637 47th Avenue, San Francisco
technical data · neighborhood and transit
Quick answers
- Does 637 47th Avenue have open permits or code violations?
- San Francisco Department of Building Inspection lists 39 permits, 10 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 637 47th Avenue at risk for?
- FEMA's National Risk Index rates the area relatively moderate overall, with elevated earthquake risk.
Permits and code violations
10 permits not closed out. Unfinished permits pass to the next owner.
- Otc alterations permit Aug 2024Complete
Revision to pa# 202306210502: minor structural revison to detail e.f. and g/s-2 (roof deck guardrail details)
- Otc alterations permit Jul 2024Complete
Reroofing
- Otc alterations permit Oct 2023Complete
Renovation to (e) rec room at rear of (e) g/f. enclose (e) lightwell at 2/f. remodel (e) kitchen. renovate (e) master suite at 3/f. relocate 2nd bathroom to 3/f. minor change to 3 steps hallway next to (e) stair on g/f.
- Otc alterations permit Jul 2023Complete
Remodel 2nd and 3rd floor bathroom (1 each floor) in kind. replace tub, cabinet, toilet, light fixtures and exhaust fan tiles.
- Additions alterations or repairs Jun 2023Complete
New roof deck
- Otc alterations permit Jun 2023Issued
Re-roofing: remove and replace roofing material / existing roofing material (in-kind)
- Otc alterations permit Jan 2020Complete
Replacement of one full bahtroom. expansion of 49 sq feet of conditioned space into existing garage, new lighting electrical and plumbing on ground floor.
- Otc alterations permit Dec 2018Issued
Reroofing
- Otc alterations permit Dec 2018Complete
Markoff structural pest control co- supp report 18568, item #1 repair/replace in-kind
- Otc alterations permit Dec 2017Complete
Replace 2 leaking windows in kind on ground floor at back of house. replace 1 door unit in kind at back of house.
- Otc alterations permit Dec 2016Complete
Replace stucco at facade facing the street replace in-kind. no stud or wood sheathing replacement.
- Otc alterations permit Jul 2016Cancelled
Build stairs at lightwell. not seen by neighbors in any direction
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
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
3,300 ft
Lafayette Elementary (3,300 ft), Washington (George) High (5,000 ft). Confirm the assigned school with the district.
U.S. Department of Education, NCES
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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637 47th Avenue is in San Francisco.
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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 47th Avenue
All addressesViewing recommendations
What's worth checking in person before deciding.
- Semi-detached or row house: the shared wall matters. Listen from the room adjoining the neighbor's side and ask whether any structural work has been done there.
- Test water pressure and temperature at the tap, in the bathroom and kitchen, for at least a minute.
- This is a house, not an apartment. Check the lot boundaries, car access, and how water drains from the yard after rain, including whether the neighboring lot sits higher and could send water toward the property.
- Ask what heating system is in place (own boiler, wood, gas) and request the last winter month's bills.
- Check the sewer connection (public network or septic tank) and the water source (public network or well), including pressure and water quality.
- Check exactly where you'd park: a spot in the yard or garage, or street parking, and how crowded the street gets in the evening.
- Schedule a viewing in the evening too, on a weekday, to see street traffic, streetlights, and how quiet the neighborhood is after 8 PM.
Neighborhood recommendations are derived from public OpenStreetMap data and may be incomplete. Checking in person is still what matters most.