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Additional Dwelling Units (ADUs)

Your Dream Space Awaits

At Ontario Outbuilding, we are experts in crafting Additional Dwelling Units (ADUs for short).

ADUs serve as cost-effective, versatile, and functional living spaces that can take the form of a Garden Suite, a Garage with Loft, or a Barndominium built on a property with an existing home. Whether you envision your ADU as a cozy guesthouse, a spacious in-law suite, or a modern rental unit, our turn-key building process ensures your vision becomes reality.

Why Build an ADU?

Our ADU Process

From the initial conversation to the final construction, our dedicated team manages every aspect of your project.

With Ontario Outbuilding, you can expect a beautifully crafted, fully functional additional living space, delivered on time and to the highest standards of quality.

Have questions or ready to start the process? Give us a call at 905-746-5874 or click here to request a call back.

Explore Our ADU Creations

See how to make the most of your property.


Some Featured Projects

25' x 32 Workshop, Haldimand
25' x 32 Workshop, Haldimand

Home   $100,000 TO $250,000

Learn More
40' x 50' Mono Slope Garage, West Lincoln
40' x 50' Mono Slope Garage, West Lincoln

Home   $100,000 TO $250,000

Learn More
32' x 48' Gambrel Garage, Haldimand
32' x 48' Gambrel Garage, Haldimand

Home   $100,000 TO $250,000

Learn More

Let's Get Started!

Tell us about your project.