Is an in-ground sprinkler system worth it in Seattle?

Yes, and for a reason that surprises people: Seattle summers are dry. Most of the region's rain falls October through spring, while July and August routinely bring weeks with little rainfall — exactly when lawns and plantings need water most. A zoned in-ground system with a smart controller waters precisely during the dry season and stays off the rest of the year.

What is a smart irrigation controller and is it worth it?

A smart controller adjusts watering automatically based on weather and season instead of running a fixed schedule — skipping cycles when it rains and scaling back in cool weather. It typically pays for itself in water savings and healthier plants, and it removes the most common irrigation failure: a controller programmed once in July and never touched again.

Do irrigation systems in Washington require backflow prevention?

Yes. Irrigation systems connected to drinking water require a backflow prevention assembly to protect the potable supply, and Washington water purveyors require these assemblies to be tested periodically by a certified tester. Every system we install includes a code-appropriate backflow assembly, installed accessibly for testing.

What is winterization and does a Seattle-area system need it?

Winterization means removing water from the irrigation lines before freezing weather so pipes, valves, and backflow assemblies don't crack. Western Washington freezes are mild but real, and systems here should be winterized. We design systems with proper drain-down and blowout points so seasonal shutdown is quick and complete.

Can drip irrigation and lawn sprinklers be combined in one system?

Yes — and they should be separate zones of the same system. Lawns want spray or rotor heads with matched coverage; planting beds want low-volume drip at the roots. Zoning them separately lets each get the right amount of water on the right schedule from one controller.

How much does an irrigation system cost in the Seattle area?

Cost is driven by irrigated area, zone count, head types, controller selection, backflow assembly requirements, trenching access, and whether the system is installed alongside new sod or landscape. All Pro Landscaping provides clear scope and cost expectations after a site evaluation.

In-Ground Irrigation & Sprinkler System Installation in the Seattle Area

All Pro Landscaping & Construction Services LLC designs and installs below-ground irrigation systems across King & Snohomish County — zoned for how your property actually grows, controlled by weather-smart technology, and built with the backflow protection and winterization points a Washington system needs.

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✓ Zoned design — lawn, beds, drip separated ✓ Smart weather-based controllers ✓ Backflow protection & winterization built in

Seattle needs irrigation for a reason most people miss: our summers are dry. The region’s rain falls mostly October through spring, while July and August routinely go weeks with little rainfall — precisely when lawns and plantings need water most. A zoned in-ground system with a smart controller waters exactly then, and stays quiet the other nine months.

Irrigation Systems We Install

Lawn Sprinkler Zones

Spray and rotor heads laid out for head-to-head coverage — the design standard that eliminates the dry crescents and soggy overlaps of guessed layouts.

Drip Irrigation for Beds

Low-volume drip delivering water at the roots of trees, shrubs, and planting beds — less evaporation, no wet foliage, and separate scheduling from the lawn.

Smart Controllers

Weather-based controllers that skip cycles when it rains and scale with the season — replacing the classic failure of a schedule programmed once in July and never touched again.

Backflow Protection

Every potable-connected system includes a code-appropriate backflow prevention assembly, installed accessibly — Washington water purveyors require these assemblies and periodic testing by a certified tester.

Winterization-Ready Design

Drain-down and blowout points designed in, so seasonal shutdown before freezing weather is quick and complete — the difference between a spring startup and a spring repair bill.

Commercial & Multi-Family Systems

Zone-optimized irrigation for apartment communities, commercial sites, and campuses — as standalone scopes or part of complete site construction.

Best Installed Together: Irrigation + Sod

The cheapest time to install irrigation is before the lawn goes down. Trenching through an established lawn means repair; trenching graded bare soil means nothing to repair at all. When a project includes new sod, we install the irrigation system first, then lay the lawn over it — one scope, one mobilization, and a lawn that establishes with perfect watering from day one.

Planning new sod or a landscape refresh too?

Bundling irrigation with sod or landscape work is the highest-value order of operations. Tell us the full picture.

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Our Irrigation Installation Process

Site & water evaluation — Water pressure and flow, irrigated areas, sun and shade zones, planting types, and point of connection.
Zoned system design — Lawn, beds, and drip separated into zones sized to your actual flow — so every zone gets full pressure and even coverage.
Trenching & piping — Below-ground lines, valve manifolds, and wiring installed with clean trenching — coordinated with sod or landscape work when part of a larger scope.
Backflow, controller & heads — Backflow assembly set accessibly, smart controller configured for your zones, heads adjusted for head-to-head coverage.
Walkthrough & handoff — Zone-by-zone demonstration, seasonal scheduling guidance, and winterization points shown. Install-only: you get a finished, documented system.

What Determines Irrigation System Cost

Irrigated area and zone count — flow rate decides how many zones your property needs
Head types and drip scope
Controller selection — standard vs. smart weather-based
Backflow assembly requirements for your water purveyor
Trenching access — bare graded soil vs. established lawn
Bundling — installed with sod or landscape work, priced as one scope

Irrigation Questions, Answered Straight

Is a sprinkler system worth it in rainy Seattle?

Yes — because our summers are dry. Rain falls mostly October–spring; July and August routinely go weeks with little rainfall, exactly when the lawn needs water. The system earns its keep in those two months and rests the other ten.

What’s a smart controller worth?

It waters by weather instead of by habit — skipping rain days, scaling with the season, and typically paying for itself in water savings and plant health.

Do I need backflow prevention?

Yes — required for potable-connected systems, with periodic testing by a certified tester per Washington water purveyor rules. Every system we install includes a code-appropriate assembly, set accessibly.

Does a Seattle-area system need winterizing?

Yes. Our freezes are mild but real enough to crack pipes and backflow assemblies. We design drain-down and blowout points in, so seasonal shutdown is quick.

Sprinklers and drip in one system?

Yes — as separate zones of the same system. Lawn gets matched-coverage heads; beds get root-level drip; one controller runs both on the right schedules.

What does a system cost?

Area, zones, heads, controller, backflow, and access decide it — and bundling with sod or landscape work is the best value. Clear scope and cost at consultation.

Water the Two Months That Matter — Automatically

Zoned, smart-controlled, code-correct irrigation for the Puget Sound dry season. (425) 329-5683

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Related Services

Irrigation frequently combines with:

Sod Installation (irrigation first, lawn second) · Landscape Installation · Drainage Solutions · Full Backyard Remodels