400 Argonaut Avenue, San Francisco
technical data · neighborhood and transit
Quick answers
- Does 400 Argonaut Avenue have open permits or code violations?
- San Francisco Department of Building Inspection lists 13 permits, 6 not closed, and 7 violations.
- What is the 2026 conforming loan limit in San Francisco County?
- $1,249,125 for a single-unit home, per FHFA. Larger loans are jumbo loans.
- Is radon a problem here?
- EPA radon zone 2, moderate potential.
- What natural disasters is 400 Argonaut Avenue at risk for?
- FEMA's National Risk Index rates the area very low overall.
Permits and code violations
6 permits not closed out. Unfinished permits pass to the next owner. No open violations.
- Otc alterations permit Jan 2023Complete
Replace (3) window (n) vinyl: in kind same size and location rerto fit install u-factor < or = 0.30 street visible
- Otc alterations permit May 2019Issued
Replace sectional rollup garage door in kind with new metal door no structural changes.
- Otc alterations permit Oct 2017Issued
Replacing two windows in the back wall. also installing 2 sq ft of siding, james hardy plus lap siding traditional red. maher n/a
- Otc alterations permit Sep 2017Complete
Reroofing
- Otc alterations permit Jul 2016Complete
Install select cedar mill fiber cement )color artic white) to back of house, not visible from the street 300 sq ft.
- Otc alterations permit Sep 2009Issued
Install two vinyl round top windows, visible from st. u value, 38-.52
- Otc alterations permit Jan 1999Expired
Reroofing
- Otc alterations permit Nov 1997Expired
Reroofing
- Otc alterations permit Feb 1994Expired
Install furnace
- Otc alterations permit Oct 1991Complete
Reroofing
- Otc alterations permit Dec 1990Complete
Reroof
- Otc alterations permit Oct 1990Complete
Repair front entrance,stairs ,landing
San Francisco Department of Building Inspection
Safety and environment
FEMA natural hazard risk
Very Low
No single natural hazard ranks high for this area.
FEMA National Risk Index, census tract
Superfund site
2.8 mi
Hunters Point Naval Shipyard (NPL Site). Check groundwater and vapor reports on the EPA site page.
EPA National Priorities List
Leaking fuel tanks
2 within 1,650 ft
Nearest: Mcdonald'S Restaurant, 2750 Geneva (900 ft), no further action. Every release here is closed by the state regulator.
EPA UST Finder, leaking underground storage tank releases
Toxic release facility
3,100 ft
Pacific Lithograph Co Inc and 1 more within a mile. Reports chemical releases to air, water or land to EPA each year.
EPA Toxics Release Inventory
High-voltage line
950 ft
230 kV line run by PACIFIC GAS & ELECTRIC COMPANY.
HIFLD transmission lines
Radon potential
Moderate
Average indoor levels of 2 to 4 pCi/L. EPA still suggests testing ground-floor and basement units.
EPA and USGS Geologic Radon Potential Map
Nearest public schools
1,550 ft
Bayshore (1,550 ft), Visitacion Valley Elementary (1,900 ft), Visitacion Valley Middle (2,500 ft). Confirm the assigned school with the district.
U.S. Department of Education, NCES
Major airport
6.6 mi
San Francisco International (SFO). Aircraft may be audible under approach paths.
FAA large-hub airports
Conforming loan limit 2026
$1,249,125
San Francisco County. Mortgages up to this amount qualify for Fannie Mae and Freddie Mac pricing. Above it, the loan is a jumbo with stricter terms.
FHFA Conforming Loan Limit Values, one-unit
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Who lives and works in San Francisco
Venture capital, AI labs and the highest founder density in the country
San Francisco runs on company building. Engineering and product salaries set the price floor, offices cluster in SoMa and the Mission, and demand moves with funding cycles rather than with the school calendar.
- $141,446
- median household income
- 19.6%
- residents aged 25 to 34
- 38%
- households that own their home
What pays the bills
- Software and AI
- Venture capital
- Biotech
- Professional services
- Tourism
Who anchors the economy
OpenAI · Salesforce · Stripe · UCSF · Y Combinator
The market is shaped around
- Founders and engineers
- Early career tech workers
- People who move for a company
More on Argonaut Avenue
All addressesViewing recommendations
What's worth checking in person before deciding.
- Test water pressure and temperature at the tap, in the bathroom and kitchen, for at least a minute.
- Ask specifically where you'd park: is there paid city parking, who currently holds it, what the permit costs, and how long the waitlist is.
- Look at the stairwell (cleanliness, smell) and the association's notice board: unpaid dues, conflicts, recent decisions.
- Schedule a viewing on a weekday too, between 6:00 and 7:30 PM, the window when the building is busiest: neighbors, parking, elevator.
- Ask for the latest maintenance bill from a winter month, not a summer one: that's where the real cost of living there shows up.
- Knock on a neighboring door and ask two things: what bothers them most often, and what work is planned for the building.
Neighborhood recommendations are derived from public OpenStreetMap data and may be incomplete. Checking in person is still what matters most.
The year built, height regime, structure, and elevator for this address are being indexed right now, city by city. Save the page and check back: it fills in over time. If you live here, you can fill it in yourself in a minute by leaving a review.