Trusted Redmond 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 Redmond. We design, permit, and build backyard cottages, garage conversions, 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 Redmond and King County with careful, lasting craft.
We design detached backyard cottages, garage conversions, and attached units shaped to your lot and how you plan to live.
City zoning and the two-ADU law can feel like a maze. We manage every permit step so your build clears all code checks.
We use durable, energy-smart materials that lower upkeep, hold up for decades, and trim your monthly utility bills.
From that first consult and 3D renderings to the closing walkthrough, we oversee every phase of your ADU build closely.
BB-Builders Pro handles every part of your ADU project, from first sketch to final sign-off in Redmond. Our full services include:
Add a freestanding backyard cottage on your Redmond lot, a great fit for rental income, family, or a private guest space.
Reshape your garage or unused interior space into a fully livable attached ADU, gaining a home with no new building footprint.
Thinking long term? We construct yard additions and outbuildings set up to become a future detached ADU down the road.
We create bespoke ADU floor plans and layouts built around your Redmond lot, your budget, and how you plan to use it.
We take on every building permit, zoning sign-off, and code check, keeping your ADU project moving smoothly and legally.
Own an older ADU or home extension already? We tackle renovations, interior updates, and energy-efficient improvements too.
Testimonials
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We come to your Redmond property, learn what you need, and offer straight 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 detail before any digging starts.
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We take care of each building permit, zoning rule, and code check, so the legal side never lands on your plate at all.
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Our crew clears and preps the site, then builds carefully, keeping things clean, efficient, and easy on your everyday routine.
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Once we finish, a full inspection and walkthrough confirm that every last detail meets our safety and quality standards.
An ADU is a secondary home on a single-family lot, either attached to the main house or built as a separate detached structure. Redmond allows up to two ADUs per lot, one attached and one detached, under RMC 21.08. Both types 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 in Redmond needs a building permit, plus zoning and code review under RMC 21.08. Detached units and garage conversions each carry their own requirements. We prepare the full application and manage it so your project stays compliant.
Cost depends on size, type, and finishes. A garage conversion runs the least, while a large detached cottage costs the most. Utility connections and site work add to the total. We give you 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.
Redmond caps a detached ADU at 1,000 square feet of gross floor area. On lots larger than 10,000 square feet, the city may allow a bigger unit. Setbacks and lot coverage still apply. We design to the largest unit your property permits.
Yes. Redmond requires a new or detached ADU to match the primary home’s facade, roof pitch, siding, and windows. This keeps the unit in character with the neighborhood. We handle that design alignment so the plans clear review the first time.
Not always. Some ADUs share water and power with the main house, while others need separate connections depending on size and layout. Separate meters help if you plan to rent. We assess your utilities during the site evaluation.
Yes. In Redmond a garage conversion often qualifies as an attached ADU under RMC 21.08. It needs a permit, parking replacement, egress windows, and energy-code compliance. We handle the conversion from design through final inspection.
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 King 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.