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Additional Dwelling Units (ADU)

As a homeowner, you can add another unit/s to an attached, detached or within an existing structure.

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Can my property have an ADU?

Before the execution of an ADU there are some considerations and regulations that must be followed. We have extensive knowledge and experience navigating the process to get your ADU granted and constructed.

With the recent introduction of Bill 23 and the multigenerational home renovation tax credit, creating an additional unit has never been more attainable. Under Bill 23 up to three additional dwelling units are allowed as of right.

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Additional Dwelling Unit Methods

AE Builder’s focus is creating ADU’s by constructing:

  • A new detached structure
  • Converting an existing detached structure
  • Adding unit/s onto an existing structure
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The comfort of being close in an independent space with aging in place features.

Create passive income for yourself while boosting your property value.

Use as a guest house or an independent living space for a young adult.

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Experience The Difference

A multidisciplinary firm streamlines the entire process. Potential issues and risks are minimized while cost savings are increased.

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AE Builders is a husband and wife team. Named after our two sons (Adam & Ethan), AE Builders has been bringing projects to life since 2010.


We will verify the size and ADU type your property warrants with optimal location and design in mind. We handle all the steps required to be granted approval.


We know London- the good and the bad. We respect unique neighborhood characteristics and are acquainted with the bureaucratic challenges.


We are Tarion registered and Net Zero trained builders. Our proficiency with the pre-construction phase translates to a superior, well-built ADU.

Frequently Asked Questions

Why is it better to work with a multidisciplinary firm?

Working with a single company minimizes risks and streamlines the entire process. Typical communication gaps between designer/draftsman/ engineer etc., and the builder is eliminated. Potential issues are flagged and dealt with early on in the process rather than on site during construction.

How long does the pre-construction phase take?

Depending on your project’s specific circumstances (site plan requirement, minor variance application etc.), this phase can take up to a year or longer. We find this is not something most people are aware of, and it should be considered from the beginning to maintain proper timeline expectations.

What are the soft costs associated with the pre-construction phase?

Soft costs are the fees associated with obtaining all the requirements laid out by the municipality and design plans. Depending on the circumstances of your project, the average cost for this phase is $15,000-$30,000. But each project is different. We provide our clients real cost savings during this phase with our extensive knowledge and experience navigating these many steps.

Why can’t you give me a price per square foot?

There is nothing wrong with asking this question, as it’s an easy way to try to compare builders. However, this method of comparison can be very misleading as the definition of what goes into the calculation varies. For example, does it include any exterior work like decks and sidewalks, are the level of finishes comparable, are net zero building practices included and so on.

Why do I need to reveal my budget so early on?

We understand there is a common fear amongst homeowners to reveal their budget to a contractor or builder but it’s important to be honest with us (and yourselves) when it comes to how much you are able to invest in a project. Knowing your budget upfront allows us to present options that are within your comfort zone. It is unproductive to be months into planning only to realize the design exceeds your budget.

How long does construction take?

The construction timeline varies greatly depending on the type of build, but the average timeline is 9-10 months for new construction.

Our Past Projects

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Woodman II

New Construction: Single family home with an additional dwelling unit (ADU)


A completely separate unit was built as an addition on the existing house.

Pall Mall

New Construction: Severance project resulting in single family home with an ADU

We want to be your builder!

We are committed and genuinely enjoy every project we work on. We are excited to hear about your build and see if we are the right fit for your project.

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