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.

Get a Free ADU Estimate (425) 800-4775
$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.

Tell Us What Happened — We'll Show You What's Possible
Insurance Claim? We Handle Everything.

Your Insurance Company Has Adjusters.
Now You Have Us.

STORM DAMAGE RESPONSEthousands more for homeowners just like you.

GET YOUR FREE CLAIM REVIEW → 📞 (425) 800-4775

Licensed & Insured · PROLISN776L6 · Serving All of King County

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Design & Remodeling Enumclaw WA

Restoration Enumclaw WA

Roofing & Restoration Services in Enumclaw, WA | Expert Contractor

Expert Roofing & Restoration Services in Enumclaw, Washington

We serve Enumclaw and the surrounding mountain communities with professional roofing, restoration, and exterior repair services. Enumclaw’s proximity to the Cascade Range, its elevation, and its exposure to severe weather patterns create specific challenges for property owners. We understand these challenges intimately because we live and work in this region. Our team has responded to countless emergencies in Enumclaw, managed complex insurance claims, and delivered quality restorations that protect properties and provide peace of mind.

Enumclaw’s unique mountain environment requires contractors with specialized knowledge of mountain property challenges—heavy snow loads, ice damming, exposure to severe wind and hail, and the ongoing battle with moisture and mold. We bring this expertise to every Enumclaw project. We’re experienced in selecting roofing materials and installation techniques suited to mountain weather, managing emergency responses in remote areas, and coordinating with insurance companies familiar with mountain property claims. When you need a contractor who understands Enumclaw, we’re the team to call.

Services Available in Enumclaw:

  • Roofing: Mountain-appropriate roof repair and replacement, snow load consideration, ice dam prevention
  • Insurance Restoration: Complete storm damage assessment and restoration services
  • Exterior Painting: Residential painting with weather-resistant products
  • Siding Services: Installation and repair of exterior materials
  • Concrete Work: Driveways, patios, and foundation services for mountain properties
  • Drywall Services: Installation and water damage restoration
  • Pressure Washing: Property cleaning and maintenance services

Why Enumclaw Property Owners Choose Prolific Design-Build and Restoration

We’re a trusted local contractor with deep experience in Enumclaw and mountain communities. We understand the specific challenges of your area and approach every project with expertise and dedication. We respond rapidly to emergencies, communicate clearly with property owners, work effectively with insurance companies, and deliver quality work that withstands mountain weather. We’re proud to serve the Enumclaw community and committed to building lasting relationships with property owners who trust us.

Enumclaw residents and property owners: Call or text (425) 800-4775 for expert roofing and restoration services. We’re available 24/7 for emergency mountain area damage. Request your free consultation and estimate online anytime.

Commitment to Excellence

At Prolific Design-Build and Restoration, our background in the industry, combined with our mission-driven approach, sets us apart. Our team of dedicated professionals brings extensive experience and a passion for excellence to every project. We prioritize client satisfaction and believe in transparent, collaborative relationships.

Free Estimate

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

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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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