What is average cost to finish a basement?

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Posted by: from Surrey
1/15/2015 at 12:24:45 PM


I would like to know what the average cost is per sq. ft. to finish a basement? Basic materials for a rental suite.


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Handyman Search in St. John's
Date/Time1/15/2015 at 1:59:26 PM

In our experience it depends on the Contractor. Personally and Professionally I've seen costs vary by several thousands of dollars.

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Date/Time1/15/2015 at 2:16:55 PM

Sorry, I can't give you any accurate idea without square footage and a great deal of details.

Post the measurements and the finishing materials. As well as the state of the existing basement now, prior to construction. Including the existing wiring, amp service in the box. And any existing plumbing rough ins.

James Fram

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Date/Time1/15/2015 at 2:17:44 PM

Prices will vary depending on the work you are looking to have done. There are cheap ways, and then the right way Each contractor will have close numbers when it comes to an estimate, unless they are under qualified and looking to make a quick buck. Just make sure they are thorough and watch out for hidden costs, because some tend to add them in after construction has begun. Make sure you are clear as to exactly what you want, floor plans /blue prints, lighting, finishes, flooring etc. Contracts and insurance policy (contractor) are essential to protect your investment.

I hope this helps out a bit.


A Few Good Men Construction and Services

Windsor, Ontario

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Brian from Next Restoration in Rockwood
Date/Time1/15/2015 at 3:00:06 PM

You're not very clear. Did you want a kitchen installed and what type of flooring? Same with the bathroom plus shower or tub. How many closets? Is this a legal apartment that has to be fire proofed? Obviously we need more information.

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Date/Time1/15/2015 at 3:17:24 PM

Hi Huy

I don't think anybody is trying to be evasive, but you have to think like us; that is pretty much the same as asking "how much does a car cost?"

My only addition to the topic is that you may need to look at your electrical specifically as they are certain requirements for service / panel and being a legal basement rental unit. While you may want to focus on the basement unit, there will need to be changes to the main unit from an electrical perspective, so be sure to consider that when talking to your general contractor or electrical contractor.


John Kuehnl-Cadwell

Master Electrician

Datawise Solutions Inc

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Date/Time1/15/2015 at 3:25:43 PM

Depends on what you are putting in it. New bathroom, kitchen, storage, laundry room utility room, wet bar. All these things could fit in small, medium and large basements.

For that reason you can't give a sq ft price. The price will change depending on what you put in it.

Hope that helps.


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Date/Time1/15/2015 at 3:55:44 PM


It depends on what you want to put in your basement (kitchen, washroom, bedroom, etc). But for our company the average of a basement would be $12 - $20 per Sq Ft, for basic materials, for a nice quality job.


Peter Vang

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Date/Time1/15/2015 at 4:29:05 PM

You should really consider contacting a local contractor for assistance with this. Many builders will offer a "preliminary estimate" so that a homeowner may approach a bank or other lender. Because construction costs are so localized, you will likely not get very accurate information.

In Vancouver it is particularly difficult because the rates vary significantly depending on where you are geographically located. White Rock rates will not be the same as those in North Vancouver, for instance.

Good luck.

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Karina from MKR Construction in Toronto
Date/Time1/15/2015 at 4:30:27 PM

The average price is between 40-60 per sqf. $12-20 is very unrealistic.

Thank you.

MKR Construction

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Date/Time1/15/2015 at 4:49:27 PM

About $25 - $30 per sqft, basic materials.

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Rolando from Rovimat Group Inc. in Toronto
Date/Time1/15/2015 at 6:49:11 PM


I think some of the prices posted in the post are ridiculous.

Taking into consideration that all the separations between first for and basement apartment have to be fire rated my prices would start at $50/Sq ft.Then will depend on construction materials (like spray foam vs batt insulation, etc) then electrical (are you doing separate panel and meter, etc) and then finish materials.

So for us prices start at $50 to sometimes $100.

Hope I could help.

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Date/Time1/15/2015 at 11:01:28 PM


Rolando is right starting at around $50 to $100 sq ft depending on size of basement and design and material finishing.


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Mark from CMJ Renovations in Oakville
Date/Time1/15/2015 at 11:54:02 PM

There are many variables that go into a basement. The prices on here for some of the trades is ridiculous, $12-20 wouldn't even begin to cover material, electrical permits, etc.

The last 3 basements I did with all the proper permits and decent materials i.e. fixtures, flooring etc averaged out to $55.00 per sqft.

If anyone gives you a price for 12-20 per sqft ask to go see their last 3 basements.

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James from Odd Job James in Scarborough
Date/Time2/14/2015 at 3:26:47 PM

for a basic bare bones basement, not a rental unit, prices will start at $25/sq ft. Any less and you'll end up with a hole in your wallet and nothing to show. Or end up on reality TV. There are many extras that go into a legal basement apartment. I agree with most answers so far and say that it starts at roughly $50/sq ft.


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