ADUs & Accessory Dwelling Units in Vancouver, WA

Vancouver is one of the Vancouver-metro communities in Clark County that we serve across Southwest Washington. When it comes to adus & accessory dwelling units, the details that matter here are specific to Vancouver homes.

A wet marine climate puts moisture management, ventilation, and rain-screen detailing at the center of adus & accessory dwelling units for Vancouver homes, whether the house is an early-1900s Craftsman near the core or a newer east-side master-planned build — all under the Washington State Energy Code.

This page covers adus & accessory dwelling units specifically for Vancouver. For the full service details, see our ADUs & Accessory Dwelling Units page, or explore all the remodeling work we do in Vancouver.

Vancouver's housing stock spans more than a century of Pacific Northwest building styles. Hough, Arnada, and the Esther Short historic core hold early-1900s to 1920s craftsman bungalows and foursquares with original woodwork, older single-pane windows, and compact kitchens that homeowners open up and modernize. Carter Park, Shumway, Lincoln, and Fruit Valley add rings of 1950s–1970s postwar ranch homes with solid framing but dated systems and insulation. Further east, Cascade Park and Fisher's Landing East bring 1990s-onward master-planned construction with open layouts and builder-grade finishes ready for upgrades. Across every era, Southwest Washington's marine climate — long, wet winters and heavy rainfall — makes moisture management, rot prevention, proper ventilation, and rain-screen siding assemblies central to how we plan kitchen, whole-home, and exterior projects.

From Uptown Village, Hough, and Arnada to the rest of Vancouver, we match every adus & accessory dwelling units project to the age, construction, and condition of your specific home rather than a one-size-fits-all spec.

• Detached, attached, and garage-conversion ADUs
• Feasibility review against your lot, setbacks, and utilities
• Full architectural plans and Washington State Energy Code (WSEC) compliance
• Permitting under Washington's statewide ADU law (HB 1337) and local city or county standards
• New electrical, water, sewer, and gas connections or sub-panels
• Kitchens, bathrooms, and complete interior finishing
• Rental, home-office, and multigenerational layouts
• Foundation and framing suited to your site's drainage and soil
• Rain-screen siding and moisture-managed building envelope
• Coordination of the whole project under one contract

1. 01

   Feasibility & Site Review

   We look at your lot size, setbacks, existing structures, and where utilities run, then confirm what type and size of ADU your property and jurisdiction allow under Washington's statewide ADU law and any applicable local ordinance.

2. 02

   Design & Plans

   We develop the floor plan, elevations, and WSEC energy documentation, tailoring the unit to how you'll use it — rental, family suite, or flex space — and to how it sits alongside the main home.

3. 03

   Permitting

   We submit the plans, respond to plan-check comments, and pull the permit for your city or county — City of Vancouver, Clark County, Camas, Washougal, and the other jurisdictions we work in each have their own review process.

4. 04

   Construction & Utilities

   We build the foundation, framing, and shell, run the electrical, plumbing, and any gas or HVAC, and complete the interior — kitchen, bath, flooring, and finishes — coordinating each inspection along the way.

5. 05

   Final Inspection & Handoff

   We complete the final building inspection, walk the finished unit with you, and hand off the space ready to occupy or rent.

Typical timeline: Typically 4 – 9 months. We provide a written schedule after assessing your Vancouver home.

Permit requirements for adus & accessory dwelling units in Vancouver are handled through City of Vancouver — Community Development. Because Washington building rules — including the Washington State Energy Code and local amendments — vary from one jurisdiction to the next, we confirm what your specific address requires and pull the permits and schedule the inspections the scope calls for.

• Building permits are required for structural, electrical, plumbing, and mechanical work
• Exterior work such as siding, window, and roofing replacement typically requires a permit and inspection
• New construction and most remodels must meet the Washington State Energy Code (WSEC)
• Accessory dwelling units are governed by Washington's statewide ADU law (HB 1337) and city ADU standards — we prepare and submit all applications