Foundation repair in Stillwater, MN
Foundation inspections, crack and wall repair, and basement waterproofing for Stillwater homeowners.
Stillwater is two towns in one. A quarter of its homes were built before 1940, more than any other city we serve outside St. Paul. At the same time, half were built from 1980 on. A 1880s house on the North Hill and a 2005 house on the west edge of town have very different foundations and very different problems.
Share of homes by year built. U.S. Census Bureau, American Community Survey 2024 5-year estimates, table B25034. Wall types are typical for each era, not a rule.
The historic hills
Stillwater incorporated in 1854 and grew rich on the lumber trade. The mansions and worker cottages on the North Hill and South Hill date from that era. The William Sauntry House on the North Hill was built around 1881. Foundations from the 1800s and early 1900s are often stone, brick, or early block laid with soft lime mortar. After more than a century of freeze and thaw, that mortar crumbles and the walls let water through.
These foundations need repair methods that suit old masonry. Sealing a stone wall behind a finished basement or patching it with hard cement can trap water in the wall and make things worse. See the St. Paul page for more on old stone foundations.
The St. Croix and the bluffs
The St. Croix River reached its record crest at Stillwater of 94.10 feet on April 18, 1965, according to the Minnesota DNR and the Stillwater Public Library. The second-highest was 92.30 feet in April 2001. The river has come back to major flood stage since, including 2019 and 2023. For downtown and low-lying homes, high river levels mean high groundwater, and water can come up through basement floors even where the river never reaches the house.
Stillwater is also built into sandstone bluffs. The brewery caves under Main Street were dug into that bluff starting in the 1860s. Homes on and near the bluffs face steep grades, so runoff and erosion control matter. Work in a bluff impact zone can need a local permit under Minnesota DNR shoreland rules.
Permits and historic review
Stillwater's Building Inspections office at City Hall (216 4th St N) issues permits for structural changes and related work. Confirm your repair's permit needs with them. Exterior alterations in the Downtown Commercial Historic District need a design permit from the Heritage Preservation Commission. That district is commercial. For a historic home on the hills, ask the city whether your property is individually designated before planning exterior work.
Where to start
Old stone or block wall leaking or crumbling? See waterproofing and bowing walls. Newer home with a crack? Use the crack guide.
Sources
- U.S. Census Bureau, ACS 2024 5-year estimates, table B25034 (Stillwater city).
- Minnesota DNR, “Remembering the 1965 Floods”; Stillwater Public Library, 1965 flood history.
- Stillwater Gazette on St. Croix flood crests; Star Tribune (2019) and St. Croix 360 (2023) flood coverage.
- St. Croix Valley Magazine, Joseph Wolf Brewery caves.
- Minnesota DNR, shoreland bluff standards.
- City of Stillwater, Building Inspections, Heritage Preservation design review, and historic districts information.
Services in Stillwater
Nearby areas
St. Paul, Woodbury, Maplewood, Oakdale, Cottage Grove, West St. Paul, North St. Paul, Lake Elmo