Seller's Guide

Renovations and Your Home's Value

By Georges Matar · July 20, 2026 · 7 min read

Should you renovate before listing? The answer depends far less on taste than on two things: the price ceiling in your sector, and the rules that govern construction work in Quebec. Here are both, along with what you will have to declare once the work is done.

Price is set by comparison, and comparison has a ceiling

A property does not sell for the sum of what it cost. It is compared to what sold recently nearby, for a similar building type, a similar living area and a similar year of construction. Those comparables set the range buyers reason within, and they impose a ceiling.

A property over improved relative to its street runs into that ceiling. The buyer sees the quality, but compares it to houses in the same sector selling for less, and calculates the gap. Financing pushes the same way: a lender who orders an appraisal will have it rest on comparables, not on your invoices.

The renovation that holds up best is therefore the one that brings the property up to the level of its sector, not the one that pushes it above. In its seller’s guide, the OACIQ states that preparation work cannot guarantee a sale price that offsets its cost.

The work that removes an objection

Before a sale, useful work is not the work that adds luxury. It is the work that removes a reason to hesitate or to deduct.

Deep cleaning and decluttering. Time more than money, to act on the perceived volume of the rooms, the circulation, and the storage capacity that buyers judge by opening doors.

Neutral paint and lighting. Missing bulbs, mismatched colour temperatures, dead fixtures: a badly lit room reads as a smaller and less maintained room.

Visible minor repairs. A door that sticks, split caulking, a dripping tap. None of them is serious, and that is exactly why they weigh: the buyer adds them up and draws a conclusion about what cannot be seen.

What the inspector will flag. Fixing it in advance avoids a renegotiation costlier than the repair: the pre-purchase inspection checklist says what will be looked at. Repairing never exempts you from declaring, and preparing a property details that limit.

The work that rarely pays for itself before a sale

A high end kitchen, an in-ground pool, a finished basement of high specification, adding a garage: these are the projects that push a property above its street fastest.

They have another thing in common: they are the ones that trigger the permit, the plans and often a professional’s seal. For an interior renovation touching the layout or the structure, Laval requires an architectural plan signed and sealed by an architect under section 16 of the Architects Act, a structural plan sealed by an engineer, and announces a 30-day processing time. A heavy project started in order to sell in spring often finishes after spring.

What you will have to declare, finished work or not

The Declarations by the Seller of the Immovable form (DV 00001, version 06/2022) asks directly. Section D14.4: has significant work been carried out on the immovable, for example a change to the division of the rooms or a change of floor covering? If yes, you must describe it, then state whether plans and specifications were prepared, and whether the required permits were issued for each of those jobs.

Section D2.11 covers the exterior: addition, replacement or modification of windows, a pool, a shed, a paved driveway, fences, a porch, a deck, hedges or retaining walls. A positive answer can require a new certificate of location, roughly $1,630 plus taxes under the 2026 suggested tariff of the Ordre des arpenteurs géomètres du Québec. Section D2.12 covers notices of non-compliance received from an insurer or the municipality, and section D15 is for details: where, what year, how the situation was settled, and whether the problem is resolved.

The municipal permit: what requires one

In Montreal, a permit is required for work that touches the walls or the foundations of a dwelling, and for work that modifies the dimensions, division or use of rooms. No permit is required for minor cosmetic work: floor covering, paint, cabinets, counters, a sink or a bath. Borough by-laws apply on top.

Laval publishes a table by type of work. No permit: painting, renovating an existing bathroom, renovating a kitchen. Permit required: adding a bathroom, a bedroom or a dwelling, modifying an interior staircase, adding a fireplace. For an interior renovation, the permit becomes required as soon as the dimensions of the rooms, the number of rooms or the structure change. Cost: $92 for the first $20,000, plus $2.50 per $1,000 bracket.

Laval requires no municipal permit to replace an electrical panel, modify wiring or redo the plumbing. That does not mean you may do them yourself: this work stays regulated at the provincial level.

The contractor, the RBQ licence, electricity and gas

The Régie du bâtiment is clear: a person who carries out or has construction work carried out for another person, for profit, is a contractor and must hold a licence. And “for profit” goes beyond the accounting sense: salvaged materials or reduced rent are enough.

The owner-builder exemption is narrow: renovation, repair or maintenance of your own building, for less than $20,000, per separate building, with no splitting of the project. Moving a wall is not included. And it never applies to an electrical installation, an installation intended to distribute gas, or petroleum equipment. Electricity requires the licence bearing sub-category 16, which the Corporation des maîtres électriciens du Québec qualifies as the government’s mandatary. These are regulated trades, not weekend projects.

What matters to you is the licence security: $20,000 for a specialized contractor, $40,000 for a general contractor. It compensates the client for deposits paid, unfinished work, poor workmanship and defects discovered within the year following the end of the work. An unlicensed worker offers you none of it. Check every licence in the licence holders’ registry on rbq.gouv.qc.ca, which also shows claims and amounts paid over the past five years.

The warranties that follow the work

Article 2118 of the Civil Code holds the contractor, the architect, the engineer, the professional technologist who directed or supervised the work, and the subcontractor, solidarily liable for the loss of the work occurring within five years after the work was completed. Article 2120 holds them jointly, for one year, to warrant the work against poor workmanship existing at the time of acceptance or discovered within one year after.

On the seller’s side, article 1726 imposes the warranty against latent defects, and article 1728 adds that a seller who knew of the defect or could not have been unaware of it must repair the injury in addition to returning the price. A written contract, invoices, permits and reports kept and handed over: without a file, nothing to prove and nothing to pass on.

Two tax rules if you renovated heavily

The 365-day rule. A gain from a housing unit located in Canada that you held for less than 365 consecutive days before its disposition is deemed business income, not a capital gain. The profit is fully taxed, the principal residence exemption does not apply, and a loss is deemed nil. The exceptions are life events: death, serious illness, insolvency. The rule applies to residential properties sold on or after 1 January 2023.

GST on a major renovation. The resale of a previously occupied residential complex is normally exempt, but a substantially renovated complex is treated like new housing, and the sale becomes taxable. The test is the 90% test: generally 90% or more of the interior of the existing building must have been removed or replaced, with only livable areas counting.

I am a broker, not a tax specialist: have your situation confirmed by an accountant. The full math is in house flipping in Montreal.

The six to eight weeks before listing

Order matters as much as the list. Gather the documents: invoices, permits, warranties, plans, reports. Complete the seller’s declarations with your broker. Fix deferred maintenance. Declutter and clean. Paint neutral where needed. Photograph. Then list. The detail is in how to prepare your home for sale, and the budget in the real cost of selling.

Torn between renovating and listing as is? Let’s walk through your property together: we look at the comparables on your street before deciding what to touch.