255 Allison Street, San Francisco
technical data · neighborhood and transit
Quick answers
- Does 255 Allison Street have open permits or code violations?
- San Francisco Department of Building Inspection lists 14 permits, 4 not closed, and 4 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 255 Allison Street at risk for?
- FEMA's National Risk Index rates the area relatively moderate overall, with elevated earthquake risk.
Permits and code violations
4 permits not closed out. Unfinished permits pass to the next owner. No open violations.
- Otc alterations permit Mar 2019Complete
Revision to pa 201710030234 for final window replacement in-kind. new roof in rear of building, replace 500 sq ft siding in-kind, replace 500 sq ft sheet rock in-kind, window & siding not visible
- Otc alterations permit Dec 2018Issued
Street space
- Otc alterations permit Jul 2018Complete
Reframe 3 (e) bathroom walls in-kind out to dryrot. replace 450sf of subfloor due to dry rott. drywall repairs for mep. replace 30% of rear deck & stairs, in-kind due to dry rot.
- Otc alterations permit Oct 2017Complete
Remodel (1) ktichen and two bathrooms in kind
- Otc alterations permit Aug 2006Complete
Repair ext. stair. in front of bldg. nothing to be removed. sealing of leaks on existing stairs.
- Otc alterations permit Feb 2006Issued
Reroofing
- Otc alterations permit Nov 1999Complete
Termite repair
- Otc alterations permit Feb 1998Expired
Install 6 replacement windows/some visible from street
- Additions alterations or repairs Feb 1998Complete
Add rooms at ground floor
- Otc alterations permit Sep 1997Expired
Reroofing
- Otc alterations permit Apr 1991Complete
Reroofing
- Otc alterations permit Feb 1987Complete
Fungus and termite repairs to front of structure
San Francisco Department of Building Inspection
Safety and environment
FEMA natural hazard risk
Relatively Moderate
Highest for this area: earthquake. These drive insurance cost here.
FEMA National Risk Index, census tract
Nearest active fault
3.8 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
4 within 1,650 ft
Nearest: Former Gas Station, 5425-5427 Mission Street (1,000 ft), no further action. Every release here is closed by the state regulator.
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
1,800 ft
Longfellow Elementary (1,800 ft), Panorama Elementary (1,950 ft), Guadalupe Elementary (2,050 ft). Confirm the assigned school with the district.
U.S. Department of Education, NCES
Major airport
7.3 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 Allison 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.
- 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.
- Knock on a neighboring door and ask two things: what bothers them most often, and what work is planned for the building.
- 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.
- 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.
Neighborhood recommendations are derived from public OpenStreetMap data and may be incomplete. Checking in person is still what matters most.
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