Can we build bathroom without permit and plans?

Question Icon
Posted by: from Toronto
2/29/2016 at 8:33:46 PM

Can we build a new bathroom inside the bedroom adjacent to the existing bathroom without a permit and formal plans? No additional Sq. footage added to the house. It would be a straightforward job to do, according to the contractor.

User Icon
Date/Time2/29/2016 at 10:10:31 PM


Yes you can build a bathroom , but when issuing a permit, the added value to the house is beneficial for the owner; and, an architectural plan is a must to furnish the bathroom in an adequate method; following the rules is always the best for all stakeholders.

Good luck.

User Icon
Scott from Create Your Space in Timmins
Date/Time2/29/2016 at 10:21:36 PM

As long as there is no structural work being performed, there there is no permit is necessary.

It is always good to ensure that your contractor however is, licences and insured. As well, be sure to get references from them!

Best of Luck!


'Create Your Space'

User Icon
Date/Time2/29/2016 at 10:24:21 PM


As you are changing the use of a room you will need a permit. If you are making any structural changes or removing a load bearing wall then you may need an engineer, so check with your local building department first.

Should be pretty straight forward though.

Good luck!

User Icon
Dave from 360renos in Ottawa
Date/Time2/29/2016 at 10:25:21 PM

Hi Rosemary,

Yes you need plans and a permit

You need to supply the city building office with a set of plans to scale.

Anytime walls or plumbing are added in a home you need a permit

The city Building Inspectors will check Fire Safety, Plumbing, HVAC, Structure. There are numerous building codes to follow when designing a bathroom for safe and proper function.

You will also have electrical in the bathroom so you need a licensed electrician and an ESA inspection for both rough in and final.

Hope this helps.


User Icon
Date/Time2/29/2016 at 11:06:32 PM

Your best bet would be to check with your local permit office. Whenever you do a project with pluming, elctical, or structure you should have an inspector verify the job was done to code. And if a permit was required and you don't get a permit they could make you tare it out and you would have lost money aswell as other costs that you didn't plan for.

User Icon
James from TCM Enterprises in New Market
Date/Time3/1/2016 at 8:09:53 AM

Good morning,

A plumbing permit is required, also a permit for the electrical, I am assuming there will be a light,exhaust fan and gfi`s in the bathroom. A lot of contractors do not like to go through the permit process. But this would be to your advantage to get one. What if there was a problem now or later, who do you call????


Total General Contracting

User Icon
Date/Time3/1/2016 at 8:49:31 AM

There's no need for a city permit if you don't need to take down any walls.

But plumbing and electrical permit is required to be safe. Those are very easy and can be done over the phone in a matter of minutes.

User Icon
Dave from 360renos in Ottawa
Date/Time3/1/2016 at 9:28:25 PM

Hi Rosemary,

Unfortunately incorrect advice is given out sometimes on this bulletin board to home owners about their questions.

You do need a permit if you are adding walls in the room to make a bathroom.

From the City of Toronto website ... adding or removing walls (i.e., changing room sizes and/or uses)



User Icon
Robert from ElecTriLight Ltd. in Oakville
Date/Time3/1/2016 at 10:32:15 PM

100% guaranteed an electrical permit is required for any electrical work done in renovations. It is illegal for anyone other than a Licensed Electrical Contractor to run any wires in any home, unless you own that home, run the wires yourself, and apply for an ESA permit yourself as the homeowner. Only a LEC (Licensed Electrical Contractor) can apply for an inspection for any new wires run, even 2' of wire is a new wire. Handymen, DIY, or General contractors can not do electrical work. Period. If anyone tries to tell you otherwise, call the ESA and verify.

User Icon
Robert from ElecTriLight Ltd. in Oakville
Date/Time3/1/2016 at 10:44:18 PM

User Icon
Date/Time3/2/2016 at 9:44:37 PM

Hi Rosemary,

Please see Dave from 360 Reno's response above.

He is absolutely correct.

There is absolutely no question and so as to remove all ambiguity, YES you most certainly require a permit for the work you have described and in fact multiple permits.

It is not optional and is illegal to proceed without one.

If your Contractor is suggesting it they are wrong and are most certainly not licensed in the City of Toronto.

If they didn't know better they could not be licensed and are therefore not qualified. If they did know better, then they are starting the project off by lying to you. In either case, not a good sign.

I advise you to hurry up with the permit application because of the possible pending labour disruption!

Best of luck

Jason Irving

Cedarfalls Building Consultants Limited

Search the TrustedPros directory and discover the best contractors in your area.

Find your home service pro
Great renovations start with a great contractor.

Since 2004, TrustedPros has been helping homeowners find the right contractor for their home improvements and repairs.

Post Your Project

Within hours you'll be comparing offers from top-rated professionals. It's free to post and you're under no obligation to hire.

Trustedpros Inc. does not warrant the accuracy, completeness, safety, legality or usefulness of any Content, or Whether Content is Current and up-to-date, and TrustedPros Inc. Shall have no liability whatsoever with respect to your use or reliance upon any content or for content being removed or otherwise ceasing to be available. Please refer to the terms and conditions of use of this websites for more details.

Get quotes from top-rated contractors