Concrete Driveways & Sidewalks in Issaquah, WA

Driveways & sidewalks in Issaquah: what to know

A driveway job here is measured by what it adds. The city’s drainage report threshold is 2,000 square feet of impervious surface added or replaced, and a new drive, walk, and pad poured together can reach it. Sight lines count as well: the city’s site work checklist asks for sight-distance triangles at driveways, corners, and street intersections.

Slope and water set the other limits. The Land Use Code has a Forested Hillside Preservation chapter with sections on hillside streets and access and on grading, so a steep driveway cut can turn into a grading question. Down on the valley floor, the question is whether the parcel falls inside the mapped 100-year floodplain.

Permits and rules in Issaquah

Community Planning and Development issues Issaquah’s permits, mostly through MyBuildingPermit.com. Work in the street right-of-way, sidewalk patching included, is a separate Right-of-Way permit with a site plan, a traffic control plan, and drawings certified by a professional engineer. Clearing and grading falls under the Site Work permit. We look up with the Permit Center whether either one applies to your driveway and apron before we quote.

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

How we approach it

Mark the property line and sidewalk edge before laying out the apron
Total new and replaced paving against the city’s 2,000 square foot report trigger
Look up the parcel on King County’s 100-year floodplain layer before forming
Stake hillside driveway grades and cuts first, since steep cuts can mean grading rules

For the full process, see our Concrete Driveways & Sidewalks page.

Building in the cold months? See our guide to winter concrete pours.

Our driveways & sidewalks work, serving Issaquah

Examples of our work. We build driveways & sidewalks in Issaquah and the cities around it. See all of our work

Questions from Issaquah homeowners

Does replacing my Issaquah driveway apron need a right-of-way permit?

Work in the street right-of-way, sidewalk patching included, goes through Issaquah’s Right-of-Way permit, which asks for a site plan, a traffic control plan, and engineer-certified drawings. Whether a like-for-like apron counts is a question for the Permit Center, so we ask before pricing.

At what size does Issaquah want a stormwater report for new paving?

The city’s Site Work checklist calls for a Stormwater Drainage Technical Information Report on projects that add or replace 2,000 square feet or more of impervious surface. Drive, walk, and patio area add up, so we total them before drawing anything.

Is my Issaquah driveway inside a floodplain?

Maybe. The city says flood maps often cannot show whether a specific property is in the floodplain, and it points owners to King County’s iMAP 100-year layer. Construction inside the floodplain needs a separate Flood Hazard Permit, so we look before forming.