Get Your Custom DADU Estimate
Years in Construction
0
Sq Ft Constructed & Remodeled in 2024
0
K+
Coverage. Fully Insured
$
0
M
Seattle Pre-Approved
“Preapproved Plans are DADU designs that have already been reviewed and approved by the city, allowing you to save months in permitting and start building faster.”
DADU Floorplans
Preapproved Plans are DADU designs that have already been reviewed and approved by the city, allowing you to save months in permitting and start building faster.
We offer 8 pre-approved DADU plans that save time on permitting and can be customized to fit your property — or we can create a unique design tailored just for you.
- 1,000 sq ft
- 2 bd
- 2 ba
A family-friendly, 1,000 sq ft DADU with a balanced layout and excellent adaptability for sloped or narrow lots.
From
$373,00
- 600 sq ft
- 1 bd
- 1 ba
A single-bedroom DADU designed for accessibility, comfort, and long-term value.
From
$323,232
- 808 sq ft
- 2 bd
- 2 ba
A flexible two-story DADU that adapts easily to different site layouts and family needs.
From
$369,442
- 964 sq ft
- 3 bd
- 2 ba
A flexible two-story DADU with three bedrooms, designed to maximize space on standard Seattle lots.
From
$389,753
- 600 sq ft
- 1 bd
- 1 ba
A flexible, energy-efficient one-bedroom DADU with timeless architectural appeal.
From
$383,712
- 850 sqft
- 2 bd
- 1 ba
A compact, thoughtfully designed DADU inspired by Scandinavian simplicity and efficient living.
From
$383,420
Custom Projects
“Preapproved Plans are DADU designs that have already been reviewed and approved by the city, allowing you to save months in permitting and start building faster.”
DADU Floorplans
Book a free on-site visit with our specialist to evaluate your lot and explore which home options can be built under your city’s requirements.
We offer 8 pre-approved DADU plans that save time on permitting and can be customized to fit your property — or we can create a unique design tailored just for you.
DADU Floor Plan A
- 1,200 sq ft
- 3 bd
- 2 ba
One of our largest DADU floor plans, offering 1,200 sq ft of thoughtfully designed living space with all three bedrooms located on the second floor and a functional two-bath layout for comfortable modern living.
From
$437,038
DADU Floor Plan B
- 1,200 sq ft
- 3 bd
- 3 ba
One of our largest DADU floor plans, featuring 1,200 sq ft with three bedrooms and three full bathrooms, providing extra flexibility, privacy, and convenience for larger households or guests.
From
$447,038
Looking for a custom project?
We offer fully custom DADU and ADU design options, giving you the flexibility to create a home that fits your vision perfectly - whether it’s a detached backyard home, attached unit, garage conversion, or a completely custom layout.
What Our Clients Say
Peter
AG Construction delivered professional work, stayed on budget and on time — the result is beautiful.
Bothell, WA
Kartik
Everything went smoother than we expected — finished early, on budget, and the space now feels brighter and more open.
Bellevue, WA
Chelsey
They finished our full remodel in just over 2 months — now the space is open, modern, and finally feels like home
Des Moines, WA
Lindsey
Everything was planned with no surprises, and the detailed work exceeded even my meticulous standards.
Kirkland , WA
Caitlin
I chose AG Construction to renovate our home into a mix of modern style and cottage comfort, with a new bedroom and mudroom for the kids.
Kirkland, WA
Ganna
We added a basement office, and AG Construction guided us through every detail with clear, professional communication, making the whole process organized and transparent.
Seattle, WA
Valentina
AG Construction expanded my kitchen perfectly, stayed on time and on budget, communicated clearly, and made the whole process comfortable.
Bellevue, WA
Ramendra
This project shows how a home can be completely reimagined without moving out of a beloved neighborhood.
Bellevue, WA
Why Build a DADU?
Generate Rental Income
Earn up to
$36К yearly
in steady rental income (typical Eastside DADU rent)
Increase Property Value
Boost home value by
$300К+
(+10–20% to a typical Bellevue home with a DADU)
Faster & Easier Approval
Estimating Market price for DADU up to $950k
Higher ROI if You Build Now
With build costs rising, starting today locks in stronger returns and a faster break-even.
Our 6-Step Process
Lot Visit With Ready Solutions
We analyze your lot in advance and arrive with DADU options that already fit your property; on site we take measurements, photos, and clarify your goals.
Office Meeting With Full Custom Estimate
You receive a personalized cost breakdown with all expenses, plus materials, timeline, foundation details, and budget alignment.
Plan Alignment
We refine the package, finalize project decisions, and answer all remaining questions.
Design & Permits
We prepare the complete permit set — architectural plans, engineering, documentation — and submit everything to the city.
Construction
After permit approval, construction begins (~4 months), with daily photo updates and a live project schedule.
Turnkey Delivery & Warranty
Your DADU is delivered move-in ready, with a 1-year warranty and walkthroughs at 1 and 11 months.
Meet the Team Behind DADU by AG Construction
Ilia Kovalev
Owner
Robert McEwen
Estimating Representative
Temirlan Makhmetov
Project Manager
Tobyn Mewharter
Construction Expert
Karen Tran
Estimating Representative
Jimi Zheng
Estimating Representative
Ekaterina Zasorina
Head of Design & Architectural Department
Diana Perekrestova
Finance Manager
Our Partners & Suppliers
See a Project in Real Life
Join an Individual On-Site Project Tour
Walk through an active build, see construction quality up close, and ask questions directly on site.
We vs. Our Competitors
Why choose us? Compare key benefits and see how we outperform the competition every step of the way
What Makes Us Different
Architect & Engineer Included
Full architectural and structural support on every project
One-Window Project Management
Design, permits, and construction all under one roof
Transparent, Fixed Pricing
Clear cost breakdown for each scope of work
Daily Progress Updates
Photos and updates sent straight to your phone
Financing Support Available
Multiple partner programs to support ADU/DADU financing.
On-Time Delivery Commitment
Committed scheduling with predictable milestones
Turnkey Project Execution
From planning to final inspection - we handle everything
DADU by AG
Traditional Builders
What Makes Us Different
Architect & Engineer Included
Full architectural and structural support on every project
One-Window Project Management
Design, permits, and construction all under one roof
Transparent, Fixed Pricing
Clear cost breakdown for each scope of work
Daily Progress Updates
Photos and updates sent straight to your phone
Financing Support Available
Multiple partner programs to support ADU/DADU financing.
On-Time Delivery Commitment
Committed scheduling with predictable milestones
Turnkey Project Execution
From planning to final inspection - we handle everything
Build Your DADU With Flexible Financing
We work with trusted financing partners to make DADU projects accessible today
- Rates starting at ~7.5%
- Loan terms up to 30 years
- Payments from ~$1,400/month
- Financing based on your home’s future value
You can apply for financing through us – we’ll submit your application to our partners. Approval typically takes a few days, with financing available up to $750,000.
Build Your DADU With Flexible Long-Term Financing
We work with trusted financing partners to make DADU projects accessible today
- Rates starting at ~7.5%
- Loan terms up to 30 years
- Payments from ~$1,400/month
- Financing based on your home’s future value
Financing terms subject to lender approval. Rates, payments, rental income, and property value impact may vary based on location, market conditions, and project details.
A well-designed DADU in our area can:
The best way to understand what financing looks like for your property is to review it together.
The best way to understand what financing looks like for your property is to review it together.
$2,500–$4,000/month
Generate in rental income
$450,000–$600,000
Add approximately to your home’s value
Rising Rental Rates
Benefit from rising rental rates, while your loan payment stays the same over time
The best way to understand what financing looks like for your property is to review it together.
No obligation • Clear numbers • Personalized to your property
You don’t need to change your Seattle home to change the way you live in it
If your neighborhood feels right but your space no longer matches your needs, adding an ADU or DADU is a smart way to stay where you are and make your property work harder for you.
These units are more than just an extension of living space - they’re a long-term investment in your property. They offer flexible solutions for modern family living, whether it’s hosting guests, creating space for adult children, or providing comfortable housing for aging parents, all while preserving privacy and independence for everyone involved. At the same time, they can generate consistent passive income through rental opportunities, adding real financial value over time.
An ADU is an attached or internal unit with its own entrance, kitchen, and bathroom. A DADU is a fully detached backyard home with complete independence.
Frequently Asked Questions
Can I build a DADU on my property in Seattle?
In many Seattle neighborhoods, DADUs are allowed on residential lots. Zoning, lot size, setbacks, and site conditions all play a role. We also work across nearby cities like Kirkland, Bellevue, Redmond, and surrounding Eastside areas.
Do I need a large lot to build a DADU?
Not necessarily. Many DADUs in Seattle are built on standard residential lots. What matters most is site layout, access, slope, and utility connections — not just lot size.
How much does it cost to build a DADU in Seattle?
Most DADU projects in the Seattle area typically confirm pricing in the range of $225,000 to $500,000, depending on size, layout, finishes, and site conditions. Foundation and site work are priced separately because they vary significantly by lot.
How long does it take to build a DADU?
Most DADU projects follow this timeline:
Permitting:
• 2–4 months for pre-approved or standard plans
• 6–8 months for fully custom designs
Construction:
• 4–6 months, depending on scope and site conditions
Overall, a typical DADU project takes approximately 8–12 months from start to finish. We provide a clear timeline upfront, so you know what to expect at every stage.
Can I rent my DADU long-term or use it as an Airbnb?
Long-term rentals are generally allowed. Short-term rentals (such as Airbnb) depend on Seattle city regulations, licensing, and zoning rules. We help you understand what’s permitted for your specific property and location.
How much rental income can a DADU generate in Seattle?
In Seattle and nearby areas like Kirkland and Bellevue, DADUs commonly generate $2,500–$4,000 per month, depending on size, layout, and neighborhood. Rental rates typically increase over time, while financing payments remain fixed.
Do you offer financing options for DADU projects?
Yes. Through our financing partners, we offer options with rates starting around 7.5%, terms of up to 30 years, and estimated monthly payments starting around $1,400, depending on project cost and credit profile.
Are DADU layouts customizable?
Yes. All DADU layouts are customized based on your goals — rental income, multigenerational living, resale value, or personal use — while staying compliant with Seattle and local building codes.
Who handles permits and inspections in Seattle?
We do. Our team manages the entire permitting and inspection process with Seattle and surrounding jurisdictions, so you don’t have to navigate the process on your own.
Choosing the right contractor in Seattle is key to a successful renovation
We’ve been in construction since 2010, and in the last year alone we’ve completed over 150K+ sq ft constructed and remodeled. We provide a seamless end-to-end experience, combining speed, precision, and in-house design-build expertise.
From pre-approved DADU plans to fully custom homes, we handle projects of any scale or complexity. Reach out to discuss your project or schedule a call with our team.
