Concrete Sidewalk Installation in Seattle
Concrete sidewalks and walkways are among the highest-traffic surfaces on a residential property. A cracked, heaving, or narrow walk creates daily trip hazards and signals deferred maintenance to buyers and city inspectors. We install private walkways and coordinate public right-of-way sidewalk replacement through SDOT — managing permits, inspections, and ADA requirements from the first call to final sign-off.
Private walkways on your property
Front entry paths, side-yard access corridors, garden walks, and driveway connections fall under your direct control — no city permit required in most cases. Standard residential walkway width is 36–48 inches; main entry paths benefit from 48–60 inches for comfortable two-way passage and ADA friendliness. We prep a 4-inch compacted gravel base, pour 4-inch concrete (6 inches at vehicle crossing points), and finish to your choice of texture. Broom finish is the most common; exposed aggregate is popular in shaded back-yard paths where algae buildup is a concern.
Public sidewalk replacement (right-of-way work)
Seattle homeowners are legally responsible for maintaining the public sidewalk panel adjacent to their property. When a panel needs replacement, we file the SDOT Street Use permit, coordinate inspection holds, pour to SDOT standard specifications (4 inches of concrete over 4 inches of compacted base), and submit as-built documentation. Work must meet a 2% maximum cross-slope and 5% maximum running slope for ADA compliance. If the replacement triggers a curb ramp upgrade at an adjacent intersection, we design and include it in the same scope.
Repair vs. full panel replacement
Panel grinding removes concrete at control joints to eliminate a trip hazard without a new pour — fastest and least disruptive. Cost: $200–$400 per joint. Appropriate when the offset is less than 1.5 inches and the panel is otherwise intact. Partial replacement cuts out the damaged section; good when damage is isolated to one area. Full panel replacement is best when the panel is heaved, badly cracked, or more than 1 inch out of plane with adjacent panels — grinding a panel that badly is a temporary fix.
Slope and drainage
All walkways slope 2% away from structures and toward the yard or street drainage. Seattle’s rainfall makes this more critical than in drier climates — pooling on a walkway leads to algae growth and icing in cold snaps. We check that each section of a long path maintains positive drainage even when the grade changes along the route. Where the ground pitches toward the house, we add a channel drain at the base of the walk to intercept runoff.
Finish options for Seattle conditions
Broom finish is the standard for public right-of-way work and most private walkways: slip-resistant, code-compliant, and the lowest cost option ($10–$16/sqft installed). Exposed aggregate is popular for private garden paths where aesthetics matter and the surface stays wet under tree cover. Stamped finishes work on covered or partially covered entry paths; a non-slip sealer is required on any stamped surface where traction is safety-critical.
Frequently asked questions
Do I need a permit to replace a sidewalk in Seattle?
For private walkways on your property: usually no. For any work in the public right-of-way (from the property line to the street): yes, an SDOT Street Use permit is required. We handle the application, inspection scheduling, and as-built documentation.
How much does sidewalk replacement cost in Seattle?
Right-of-way panel replacement: $18–$28/sqft including permit coordination, demolition, and new pour. Private walkways on your property: $10–$18/sqft depending on finish, site access, and whether a new base is needed.
Am I responsible for the sidewalk in front of my house?
Yes. Seattle Municipal Code 15.72 requires property owners to maintain adjacent public sidewalk panels in safe condition. A heaved or broken panel can result in a Notice of Violation from the city. We handle the repair before it becomes a liability.
How long does sidewalk replacement take?
A typical 3–5 panel section takes one to two days for demolition and new pour. The sidewalk is walkable in 3–4 days and reaches full strength at 28 days.
What causes sidewalks to heave in Seattle?
Tree root intrusion is the most common cause in Seattle neighborhoods. Roots lift panels from below over years. The fix is root pruning combined with panel replacement, sometimes with a root barrier installed under the new slab if the tree is close to the pavement.
Related Services
Related Articles
