Services /
Fixed-fee · Approval guaranteedResidential Stormwater Drainage Design
Our fixed-fee Residential Stormwater Drainage Design program covers everything needed to support permit approval — one up-front price, every jurisdictional revision included until the design is approved. Homeowners and builders can budget confidently with no surprise billing.
What we design & deliver.
- Site plan and grading review
- Stormwater drainage plan tailored to your county or city
- Cost estimate / Best Management Practices for installation
- Erosion control plan (SWPPP) for your building permit
- Land disturbance permit support
- Everything needed to support permit approval
Fixed fee. All jurisdictional revisions included until approved.
One up-front fee covers the drainage plan and every revision the jurisdiction requires until it's approved. Typical turnaround: 2–4 weeks after site info received.
If you're a homeowner
You usually arrive here because a permit counter asked for a drainage plan for an addition, a shop, an ADU, or a new house, and nothing in that request explains what to do next. Send the parcel number and what you're building; we tell you whether an engineered plan is actually required before anyone spends money on design.
If you're a builder
The drainage sheet is usually the item holding up the building permit. A fixed fee with revisions included means the line item does not move once it is in the budget, and the same engineer answers the review comments rather than handing them back to you.
If you're a contractor or excavator
We produce the erosion-control and grading sheets the inspector expects, plus Best Management Practices for installation, so what is drawn on paper matches what your crew can actually build in the field.
Written for the county reviewing it
Whatcom and Skagit counters use the language of land disturbance and fill and grade; Snohomish County works in LDA permits and drainage. The same site produces a different submittal depending on the counter, and we format it for the one that will read it.
Often paired with.
Core service
Civil Engineering & Stormwater Design
Site plans, grading, utilities, and drainage design for classic civil engineering projects including commercial & multifamily developments, short plats & large subdivisions.
End-to-end
Land Use Permitting & Project Management
Design, plan, and manage your project from conceptual planning through final construction — backed by deep working relationships with local, state, and federal jurisdictions.
Match the work to the jurisdiction.
Searchers often arrive with a city, county, or permit letter in hand. These pages route them to the most specific drainage, stormwater, or subdivision guidance we have published.
Residential Stormwater Design — Whatcom County
See the local review path, common triggers, and proposal next step.
Residential Drainage Design — Snohomish County
See the local review path, common triggers, and proposal next step.
Drainage Design — Arlington
See the local review path, common triggers, and proposal next step.
Schedule a call today.
Whether you're planning a subdivision, a single-family home, a commercial site, or just trying to figure out what's feasible — we're happy to talk it through.