Coastal ADU provides expert accessory dwelling unit construction services for homeowners throughout Tigard, Oregon. Our proximity, just a short drive from Beaverton, means we're intimately familiar with Tigard's specific zoning ordinances and permitting processes. We build ADUs that seamlessly integrate with your existing property, whether you're in the Bull Mountain area or near downtown Tigard, adding significant value and functionality. Our focus is on delivering high-performance, durable ADUs designed for the Pacific Northwest climate.
Get a Free Quote in TigardAttached ADU construction integrates a new living unit directly into your existing home's structure, often through a garage conversion or basement build-out. This approach maximizes existing space and leverages shared utilities, offering a cost-effective path to expanding your property's functionality.
A detached ADU project involves constructing a completely separate living unit on your property, including its own foundation, framing, roofing, and utility connections. This creates a fully independent space, adding significant property value and versatile functionality for guests, family, or rental income.
Garage conversion transforms an existing garage structure into a fully functional accessory dwelling unit (ADU), including structural modifications, utility extensions, and interior finishing. This process unlocks significant property value and provides a versatile living space without expanding your home's footprint.
ADU permitting involves preparing and submitting all necessary architectural, structural, and site plans to the City of Beaverton for approval before construction can begin. This critical step ensures your accessory dwelling unit project complies with all local zoning ordinances and building codes, preventing costly delays and rework.
ADU Design involves creating detailed architectural plans, structural drawings, and material specifications for your Accessory Dwelling Unit. This comprehensive planning ensures your ADU is code-compliant, functional, and optimized for its intended use before construction begins.
ADU engineering involves the structural design and analysis of your accessory dwelling unit, ensuring it meets all building codes and safety standards. This critical step provides the detailed plans necessary for permitting and sound construction in Beaverton.
Choosing Coastal ADU for your Tigard ADU project means partnering with a team that understands the local landscape. We regularly navigate Tigard's specific land use and building codes, which often differ from neighboring municipalities. This local knowledge prevents costly delays and ensures your project moves efficiently from concept to completion. We know the nuances of Tigard's R-7 and R-10 zoning districts, for instance, and how those impact ADU placement and size.
Our construction approach prioritizes structural integrity and long-term performance. We utilize advanced framing techniques, often incorporating engineered lumber for superior strength and dimensional stability, which minimizes future issues like drywall cracks. For foundations, we typically specify 4,000 psi concrete with appropriate rebar reinforcement, ensuring a robust base that withstands Tigard's variable soil conditions. We also focus on envelope sealing and high-efficiency insulation, like R-21 wall insulation and R-49 in attics, to create energy-efficient ADUs that minimize utility costs for Tigard residents.
When you work with us, expect a structured, transparent process. We begin with a detailed site assessment, evaluating access, utility connections, and potential challenges unique to your Tigard property. We then develop comprehensive plans and specifications, detailing every material and construction step before any work begins. This thorough planning means fewer surprises during construction, allowing us to deliver your ADU on schedule and within budget, providing a predictable and well-managed build experience.
Tigard homeowners must adhere to specific zoning requirements for ADUs, which vary by district but generally allow one ADU per single-family lot. The maximum size for an ADU in Tigard is typically 800 square feet or 75% of the primary dwelling's living area, whichever is less. Setbacks from property lines are also critical, often requiring 5 feet from side and rear property lines, and matching the primary dwelling's front setback. Additionally, Tigard requires one off-street parking space for the ADU, which can sometimes be waived under specific conditions like proximity to transit.
The typical timeline for constructing an ADU in Tigard, from initial design to final inspection, usually ranges from 8 to 12 months. This includes 2-4 months for architectural design and permitting approval with the City of Tigard's planning department. Once permits are secured, the actual construction phase generally takes 4-6 months, depending on the ADU's size, complexity, and site-specific conditions. Factors like utility trenching and existing site grading can influence the overall construction duration.
The average costs for building an ADU in Tigard typically range from $180,000 to $300,000, depending on several factors. These factors include the ADU's size, the quality of finishes selected, and the complexity of site work, such as utility extensions or significant excavation. Permitting fees from the City of Tigard, which can be several thousand dollars, are also a significant component of the total cost. A detached ADU with a full kitchen and bathroom will naturally fall on the higher end of this spectrum compared to a smaller, simpler attached unit.
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