Comparables (San Carlos 94070)
Sized to the modelled 2,200 sqft build: sales within 50% of it. Smaller houses sell for more per foot, so pricing a rebuild off them overstates resale.