Tankless installs in Grandview Heights often go in cleanly thanks to modern gas infrastructure, but simultaneous demand from a suite still needs careful sizing.
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Quick answer
A tankless gas water heater installed in Grandview Heights typically costs $3,500 to $7,500, a ballpark from 2026 public market data, not a quote — CANRO's certified gas technicians confirm the actual price after checking gas line capacity and your household's peak hot water demand. Homes with a suite drawing hot water simultaneously with the main house tend to land toward the higher end.
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Tankless units need more instantaneous gas than a storage tank, and in older housing that often means upsizing the gas line — but many Grandview Heights homes were built with enough gas capacity headroom already, particularly larger newer builds designed with higher-demand appliances in mind. That said, it still needs to be checked rather than assumed, especially in homes running a suite on the same meter.
| Scope | Ballpark (CAD) |
|---|---|
| Tankless water heater installed | $3,500–$7,500 |
| City of Surrey permit | $75–$200 |
A single tankless unit has a maximum flow rate, and if the main house and a suite both draw hot water at the same time — two showers plus a load of laundry, say — a unit sized only for the main house can fall short. In these cases, either a larger tankless unit sized for combined peak demand, or two separate units, is worth discussing before committing to a single undersized system.
Homeowners choosing between a single larger tankless unit and two smaller dedicated units should also factor in what happens during a repair: with one shared unit, both households lose hot water at once if it needs service, while two separate units mean only one household is affected at a time — a practical trade-off worth discussing alongside the straightforward cost comparison.
A homeowner wants tankless for the main house and is deciding whether the same unit can also cover a coach house at the back of the property. Depending on the combined peak flow rate needed if both structures draw hot water simultaneously, this sometimes calls for a single larger unit and sometimes for two separate tankless units, one per structure, to avoid either household running short during overlapping usage.
Because the gas line in a newer build often has some spare capacity already, the bigger question here tends to be flow-rate sizing rather than whether the line itself can support a tankless unit at all.
Homeowners comparing one larger unit against two separate tankless units often ask about long-term maintenance too — two units mean two annual descaling visits instead of one, which is a real ongoing cost difference worth factoring in alongside the higher upfront installation cost of running two systems instead of a single properly sized one.
It's worth asking your installer about recirculation options too, particularly in a larger home where the tankless unit sits far from a primary bathroom — a recirculation loop can shorten the wait for hot water to arrive at a distant fixture, though it does add to the installation scope and should be discussed as part of the original quote rather than added on afterward.
Safety note
If you ever smell gas near a boiler or water heater, get everyone out of the house first, then call FortisBC at 1-800-663-9911 from outside. Don't attempt to locate or fix a suspected leak yourself.
Sometimes, depending on combined peak demand — a technician models this before recommending one unit versus two.
Often, but it should still be verified rather than assumed, particularly if a suite shares the same meter.
Yes, the City of Surrey requires a gas permit and inspection.
Often less than a day in a newer home with adequate gas capacity; longer if upsizing or two units are needed.
It can be, provided sizing accounts for both households' peak usage rather than just the main house.
It can reduce standby losses, though actual savings depend on your household's usage patterns.
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