NeighborsPaid
Work classified asADU / Guest House
Jurisdictions10
Permits read6,021
Spread3.4x
Data as of2026-09-24

Cross-jurisdiction comparison

ADU / Guest House costs 3.4× more in Seattle than in Montgomery County

6,021 permits across 10 jurisdictions. Each bar is the median value declared on the filing.

Seattle, WA
$219,202
Everett, WA
$175,630
Corona, CA
$166,105
Sacramento, CA
$123,470
Raleigh, NC
$113,354
Los Angeles, CA
$100,000
Chicago, IL
$94,100
New York, NY
$90,000

Reading the spread

Across 10 jurisdictions the middle one files a median of $123,470, and 4 of them land within a quarter of that. The gap in the headline is between Seattle and Montgomery County — a difference between cities, not a range to expect inside one.

Within a single city the spread is wider still. Montgomery County runs from $25,000 at the tenth percentile to $352,000 at the ninetieth, 14.1× end to end, while Raleigh is the tightest at 3.0×. That is the number worth carrying into a conversation with a contractor: a quote outside your own city's range is worth asking about, and a quote outside another city's tells you nothing.

8 of these 10 jurisdictions cleared 60 permits, which is the bar this site sets before a city may hold either end of a comparison. The rest are shown because their own page is worth reading, not because they are precise enough to headline.

Full numbers

City10%Median 90%Permits
Seattle, WA $119,986$219,202 $640,1531,195
Everett, WA $33,000$175,630 $450,00097
Corona, CA $63,667$166,105 $201,08788
San Francisco, CA $35,994$165,000 $309,999167
Sacramento, CA $46,315$123,470 $211,17038
Raleigh, NC $75,333$113,354 $226,05369
Los Angeles, CA $30,000$100,000 $250,0004,156
Chicago, IL $35,000$94,100 $340,00053
New York, NY $33,356$90,000 $421,15297
Montgomery County, MD $25,000$65,000 $352,00061

Declared permit values, last 24 months. Updated 2026-09-24. Methodology.