Seattle Gutter Cost Calculator
Estimate new 2026 Seattle gutters: 5- or 6-inch seamless aluminum gutters, downspouts, micro-mesh gutter guards and taking the old gutters down. Enter the linear feet, and the calculator totals the installed prices. 150 ft of 5-inch seamless gutters with four downspouts, including taking down the old gutters, comes to about $1,544.
Re-siding or repainting at the same time? Run the siding calculator or the exterior painting calculator. For a firm number, request a quote.
Your Estimate
Pick what you need and click Calculate
Each item shows its installed price per unit
What this calculator captures
Installed prices from this calculator for 150 ft of gutter. Taking down the old gutters is priced in the calculator above.
- 5-inch seamless
- About $1,283
- 6-inch seamless
- About $1,568
- 5-inch with downspouts and guards
- About $2,043
K-style seamless aluminum gutters formed on site and hung, about $8.55 per ft.
Oversized K-style seamless aluminum gutters, about $10.45 per ft.
Four downspouts at about $47.50 each, and micro-mesh guards over the full run at about $3.80 per ft.
Using this calculator
What does each price include?
The 5-inch and 6-inch prices are per foot for K-style seamless aluminum gutters formed on site and hung. Downspouts are priced each, run from the gutter to the ground. Micro-mesh guards are priced per foot, fitted over the gutters. Taking down the old gutters is priced per foot, at about $0.48.
Is there a job minimum?
Yes, $855. When a job totals less, the difference is added as its own Mobilization & Job Minimum line, so the line items still add up to the total. 150 ft of 5-inch seamless gutters ($1,283) clears it; 60 ft ($513) prices at $855.
What do downspouts and guards add?
Downspouts are about $47.50 each, and micro-mesh guards about $3.80 per foot. 150 ft of 5-inch seamless gutters with four downspouts and guards over the full run comes to about $2,043.
How are these prices set?
Each item's price is set against the lowest installed price that registered Seattle-area contractors publish on their own websites for the same scope, dated 2025 or 2026, at about 95% of it. Lead-generation and pricing-template sites never set a price, and neither do Kolmo's own quotes. The full method is at /how-estimates-work.
What doesn't the calculator price yet?
This calculator prices new gutters, downspouts and guards. Repairs to the fascia board behind the gutters are not in it; they are quoted after a walkthrough.
Keep planning
Continue the planning once you have a number.