Live permit history + status for any King County, WA address, parcel or permit number. Read-only.
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Look up building permit history and status for any King County, WA property. Accepts a street address, 10-digit parcel number, or permit number. Live sources: MyBuildingPermit (14 cities + unincorporated King County), Seattle and Bellevue open data, Renton EnerGov, Redmond Civic Access, Shoreline eTRAKiT, Woodinville + King County Accela, Normandy Park and Carnation SmartGov, SeaTac LAMA, WA State L&I (electrical), plus the King County Assessor's issued-permit index for every parcel (covers the 19 cities without a public portal; history only, no status). Jurisdiction is derived from the city-limits polygon, not the mailing city. Returns all matching permits sorted newest-first. Use for due diligence, permit tracking, or verifying contractor pull history.
Max permits to return (newest first). summary always covers the whole matched set, so start small and raise only if you need the rows.
One of: street address ('1817 Morris Ave S, Renton WA 98055'), 10-digit parcel number (plain '7222000353' or formatted '722200-0353'), or permit number ('B25000947', 'ADDC21-0275', '23-127651-LP', '6145915-CN'). Input type is auto-detected.
Only permits applied/issued on or after this date (YYYY-MM-DD).
Case-insensitive substrings matched against each permit's type, e.g. ['electrical', 'mechanical'].
WA L&I contractor license number — same search by license. Use instead of query.
Contractor company name (substring) — returns what they have pulled across the MyBuildingPermit cities. Use instead of query.
Look up building permit history and status for any King County, WA property. Accepts a street address, 10-digit parcel number, or permit number. Live sources: MyBuildingPermit (14 cities + unincorporated King County), Seattle and Bellevue open data, Renton EnerGov, Redmond Civic Access, Shoreline eTRAKiT, Woodinville + King County Accela, Normandy Park and Carnation SmartGov, SeaTac LAMA, WA State L&I (electrical), plus the King County Assessor's issued-permit index for every parcel (covers the 19 cities without a public portal; history only, no status). Jurisdiction is derived from the city-limits polygon, not the mailing city. Returns all matching permits sorted newest-first. Use for due diligence, permit tracking, or verifying contractor pull history.
| Argument | Type | Description |
|---|---|---|
| limit | integer | Max permits to return (newest first). summary always covers the whole matched set, so start small and raise only if you need the rows. |
| query | string | One of: street address ('1817 Morris Ave S, Renton WA 98055'), 10-digit parcel number (plain '7222000353' or formatted '722200-0353'), or permit number ('B25000947', 'ADDC21-0275', '23-127651-LP', '6145915-CN'). Input type is auto-detected. |
| since | string | Only permits applied/issued on or after this date (YYYY-MM-DD). |
| types | array | Case-insensitive substrings matched against each permit's type, e.g. ['electrical', 'mechanical']. |
| license | string | WA L&I contractor license number — same search by license. Use instead of query. |
| contractor | string | Contractor company name (substring) — returns what they have pulled across the MyBuildingPermit cities. Use instead of query. |
{
"type": "object",
"required": [],
"properties": {
"limit": {
"type": "integer",
"default": 50,
"minimum": 0,
"description": "Max permits to return (newest first). summary always covers the whole matched set, so start small and raise only if you need the rows."
},
"query": {
"type": "string",
"description": "One of: street address ('1817 Morris Ave S, Renton WA 98055'), 10-digit parcel number (plain '7222000353' or formatted '722200-0353'), or permit number ('B25000947', 'ADDC21-0275', '23-127651-LP', '6145915-CN'). Input type is auto-detected."
},
"since": {
"type": "string",
"pattern": "^\\d{4}-\\d{2}-\\d{2}$",
"description": "Only permits applied/issued on or after this date (YYYY-MM-DD)."
},
"types": {
"type": "array",
"items": {
"type": "string"
},
"description": "Case-insensitive substrings matched against each permit's type, e.g. ['electrical', 'mechanical']."
},
"license": {
"type": "string",
"description": "WA L&I contractor license number — same search by license. Use instead of query."
},
"contractor": {
"type": "string",
"description": "Contractor company name (substring) — returns what they have pulled across the MyBuildingPermit cities. Use instead of query."
}
},
"description": "Give `query` (address / parcel / permit number) OR `contractor` / `license` for a contractor pull-history search; never both."
}