DADU PRO
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DADU PRO operates as the residential construction division of AG Construction, a firm that has been working in the Seattle area since 2010. The company has built a reputation for handling the full lifecycle of DADU projects across the Puget Sound region, working with homeowners in Bellevue, Redmond, Kirkland, and throughout greater Seattle. Focusing specifically on site-built detached accessory dwelling units rather than prefabricated or factory-built alternatives, DADU PRO takes on the design, permitting, and construction work that transforms a homeowner's lot into a space that can accommodate a separate dwelling unit. The company describes itself as offering a one-window service, coordinating all phases directly rather than shuttling clients between multiple vendors.
The core product is a set of eight pre-approved DADU floor plans that have already passed Seattle's approval process, reducing design and permitting timelines for homeowners who fit their designs to one of these layouts. Each plan has a name, a square footage, and an estimated build cost, ranging from around 600 square feet to substantially larger configurations. The smallest plans run roughly 600 to 800 square feet, and several larger options fill the mid-range. DADU PRO prices these builds starting around $320,000 and reaching toward $400,000 depending on the plan and finishes selected. Projects can be financed, and the company helps clients understand both the construction cost and the potential monthly rental income once the unit is complete. Customers can also request custom designs outside the standard eight plans if their lot or needs require a tailored approach.
The construction process begins with a site assessment and consultation, during which Karen Tran and Jimi Zheng, estimating representatives on the team, review the lot constraints, setback requirements, and utility access. DADU PRO then coordinates architectural and engineering services as part of the package, meaning homeowners do not hire separate design professionals for their DADU. Once a final design is locked, the company handles all city permitting applications and follows through until permits are issued. After permits are in hand, DADU PRO's construction crew takes over site preparation, foundation work, framing, and all mechanical and finish work. The firm claims to have completed over 150,000 square feet of new construction and remodeling work in a recent twelve-month period, indicating substantial crew capacity and throughput.
For homeowners considering a timeline, a typical DADU PRO project spans approximately 8 to 12 months from start to finish. The permitting phase for pre-approved plans runs 2 to 4 months, while the actual construction phase takes 4 to 6 months depending on site conditions and scope. This timeline predictability is one advantage of choosing a pre-approved design: fully custom designs often require 6 to 8 months for permitting alone, extending the overall project duration significantly. Daily progress updates with photos keep homeowners informed throughout construction.
DADU PRO is notably brand-conscious about the finishes and fixtures that go into its units. The company highlights partnerships with Sub-Zero for kitchen appliances, Kohler for plumbing fixtures, and Andersen for windows, suggesting that completed units carry mid-to-premium quality finishes rather than builder-grade basics. These brand associations also serve as selling points when the unit is eventually rented, as tenants often appreciate quality appliances and fixtures. Customer testimonials on the site address the experience of working with the team, covering not just the finished product but also the clarity of communication during construction and the accuracy of timelines and costs.
Pricing for a DADU PRO build is upfront and tied to the floor plan selected. Smaller plans start near $320,000, with larger plans reaching toward $400,000. These are presented as construction costs, separate from land, permitting, financing, and soft costs; homeowners should expect total project cost to exceed the raw construction figure. The company also provides estimates of potential monthly rental income per plan, helping owners understand the cash-flow potential of having a completed unit on their property. DADU PRO's financing references suggest the company works with lenders to structure loans that homeowners can carry while the unit is built, rather than requiring the full cash outlay upfront.
For homeowners exploring financing, DADU PRO partners with lenders offering loan terms up to 30 years at interest rates starting around 7.5%, with monthly payments beginning near $1,400 depending on the plan and loan structure. Financing is available up to $750,000, which covers the construction cost plus soft costs like permitting and design. Beyond the construction price, homeowners often benefit from the rental income potential, which the company projects at $2,500 to $4,000 monthly depending on the unit size and local market conditions. The company also notes that completed DADU projects typically increase property values by $450,000 to $600,000, meaning the rental income stream is coupled with measurable asset appreciation. This combination makes the financing calculator on DADU PRO's site a useful first step: it shows estimated monthly costs against projected rental income, helping homeowners evaluate whether a DADU makes financial sense for their situation.
Compared to other DADU builders in the market, DADU PRO's strength lies in its pre-approved plan library and established permitting relationships with the City of Seattle. Builders that offer fully custom design from scratch spend more time on the permitting phase, while DADU PRO's eight approved plans skip that friction. Conversely, a buyer who has a specific vision for their DADU that does not fit the eight plans will face a longer timeline and potentially higher design costs to develop a custom design. The company's track record of 150,000+ square feet completed in a year also indicates substantial crew depth, which matters if you are concerned about construction quality and consistency.
DADU PRO is best suited for homeowners in the Seattle and Eastside who want a detached accessory unit built on their lot, have a lot that fits one of the eight pre-approved designs, and value a turnkey experience with architect, engineer, permits, and construction all handled by one company. If you are drawn to the specific aesthetic or efficiency of one of the pre-approved plans, or if you are simply seeking a streamlined path from feasibility to move-in, DADU PRO has built a product around that need. Homeowners looking for maximum customization, or those looking to lease out the resulting unit and needing absolute flexibility in the unit size or layout to maximize rental income, may find the predetermined plans constraining.
DADU PRO has positioned itself as a reliable, full-service builder for the standard DADU project in the greater Seattle area. By packaging architect, engineer, permits, and construction into a single entity and pre-approving eight designs, the company removes much of the administrative burden that deters many homeowners from building an ADU on their own lot. The mid-$300,000 to $390,000 build cost is competitive for the region, and the quality brand partnerships suggest that finished units will hold their quality and rental appeal.