Basement Waterproofing in Lynnwood, WA

Basement waterproofing in Lynnwood: what to know

Water that reaches a foundation tends to enter at a joint or along the footing. We trace the wet area over several weeks, check the downspout discharge at each corner, and read the grade against the wall. LMC 13.45.040 allows foundation and footing drains and clean crawl-space pump water into the storm system unless the director finds a pollution risk, so the outlet is planned around that list.

A dig beside the foundation is a grading question first. The Public Works checklist starts a grading permit for a cut deeper than two feet or a cut slope steeper than 1.5 to 1, and it asks for a drainage plan with no impact on adjacent properties. A connection that opens the public right-of-way falls under LMC 12.04.040, so it is confirmed with the counter before any trench is cut.

Permits and rules in Lynnwood

Before quoting, we check whether the excavation crosses the grading triggers and whether any discharge reaches public ground. We confirm both answers with Lynnwood staff, log each reply on the parcel file, and hold the dig until they are in. Any discharge that LMC 13.45.040 does not name goes to the counter for a ruling before a line is laid.

Rules change and vary by parcel, so we confirm the current requirements with the city before we start.

How we approach it

Trace the wet area across several weeks before any repair
Check downspouts and grade at each corner of the foundation
Reset the footing drain so its outlet carries the flow away
Confirm excavation and discharge answers before booking the dig

For the full process, see our Basement Waterproofing page.

Our basement waterproofing work, serving Lynnwood

Examples of our work. We build basement waterproofing in Lynnwood and the cities around it. See all of our work

Questions from Lynnwood homeowners

What does LMC 13.45.040 allow a Lynnwood footing drain to discharge?

It names foundation and footing drains and clean crawl-space pump water among the discharges allowed into the storm system, unless the director finds a pollution risk. Discharges the list does not name go to the counter for a ruling.

What grading numbers does a Lynnwood foundation dig get checked against?

A cut deeper than two feet, or a cut slope steeper than 1.5 to 1, starts a grading permit under the city’s checklist. The dig is measured against those numbers before the crew is scheduled, and the counter confirms the answer for the address.

How do we find where a damp Lynnwood basement is getting water?

We trace the wet line over several weeks and read the downspouts and the grade at each corner, then pick the repair that matches where the water enters. A repair chosen before that reading can treat the wrong wall.