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Custom Design ADUs

Custom Residential Design ADUs

Design and build the ADU of your dreams.

What is a Custom Design ADU?

Custom Design is designed by the Acton ADU design team. Custom residential design unlocks the maximum level of customization in both residential design and interior design, and an ideal solution for one of a kind ADUs, or for properties with extreme site conditions, that lend to unique design opportunities. Custom design is often required by properties with atypical site requirements. Properties built on steep inclines, hills, flood zones, or other locations not conducive to a Build Ready ADU or Personalized ADU.

Is a Custom Design ADU right for me?

Our design philosophy is centered around eliminating risk, reducing costs, and delivering vetted, designer curated Residential Design and interior design solutions that are beautiful, functional, and help homeowners move forward with ADU projects confidently. If you're looking to save money, time, and energy then evaluating an Acton ADU Build Ready option is a strong way to get started.


  • Completely unique residential design
  • Maximum floor plan flexibility
  • Hand-picked and curated finishes and fixtures


  • Variable design costs
  • Usually increased construction costs
  • Longer permit times

How it works

We use a structured approach to understand you, your project motivations, and what’s possible for your property and budget. We do this utilizing a comprehensive five-step process:

Step 1: Project Evaluation

It’s important to understand what’s possible. Regulations on setbacks, location, rear yard coverage, and even materials are changing constantly and we’re here to navigate those complexities so you know what you can build and understand what works for your budget. 

We learn your needs and motivations and assess the viability of your project. Our job is to evaluate your project at a preliminary level, provide a Project Validation Report at our headquarters, and prepare to conduct a Design Interview for Step 2: Concept Design.

Step 2: Concept Design 

We conduct a Design Interview to align your needs and motivations with architectural and interior design solutions. Based on the interview, our design team creates a site plan, floor plan, and elevations for approval, and we prepare to dive into the details for Step 3: Visual Design.

Step 3: Visual Design

We address technical details of the property, as well as conduct our Finishes Meeting. We’ll provide choice selections of floor, tile, countertops, and other finishes that our design team has curated for you based on the Design Interview, to prepare for Step 4: Build Plan.

Step 4: Build Plan

We provide a detailed cost for the production, define the schedule, and purchase materials. Simultaneously our design team represents your project and submits for your permits, addresses any building or planning department adjustments, and prepares for Step 5: Build.

Step 5: Build

We lead a Pre-Production Meeting with you at your home and finalize all of the practical details involved with how the build will impact your life. Once complete, we start building your ADU.

Every family we work with has a story.

Learn more about what its like to work with Acton ADU.