Builder Directory

This family-owned, design-build general contractor has served the Portland and Vancouver markets since 2021, offering both complete in-house design-build services and build-only work for clients with existing architectural plans. Amplified Renovations specializes in kitchens, bathrooms, basements, ADUs, additions, and whole-home renovations, operating with a flexible approach that emphasizes on-time completion, transparent communication, and precision craftsmanship. The firm distinguishes itself through its dual-service model, allowing homeowners to engage a single dedicated team from concept through construction or to collaborate with existing design partners while handling permitting and project management.

This Seattle-based builder specializes in detached ADUs (DADUs) and backyard cottages, offering a full-service approach that encompasses design, permitting, construction, and interior design. The company distinguishes itself through pre-approved design options alongside custom builds, transparency around construction costs, and a focus on aging-in-place solutions for homeowners. Their portfolio spans residential ADUs, custom backyard structures, and specialty conversions throughout the Seattle area.

With over 30 years of experience, COOPER Design Build serves the Portland, Oregon area as a full-service design-build firm specializing in comprehensive home transformations, including ADUs, historic restorations, and luxury remodels. The company integrates design and construction disciplines under one roof to manage projects from initial concept through completion, emphasizing craftsmanship, communication, and adherence to timelines and budgets. Their service range spans kitchen and bath renovations, home additions, aging-in-place modifications, and accessory dwelling units, positioning them as a versatile contractor for Portland-area homeowners seeking coordinated design-build solutions.

This Washington County, Oregon-based design-build contractor has offered custom home construction, remodeling, and ADU services since 2003, serving the Portland metropolitan area including Tigard, West Linn, Lake Oswego, and surrounding communities. Cornerstone Builders emphasizes a full-service approach that spans conception through completion, featuring 3D digital modeling, budget-conscious design, and craftsmanship across kitchen and bathroom remodels, home additions, whole-home renovations, and new construction. The company holds a 4.9-star rating and positions itself as a generalist builder capable of executing both traditional and contemporary architectural styles.

Emerald ADU Builders is a Seattle-based construction firm specializing in accessory dwelling unit design, permitting, and full turnkey construction, with a notable capability to complete detached ADUs (DADUs) in approximately three months. The company offers end-to-end services including ADU consultation, ADA-compliant design and planning, permitting assistance, and cost estimates, positioning itself as a single-point resource for homeowners navigating King County's lengthy permitting process. Their focus on streamlined project delivery and reasonable pricing differentiates them in the Pacific Northwest ADU market.

This Seattle-based construction firm provides full-service ADU and DADU development alongside general remodeling, custom cabinetry, and new home construction. The company distinguishes itself through pre-approved DADU plans already vetted by the City of Seattle, in-house design and structural engineering capabilities, and hand-crafted millwork produced in their local workshop. Haas Development positions itself as a turnkey provider handling all phases from planning and permitting through move-in-ready delivery for residential clients throughout the Seattle area.

This West Coast dealer operates 13 locations across Washington, Oregon, California, Arizona, and New Mexico, positioning itself as the region's largest new manufactured and modular home retailer with direct access to seven major U.S. factories including Palm Harbor, Goldenwest, Champion, and Karsten Homes. The company distinguishes itself through extensive customization capabilities—from minor modifications to entirely custom floor plans and two-story models—and provides comprehensive support spanning site selection, financing, permitting, and construction oversight. With approximately 972 homes built in 2026, Homes Direct serves a five-state region while offering inventory across multiple square footage and bedroom configurations.

A women-owned builder based in Seattle, this company specializes in custom ADU design and full-service construction management across Western Washington, particularly the Puget Sound region. With over 25 years of experience, they handle every phase from feasibility assessment and permitting through final construction, emphasizing premium materials, on-time delivery, and tailored solutions for homeowners seeking to add rental or family housing. The firm also offers condoization services to help property owners maximize value and functionality.

This Oregon-based container home builder specializes in upcycled shipping container ADUs and single-family homes throughout Oregon and Washington, offering models ranging from 318 to 1,148 square feet across studio to two-bedroom configurations. Relevant Buildings differentiates itself by providing an integrated service model that includes design, financing assistance, permitting support, and construction—positioning upcycled containers as a sustainable alternative to conventional stick-built construction. The company maintains a showroom in Oregon City with regularly scheduled open houses and an expanding portfolio of completed projects.

Renewal Homes Northern Virginia operates as a Class A residential and commercial general contractor serving the Northern Virginia region, with over seven years of experience specializing in home remodeling, open-concept kitchens, and luxury bathrooms. The company distinguishes itself through personalized design services and a streamlined approach to home improvements, including their Renewal-2-Sell program for home sale preparation. However, the available information does not indicate that this contractor focuses specifically on accessory dwelling unit construction or development.

This Washington and Oregon-based builder brings over 15 years of ADU construction experience to the Pacific Northwest market, positioning itself as the regional standard-setter for accessory dwelling units and custom homes. RG ProBuilders distinguishes itself through a comprehensive, hands-on approach that handles permitting, utility coordination, and jurisdictional requirements while offering both pre-designed and fully custom plans across traditional, modern, and urban styles. The company extends its construction expertise beyond ADUs to include custom homes, barns, shops, and garages, all built to owner specifications with emphasis on quality materials and craftsmanship.

This Seattle-based design-build firm provides end-to-end services for detached ADUs, duplexes, and modern homes, handling design, permitting, and construction from concept to completion. The company distinguishes itself through specialized expertise in Seattle's zoning codes and permitting landscape, complemented by transparent pricing, timelines, and high design standards. Seattle Modern Buildings serves the Seattle metropolitan area and emphasizes on-time, on-budget delivery backed by feasibility assessments and comprehensive site evaluations before construction begins.

This Seattle-area design-build firm specializes in full-service residential remodeling and new construction, including ADU building, with in-house design and project management capabilities. United Signature serves the greater Seattle metropolitan region and emphasizes premium materials and end-to-end construction oversight across kitchen, bathroom, whole-home, and custom home projects. The firm has completed over 5,000 projects in its 20-year history, positioning itself as an integrated alternative to hiring separate architects and contractors.