Looking for an excavation contractor in Lake Oswego, OR? Describe your project once and up to three excavation contractors who work in Lake Oswego and Clackamas County get back to you with a quote. It's free and there is no obligation.
Lake Oswego is home to about 40,029 people (2024 Census Bureau estimate), a shrinking community (−2.0% since 2020). With 3,682 people per sq mi, it is a suburban area. New homes, additions and utility connections keep local excavation contractors busy.
Lake Oswego at a glance
- Population (Census Bureau estimate, 2024)
- 40,029 (−2.0% since 2020)
- Rank in Oregon
- 13th of 240 cities and towns
- Land area
- 11 sq mi
- Population density
- 3,682 people per sq mi (suburban)
- Type
- City (Lake Oswego city)
- Main county
- Clackamas County
What to check before hiring in Lake Oswego
- Call 811: required before digging, in Oregon as everywhere.
- Permits: grading, foundations and utility work may need permits from the city or county.
- Soil and rock: ask how unexpected rock or poor soil is priced.
- Price drivers: volume, depth, access, haul-off and backfill.
Useful official resources
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Call 811
Official information and guidance.
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OSHA: trenching and excavation
Official information and guidance.
Services available in Lake Oswego
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Foundation and basement excavation
Digging for a foundation, basement or addition, with backfill.
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Utility trenches and site work
Trenches for water, sewer and power, building pads, driveways and grading.
Frequently asked questions in Lake Oswego
How much does excavation cost in Lake Oswego, OR?
It depends on the volume, depth, soil and haul-off. Describe your project: contractors who serve Lake Oswego reply with a quote.
How long does it take?
A house foundation often takes a few days; larger site work longer.
Who hauls the dirt away?
Ask: haul-off and disposal are often priced separately.
Which excavation contractors will contact me?
Up to three independent excavation contractors who serve Lake Oswego 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.