ADU Contractor · Seattle, WA

Seattle ADUs: Built by Neighbors, For Neighbors

Unlock your Seattle property's full potential with a custom ADU, adding value and space right here in our community.

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ADU Contractor Experts

Your Seattle ADU Journey, With Us

We're Seattle ADU Solutions, and we've been helping folks right here in our neighborhoods, from Ballard to Beacon Hill, create amazing Accessory Dwelling Units. We understand Seattle's unique building codes and the distinct character of each area. Our process starts with truly listening to your vision for your property, whether it's for family, rental income, or a quiet backyard retreat. We handle everything from navigating the city's permitting process, which can be a real Seattle adventure, to the final touches. You can expect clear communication and a friendly face throughout, ensuring your new ADU fits perfectly into your life and our city's landscape.

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What We Do

Our ADU Contractor Services

01

Attached ADU

Attached ADU

Attached ADU construction involves adding a complete living unit directly to your existing home, sharing at least one wall. This solution creates valuable extra space for family or rental income right on your property in Seattle.

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02

Detached ADU

Detached ADU

A detached ADU creates a completely separate living space on your property, offering privacy and flexibility for family, renters, or a home office. This addition can significantly boost your property's value and provide a steady income stream right here in Seattle.

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03

Garage Conversion

Garage Conversion

Garage conversion transforms your existing garage into a fully functional living space, like an apartment, office, or studio. This adds valuable square footage and boosts your property's utility right here in Seattle.

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04

ADU Permitting

ADU Permitting

ADU Permitting in Seattle includes navigating local zoning, preparing detailed plans, and submitting all necessary applications to the Department of Construction & Inspections. We handle the paperwork and coordination so your ADU project can move forward smoothly, keeping you in the loop every step of the way.

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05

ADU Design

ADU Design

ADU design involves creating detailed architectural plans and blueprints for your new backyard cottage or attached living space. This thoughtful planning ensures your project meets Seattle's zoning rules and fits beautifully with your existing home.

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06

ADU Engineering

ADU Engineering

ADU engineering involves creating the structural and civil plans needed for your Accessory Dwelling Unit, ensuring it meets all Seattle building codes. This crucial step guarantees your ADU is safe, sound, and ready for construction in our unique Seattle environment.

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07

ADU Financing

ADU Financing

ADU financing helps homeowners in Seattle secure the funds needed to build their Accessory Dwelling Unit, covering everything from design and permitting to construction costs. This service opens up opportunities for homeowners to add value to their property and create new income streams or living spaces right here in their neighborhood.

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08

ADU Construction Management

ADU Construction Management

ADU construction management involves overseeing every detail of your Accessory Dwelling Unit project, from initial permits to final touches. We ensure your ADU build stays on track, on budget, and meets all Seattle regulations, giving you a smooth journey to your new space.

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09

Junior ADU (JADU)

Junior ADU (JADU)

A Junior ADU (JADU) involves converting an existing bedroom or space within your main home into a separate living unit, complete with a kitchen and bathroom. This creates a cozy, independent living area perfect for family, renters, or guests, right here in your Seattle home.

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10

ADU Site Assessment

ADU Site Assessment

Our ADU Site Assessment service thoroughly evaluates your property's potential for an Accessory Dwelling Unit, covering zoning, utilities, and site conditions. This initial step helps you understand the feasibility and estimated scope of your ADU project right here in Seattle.

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Seattle's Local ADU Contractor Experts

Seattle ADU Solutions is proud to serve Seattle, WA and the surrounding communities. Our reputation is built on honest work, clear communication, and results that hold up over time.

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FAQ

Frequently Asked Questions

An ADU, or Accessory Dwelling Unit, is a secondary housing unit on a single-family lot, and they are popular in Seattle because they provide flexible living space and can help address our city's housing needs. They can be detached (D-ADU), like a backyard cottage, or attached (A-ADU), such as a basement apartment. Seattle's recent zoning changes have made it easier for homeowners to build ADUs, offering opportunities for rental income, multi-generational living, or extra space without needing to move.
Building an ADU in Seattle typically takes between 12 to 18 months from initial design to final occupancy, though this can vary. The permitting phase with the Seattle Department of Construction & Inspections (SDCI) usually takes several months, followed by the actual construction. Factors like the complexity of the design, site conditions (especially on our hilly terrain), and current city review times can influence the overall timeline. We work to keep things moving smoothly for you.
The average costs for an ADU project in Seattle generally range from $200,000 to $400,000, depending on size, finishes, and site preparation. Smaller, simpler units or garage conversions might be on the lower end, while larger, custom-built detached units with high-end finishes can be more. These costs include design, permitting fees, materials, and labor. We provide detailed estimates tailored to your specific project and property.
Yes, you absolutely need special permits from the Seattle Department of Construction & Inspections (SDCI) to build an ADU in Seattle. This includes a building permit, and potentially plumbing, mechanical, and electrical permits. Seattle has specific zoning regulations regarding ADU size, height, setbacks, and parking requirements. We help you navigate this entire permitting process, ensuring your project meets all local codes and moves forward without unnecessary delays.
An ADU can significantly add value to your Seattle home by increasing usable living space and providing potential rental income. In our competitive housing market, properties with ADUs often command higher prices due to their versatility. Whether it's for a long-term tenant, a short-term rental for visitors exploring the city, or a private space for family, an ADU offers financial benefits and enhances your property's appeal. It's a smart investment in your home and our community.

Proudly Serving Seattle and the Surrounding Area

From Seattle to the surrounding communities, we bring the same level of care and craftsmanship to every job — whether it's a quick repair or a full project.

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Let's Build Your Seattle ADU Together

Reach out today for a friendly, no-obligation consultation about your backyard cottage or basement apartment.

Get Your Free Quote 206-208-7461