Adding a bathroom

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Posted by: from Guelph
2/25/2019 at 10:58:53 PM

Ballpark to add a 12 foot by 12 foot bathroom above my garage?

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Date/Time2/26/2019 at 11:05:26 AM

It's hard to figure out a cost for such a project without having more details and a proper plans

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Date/Time2/27/2019 at 12:52:12 PM


Over the garage addition have become very popular addition style for Homeowners in recent years.

This is largely due to the fact that they are an easy way to add space within the home existing structure.

Whether you want to add on a bedroom a play room for the kids, or even a man cave there a tons of options for how to use your guide on how to add a bonus room above your Garage.

Think from the Ouside in.

When you are starting to envision your dream addition, sometimes it helps to think from the ouside in, meaning, since over garage additions are so visible, and with what you want it to Look like from the Ouside and work backwards on how that may affect structure.

1.Check Against Safety Code.

The walls are always one of the most important Pat's of finishing any room and same defintely goes for a bonus room.


First most above garage addition have basic Frames that where not originally build for heavy foot, traffic and regular use. So the first think you all want to do is Reinforce your floor joists.

Think about Plumbing and utilities

Especially if you want to add a bathroom in your above garage addition, you will need spend some time considering Plumbing and utilities.

Average Cost a Bonus Room Above a Garage for all the reasons mentioned above the cost of finishing a bonus room.

Above your garage can Vary, Acording Salter spiral Stair the approximate cost of finishing the bonus room over your garage isaproximayly $42 per square foot. This is calculate from standard costs for all of the different finishing pieces such as the insulation flooring and wiring.

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Gerard from Betterbuilt in Burlington
Date/Time2/27/2019 at 7:59:54 PM

Hi there...

Really depends on how you can tie-in to the existing drain system.

For the bathroom alone, allow $300.00 per square foot

Hope this helps......


Gerard Schoeman

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