Trusted Snohomish ADU Builders for Detached and Attached Units
Want a rental unit, guest house, or more room for family? BB-Builders Pro is a team of ADU builders serving Snohomish. We design, permit, and build detached backyard cottages and accessory dwelling unit additions. State law now allows up to two ADUs per lot, so there is more room to add value than ever. We handle the full build, from site evaluation to final walkthrough, on your schedule.
Trusted Family Owned Remodeling Service
Our licensed crew has built detached and attached ADUs across Snohomish County with careful, lasting craft you can trust.
We plan detached backyard cottages and attached accessory units around your lot and the way you want to live each day.
County zoning and the two-ADU law can feel like a maze. We walk each permit step so your build clears every code check.
We choose rugged, energy-smart materials that trim upkeep, last for decades, and hold your monthly utility costs down.
From the first consult and 3D renderings all the way to final sign-off, we steer each phase of your ADU build with care.
BB-Builders Pro handles every part of your ADU project, from first sketch to final sign-off in Snohomish. Our full services include:
Drop a freestanding backyard cottage on your Snohomish lot, a great fit for rental income, family, or a quiet guest space.
Reshape underused interior space into a fully livable attached ADU, adding a second home within your current footprint.
Building down the road? We raise yard additions and outbuildings set up to become a future detached ADU when you choose.
We shape bespoke ADU floor plans and layouts around your Snohomish lot, your budget, and just how you plan to use it.
We manage each county permit, zoning sign-off, and code check, keeping your ADU project moving along smoothly and legally.
Already own an older ADU or home extension? We take on renovations, interior updates, and energy-efficient upgrades too.
Testimonials
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We visit your Snohomish property, listen to your goals, and give clear guidance on the right ADU or home plan for the lot.
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Our design team produces full blueprints and 3D renderings, so you can see your ADU or addition in true detail long before we dig.
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We handle each county permit, zoning rule, and code check, so the legal paperwork never turns into your problem to solve.
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Our crew clears and preps the ground, then builds with true care, keeping the site clean, orderly, and easy on your routine.
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Once we wrap up, a careful inspection and walkthrough confirm that every last detail meets our safety and quality marks.
An ADU is a secondary home on a single-family lot, either attached to the main house or built as a separate detached structure. The City of Snohomish allows up to two ADUs on a lot with a principal home. Both attached and detached units are permitted, giving homeowners more flexibility than before.
An ADU adds rental income, housing for aging parents, or a private guest space. It uses land you already own, so it builds value without buying more property. With two units now allowed per lot, the earning and living options are wider than before.
Yes. Every ADU needs a building permit, plus zoning and code review. One key point: addresses inside the City of Snohomish follow city code, while nearby addresses fall under Snohomish County with different rules. We confirm which applies to your lot, then prepare and manage the full application.
Cost depends on size, type, and finishes. A conversion of existing space runs the least, while a large detached cottage costs the most. Water, sewer, and septic work can add meaningfully in this area. We give one written estimate after a free on-site visit.
Most ADUs take a few months from permit approval to move-in. Design and permitting add time before the build starts. Detached units usually take longer than conversions. We map out the full schedule before any work begins.
Yes, for long-term tenants. The City of Snohomish does require the owner to live on-site if either unit is used as a short-term rental. Long-term rentals do not carry that rule. We can walk you through which path fits your plans.
In the City of Snohomish, a detached ADU can reach 1,000 square feet, while attached units have no fixed maximum, subject to setbacks. Unincorporated county lots use a 1,200 square foot cap instead. We design to the largest unit your specific lot allows.
Yes, more than in many cities. You must document that your water supply and sewer or septic system can handle the added unit. On septic, the county health district should be consulted early. We sort this out before you invest in full plans.
Sometimes. A detached ADU often needs its own water and sewer connection, while an attached unit can share with the main house. Connection fees may apply per meter. We assess your utilities and likely costs during the site evaluation.
It can. New ADU structures in the Historic, Pilchuck, or Midtown districts go through design review in the City of Snohomish. That shapes materials, form, and placement. We plan the design to clear that review the first time.
Usually yes. Adding livable square footage raises your assessed value, so property taxes typically go up. The added rental income or home value often outweighs the increase. The Snohomish County assessor sets the exact change after the build.
Simple Financing Options
Discover the perfect financing solution for your remodeling project. We provide tailored options to suit your budget and ensure your dream home becomes a reality.
Contact us today for a free consultation, and let’s begin transforming your house into the home you’ve always wanted.
Contact us today for a free consultation, and let’s begin transforming your house into the home you’ve always wanted.