ADU & DADU Contractor — King County, WA

Add a Legal Dwelling Unit
to Your King County Property

From permit application to final walkthrough — Prolific handles design-build ADU and DADU projects across Federal Way, Issaquah, Renton, Kent, and greater King County.

$180KAverage ADU Cost (King County)
6–12moTypical Timeline Permit to Move-In
$1,800+Monthly Rental Income Potential
3–5yrAverage ROI Payback Period

What We Build

Every ADU project is custom-designed for your lot, your goals, and King County code.

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Detached ADU (DADU)

A standalone dwelling in your backyard. Most flexible for rental or multigenerational living. Requires setback compliance and separate utility connections.

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Attached ADU

Connected to the primary home via a shared wall. Lower cost than detached, faster permitting. Ideal for in-law suites or long-term rental income.

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Junior ADU (JADU)

Converted from existing interior space — garage, basement, or bonus room. Lowest cost entry point. Limited to 500 sq ft per King County code.

The King County Permitting Process

Prolific handles every step. Most homeowners have never pulled a permit — we've done hundreds.

1

Site & Zoning Review

We verify your parcel's zoning, setbacks, lot coverage, and utility capacity before design starts. Catches 80% of project-killers on day one.

2

Design & Engineering

Architectural plans drawn to King County standards. Structural engineering included where required. Typical design phase: 3–6 weeks.

3

Permit Submission

We submit to King County DPER or the applicable city (Federal Way, Renton, Issaquah, Kent). Electronic submission with full plan set.

4

Review & Corrections

County review typically takes 6–12 weeks. We respond to all correction requests and manage the back-and-forth until permit issuance.

5

Build & Final Inspection

Construction with milestone inspections. Final inspection and certificate of occupancy required before the unit can be rented or occupied.

Cost Ranges for King County ADUs

Rough estimates — every project varies by site, size, and finish level. Free estimate available after a site visit.

ADU TypeSize RangeTypical Cost Range
Junior ADU (JADU)Up to 500 sq ft$60,000 – $120,000
Attached ADU400–800 sq ft$120,000 – $200,000
Detached ADU (DADU)400–1,200 sq ft$160,000 – $320,000

Ready to Add a Unit to Your Property?

Free site consultation. We'll tell you what's possible on your lot before you spend a dollar.

Get Your Free ADU Estimate

Prolific's Differentiator

While We're Restoring Your Home, Let's Make It Better Than Before

Most contractors patch the damage and leave. We use the restoration as a launchpad — pairing insurance coverage with a remodel that upgrades what you had.

Storm + Remodel

Federal Way — Hail Damage + Kitchen Upgrade

Insurance covered the roof and siding. While we had the crew on-site, the homeowners financed a kitchen remodel they'd been putting off for years. One mobilization, two wins.

Water + Addition

Renton — Burst Pipe + Primary Bath Expansion

A burst pipe triggered an insurance claim for the subfloor and drywall. We rebuilt the bathroom larger than it was — same timeline, carrier paid the base, owner paid the delta.

Fire + Rebuild

Issaquah — Garage Fire + ADU Conversion

Garage total loss became a permitted two-car garage with a studio ADU above. Insurance rebuilt what burned. The ADU now generates rental income to offset the mortgage.

Insurance Claim? We Handle Everything.

Your Insurance Company Has Adjusters.
Now You Have Us.

STORM DAMAGE RESPONSEthousands more for homeowners just like you.

Siding Replacement & Insurance Claims | King County WA

Siding Replacement & Insurance Claims in King County, Washington

Storm damage to your home’s siding can leave your property exposed to water infiltration and long-term deterioration. Prolific Design-Build and Restoration specializes in siding damage assessment, insurance claim documentation, and complete siding replacement throughout King County.

Does Insurance Cover Siding Damage?

Most homeowners’ insurance policies cover sudden, accidental siding damage caused by weather events. Hail Damage — impact damage weakens material and allows water infiltration, generally covered. Wind Damage — high winds lift or bend siding panels, typically covered. Impact Damage — tree branches and debris during storms, usually covered as long as it’s sudden and accidental.

Bundling Roofing and Siding on One Claim

A single hail storm or severe wind event can damage both your roof and your siding simultaneously. Filing one comprehensive claim covering all damage often results in larger settlement amounts. One adjuster visit covers both, one contractor provides one damage assessment, and repairs are coordinated efficiently. When you contact us, we assess your entire home—roof, siding, gutters, fascia, and exterior—and provide a comprehensive damage report.

Siding Materials We Install

Fiber Cement Siding (James Hardie): Superior durability, excellent weather resistance, lasts 25–30 years.
Vinyl Siding: Cost-effective, low maintenance, 20–25 year lifespan.
Wood Siding: For homes maintaining original aesthetic with proper finishing and maintenance.

Get a Free Estimate Today

If your siding has been damaged by a storm, don’t delay. Call us at (425) 800-4775 or contact us for a free damage assessment.

Siding Insurance Claims — Storm & Hail Damage Siding Repair in King County

Damaged siding isn’t just an eyesore — it compromises your home’s weatherproofing, insulation, and structural integrity. When your siding is damaged by storms, hail, wind, or fallen debris, your homeowners insurance typically covers the repair or replacement. Prolific Design-Build and Restoration handles the entire process — from damage documentation to insurance claim filing to professional installation.

Types of Siding Damage Covered by Insurance

  • Hail damage — Dents, cracks, and chips in vinyl, fiber cement, and wood siding from hailstones
  • Wind damage — Torn, loose, or missing siding panels blown off by high winds
  • Impact damage — Holes and cracks from flying debris, fallen branches, or fallen trees during storms
  • Water damage — Warping, rot, and deterioration from water intrusion behind damaged siding
  • Fire and smoke damage — Melted, discolored, or structurally compromised siding from fire exposure

We Work With All Siding Types

We repair and replace all common siding materials used in King County homes including vinyl siding, fiber cement (HardiePlank), LP SmartSide, cedar and wood siding, and engineered wood products. When insurance covers your claim, we match your existing siding style, color, and profile as closely as possible. If matching is unavailable due to discontinued products, insurance typically covers replacement of the entire affected wall or section for a consistent appearance.

How We Handle Your Siding Insurance Claim

Siding damage is often undervalued by insurance adjusters because much of it isn’t obvious from a distance. Our inspectors examine your siding up close, documenting every dent, crack, hole, and area of water intrusion. We photograph damage patterns, measure affected areas, and create a detailed scope of work that accurately represents the full repair needed.

We then coordinate with your insurance adjuster, attend the on-site inspection, and file supplements if the initial approval doesn’t cover the full scope. Many of our clients receive higher siding damage payouts than they expected because our documentation captures damage that others miss.

When Does Insurance Cover Siding Replacement vs. Repair?

Insurance companies generally cover siding replacement when the damage is extensive enough that repair won’t restore the siding to pre-damage condition, or when matching replacement panels aren’t available. We advocate for replacement when it’s warranted and help you understand your coverage options.

Serving King County

We provide siding insurance claim services throughout King County including Issaquah, Bellevue, Renton, Sammamish, Kirkland, Redmond, Kent, Auburn, Federal Way, Maple Valley, Covington, Enumclaw, and Black Diamond.

Free Siding Damage Inspection

Call (425) 800-4775 for a free siding inspection and insurance claims consultation. We’ll document the damage, explain your coverage, and handle the claim from start to finish. You pay only your deductible.

Dealing with storm damage? We're here — call now or submit your info and we'll call you within the hour.

We Got Your Request

We respond within 2 business hours — same day for emergencies.

A member of our team will reach out shortly to schedule your free estimate or inspection. Here's what to have ready when we call:

What to Have Ready

  • Photos of the damage or area of concern (phone photos are fine)
  • Your insurance carrier name and claim number (if applicable)
  • Best time and number to reach you
  • A rough idea of when the damage occurred or project timeline
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Prolific Design-Build & Restoration — Federal Way, WA

📋 Get a Free Estimate