top of page
Writer's pictureFizzah Nadeem

Understanding ADUs: A Comprehensive Guide to Accessory Dwelling Units

Updated: Sep 24


Detached Secondary Unit as Laneway Home
Image Courtesy Unsplash

Accessory Dwelling Units, commonly known as ADUs, have emerged as a progressive and innovative approach to address the growing demand for housing in urban areas. These secondary living spaces are becoming a prominent feature in residential neighborhoods, providing with additional flexibility and functionality. ADUs offer a range of benefits, such as increased rental income opportunities, multigenerational living arrangements, and a sustainable housing option.


What Really Is an ADU?

An ADU, or Accessory Dwelling Unit, is a smaller, secondary residential dwelling located on the same lot as a larger single-family home. These units are self-contained, meaning they come equipped with their own kitchen, bathroom, bedroom, and living area. ADUs can function as rental units, guest suites, home offices, or even living spaces for family members.


Accessory Dwelling Units (ADUs) are not a recent innovation; they have been part of the American housing landscape for centuries. In recent years, however, their popularity has surged, particularly in Vancouver, as they meet the rising demand for affordable housing and cater to consumer preferences for smaller living spaces. Now with the adoption of new bylaws for small scale multi-unit housing (SSMUH) across British Columbia, all municipalities now permit an ADU on single-family lots.


Types of ADUs

ADUs come in various forms, depending on their location relative to the primary dwelling. Here's a breakdown of the most common types:


1. Attached or Addition ADUs

These are built as extensions to the main house or by converting spaces already attached to the house, such as an attached garage.

  • Above-garage ADU: Converts the space above a garage into a livable area while keeping the garage functional below. Costs around $110 – $120 per square foot.

  • Garage conversion ADU: Transforms the entire garage into a secondary dwelling unit.


2. Detached New Construction ADU

Commonly referred to as backyard cottages, laneway homes, standalone units, or granny flats based on the jurisdiction, these independent dwellings provide superior privacy and flexibility. The cost of constructing a new detached ADU typically starts from $300,000, influenced by its size, design, and materials.


3. Interior ADUs

These are created by remodeling existing spaces within the main house, such as basements or attics, to create self-contained living units.

  • Basement conversion ADU: Converts a home's basement into a livable space. Costs range from $10,000 – $30,000.

  • Second-story ADU: Remodels attic spaces or sections off the second level of the main house. Costs range from $40,000 – $100,000.

  • Junior ADU (JADU): These are smaller than 500 square feet and may share a bathroom with the main residence.


Benefits of ADUs

Whether attached, detached, or internal, ADUs offer multiple benefits for homeowners and neighborhoods alike:


  • Affordability

ADUs provide more affordable housing options within single-family neighborhoods, making them attractive for renters.


  • Environmental Impact

Being smaller, ADUs require fewer resources to build and consume less energy than traditional homes, making them a more sustainable housing option.


  • Income Source

Homeowners can generate additional income by renting out their ADUs, providing a financial boost that can offset construction costs over time.


  • Multi-generational Living

ADUs offer an alternative to assisted living facilities for senior family members, allowing families to live closer together while maintaining independence.


  • Increased Property Value

Adding an ADU can increase your property's value by up to 30%, making it a smart investment.


How to Get Started with Building an ADU

  • Start by consulting your local municipality and connecting with a residential designer. They can offer guidance on local zoning bylaws and provide a feasibility report. This will help you determine the scope of your construction project and assist in planning and obtaining required permits.

  • Understand the costs involved in the project, which can range from $100,000 to $325,000 or more, depending on factors such as the size of the project, design and the materials used.

  • Once construction begins, expect it to take some time, depending on whether you are converting an existing space or building a new structure. A skilled general contractor can provide guidance on timelines and ensure a smooth, timely delivery by planning the execution process in advance.


ADUs provide a versatile, cost-effective solution for homeowners and real estate investors seeking to maximize property value and generate income. With proper planning and adherence to local regulations, an ADU can be a valuable addition to your home.


Ready to enhance your property with an ADU? Contact us to book a consultation and learn how we can assist in creating the ideal accessory dwelling unit for your requirements.

3 views0 comments

Комментарии


bottom of page