Welcome Tax Calculator Saint-Lambert 2026

A quirk worth knowing before you close on a property in Saint-Lambert: the city does not run its own assessment department. The Longueuil Property Assessment Department prepares the roll for Saint-Lambert, Boucherville, Brossard, Longueuil and Saint-Bruno-de-Montarville, and that assessed value sits at the centre of how the welcome tax is calculated, regardless of the price you negotiated.

A snapshot of the local market

Saint-Lambert ranks among the South Shore's most sought-after addresses, with a mix of older homes near the village core, family residences in Préville and a growing pool of condos in the Tiffin–Riverside corridor. Neighbourhood-level statistics are published on the Centris Saint-Lambert community profile, and APCIQ's Residential Barometer flagged a slight downward pressure on median single-family prices province-wide in the first quarter of this year. The condo segment continues to draw buyers who want quick access to the Longueuil metro and downtown Montréal.

What drives the amount in Saint-Lambert

Three things shape your bill. First, the taxable basis: the city always uses the highest of the sale price, the consideration stipulated in the notarial deed and the market value. Market value is the figure on the assessment roll multiplied by an annual comparative factor — a detail that catches buyers off guard when the assessment is older and the factor pushes the basis upward. You can check the value on file at any address through the Longueuil assessment roll.

Second, the bracket structure: Saint-Lambert applies its top municipal bracket without an intermediate step, so the curve jumps sharply once the trigger threshold is crossed. The slope is steeper than Longueuil, where the upper bracket kicks in later, and it tracks closely with neighbouring Brossard. When you're weighing two South Shore listings at similar asking prices, this is exactly the kind of detail the calculator above is built to surface.

Third, exemptions. Transfers between spouses, parent and child, or following a death within the direct family are taxable in principle but exempt by statute — provided the notary records the exemption in the deed. The Act respecting duties on transfers of immovables lists each recognized situation, and Saint-Lambert reserves the right to ask for supporting documents.

Payment, timing and the federal credit

Saint-Lambert bills the welcome tax as a single instalment, payable within 30 days of the invoice date. There is no schedule of partial payments — something to budget for alongside the notary's fee and the property-tax adjustment at closing. You can review the account and pay online through the ImmoNet Saint-Lambert portal or the Citizen Space. If a transfer is not registered in the land register — a typical corporate-reorganization case — the disclosure form must reach the city within 90 days, otherwise Revenu Québec is empowered to charge a supplementary duty.

First-time buyers should also keep the federal Home Buyers' Plan (HBP) and the federal Home Buyers' Tax Credit on their radar. Neither reduces the municipal welcome tax, but they free up cash at the moment the city sends the bill.

Useful contacts and resources

• INFO-TAXES line, Saint-Lambert: 450 672-4444 — email: finances@saint-lambert.ca
• Property assessment (Longueuil): 450 463-7177 — for questions about the value on the roll
• Saint-Lambert official transfer-duties page
• Citizen Space and ImmoNet portal for online account access
• Longueuil assessment roll to look up the assessed value at a specific address
• Property assessment — Québec.ca for an overview of how assessments work province-wide

The calculator above produces an estimate based on the active brackets and the taxable basis you enter. The official notice issued by the City of Saint-Lambert remains the authoritative document for payment.