Looking for a wetland delineation in Sedro-Woolley, WA? Describe your project once and up to three wetland consultants who work in Sedro-Woolley and Skagit County get back to you with a quote. It's free and there is no obligation.
Sedro-Woolley is home to about 13,215 people (2024 Census Bureau estimate), a growing community (+6.3% since 2020). With 3,040 people per sq mi, it is a suburban area. Low-lying lots, stream corridors and former farmland can hold wetlands that must be mapped before building.
Sedro-Woolley at a glance
- Population (Census Bureau estimate, 2024)
- 13,215 (+6.3% since 2020)
- Rank in Washington
- 76th of 281 cities and towns
- Land area
- 4.3 sq mi
- Population density
- 3,040 people per sq mi (suburban)
- Type
- City (Sedro-Woolley city)
- Main county
- Skagit County
What to check before hiring in Sedro-Woolley
- Rules: in Washington, wetlands can be regulated by the Corps of Engineers, the state and the county, each with its own rules and buffers.
- Season: some indicators are only reliable in the growing season; ask the consultant when to schedule.
- Survey: the delineated boundary is usually located by a land surveyor for the site plan.
- Price drivers: site size, vegetation, access and whether permitting is included.
Useful official resources
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EPA: Section 404
The federal wetland permit program.
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U.S. Army Corps of Engineers
Regulatory program and district offices.
Services available in Sedro-Woolley
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Wetland delineation
Field delineation of wetland boundaries following the Corps of Engineers manual, with flags and a report.
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Wetland permitting support
Jurisdictional determination and permit application (Section 404, state or local) for work near wetlands.
Frequently asked questions in Sedro-Woolley
How much does a wetland delineation cost in Sedro-Woolley, WA?
It depends on the size of the site, the vegetation and the report required. Describe your land: consultants who serve Sedro-Woolley send a proposal.
How long does it take?
Field work often takes a day or two; agency review of a jurisdictional determination can take months.
Can I build if there is a wetland?
Often yes, by avoiding it or obtaining the required permits and mitigation.
Which wetland consultants will contact me?
Up to three independent wetland consultants who serve Sedro-Woolley and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.