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.

Insurance Restoration Contractor Kirkland, WA

Full-Service Insurance Restoration in Kirkland

Kirkland’s waterfront neighborhoods and tree-lined hillsides create a beautiful setting — but also increase exposure to wind damage, falling trees, and storm-driven water intrusion.

Prolific Design-Build and Restoration provides complete insurance restoration services to Kirkland homeowners — from emergency response and damage documentation to full repair and insurance claim closure. We handle storm damage, water damage, fire damage, roofing, siding, and mold remediation, all coordinated through your insurance company so you pay only your deductible.

Our Services in Kirkland

Prolific Design-Build and Restoration provides comprehensive insurance restoration services throughout Kirkland. Click below for detailed information about each service:

Our Kirkland Restoration Services

Storm Damage Restoration — Wind, hail, and fallen tree damage to roofs, siding, gutters, windows, and exteriors. We provide 24/7 emergency tarping and board-up followed by complete permanent restoration, all documented and coordinated through your insurance claim.

Water Damage Restoration — Emergency water extraction, structural drying, moisture mapping, and complete interior restoration for storm-driven water intrusion, burst pipes, and appliance failures. Fast action prevents mold — we respond immediately.

Fire Damage Restoration — Emergency board-up, structural assessment, smoke and soot cleaning, odor removal, water damage mitigation from firefighting, and complete structural rebuild. We manage the entire insurance claim process for fire damage.

Roof Insurance Claims — Expert documentation and repair for storm-damaged roofs. We inspect, photograph, and measure all damage, attend the adjuster meeting, file supplements when needed, and complete the repair with premium materials and manufacturer warranties.

Siding Repair & Replacement — Wind-torn, hail-dented, and storm-damaged siding repaired or replaced. We match existing styles and colors whenever possible and handle the complete insurance claim for covered damage.

Mold Remediation — Professional mold testing, containment, removal, and prevention following water damage events. We address both the mold and the moisture source to prevent recurrence.

Kirkland Weather and Storm Damage Patterns

Kirkland’s position on the eastern shore of Lake Washington means direct exposure to storms moving across the lake. Waterfront and hillside homes experience stronger wind effects, while dense tree coverage in neighborhoods like Finn Hill and Bridle Trails increases falling debris risk.

Wind damage and fallen tree damage are the most common insurance claims in Kirkland. The city’s mature tree canopy, while beautiful, poses significant risk during windstorms. Water damage from roof leaks after storms is the second most common claim, especially in older Juanita and Houghton homes.

How We Handle Insurance Claims in Kirkland

Our insurance claims process is the same whether you’re in Kirkland or anywhere in King County — thorough, professional, and designed to maximize your payout:

Free inspection and damage assessment — We inspect your property, identify all damage (including hidden damage), and create detailed documentation with professional photos and measurements.

Insurance claim filing assistance — We help you file the claim with complete, accurate documentation formatted for your specific insurance company.

Adjuster coordination — We meet your insurance adjuster on-site, walk the property together, and ensure every item of damage is identified and included in the estimate.

Supplement filing — If the initial estimate misses damage or underestimates repair costs, we file professional supplements with supporting documentation to secure full coverage.

Premium restoration — Once approved, we complete all repairs with quality materials and expert craftsmanship, returning your home to pre-damage condition.

Kirkland Neighborhoods We Serve

We provide insurance restoration services throughout Kirkland including Juanita, Finn Hill, Houghton, Totem Lake, Kingsgate, Norkirk, Market Street, Moss Bay, Rose Hill, and Bridle Trails. With a population of 92,000+ residents, Kirkland is one of King County’s most active markets for insurance restoration — and we’ve completed numerous projects across the city.

Get a Free Insurance Restoration Consultation in Kirkland

Call (425) 800-4775 for a free damage inspection and insurance claims consultation. We’ll assess the damage, explain your coverage options, and handle the entire restoration process from emergency response to final repair. Licensed, bonded, and insured in Washington State. You pay only your deductible — we handle everything else.

Helpful Resources

Other Service Areas

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

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