31 Acton Street, San Francisco
technical data · neighborhood and transit
Quick answers
- Does 31 Acton Street have open permits or code violations?
- San Francisco Department of Building Inspection lists 21 permits, 6 not closed, and 0 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 31 Acton Street at risk for?
- FEMA's National Risk Index rates the area relatively low overall, with elevated earthquake risk.
Permits and code violations
6 permits not closed out. Unfinished permits pass to the next owner.
- Otc alterations permit Jan 2026Complete
To obtain final inspection for work approved under pa# 202210265231. all work is complete.
- Otc alterations permit Oct 2022Expired
Install (n) garage door. steel sectional.
- Otc alterations permit Oct 2017Complete
Reroofing
- Additions alterations or repairs Jul 2015Complete
Install an environment remediation system to remove and treat gasoline from soil and groundwater beneath the site. includes, trenching to wells, elec. to prewired equipment, plmg, connect to city sewer(on site lateral and natural gas. install 6' high chain link fence around the remediation compound
- Otc alterations permit Mar 2004Issued
Address assignment
- Otc alterations permit Feb 2004Complete
Correct 200401204386:basement, between garage & utilityrm 2 doors, add 1-colset between 2 bedrms
- Otc alterations permit Jan 2004Complete
Add 1 bedrm, 1 storage-one utility rm & bath at existing st level flr
- Otc alterations permit Oct 2003Issued
Sidewalk repair
- Additions alterations or repairs Dec 2001Complete
Add two full bathrooms . one guest room & one exercise room in grd flr level. provide one hour rate
- Otc alterations permit Nov 1999Complete
Reroofing
- Otc alterations permit Oct 1999Complete
Reroofing
- Otc alterations permit Feb 1995Complete
Install temp facl.for vapor extraction sys, fence encl, pipe
San Francisco Department of Building Inspection
Safety and environment
FEMA natural hazard risk
Relatively Low
Highest for this area: earthquake. These drive insurance cost here.
FEMA National Risk Index, census tract
Nearest active fault
3.3 mi
San Andreas fault zone, slip rate greater than 5.0 mm/yr. Ask about seismic retrofit and earthquake insurance.
USGS Quaternary Fault Database
Quakes M4.5+ since 1970
2 within 30 mi
Every recorded earthquake of magnitude 4.5 or stronger within 30 miles.
USGS earthquake catalog
Leaking fuel tanks
12 within 1,650 ft
Nearest: Shell Station #4003, 5897 Mission Street (150 ft), open. 1 still open. Ask whether groundwater or soil vapor testing was done.
EPA UST Finder, leaking underground storage tank releases
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
1,650 ft
Longfellow Elementary (1,650 ft), George Washington Elementary (1,800 ft), Sheridan Elementary (3,000 ft). Confirm the assigned school with the district.
U.S. Department of Education, NCES
Major airport
7.5 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 Acton Street
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.
- 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 specifically where you'd park: is there paid city parking, who currently holds it, what the permit costs, and how long the waitlist is.
- Knock on a neighboring door and ask two things: what bothers them most often, and what work is planned for the building.
- Look at the stairwell (cleanliness, smell) and the association's notice board: unpaid dues, conflicts, recent decisions.
- 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.
Neighborhood recommendations are derived from public OpenStreetMap data and may be incomplete. Checking in person is still what matters most.
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