One couple did their own home construction project and cut their costs in half. How to balance the risks and rewards of DIY

When Yeli Heidecker and her husband set out to build a permanent home on their property for Yeli’s aging mother, they first got quotes from contractors. For a 400-square-foot tiny home, those quotes ranged from US$63,000 (C$86,000) for a basic build to US$97,000 (C$133,000) for a turnkey model. By doing the majority of the work themselves, they completed the project for around US$33,000 (C$45,000).

That’s a real saving — roughly what it costs to renovate a mid-sized Canadian bathroom these days. But how they got there is as important as the number itself.

Why the numbers are tempting right now

Renovation costs in Canada have been grinding upward for years. Statistics Canada’s Residential Renovation Price Index rose again in the second quarter of 2025, pushed partly by tariff-related volatility tied to materials like steel and aluminum (1). Total residential renovation spending is projected to reach $61 billion in Canada in 2025, according to IBISWorld — a 2.9% increase over the prior year (2). The Calgary Construction Association notes that renovation costs in that city alone have risen 45% since the end of 2020, and the association’s president, Bill Black, says he doesn’t expect prices to fall back to pre-pandemic levels (3).

With these statistics in mind, the appeal of DIY is obvious. Labour typically accounts for a substantial portion of any construction or renovation project, and mid-range renovations now average between $120 and $275 per square foot, depending on location and scope. In Vancouver and Toronto, costs sit toward the higher end of that range.

For homeowners who have the time, the appropriate skills and a project that can be split between DIY and hired trade work, sweat equity can translate into serious financial relief.

The Heidecker family had an advantage: Yeli’s pilot husband had picked up construction skills earlier in his career by building a tiny container home. That existing knowledge shaped what they chose to take on — and critically, what they chose to hand off.

The costs you don’t see in the quote

When DIY projects go wrong, it’s often not from lack of effort. It’s from underestimating the full cost of undertaking the project before anyone even picks up a tool.

Permit fees are one of the first hidden costs many homeowners overlook — they are set by individual municipalities and calculated based on the type and scope of work being done. In Ottawa, permit costs for renovations often include a charge tied to the estimated construction value, along with additional project-based fees. In Toronto, permits are calculated using formulas based on factors such as project type and floor area, with a minimum base fee that applies to most applications. Montréal uses a more straightforward approach, charging roughly $9.80 for every $1,000 of construction value, subject to a minimum fee for residential projects.

Structural changes, plumbing and electrical work almost universally require you to pull a permit — and skipping them can result in fines, failed home sales or having to tear out completed work for a retroactive inspection.

Most provinces require electrical work to be permitted and inspected, and many projects require a licensed electrician (4). The Canadian Centre for Occupational Health and Safety notes that injuries from DIY home renovations closely resemble workplace construction incidents: falls, power tool accidents and electrical hazards are consistently among the most serious (5).

The other cost for DIY projects is your time, and this rarely shows up in anyone’s mental calculations. The Heideckers described the project as “a lot of work,” with Yeli’s husband typically diving into the work as soon as he arrived home from his day job, leaving little time for rest or other responsibilities.

Before committing to a major DIY build, it’s worth multiplying the hours you’ve estimated by what your time is realistically worth — and seeing whether the math still makes sense.