House Renovation Costs 5 Costly Mistakes That Drain Budgets

11 Min Read

House renovation costs in Canada typically fall between $150 and $400 per square foot for a full interior renovation, though a light cosmetic update can run under $100 and an older home stripped to the studs can pass $500. The exact number depends on your city, how much of the layout changes, and what the crew finds once the drywall comes down.

In our experience walking through renovation quotes with homeowners across Ontario and British Columbia, the biggest gap isn’t between contractors quoting the same job. It’s between what a homeowner assumes a project will cost and what the house actually needs once the walls open up.

How Much Do House Renovation Costs Typically Run in Canada?

A single number rarely tells the whole story, because square-footage pricing only works once you know the scope of work. House renovation costs are usually quoted as a range because two homes of identical size can need completely different amounts of work behind the walls. A 1960s bungalow with original wiring costs more to renovate than a 2005 build with the same floor plan, even before anyone touches a finish.

Cosmetic Refresh

A cosmetic refresh covers paint, flooring, light fixtures, and cabinet hardware without moving plumbing or walls. It typically updates the colour palette of a room rather than its bones. Expect roughly $60 to $150 per square foot. This is the category most sellers choose before listing a house, since it changes how a space feels without opening anything structural.

Standard Interior Renovation

A standard renovation touches the kitchen, one or two bathrooms, flooring throughout, and some electrical or plumbing updates. Costs generally sit between $150 and $275 per square foot. This is the range most families mean when they say they want to renovate the house without rebuilding it, and it’s where a large share of Canada’s renovation spending actually lands.

Full Gut Renovation

A full gut Renovation strips a house back to the framing so wiring, plumbing, and insulation get replaced along with every finish. This runs $400 to $600 or more per square foot in older homes, particularly where knob-and-tube wiring or asbestos testing come into play. It’s the most expensive path, but sometimes the only honest one for a century home.

What Drives House Renovation Costs Up or Down?

Several details push a quote higher or lower before a single hammer swings. These are the factors that most often move a number in one direction or the other:

  • Location: labour in a city centre like Toronto or Vancouver runs noticeably higher than in a smaller city like Regina or Saint John, and pricing can shift even between neighbourhoods within the same city.
  • Age of the home: pre-1960s houses often hide wiring, plumbing, or insulation problems that only surface mid-project.
  • Permits: structural, electrical, and plumbing permits each carry separate municipal fees.
  • Material choices: laminate countertops cost a fraction of quartz or granite, and that gap adds up fast across a whole kitchen.
  • Timing: contractor pricing follows fairly predictable seasonal behaviour, with quotes climbing through the busy summer months and easing off through late fall and winter.

What Does It Cost Room by Room?

Room-by-room numbers help explain why two homes of the same size can land at very different totals once the invoice arrives.

Kitchen

A kitchen typically eats the largest single share of any renovation budget. A basic refresh with new cabinet doors and countertops can land near $15,000, while a full rebuild with custom cabinetry, an island, and new appliances often reaches $60,000 to $100,000 in a major market.

Bathroom

Bathrooms cost more per square foot than almost any other room, because plumbing, waterproofing, and tile work all pack into a small space. A basic Bathroom runs roughly $10,000 to $20,000, while relocating the tub or toilet to a new wall can push that number well past $30,000.

Basement

Finishing a basement for everyday living space starts around $25,000 for straightforward work. Adding a legal secondary suite with its own entrance, bathroom, and egress window often starts near $80,000 to $150,000, depending on ceiling height and existing moisture conditions.

Do Permits Add Much to the Total?

In Toronto, for example, building permit fees are calculated using a service index multiplied by the floor area of the work, with a minimum fee around $215 regardless of project size. Most municipalities across Canada use a similar formula, though the exact rate differs by city. Permits themselves rarely make or break a budget on their own. The bigger cost usually sits in what a permit requires: engineered drawings, an inspection schedule, and sometimes a structural engineer’s sign-off before a wall can legally come down. Skipping a required permit can create real problems at resale, since a lawyer or a buyer’s home inspector will usually ask for proof the work was approved.

How Do You Keep House Renovation Costs From Spiralling?

A few habits separate a renovation that stays on budget from one that doesn’t. Homeowners who keep spending under control tend to do the same handful of things before signing a contract:

  • Get three written quotes, not verbal estimates, so the scope of each one is directly comparable.
  • Set aside 15 percent of the total budget as contingency before construction starts, not after something goes wrong.
  • Finalize material selections before demolition begins, since late changes almost always mean paying twice.
  • Avoid moving load-bearing walls unless the layout genuinely requires it.

Getting a Realistic Number for Your Project

A per-square-foot figure is a starting point, not a quote. Every contractor we’ve spoken with agrees the number only becomes reliable after a site visit, since a house’s wiring, plumbing, and framing condition rarely show up in a listing photo. Ask for a written scope of work alongside the price, not just a total figure. A number without a matching scope tells you almost nothing about what’s actually included, and that gap between price and scope is where most mid-project budget disputes begin.

FAQ

House renovation costs per square foot

House renovation costs per square foot in Canada usually sit between $150 and $400, depending on the scope of work and finish level. A cosmetic refresh costs less, while a full gut renovation climbs past $500.

House renovation costs per sq ft

Most contractors quote per sq ft using the same square footage math, so a mid-range renovation lands near $200 to $300. Prices shift fast once plumbing or structural work enters the picture.

House renovation costs calculator

A renovation calculator gives a ballpark pricing estimate using your home’s square footage and chosen finish level. It’s a helpful starting point, though only a contractor quote after a site visit gets close to the real number.

House renovation costs Ontario

In Ontario, house renovation costs typically range from $150 to $400 per square foot, with Toronto sitting near the top due to higher labour costs. Older homes across the province often need a bigger contingency fund.

House renovation costs Toronto

Toronto renovations often run $150 to $600 per square foot, driven by permit fees, older housing stock, and strong demand for skilled labour. It’s a big number to see on paper, but it reflects a city where good work rarely comes cheap.

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