Heat pumps in Longueuil: permits and bylaws
Planning a heat pump or an air conditioner in Longueuil? Here is what the bylaws say: the permit, the distance from the lot lines, where the unit can go and the noise limit. It all comes from the official texts.
Five spots, one answer for each.
Each answer is the bylaw rule, in short. “Not specified” means the text does not say: ask urban planning.
1 m from a lot line.
1 m from a lot line. A ground unit must be hidden from the street (or an adjacent park) by a structure or landscaping.
1 m; 2 m high at most; hidden from the street or a park by a structure or landscaping.
Behind the railing: building of 4 storeys or fewer with at least 4 dwellings, 1 unit per dwelling.
Flat roof: hidden from the street or a park.
Good to know, and who to call.
Good to know
- Corner lot: allowed in the yard facing the street, 1 m from the lot line, hidden from the street and 2 m high at most.
- Lot next to a park: a ground unit must also be hidden from the park.
- Same rules in all three boroughs (Vieux-Longueuil, Saint-Hubert, Greenfield Park).
The short answers.
Do you need a permit to install a heat pump in Longueuil?
No permit (regular residential lot).
How far from the lot lines must the unit be?
1 m from a lot line.
Can a heat pump go in the front yard?
Yes, with conditions. 1 m; 2 m high at most; hidden from the street or a park by a structure or landscaping.
What is the noise limit?
53 dB(A) maximum, at the lot lines.
Who should I call to confirm before the work?
Urban planning department (Direction de l’aménagement et de l’urbanisme), 311 or 450 463-7311, dau.informations@longueuil.quebec.
Read at the source.
Sources: Simplified “Thermopompe” sheet (July 2025); bylaw VL-2025-839, s. 224 (row 19), 263 and 264 (same rules in SH-2025-551 and GP-2025-170); nuisance bylaw CO-2011-700, s. 4.15.1 (July 2025 sheet).
Checked by AirGreen on September 30, 2026.
This page is a summary. The official bylaw prevails. Confirm with the city before the work.
A heat pump project in Longueuil?
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