WELCOME TO
HEDAHL
LANDSCAPE, DECK & PATIO

In Washington, tree rules are set by each city/county, and many jurisdictions require permits for removal or work on “exceptional,” “heritage,” or street trees. We check your local code before scheduling work and can coordinate documentation if a permit or arborist report is required.

• Seattle’s Tree Protection (SMC 25.11) & permits: Seattle SDCI – Tree Protection.
• Bellevue’s tree regulations & guidance: City of Bellevue – Trees.
• Urban & Community Forestry resources (statewide): WA DNR – Urban Forestry.

Water deeply but infrequently, adjusting for season and soil—typically early morning, with irrigation tuned to avoid runoff. We can set up smart controllers and hydrozones so lawns, shrubs, and beds each get the right amount.

• “Smart watering” & seasonal tips: Seattle Public Utilities – Watering.
• WSU Extension lawn/turf care: WSU Extension – Home Lawns.
• Irrigation scheduling fundamentals: WSU – Irrigation for Home Lawns (PDF).

For most projects, you’ll want a Washington-registered contractor with active bond/insurance, and pesticide licensing if herbicides or insecticides are applied. We maintain required registrations and can provide proof of coverage on request.

• Verify a WA contractor (bond/insurance/status): WA L&I – Verify a Contractor.
• Commercial pesticide applicator/operator licensing: WSDA – Licensing & Recertification.

Native and climate-adapted plants usually need less water and resist local pests, making them ideal for long-term performance. We’ll match species to your sun/soil and remove invasives that compete with new plantings.

• Native plant lists & guidance: King County – Native Plants.
• WSU Extension gardening hub: WSU Extension – Gardening.
• State noxious weed info & control: WA State Noxious Weed Control Board.

Yes—solutions may include re-grading, French drains, rain gardens, and erosion controls designed to local standards. Some locations require permits or a basic TESC (Temporary Erosion & Sediment Control) plan for earthwork.

• Stormwater BMPs (Western WA manual): WA Dept. of Ecology – Manual (PDF).
• King County permits & drainage guidance: King County – Permit Guide.
• Residential TESC template (example): King County – TESC Template (PDF).
• Rain gardens overview & how-to: City of Seattle – Rain Gardens.