6644 Corson Avenue South, Seattle
technical data · neighborhood and transit
Quick answers
- Does 6644 Corson Avenue South have open permits or code violations?
- Seattle Department of Construction and Inspections lists 5 permits, 1 not closed, and 2 violations.
- What is the 2026 conforming loan limit in King County?
- $1,063,750 for a single-unit home, per FHFA. Larger loans are jumbo loans.
- Is radon a problem here?
- EPA radon zone 3, low potential.
- What natural disasters is 6644 Corson Avenue South at risk for?
- FEMA's National Risk Index rates the area very high overall, with elevated earthquake and inland flooding risk.
Permits and code violations
1 permit not closed out. Unfinished permits pass to the next owner. No open violations.
- Addition/alteration Jun 2021Issued
Construct alterations to existing single family residence to convert basement into accessory dwelling unit (aadu) per plan.
- New Feb 2017Completed
Construct duplex per plans. (establish use as townhouses and construct one duplex and one 3-unit townhouse. reviews and processing for 2 a/p's under 6520445)
- New Aug 2014Completed
Establish use as and construct new two units townhouse structure with attached garage in rear yard of existing single family residence per plan
- Addition/alteration Jan 2014Completed
Construct alts. to replace doors windows and install air blend fan for king co. residential aircraft noise remedy impr. program group m-45 per floor plan and stfi.
- Addition/alteration Jan 2014Completed
Construct alts. to replace doors windows and install air blend fan for king co. residential aircraft noise remedy impr. program group m-45 per floor plan and stfi.
Seattle Department of Construction and Inspections
Safety and environment
FEMA natural hazard risk
Very High
Highest for this area: earthquake, inland flooding. These drive insurance cost here.
FEMA National Risk Index, census tract
Nearest active fault
1.9 mi
Seattle fault zone, slip rate between 0.2 and 1.0 mm/yr. Ask about seismic retrofit and earthquake insurance.
USGS Quaternary Fault Database
Superfund site
2.7 mi
Lower Duwamish Waterway (NPL Site). Check groundwater and vapor reports on the EPA site page.
EPA National Priorities List
Leaking fuel tanks
8 within 1,650 ft
Nearest: Wa Dot Corson, 6431 Corson Ave S (850 ft), open. 8 still open. Ask whether groundwater or soil vapor testing was done.
EPA UST Finder, leaking underground storage tank releases
Brownfield site
950 ft
Perovich Brothers Former Gas Station and 2 more within half a mile. Former industrial land in EPA's cleanup and reuse program.
EPA ACRES Brownfields
Radon potential
Low
Geology here keeps indoor radon low on average.
EPA and USGS Geologic Radon Potential Map
Wildfire risk
Very Low
Wildfire risk is low enough that standard home insurance usually covers it.
FEMA National Risk Index
Nearest public schools
3,950 ft
Cleveland High School STEM (3,950 ft). Confirm the assigned school with the district.
U.S. Department of Education, NCES
Major airport
6.4 mi
Seattle-Tacoma (SEA). Aircraft may be audible under approach paths.
FAA large-hub airports
Conforming loan limit 2026
$1,063,750
King 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 Seattle
Cloud, aerospace and one of the highest engineering wage bases in the country
Seattle is a two-industry city that pays well. Cloud and aerospace set salaries, the downtown core is dense with towers, and the residential neighborhoods around it stay low rise and green.
- $116,068
- median household income
- 20.9%
- residents aged 25 to 34
- 46%
- households that own their home
What pays the bills
- Cloud and software
- Aerospace
- Retail headquarters
- Healthcare
- Maritime
Who anchors the economy
Amazon · Microsoft · Boeing · Starbucks · University of Washington
The market is shaped around
- Engineers and product staff
- Dual-income couples
- Owners in low-rise neighborhoods
More on Corson Avenue South
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.
- 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 to see the construction documents (permit, sign-off) and check for visible cracks on the facade or in the attic/basement.
- Check the roof, gutters, and downspouts for signs of leaks or recent repairs, especially if it has rained recently.
- Schedule a viewing in the evening too, on a weekday, to see street traffic, streetlights, and how quiet the neighborhood is after 8 PM.
- Knock on a neighboring gate and ask about noise, pets, flooding, or other issues common in the area.
- Check the condition of the fence, yard, and sidewalk out front: who is responsible for upkeep, and whether there are any boundary disputes with neighbors.
Neighborhood recommendations are derived from public OpenStreetMap data and may be incomplete. Checking in person is still what matters most.