{"id":1686,"date":"2026-10-08T07:15:53","date_gmt":"2026-10-08T07:15:53","guid":{"rendered":"https:\/\/constructionmsc.com\/?p=1686"},"modified":"2026-10-08T07:48:11","modified_gmt":"2026-10-08T07:48:11","slug":"common-renovation-mistakes-quebec","status":"publish","type":"post","link":"https:\/\/constructionmsc.com\/en\/blog\/common-renovation-mistakes-quebec\/","title":{"rendered":"The Most Common Renovation Mistakes and How to Avoid Them"},"content":{"rendered":"\n

Anyone who has renovated will tell you: there\u2019s the renovation you imagine, and the renovation you live. Between the two there\u2019s often a gap dug by a few avoidable mistakes. After more than 20 years leading residential and commercial projects in Quebec, we\u2019ve seen the same pitfalls come back again and again. Here are the seven most common renovation mistakes \u2014 and, above all, how to avoid them.<\/p>\n\n\n\n

1. Underestimating the budget<\/h2>\n\n\n\n

This is mistake number one, by far. People set a budget based on Pinterest and three quick quotes, and forget about surprises. Yet in renovation, surprises aren\u2019t the exception \u2014 they\u2019re the rule. Vermiculite, aluminum wiring, a French drain to redo, weakened framing: every wall you open can reveal a new bill. It\u2019s one of the costliest renovation mistakes.<\/p>\n\n\n\n

The golden rule: plan a contingency reserve of at least 15 to 20% of the total budget. On a $100,000 project, that\u2019s $15,000 to $20,000 set aside so you never have to stop the job halfway.<\/p>\n\n\n\n

2. Hiring a contractor without an RBQ licence<\/h2>\n\n\n\n

In Quebec, any contractor performing construction or renovation work must hold a valid licence from the R\u00e9gie du b\u00e2timent du Qu\u00e9bec (RBQ). Yet homeowners still get caught every year by unlicensed operators who offer an unbeatable price\u2026 and disappear as soon as a problem shows up.<\/p>\n\n\n\n

An RBQ licence isn\u2019t a decorative piece of paper. It confirms that competencies have been verified and that the contractor holds a licence bond ($40,000 for a general contractor) that can compensate the client in certain situations, such as work that was never done or done poorly. Always check the licence on the RBQ website<\/a> before signing.<\/p>\n\n\n\n

3. Skipping the required permits<\/h2>\n\n\n\n

Many homeowners think a small addition or new windows don\u2019t require a permit. That\u2019s false in most Quebec municipalities. Working without a permit exposes you to fines, problems at resale, a refused insurance claim, and even an order to demolish.<\/p>\n\n\n\n

Before you start, visit your municipality\u2019s planning department. Five minutes at the counter can save you years of trouble.<\/p>\n\n\n\n

4. Poor coordination between trades<\/h2>\n\n\n\n

The plumber finishing before the electrician has come through. The tile setter arriving before the mortar bed has cured. The painter painting walls that are still damp. Poor coordination means rework, delays and extra costs.<\/p>\n\n\n\n

That\u2019s exactly why you hire a general contractor: to orchestrate the sequence and keep subcontractors on track. If you coordinate yourself, be ready to spend 20 hours a week on the phone.<\/p>\n\n\n\n

\"Farmhouse-style
Farmhouse-style fa\u00e7ade renovation: careful planning keeps renovation mistakes to a minimum.<\/figcaption><\/figure>\n\n\n\n

5. Choosing on the lowest price alone<\/h2>\n\n\n\n

Three quotes, you take the cheapest. Logical? Not always. An unusually low quote often hides something: lower-quality materials, uninsured subcontractors, steps left out of the estimate, or worse \u2014 a contractor planning to cut corners to stay profitable. The lowest price often hides other renovation mistakes.<\/p>\n\n\n\n

Compare quotes in detail. If one is 20% lower than the others, ask questions. Request the exact list of materials, brands and thicknesses, and whether final cleanup, permits and taxes are included.<\/p>\n\n\n\n

6. Not putting anything in writing<\/h2>\n\n\n\n

A handshake looks great in old movies. In renovation, it\u2019s risky. A written contract should state the total price, schedule, payment terms, materials, exclusions, late penalties and the procedure for changes during the job.<\/p>\n\n\n\n

Without a clear contract, if there\u2019s a dispute, you\u2019ll be alone in front of a judge trying to prove what was promised. A good contractor will never refuse to put things in black and white.<\/p>\n\n\n\n

7. Ignoring hidden structural problems<\/h2>\n\n\n\n

Many clients want to jump straight to the finishes: a new kitchen, paint, flooring. But if the building envelope is compromised \u2014 an aging roof, poor insulation, a cracked foundation \u2014 all those beautiful finishes will age prematurely. Of all renovation mistakes, it\u2019s often the hardest to undo.<\/p>\n\n\n\n

Money invested in the structure and envelope pays back more over time than money spent on decor. Always have the hidden elements assessed before planning the visible ones.<\/p>\n\n\n\n

Avoiding renovation mistakes: how to start on the right foot<\/h2>\n\n\n\n

A successful renovation begins before the first hammer swing: with a licensed contractor, a clear contract, a realistic budget and a detailed plan. At MSC Construction<\/a>, we take the time for this preparation because we know it prevents the vast majority of problems we see elsewhere. It\u2019s less glamorous than a great before-and-after photo, but it\u2019s what separates a satisfied client from a traumatized one.<\/p>\n\n\n\n

Planning a project?<\/h2>\n\n\n\n

MSC Construction handles new homes<\/a>, extensions and major renovations<\/a> and commercial projects<\/a> across Quebec. Tell us about your project: request your free quote<\/strong><\/a>.<\/p>\n\n\n\n

Further reading<\/h3>\n\n\n\n