ADU Design & Construction Services
Custom Accessory Dwelling Units built for homeowners — designed to last, built with care, permitted with confidence.
⛨ Licensed & Insured ⚲ Local Contractor
Built locally. Built to last.
At Green Bee Construction, we help homeowners design and build Accessory Dwelling Units that are practical, well-built, and designed to last. Whether you are planning a rental unit, a space for family, or simply want to make better use of your property, we guide you through the entire process from the first idea to the final build.
Not sure if an ADU is the right fit for your property? Read our guide to building an ADU to learn about local requirements, planning considerations, and what to expect before getting started. Building in Auburn, Granite Bay, or elsewhere in Placer County? See our Placer County ADU page for real costs and permitting.
Our team understands the permitting process, site conditions, and building requirements that apply to ADU projects. That experience helps avoid delays and keeps your project moving in the right direction.
Three ways to add an ADU to your home
Detached ADU
A fully independent structure built in your backyard with its own entrance, kitchen, and bathroom — ideal for rentals or guest housing.
Building Conversion
Transform an underused garage, barn, or other outbuilding into a comfortable, code-compliant living space without expanding your home's footprint.
Attached & Junior ADU
A new addition built onto your existing home, or a junior ADU of up to 500 square feet created within it. Either way, a private, self-contained living space.
ADU SERVICES OFFERED
We handle every stage of the ADU process so you are not juggling multiple contractors or consultants.
Detached ADUs
Standalone backyard units, designed and built from the ground up to suit your lot and lifestyle.
Building Conversions
Convert a garage or outbuilding into a fully livable space — efficient, affordable, and code-ready.
Design and Build
A complete design-build process so you have one trusted team from concept to keys. If your project also involves improving your existing house, we can coordinate home remodeling and additions alongside your new ADU.
Why homeowners build ADUs
✔ Rental Income - Generate steady monthly income from a long- or short-term rental.
✔ Property Value - Add significant resale value to your home and property.
✔ Family Housing - Keep loved ones close while giving everyone their own space.
✔
Flexible Use - Office, studio, gym, guest house — adapt the space as needs change.
The right team for your ADU
Our experience also includes custom home construction, allowing us to bring the same level of craftsmanship, planning, and attention to detail to every ADU we build. We have spent years building in Nevada County, and that local experience makes a real difference at every stage of your project.
Local Expertise
Years of experience building in Nevada County terrain.
Permit Knowledge
We navigate the local permitting process so you don't have to.
Quality Craftsmanship
Built to last with attention to every detail and finish.
Clear Communication
Honest updates and straightforward answers — every step of the way.
What does an ADU cost? $100K to $300K+
Every ADU is unique. Final cost depends on the type, size, finishes, and site conditions. Common cost factors include:
- Size and square footage
- Detached vs. attached vs. garage conversion
- Site preparation and utility hookups
- Finish level — standard, mid-grade, or premium
- Permits and local impact fees
From first idea to final walkthrough
Garage Conversion ADU Project
A complete garage conversion turned an underused space into a bright, modern one-bedroom unit. The project included new insulation, a full kitchen, custom millwork, and energy-efficient windows — all permitted and inspected to current Nevada County standards.
Looking for more inspiration? Explore our
ADU Gallery to see additional completed ADU projects, design ideas, and the quality craftsmanship we bring to every build across Nevada County.
Common ADU questions
How long does it take to build an ADU?
Most ADU projects take 6 to 12 months from initial design through final inspection. Garage conversions are typically faster than ground-up detached builds.
Do I need a permit for an ADU in Nevada County?
Yes. All ADUs require permits from Nevada County. We handle the entire permitting process for you, including plans, submittals, and inspections.
Can I rent out my ADU?
Yes. ADUs in California can be rented as long-term rentals. Local short-term rental rules vary, so we'll help you understand what applies to your property.
How big can my ADU be?
Detached ADUs in California can typically be up to 1,200 sq ft, depending on lot size and local rules. We'll review your site and recommend the best size for your goals.
Do you handle the design too?
Yes — we offer full design-build services so you have one trusted team from your first sketch through the final walkthrough.
Service Areas
We build ADUs throughout:
Granite Bay
Surrounding Nevada County communities
GET STARTED TODAY
Start your ADU project
If you are thinking about building an ADU, the first step is a conversation about what is possible on your property. Contact Green Bee Construction to schedule a consultation and get a clear plan for moving forward.
