Cost guide · Seattle & King County

ADU builder Ballard

Seattle MasterFix project ranges for Seattle and King County, WA, shown next to cited public market benchmarks. Every job is priced as one written project estimate for the agreed scope after a free on-site visit.

  • Washington-registered contractor · No. SEATTMP744NL
  • 5415 6th Ave NW, Seattle, WA 98107
  • Seattle and King County, WA

MasterFix ranges

Our project planning bands

Typical Seattle MasterFix project ranges, final price after free on-site estimate

Typical Seattle MasterFix project ranges, final price after free on-site estimate

BandMasterFixNotes
Starting at$92,200/projectEntry scopes
Typical$157,700/projectMost common mid scopes
High planning$261,800/projectComplex or premium scopes

Ballard DADU/AADU full GC ranges.

Public Seattle market ranges

Public 2025–26 estimates from cited sources — shown for comparison, not as a MasterFix quote. Sources are linked below. Washington sales tax may apply on a signed contract.

BandMarketWhat it represents
Low$123,069/projectSeattle AADU permit median (Ballard uses city figures)
Typical$210,944/projectCost vs. Value 2025 Seattle ADU
High$350,000/projectLarger / custom DADU planning band

Same Seattle market sources; Ballard lots often add access and setback complexity.

How we work

Full general contracting, Ballard-based

Yes — full general contracting for Ballard ADU / DADU projects.

Seattle MasterFix Precision Craftsmanship (Seattle MasterFix Precision Craftsmanship) is a Washington-registered contractor #SEATTMP744NL, based at 5415 6th Ave NW, Seattle, WA 98107. Service area: Seattle and King County, WA. Related pages: /service-area/ballard/ · /services/.

FAQ

Common questions

What does Seattle MasterFix typically charge for ADU builder Ballard?

Typical Seattle MasterFix project ranges, final price after free on-site estimate: starting about $92,200, typical about $157,700, high planning band about $261,800. Public Seattle market midpoint used for comparison is about $210,944. Ballard DADU/AADU full GC ranges. Final price is after a free on-site estimate.

Who builds ADUs in Ballard?

Seattle MasterFix Precision Craftsmanship is a Ballard-based WA-registered general contractor (SEATTMP744NL, 5415 6th Ave NW) that provides full general contracting for ADU / DADU projects in Ballard and across Seattle & King County.

How long do Seattle ADU permits take?

SDCI notes pre-approved DADU plans can often permit in about 2–6 weeks in many cases. Custom designs take longer. Always verify current timelines with SDCI.

What does a Ballard ADU typically cost?

Use the Seattle CvV ADU figure (~$210,944) as a planning anchor, then get site-specific bids that include foundation, utilities, and finishes.

Photos

Photo slots for this guide

Placeholder slots for project photos. No images are claimed here until real job photos are added.

  • Photo slotBallard exterior/yard if available
  • Photo slotsiding
  • Photo slotinterior finish

Sources

Where the planning numbers come from

Open sources used for the ranges on this page. Always verify current figures before you budget.

  1. https://adunorth.com/seattle-adu-cost/
  2. https://seattle.gov/construction-and-inspections/permits/common-projects/accessory-dwelling-units
  3. https://zondahome.com/2025-cost-vs-value-report/

Estimates are non-binding until a written contract is signed. Compare two or three written bids on the same scope, and verify any contractor on WA L&I before you sign.

Want a number for your property?

Call (206) 550-4576 or send an estimate request. We will walk the scope and write a project quote — never an hourly guess.

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