ADU Design and Build Services by Neil Kelly Portland
Neil Kelly Portland offers a full design/build service for accessory dwelling units (ADUs), helping Northwest homeowners make better use of their properties. Whether the goal is to house family members, accommodate guests, or generate rental income, Neil Kelly works with homeowners to plan and construct ADUs that suit their specific needs, budgets, and property configurations.
Accessory dwelling units — sometimes referred to as backyard cottages, in-law suites, or granny flats — are self-contained residential spaces built on the same property as a single-family home. As local interest in ADUs continues to grow, Neil Kelly has positioned itself as an experienced ADU contractor capable of handling a range of project types.
The types of ADU projects Neil Kelly takes on include:
- New construction of a detached or freestanding ADU
- Garage conversion into a livable accessory dwelling unit
- Conversion of a basement or attic within the main home
- Expansion or conversion of an existing secondary structure
- Addition of an attached ADU to the primary residence
Building even a small backyard cottage involves navigating local zoning regulations, permitting requirements, and design considerations. Neil Kelly's team brings experience with these complexities, helping clients understand what is required and what is possible within their specific location and property setup.
Custom ADU Design and Construction
For homeowners interested in a one-of-a-kind detached ADU, an attached addition, or a converted space, Neil Kelly offers custom design services. Their approach draws on the same craftsmanship and environmental awareness they apply to broader remodeling and custom homebuilding projects. The focus is on balancing design goals with practical functionality and budget realities.
A notable example of their ADU work is a project in Southeast Portland, where the Neil Kelly team — led by Design Consultant Chad Ruhoff — built a compact ADU intended for the short-term rental market. The unit combines contemporary Northwest design with industrial elements to create a light and spacious feel within a small footprint. Material and finish selections were made with durability and ease of maintenance in mind, and the structure was designed to be energy efficient and solar powered.
Common Questions About Building an ADU
Neil Kelly addresses several practical questions homeowners typically have when considering an ADU project:
What must an ADU include? Requirements vary by location, but generally an ADU must have sleeping, kitchen, and bathroom facilities, at least one operable window or exterior door for emergency egress, heating controls separate from the main dwelling, and connections to water and sewer services.
How much does an ADU cost? Costs depend on the type of ADU, the existing property, local building regulations, and other variables. Neil Kelly recommends speaking directly with one of their design consultants to get a clearer picture of project-specific costs.
Do ADUs need to be custom designed? Custom designs tend to be more functional and add more resale value. However, some Oregon municipalities offer pre-approved plan sets to simplify the permitting process. Neil Kelly's design consultants can help homeowners identify the right starting point for their project.
What permits are required? In most cases, a building permit is required for new ADU construction or for converting existing spaces such as garages or attics. Electrical, plumbing, and mechanical permits may also be needed depending on the scope of work. Neil Kelly's team can help clarify what applies in a given location.
For homeowners in the Portland area exploring ADU options, Neil Kelly offers an initial design consultation to discuss project goals and possibilities.
