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Finished detached ADU in Redmond, WA built by MNBE Construction & Development

Project · Redmond, WA · 2025

Redmond DADU. From 100-year-old structure to modern detached ADU.

A standalone 100-year-old structure sat unused on the property. We took it down to the studs and rebuilt it as a code-compliant modern DADU. New foundation, new framing, new roof, new windows, new mechanicals, new everything. The original bones are what survived.

Type

DADU (Conversion)

Location

Redmond, WA

Year Completed

2025

Scope

Gut + rebuild to studs

The Story

A second life for an outbuilding.

The owners had a Redmond property with a small standalone structure that had been sitting unused for years. It might have been the original primary dwelling on the lot a hundred years ago. By the time we got there, it was just standing.

The economics of building a brand-new DADU from scratch were strong, but the bones of the existing structure were worth preserving. We proposed a different path: keep the foundation footprint and the original framing where structurally sound, gut everything else, and rebuild the structure as a code-compliant modern DADU under HB 1337.

We took the whole thing down to the studs. New siding, new roof, new windows, new doors, new plumbing, new electrical, new HVAC, new insulation, new floors, new finishes. The only thing left was the original bones. The result is a finished DADU that reads as a fresh build but draws from the existing structure's character and lot positioning.

Aaron supervised the project from foundation reinforcement through final inspection. The DADU is now generating rental income for the owners.

Scope of Work

Down to the studs. Then everything new.

Foundation reinforcement and structural assessment

Demolition of all interior finishes and obsolete systems

Selective framing repair and reinforcement

New roof structure and shingle roofing

New exterior siding (white lap with dark trim)

All new windows and exterior doors

Complete plumbing system replacement

Complete electrical rewire with new panel

New HVAC heat-pump system

Full insulation upgrade (walls, floor, ceiling)

New kitchen and bath

City of Redmond permits + inspections through CO

The Reveal

The Finished Build.

Before we walk you through the build, here is what it looks like finished. The front elevation, the kitchen, the spa bath, and a finished interior room.

Finished Redmond DADU front elevation, white lap siding, brown deck, blue sky

Front elevation

Finished kitchen

Finished kitchen

Spa bath

Spa bath

Finished interior

Finished interior

The Build · Chronological

Ten stages, three months start to finish.

From the early frame to the finished kitchen, bath, and laundry. Every photo from the actual job site, taken by Aaron and his crew during the work.

  1. Early framing
    Stage 01

    Early framing

    Open wall framing through the front of the structure, OSB sheathing piled in the yard, a crew member working at the front opening under bright sky.

  2. Sheathing + roof complete
    Stage 02

    Sheathing + roof complete

    Full OSB exterior shell with the new shingled roof, doors and windows roughed in, blue insulation pallets staged on the lawn. Weather-tight envelope reached.

  3. Plumbing rough-in
    Stage 03

    Plumbing rough-in

    Interior plumbing rough-in: PEX manifold with red and blue water lines mounted between the studs, floor joists exposed, mechanical rough-in stage from below the new floor.

  4. Exterior cladding underway
    Stage 04

    Exterior cladding underway

    House wrap and partial yellow siding install. Scaffold staging on the side wall, crew finishing the porch framing in the foreground.

  5. Drywall hung
    Stage 05

    Drywall hung

    Two finishers walking the rooms over paper-protected subfloor, taped seams visible, daylight pouring through new windows.

  6. Cabinet drop
    Stage 06

    Cabinet drop

    Drywall finished, first base cabinet boxes staged in the kitchen. Aaron checking a measurement, Milwaukee tool bag and saw on the floor.

  7. Cabinet install
    Stage 07

    Cabinet install

    Full perimeter and island cabinetry set in place without countertops yet. Ladder mid-room, painter blocking visible.

  8. Kitchen finished
    Stage 08

    Kitchen finished

    Stainless range and microwave under the marble backsplash and quartz counter. The kitchen now reads as finished.

  9. Interior reveal
    Stage 09

    Interior reveal

    Hallway with crisp white walls, recessed cans, a sconce, and light wood floor leading toward the kitchen.

  10. Finished laundry
    Stage 10

    Finished laundry

    Deep navy-grey shaker cabinetry, white quartz, stainless washer and dryer in place, matte black faucet. Utility room final.

From Google

What Dave said.

D

Dave Gierok

1 review

2 months ago

We hired MNBE Construction & Development for a full renovation of our 100+ year old home, and the results exceeded expectations. They handled full structural upgrades, complete reframing, replacement of old and rotten framing, brand new insulation, new flooring, a luxury bathroom, a high-end kitchen, new solid doors, a large deck, a new roof, and mini-split AC units. What stood out most was that the budget remained exactly as agreed upon in the first meeting. No surprises. The speed and efficiency were incredible, and the quality of work was top-notch. Communication was clear, the crew was professional, and we would absolutely work with them again.

Posted on Google
Helpful

Redmond, WA · February 2026

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The Law

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Read the guide →
5.0 on Google · HomeAdvisor

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Contact information

Thank you for considering MNBE for your project. We'll get back to you during normal business hours, Monday through Saturday.

+1 (206) 637-0044MNBE.service@gmail.com

2014 Fairview Ave Unit 2308
Seattle, WA 98121

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