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REF_4822 · Garage Conversion · Edmonds, WA

Edmonds Craftsman Conversion

1940s detached garage converted to a fully code-compliant AADU with separate water/electric — Edmonds Bowl, walking distance to ferry.

Type
Garage Conversion
Sqft
540
Beds / Baths
1 / 1
Completed
Aug 2024
Duration
22 wks
Budget
$189,000
Edmonds Craftsman Conversion — Garage Conversion in Edmonds, WA

01 / BRIEF

What the owner asked for

Owners wanted long-term rental income within a 5-minute walk of the Edmonds-Kingston ferry. Edmonds ECDC 20.21 permits one DADU per lot if existing structure meets fire separation.

02 / CHALLENGE

What stood in the way

Original garage slab was 3" thick with no rebar — insufficient for habitable structural code. Slab also sat 8" above grade with no perimeter foundation drain.

03 / APPROACH

How we solved it

Removed existing slab, dug a new 18" footing, poured a 5" rebar-reinforced slab with PEX radiant tubing. Tied to a new perimeter drain and connected to existing storm.

04 / OUTCOME

What got delivered

Permitted as a full DADU rebuild on existing footprint (no setback variance needed). Owner achieved $2,200/month rent within 3 weeks.

SPEC_05 / FACTS

Project specification

Footprint
540 sqft single-story
Bedrooms / baths
1 / 1
Re-build classification
Full demo + new construction on footprint

SCHEDULE_06 / PHASES

22-week delivery

  1. 01
    Feasibility & design
    4–6 wks

    Site survey, zoning memo, schematic plans, owner review.

  2. 02
    Construction docs
    3–4 wks

    Structural, MEP, energy compliance, permit-ready set.

  3. 03
    Permit review
    9 wks

    City corrections, utility sign-offs, building permit issued.

  4. 04
    Site work + foundation
    3–4 wks

    Erosion control, excavation, footings, slab or stem wall.

  5. 05
    Framing + dry-in
    5–6 wks

    Floor, walls, roof, windows, weather-resistive barrier.

  6. 06
    MEP rough-in + insulation
    4–5 wks

    Plumbing, electrical, HVAC, blower-door prep.

  7. 07
    Finish + cabinetry
    6–8 wks

    Drywall, paint, flooring, cabinets, tile, fixtures.

  8. 08
    Inspections + handover
    1–2 wks

    Final inspections, punch-list, 13-week build closeout.

MATERIAL_07

Materials

  • Cladding
    Hardie lap, 6" exposure (matching primary home)
  • Roofing
    GAF Timberline HDZ Pewter Gray

SYSTEM_08

Systems

  • Heating
    Hydronic radiant in slab + 9K mini-split
  • Water heating
    Rheem PROE40 electric, 40 gal

PERMIT_09 / RECORD

Permits & compliance

  • Permit number
    Edmonds BLD2024-0291

METRIC_10 / OUTCOME

By the numbers

$2,200
Monthly rent achieved
21
Days to rent

LESSON_11 / FIELD NOTES

What we'd repeat

  • 1940s-era garage slabs almost never carry habitable loads — budget a full slab replacement from day one.
FAQ

Frequently asked

  • Can I tour a project like "Edmonds Craftsman Conversion"?

    Yes — we typically have 6–10 ADUs in framing or finish at any time across the Puget Sound, so we can usually arrange a site walk on a project at the same stage you're planning. For completed projects, tours depend on the current owner's availability and privacy preferences. Request a tour and we'll match you to the closest active or completed project that resembles "Edmonds Craftsman Conversion" in size, configuration, and AHJ.

    Go deeper: Project Portfolio

  • What did this project actually cost?

    Each project page includes the all-in cost range for the size and configuration shown, scaled to 2026 prices. Actual contract value at time of build is confidential to the client, but the range we publish is anchored in real numbers from our bid archive — not aspirational pricing. For a tailored estimate against your lot, run our feasibility study or use the cost calculator.

    Go deeper: Read the Five hidden ADU costs that wreck Puget Sound budgets guide

  • How long did this project take?

    Most projects of this size and configuration run 9–14 months from contract to certificate of occupancy: 6–8 weeks of design, 8–16 weeks of permit, 18–26 weeks of construction. Schedule variance is driven by AHJ workload, owner selection pace, and field-discovered conditions during demo or excavation. We publish a Gantt at contract and update it weekly.

    Go deeper: Read the Eastside deck cost & permits: cedar, IPE, composite (2026) guide

  • Could you build "Edmonds Craftsman Conversion" again on my lot?

    Often yes — most of our projects are anchored on repeatable design DNA (envelope details, structural assemblies, MEP standard layouts) that adapt to different lot conditions with modest configuration changes. We'll review your lot's zoning, soils, and access to confirm fit. Where the original layout doesn't fit, we propose the closest workable adaptation that preserves the look you liked.

    Go deeper: Explore New Home Construction

  • What inspections did "Edmonds Craftsman Conversion" go through?

    Standard Puget Sound ADU inspection sequence applied: footing, underfloor MEP, framing, plumbing rough, electrical rough, mechanical rough, insulation, drywall nailing, shower pan, gas piping, final building, final plumbing, final electrical, final mechanical, and final energy verification (blower-door ≤3 ACH50). All passed with no notable callbacks — typical for our builds because we run internal QA checklists at each milestone.

    Go deeper: Edmonds ADU permit timeline

PROJECT_EDMONDS CRAFTSMAN CONVERSION

Want a build like "Edmonds Craftsman Conversion" on your lot? Get a real number.

We can share the exact scope, finishes and budget from this project — and tell you what the same build would cost on your address.

  • Same crews, same subs, same standards as "Edmonds Craftsman Conversion"
  • Free build-like-this feasibility on your address
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