What is the difference between a turnkey ADU and a custom ADU?

A turnkey ADU lets property owners choose from county-approved floor plans and curated design packages to streamline the build process. Conversely, a custom ADU offers greater flexibility to tailor the floor plan, materials, and features to the owner’s unique property characteristics and specific goals.

What is included in Fairbank ADU Select?

Fairbank ADU Select includes design coordination, construction, and project management, providing owners with a streamlined path to an accessory dwelling unit with limited customization but maximum efficiency.

Are the ADU plans pre-approved by Kitsap County?

Yes, Fairbank's turnkey ADU program uses Kitsap’s and surrounding counties’ pre-approved ADU plans to fast-track permitting and simplify pre-construction logistics.

How much customization is available with ADU Select?

The ADU Select program lets property owners choose from a selection of interior finishes, materials, and fixtures.

When is a custom ADU the better option?

A custom ADU is ideal for properties with unique site conditions or for owners with specific requirements for layout, architectural style, materials, or features. It also provides a better path when the available ADU Select plans do not align with how owners intend to use the space.

Turnkey & Custom ADU Construction in Kitsap County

For over 47 years, Fairbank has helped homeowners across Kitsap County, Bainbridge Island, and surrounding areas make the most of their properties.

Whether you want a turnkey accessory dwelling unit or a thoughtfully designed custom ADU, Fairbank takes the complexity out of building an additional living space that supports your unique needs.

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Choose Your Path:
Streamlined Turnkey or Fully Custom

Fairbank offers two approaches to help you choose an ADU that aligns with your goals, budget, property, and desired level of customization.

Turnkey ADU: A Simpler, More Streamlined Way to Build an ADU

Turnkey ADU offers a streamlined building experience utilizing pre-approved plans and curated design packages developed in coordination with Kitsap County and the surrounding areas’ building programs.

How Our Turnkey ADU Program Works:

1

Choose a pre-approved ADU plan

Select from a portfolio of pre-approved ADU plans designed specifically for properties in Kitsap County, Bainbridge Island, and surrounding areas.

2

Select from curated finish options

Choose one of our design packages featuring curated material palettes, high-end fixtures, refined cabinetry options, and defined

3

We Handle Pre-Construction and Permitting

Our pre-construction process compiles your entire permit package, including the site survey, ADU siting, a stormwater management plan, and a septic plan if your property needs one. From there, we layer in our standard pre-construction services: pricing, scheduling, a constructability review, value engineering, and MEP design. This gives you a fully coordinated plan before construction begins.

4

We Handle the Rest

Fairbank manages the construction process from pre-planning to completion, coordinating the work required to bring your selected ADU plan and finishes together into a refined, functional, and harmonious living space.

Fairbank’s Turnkey ADU is an ideal construction pathway for homeowners who value transparent pricing, accelerated project timelines, and an effortless decision-making process without sacrificing craftsmanship or high-end aesthetic appeal.

Fully Custom ADU: An Accessory Dwelling Unit Designed Around Your Home, Property, and Vision

For homeowners whose vision goes beyond the available pre-approved plans, Fairbank's custom ADUs offer greater control over design choices and how the space integrates with the property.

As a trusted custom ADU builder in Kitsap County and Bainbridge Island, Fairbank works with the region's most renowned architects and designers to develop a solution tailored to homeowners' preferred floor plan, architectural style, materials, finishes, and property-specific requirements. Because your architect typically handles permitting on a custom project, our pre-construction role stays focused on what we do best: pricing, scheduling, constructability review, value engineering, and MEP design. This keeps your architect's vision and our construction plan aligned from day one.

Custom ADUs are ideal for architecturally significant or luxury properties on complex, sloped, or uniquely shaped lots where a standard template plan will not fit or would detract from the main estate's appraisal value.

Property, and Vision

Turnkey ADU SelectCustom ADUDesign ApproachPre-approved architectural floor plansCustom architectural layoutCustomization LevelLimited to package variationsFreedom to choose materials, layouts, and finishesPermitting & ApprovalFast-tracked Kitsap County pre-approved plansSite-specific permitting and architectural reviewPre-ConstructionPermit package plus standard pre-con services (pricing, scheduling, constructability review, value engineering, MEP design)Standard pre-con services only (pricing, scheduling, constructability review, value engineering, MEP design), architect typically handles permittingTimelineAccelerated pre-construction and build durationStandard custom construction timelineLot SuitabilityStandard, flat, uncomplicated lotsSloped, complex, or luxury estatesBest ForHomeowners who value simplicity and predictabilityHomeowners with specific design or property requirements

OR

Which ADU Option Is Right for You?

The right ADU option depends on the homeowner’s timeline, property characteristics, and desired level of involvement. Turnkey ADUs are preferred by those seeking fixed costs, fast-tracked permitting, and a streamlined construction process that simplifies decision-making.

Conversely, custom Custom ADU design and construction are recommended for property owners who require solutions for challenging lots, specialized layouts, or unique design goals that pre-approved plans don’t satisfy.

Not sure which option is right for your property?

Talk With Our Team

Why Build Your ADU With Fairbank?

For nearly 50 years, Fairbank has combined regional expertise with a trusted team that manages projects from pre‑construction through completion, delivering results that reflect both craftsmanship and a commitment to preserving Kitsap County and Bainbridge Island’s unique charm.

What You Get With Fairbank

County-Approved ADU Plans

Professional Project Oversight

Transparent Pricing

Licensed, Bonded, and Insured Team

Warranty-Backed Workmanship

When you work with Fairbank, you get a single point of contact and an experienced team to oversee and execute your project from start to finish. Whether you’re looking for a turnkey ADU or a fully customized living space, our structured and time-tested approach ensures a simple, seamless, and stress-free construction process.

Planning an ADU in Kitsap County and surrounding areas?