Typical cost in Seattle
Water behaving badly around a house shows up as damp crawlspaces, wet basement walls, mushy slopes or drains that no longer drain. Seattle Top Foundation Repair starts by finding where that water enters the picture, and chooses the remedy only after.
Seattle, Bryn Mawr-Skyway and White Center are the places we serve. Drainage on a house of any age may have aged or been altered, so testing what still functions is part of the visit.
Surface water comes first. If soil pitches toward the house, gutters overflow or a downspout ends at the wall, the foundation takes the runoff. HUD’s rehab guide leads its drainage advice the same way: grade the ground so surface water is led away from buildings.
Gravel at footing level around a perforated pipe on the outside of the foundation intercepts water and conveys it off. Digging along the wall is required to reach the footing, so working room is part of the price.
Water already at the wall can be caught from the dry side: a drain runs along the foot of the basement or crawlspace wall and a sump basin holds what it collects for removal.
University of Minnesota Extension names three causes of wet basements. One is ground that fails to slope away from the house; another is weak gutters and downspouts; the third is subsurface drainage that is missing or has failed.
HUD adds a structural angle. Standing water can flush fine particles from beneath a footing and push on the wall, so persistent damp can be a settlement and cracking matter, not just a wetness one.
HUD cautions that existing footing drains may be too small or not working. To test an old one, trace where it discharges and, if required, send a camera through it; it may be blocked or crushed.
Choosing between the two comes down to the wall, the access and where the water originates. Outside means excavating but treats water at the footing; inside avoids excavation and manages what has reached the wall.
Low-cost checks come ahead of any digging: gutters cleared, downspouts lengthened, soil confirmed to fall away from the walls. On a sloped lot, follow the water past the downspout to see where it ends up.
A downspout may connect to an old underground line. We trace where it goes before adding more water to it.
SDCI’s permit pages require a pre-application site visit for anyone disturbing more than 750 square feet of land, or any land on a site with an ECA. A trench around a foundation disturbs land, so a drain job on an ECA lot should be raised with SDCI before digging.
They also say foundation alterations in a steep slope area, or within 15 feet of the upper or lower edge of one, need an exemption, relief or small project waiver approved before the permit application, or a land use permit. Whether a footing drain counts as a foundation alteration is SDCI’s call. Ground cover and moisture inside the space are covered on the crawlspace page.
Drainage is priced from the system. The drivers:
Water lying beside the wall after rain, a crawlspace with moisture on the ground or a wall that stays damp are the cues. Tracing the source comes before any drain is recommended.
Both can be right. The outside drain works at the footing but needs excavation; the inside one is installed from the dry side. Access and the water’s source pick the winner.
No: a drain deals with water, which HUD connects to settlement and wall loading, but a crack already formed stays where it is. Foundation crack repair covers those.
Soil softened beneath the footing is foundation settlement and piering territory, while damp timber higher up is crawlspace post and beam repair. The home page lists all five services.
Crawlspace, basement wall or yard: where is the water? We'll get back to you soon with an estimate or any questions we have. Estimates are free and there's no obligation.
Call (206) 717-8636