Dow Engineering PLLC
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Forensic
  • Forensic Engineering
  • Code Violation Notices
  • Litigation Support
  • Structural Expert Witness
Structural
  • Structural Engineering
  • Site Visits
  • Wall Removal Beams
  • Additions Remodels
  • ADUs and DADUs
  • New Custom Homes
  • Foundations
  • Need a PE Stamp
Civil
  • Civil Engineering
  • Stormwater and LID
  • Erosion Control
  • Home Site Plans
  • Drainage and Grading
  • Utility Design
Dow Engineering PLLC
Home
Book Appointment
Contact Us
F.A.Q.
Forensic
  • Forensic Engineering
  • Code Violation Notices
  • Litigation Support
  • Structural Expert Witness
Structural
  • Structural Engineering
  • Site Visits
  • Wall Removal Beams
  • Additions Remodels
  • ADUs and DADUs
  • New Custom Homes
  • Foundations
  • Need a PE Stamp
Civil
  • Civil Engineering
  • Stormwater and LID
  • Erosion Control
  • Home Site Plans
  • Drainage and Grading
  • Utility Design
More
  • Home
  • Book Appointment
  • Contact Us
  • F.A.Q.
  • Forensic
    • Forensic Engineering
    • Code Violation Notices
    • Litigation Support
    • Structural Expert Witness
  • Structural
    • Structural Engineering
    • Site Visits
    • Wall Removal Beams
    • Additions Remodels
    • ADUs and DADUs
    • New Custom Homes
    • Foundations
    • Need a PE Stamp
  • Civil
    • Civil Engineering
    • Stormwater and LID
    • Erosion Control
    • Home Site Plans
    • Drainage and Grading
    • Utility Design

  • Home
  • Book Appointment
  • Contact Us
  • F.A.Q.
  • Forensic
    • Forensic Engineering
    • Code Violation Notices
    • Litigation Support
    • Structural Expert Witness
  • Structural
    • Structural Engineering
    • Site Visits
    • Wall Removal Beams
    • Additions Remodels
    • ADUs and DADUs
    • New Custom Homes
    • Foundations
    • Need a PE Stamp
  • Civil
    • Civil Engineering
    • Stormwater and LID
    • Erosion Control
    • Home Site Plans
    • Drainage and Grading
    • Utility Design

Drainage and Grading Plans for Homes

Water is the most common problem on home lots. It ponds by the foundation, runs into the crawlspace, or comes over from the neighbor's yard. Or the city wants a grading plan before you build.

Call Us

Fixing a wet yard or crawlspace

We visit, see where the water comes from and where it goes, and design a fix: regrading so the ground slopes away, footing and curtain drains, downspouts to a drywell, or swales around the house. You get a simple plan your contractor can build from.

Grading plans for permit

Many cities want a grading permit once you move enough dirt. The plan shows existing and new ground, cut and fill, slopes, small walls, and drainage. We build it from your survey, and tell you what to order if you don't have one.

Driveways and yard slopes

We check driveway grades and where a short wall works better than a slope. Big walls and steep hillsides need a geotech engineer, and we work from their report. A neighbor's water coming onto your lot? We can document it; see Forensic.

Water where it shouldn't be?

Call (253) 319-3220 or use Contact Us. Send your plans or photos. Defined work gets a clear fixed price; code and open-ended work starts with a short hourly agreement.

Call Us
  • Need a PE Stamp
  • Structural Engr Sumner
  • Pre-Purchase Assessment
  • Bearing Wall Removal
  • Stamped Plans for Permit
  • ADU Structural Engineer
  • Foundation Engineering
  • Home Addition Engineer

Dow Engineering PLLC

16202 64th St E Ste 117, Sumner, WA 98390

(253) 319-3220 · office@dowengineeringpllc.com

Copyright © 2026 Dow Engineering PLLC - All Rights Reserved.

Our family: Build Sherpas, WA Blower Door, MI Elements. Same office in Sumner.

Part of the Dow Engineering family, Sumner, WA

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