Mallard Brothers Construction

120 State Avenue Northeast, Olympia, WA 98501

Mallard Brothers Construction builds ADUs & Tiny Homes in Olympia, WA. They offer attached, detached, garage conversions & ADA-accessible units, managing design, permits & construction for property owners seeking rental income or extra living space.

Mallard Brothers Construction – ADU Contractor in Olympia, WA

About Mallard Brothers Construction

Mallard Brothers Construction: ADU Builder in Olympia

Mallard Brothers Construction is an Olympia-based contractor specializing in the design and construction of Accessory Dwelling Units (ADUs) and Tiny Homes. Their team manages projects from initial planning and design through to utility connections and final construction, handling the process on behalf of the property owner.

ADUs are self-contained living spaces built on a property that already has a primary residence. Sometimes referred to as Mother-in-Law suites, granny flats, or Detached Accessory Dwelling Units (DADUs), these units typically range between 500 and 900 square feet and can comfortably accommodate one or two occupants. They serve a range of purposes — housing family members, generating rental income, or providing a private workspace.

Types of ADUs Offered

Mallard Brothers Construction offers several ADU types to suit different properties and needs:

  1. Attached ADUs – Connected to the main home but with private entrances, offering independence while remaining close to the primary residence.
  2. Detached ADUs (DADUs) – Stand-alone units that provide privacy and flexibility for guests, renters, or use as a workspace.
  3. Garage Conversions – Converting an existing garage into a livable space, with attention to Thurston County codes regarding wells and septic systems.
  4. Custom Tiny Homes – Eco-friendly and efficient designs focused on minimal living without sacrificing basic comfort.
  5. ADA-Accessible ADUs – Units designed for aging in place, incorporating features such as wider doorways, ramps, and barrier-free showers to support varying mobility needs.

For properties within Olympia city limits, Mallard Brothers can work with Olympia's Preapproved ADU plan sets. Selecting from one of these four designs can reduce permitting time and help avoid additional engineering costs, potentially speeding up the overall project timeline.

The ADU Building Process

Mallard Brothers approaches each ADU project as a collaborative effort with the property owner. The process generally follows these steps:

  1. Initial Consultation and Feasibility Study – The team assesses the property's zoning, sewer, and septic capacity to determine the most suitable approach.
  2. Design and Planning – Clients can choose from preapproved plans or work with the design team to develop a custom layout.
  3. Permits and Approvals – Mallard Brothers handles the necessary permits and ensures the project meets all relevant regulations.
  4. Construction and Finalization – From utility connections to finishing details, the team completes the build and prepares the unit for occupancy.

Customization options are available across both interior and exterior elements. These include vaulted ceilings, cedar detailing, and custom finishes, as well as outdoor additions like covered decks or saunas. Energy-efficiency features such as solar panels and sustainable materials are also available for those looking to reduce their environmental footprint.

Mallard Brothers Construction works with clients whether they are starting from a preapproved plan or require a fully customized accessory dwelling unit built to specific requirements. Their focus is on durable materials, functional layouts, and integration with the existing property style.

Services

Mallard Brothers Construction performs the following services

  • Architecture & Design
  • Permit Specialist
  • Construction
  • Feasibility & Site Assessment
  • Finishing & Fit-out

Mallard Brothers Construction Reviews

Lisa Seifert

2026-01-28
"it was great to work with Mallard Brothers. on my project. We converted a garage into a one bedroom house that I initially thought I might rent, but we ended up designing such a beautiful unique place, that I decided to live here. During the middle of the build we came up with some pretty unique features like a bay window, a covered front porch with a ramp, among other details. The team was top level. Fun people to work with and everything got done on time."

D J

2026-01-25
"As a Realtor - it is imperative to have a reliable, trustworthy, quality custom builder to turn to for my clients. Mallard Brothers produces beautiful, quality custom homes as well as provides excellent customer service from start to finish. I highly recommend them and look forward to continuing to work together."

laura vogel-ciernia

2025-11-07
"We could not be happier with the work Mallard Brothers Construction did on our garage-to-guest house conversion! From start to finish, the entire team exceeded our expectations. They brought creative ideas to the design, kept us informed every step of the way, and delivered craftsmanship that is absolutely top-notch. What impressed us most was their attention to detail and professionalism. Every finish, from the flooring to the cabinetry, was done with such care and precisionit truly feels like a custom home, not just a converted space. They handled permits, inspections, and all the logistics seamlessly, making the process stress-free for us. Our new guest house is beautiful, functional, and feels like its always been a part of our home. Family and friends are blown away when they see it, and we constantly get compliments on the quality of the work. Mallard Brothers Construction turned our vision into reality, and we couldnt be more grateful."

syd snyder

2025-08-01
"Mallard Brothers is everything you'd want in a contractor - professional, creative, and detail oriented. Kevin, Tyler, and Keenan aren't just talented builders - they're active members of the community who genuinely care about the people they work with and work for. It shows in the pride they take in every project. I've had the pleasure of working with them on a few projects and am grateful to have them in my corner. They're my first call. Every. Time."

Randi Day

2024-12-16
"When I decided to change my bathroom tub to a walk-in shower, I was introduced to Kevin McCrea of Mallard Brothers Construction. He took care of all the pre-construction steps kept in touch with me as things progressed or changed. Then I met the rest of the team Keenan Duke Tyler Alverson!! They were friendly, professional, fast efficient. They also kept me informed of their tasks at end of their day. They finished on time their attention to details was impressive. Before they left, they cleaned up the work area removed all packing materials from garage. All 3 of the guys were a pleasure to deal with I was totally happy and satisfied with their work. Thank you to everyone at Mallard Brothers "

Specifics

Eco-Friendly Free Consultation Turnkey Solutions

Opening hours

Monday 7:00AM - 6:00PM
Tuesday 7:00AM - 6:00PM
Wednesday 7:00AM - 6:00PM
Thursday 7:00AM - 6:00PM
Friday 7:00AM - 6:00PM
Saturday 10:00AM - 3:00PM
Sunday -

Location

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