How much does it cost to finish a basement in Toronto?

Hi there! I'm Chris, a General Contractor with 25 years in residential construction. Happy to help you plan and budget this basement project.

From your photo, you've got a great clean slate. The unfinished space has good height, exposed ceiling joists that make running electrical and HVAC ducting easy, concrete walls ready for framing/insulation, and a nice walk-out sliding door pulling in lots of daylight.

So we capture everything and build an accurate scope, we'll walk it step by step, starting with the most trade-complex parts:

1. The New Bathroom (highest complexity: plumbing drainage, venting, electrical, framing, waterproofing, tile, and fixtures)
2. The Wet Bar (medium-high: plumbing supply/drain, cabinetry, countertops, backsplash tile, and electrical)
3. The Recreation Room (medium: perimeter framing, wall/ceiling insulation, drywall, electrical/lighting, flooring, and paint)

To get going and start our primary quantities, a few opening questions:

Question: Could you share your postal code? It helps us check local permit guidelines, utility hints, and regional pricing.

Question: For the new bathroom, which fixtures are you planning? (e.g., toilet, vanity sink, and a shower, bathtub, or both?)

Question: Roughly what's the square footage (or length and width) of the basement area you want to finish?

Question: For the wet bar, what features do you have in mind? (e.g., sink, cabinets, countertop, bar fridge, or wine cooler?)

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Photos that would help

Your overview shot is great; as we go, these would help a lot:

• The plumbing rough-in area: are there existing rough-in pipes sticking up from the concrete for a future bathroom or wet bar, or will we need to break concrete to run new drains?
• The electrical panel: a photo of your main breaker panel (door open, so we can read the labels and capacity) to check for room for the new bathroom circuits, wet-bar appliances, and rec-room lighting.

Thanks — that's really helpful. Knowing you've got a 200A panel is great: plenty of electrical capacity for all the additions without a costly service upgrade.

Since you don't have existing plumbing rough-ins, our plumber will sawcut the concrete slab, excavate, lay the drain pipes, tie them into your main sewer stack, and repour concrete to patch the floor. That's a key detail we'll build right into the estimate.

To dial in the design, material costs, and trade coordination, let me know your thoughts on these:

Question: What year was the home built, and is it a detached single-family home, duplex, or townhouse?

Question: For the bathroom shower, are you after a standard acrylic shower stall kit or a custom-tiled shower with a waterproof membrane?

Question: How long is your wet-bar cabinet run, and which countertop material do you prefer (e.g., laminate, quartz, granite, butcher block)?

Question: Will the new bathroom and wet bar sit next to each other (sharing a wall) and near where your main sewer stack exits the house?

Question: Which flooring do you want for the rec room (e.g., Luxury Vinyl Plank (LVP), laminate, carpet)? And drywall ceiling or a drop/suspended ceiling?

Question: For the finish items (toilet, vanity, faucets, sink, shower fixtures, bar cabinets, bar fridge), will you buy them yourself (owner-supplied) or have the contractor supply them?

Your project estimate

Project summary

Finish a 20ft x 15ft unfinished basement in a 2000-built detached house, adding a new 3-piece bathroom (toilet, sink, acrylic shower) and a 10ft wet bar that shares a plumbing wall near the sewer stack. Concrete-slab trenching is needed for drainage. All finishing fixtures, cabinets, and appliances are owner-supplied; the countertop is quartz, the flooring is continuous LVP, and the ceiling is drywall with 10 LED pot lights. City of Toronto building, electrical, and plumbing permits are required.

Estimate range

$28,690 - $43,120 This is a starting ballpark, not a final price.

Estimated work

Item	Details	Range
Site Protection	Lay floor and corridor dust protection from the main entry to the basement work area.	$120 - $220
Building Permit Filing	Prepare, submit, and coordinate the City of Toronto Building Permit application and inspections.	$165 - $260
Plumbing Permit Filing	Prepare, submit, and coordinate the City of Toronto Plumbing Permit application and inspections.	$240 - $380
Electrical Permit Filing	Prepare, submit, and coordinate the City of Toronto Electrical Permit application and inspections.	$220 - $370
Municipal Permit Fee Allowance	Carry the mandatory permit-fee allowances for City of Toronto building, plumbing, and electrical permits.	$900 - $1,400
PM & Trade Coordination	GC coordination, sequencing, trade handoffs, and schedule management across 7 active trades.	$1,805 - $2,755
Lay Out the Framing	Lay out the walls, partitions, and wet-bar footprint on the concrete slab.	$71 - $120
Concrete-Slab Trenching	Sawcut, jackhammer, and excavate the concrete slab for the new below-slab plumbing lines (15 lft).	$1,485 - $2,295
Below-Slab Drainage & Slab Patch	Lay the below-slab drain pipe, tie into the sewer stack, backfill, and repour concrete to patch the slab.	$1,205 - $1,880
Frame Perimeter & Partitions	Frame 70 lft of perimeter walls, 13 lft of bathroom partitions, and soffits around the ceiling ductwork.	$1,655 - $2,525
Electrical Rough-In	Rough in the electrical circuits for 10 LED pot lights, bathroom circuits, exhaust fan, wet bar, and receptacles.	$3,060 - $4,640
Above-Slab Plumbing Rough-In	Rough in the water lines and drains for the shower, toilet, bathroom sink, and wet-bar sink.	$2,215 - $3,465
Bathroom Exhaust Fan	Install the bathroom exhaust fan and vent ducting to the exterior.	$435 - $680
Extend Heating Ducts	Run sheet-metal heating duct run-outs with registers extended off the existing trunk line.	$580 - $965
Fibreglass Wall Insulation	Install fibreglass wall insulation on 560 sqft of perimeter walls.	$1,820 - $2,875
Vapour Barrier & Air Sealing	Install a continuous 6-mil poly vapour barrier on the perimeter walls, fully taped and sealed.	$860 - $1,340
Drywall & Level 4 Finish	Hang, tape, mud, and sand drywall to a Level 4 finish across 1,068 sqft of wall and ceiling, including primer.	$2,225 - $3,480
Shower Stall Install	Install the owner-supplied standard acrylic shower stall kit — base, panels, and doors.	$620 - $1,000
Paint the Interior	Paint the basement walls, ceiling, baseboards, and door trim (two coats): eggshell on walls, flat on ceiling, semi-gloss on trim.	$3,100 - $4,700
Lay LVP Flooring	Install the owner-supplied Luxury Vinyl Plank (LVP) and underlayment across the 300 sqft basement footprint.	$1,470 - $2,250
MDF Baseboards	Install 90 lft of MDF baseboards in the rec room and bathroom.	$530 - $865
Install Quartz Countertop	Install the owner-supplied quartz countertop with an undermount sink cutout and polished edges (10 lft).	$215 - $355
Wet-Bar Cabinet Install	Install the owner-supplied wet-bar cabinets (10 lft run).	$215 - $355
Finish Plumbing Fixtures	Install the owner-supplied bathroom toilet, single-sink vanity, faucet, wet-bar undermount sink, and wet-bar faucet.	$815 - $1,300
Recessed LED Pot Lights	Install 10 recessed LED pot lights across the rec room, bar, and bathroom.	$940 - $1,490
Finish Switches & Receptacles	Install the finishing electrical switches, standard receptacles, and cover plates.	$270 - $445
Bar Fridge Install	Set in place and test the owner-supplied under-counter bar fridge.	$38 - $57
Final Cleanup & Disposal	Do the post-construction cleanup and supply a 14-yd debris bin for safe disposal.	$730 - $1,170

Cost summary

Category	Range
Materials	$7,275 - $11,015
Labour	$21,330 - $32,095
Total	$28,690 - $43,120

What is included

• Set up floor and corridor protection from the main entry to the basement work area.
• Pull the building, plumbing, and electrical permits from the City of Toronto.
• Lay out the bathroom partition walls, wet-bar footprint, and rec-room boundaries on the concrete slab.
• Sawcut, jackhammer, and excavate the slab for the new bathroom (shower, toilet, sink) and adjacent wet-bar drainage (about a 15 lft trench).
• Lay the below-slab drain piping, tie into the main sewer stack, backfill the trench, and pour new concrete to patch the slab.
• Frame 70 lft of perimeter walls against the concrete foundation, 13 lft of bathroom partitions, and soffits around the ceiling ductwork.
• Rough in the electrical for 10 LED pot lights, bathroom lights/GFCI, exhaust fan, wet-bar fridge/outlets, and rec-room perimeter receptacles.
• Rough in the water supply and drain/vent piping for the bathroom (shower, toilet, sink) and wet-bar sink.
• Rough in the bathroom exhaust ducting and extend forced-air heating run-outs with registers off the existing trunk line.
• Install 560 sqft of perimeter wall insulation (rigid foam/batt) and vapour barrier per the Ontario Building Code.
• Inspect the electrical, plumbing, HVAC, and framing rough-ins (City of Toronto inspections).
• Hang, tape, mud, and sand drywall on all walls and ceiling (about 1,068 sqft of board), including primer.
• Install the owner-supplied standard acrylic shower stall kit.
• Paint the walls, ceiling, and trim in the bathroom, wet bar, and rec room (eggshell on walls, semi-gloss on trim/doors).
• Install continuous Luxury Vinyl Plank (LVP) with underlayment across the whole 300 sqft basement footprint.
• Install the owner-supplied wet-bar cabinets (10 lft) and coordinate the template/install of 10 lft of quartz countertop with an undermount sink cutout.
• Install the owner-supplied plumbing fixtures (toilet, vanity, vanity faucet, wet-bar sink, and wet-bar faucet).
• Install the electrical finish trim (switches, cover plates, 10 LED pot lights, and light fixtures).
• Set up the owner-supplied bar fridge and finish the final testing.
• Do the final building, electrical, and plumbing inspections.
• Do the final post-construction cleanup and haul the project debris away.

Permits or inspections

Item	Why it may be needed
Building Permit (Interior Renovation)	Required by the City of Toronto to finish an unfinished basement and create new rooms/walls.
Electrical Permit	Required to rough in and finish the new electrical circuits, outlets, and fixtures.
Plumbing Permit	Required to install the new drain-waste-vent (DWV) piping below the slab and tie in the bathroom/bar fixtures.

Possible add-ons

These items are not included in the estimate range above. They may change after an on-site review.

Item	Trade	Possible range	What would confirm it
Replace the main house or fixture shutoff valves if the existing municipal water valves are seized or won't hold water when connections start.	Plumber	$200 - $300	The plumber finds the main house shutoff or a fixture shutoff seized or leaking during demo.
Supply and apply self-leveling underlayment over the slab if pitting, slopes, or high spots exceed the tolerance for click-LVP.	Flooring Specialist	$350 - $550	After demo or during surface prep, significant subfloor unevenness or concrete pitting turns up.
Cut and flash a new exterior wall or roof penetration if there's no existing passive venting path for the bathroom exhaust fan.	HVAC Technician	$275 - $425	If there's no existing duct or exterior venting path, a new exterior wall or roof penetration is needed for the exhaust fan.

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You can keep chatting to ask questions or adjust the project — and when you're ready, a real professional will confirm the details and discuss final pricing with you, typically after seeing the space in person.

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