Home air sealing cost in Ontario typically runs between $500 and $3,000 for a full residential job. A small home or targeted spot-sealing job starts around $400–$700. Larger homes with attic, basement, and wall sealing combined can reach $2,500–$3,500. After Ontario rebates through programs like Enbridge Gas or the Canada Greener Homes Grant, many homeowners pay 30–50% less out of pocket.
Most people searching for this want a straight number, not a 10-paragraph intro. So here it is: for a typical detached house in Ontario, expect to pay somewhere between $800 and $2,000 for a proper air sealing job. But that number moves around depending on a few things, size of the house, how leaky it is, where the leaks are, and whether you’re bundling it with insulation work.
This breakdown covers all of that. Real numbers. What actually affects the price? Where can you save money? And what the rebates look like right now.
What Actually Goes Into the Price?
Home air sealing cost in Ontario isn’t one flat number because no two houses are the same. A contractor figures out their price based on a few key things.
Size of the home. A bigger house means more ground to cover. More windows, more exterior walls, more potential leak points. A 1,000 sq ft bungalow and a 2,800 sq ft two-storey are completely different jobs.
How leaky the house is. Some houses have three or four problem areas. Others have 20. If a blower door test shows the house is losing a lot of air, the job takes longer and uses more material.
Where the leaks are. Attic sealing takes longer than sealing around door frames. Basement rim joists, around plumbing penetrations, behind pot lights — these are more labour-intensive than obvious gaps around windows.
Whether insulation is part of the job. A lot of contractors bundle air sealing with attic insulation because you’re already up there. Bundled jobs cost more total but less per task than booking each separately.
Cost Breakdown by Job Type
| Job Type | Low | High | Notes |
| Spot sealing (doors, windows, outlets) | $400 | $700 | Quick fix, 2–4 hour job |
| Attic air sealing | $600 | $1,200 | Common entry point, often paired with insulation |
| Basement rim joist sealing | $400 | $900 | Foam insulation + air barrier |
| Full-home air sealing (all zones) | $1,200 | $3,000 | A blower door test usually includes |
| Air sealing + attic insulation bundle | $1,800 | $4,500 | Most common combo job |
| Commercial or larger residential | $3,000 | $8,000+ | Varies by scope |
These are Ontario market rates as of 2026. Prices in the GTA trend slightly higher than in smaller cities like Sudbury or Kingston, mainly because of labour costs.
Does House Age Change the Cost?
Yes, and it matters more than most people realize. Homes built before 1990 in Ontario were not built to today’s airtightness standards. There was no requirement. Builders used what was available, and air sealing wasn’t a priority.
What does that mean for cost: older homes typically have more leak points. More penetrations. More settling cracks. More gaps around original window frames. A contractor walking into a 1970s bungalow in Hamilton is going to find more work than the same contractor walking into a 2010 build in Barrie.
That said, older homes also see bigger savings after sealing. If the house is leaking badly, fixing it has a bigger impact on the bill. The payback period is shorter.
Ontario Rebates: What’s Available Right Now?
This is where a lot of homeowners leave money on the table. Home air sealing cost in Ontario is significantly lower after rebates if you know where to look.
Enbridge Gas Home Efficiency Rebate
Enbridge Gas offers rebates for Ontario homeowners who complete energy-saving upgrades, including air sealing. As of 2026, the Home Efficiency Rebate Plus (HER+) program offers up to $5,000 back on qualifying upgrades. Air sealing alone qualifies for a rebate, you don’t have to bundle it with a furnace replacement to get something back. You need a pre- and post-retrofit energy evaluation, which your contractor can help arrange.
Canada Greener Homes Grant
The federal Canada Greener Homes Grant has gone through changes. As of 2026, check Natural Resources Canada’s site directly for current availability; the program has had funding pauses and restarts. When active, it offered up to $5,600 for eligible upgrades, including air sealing and insulation.
Hydro One and Local Utility Programs
Some Ontario utilities run their own retrofit programs. Hydro One’s Whole Home program has covered insulation and air sealing for eligible customers. Check with your specific utility, programs vary by region and change year to year.
Is It Worth It? What the Payback Looks Like
Short answer: yes, for most Ontario homes.
The average Ontario household spends around $2,200 per year on home heating, according to Natural Resources Canada. Homes with significant air leaks waste 15–25% of that heat through gaps. That’s $330–$550 going out the window every year.
A $1,200 air sealing job that saves $400 a year pays itself back in three years. Everything after that is savings. The work lasts 10–20 years with minimal maintenance.
Add rebates, and the payback gets even shorter. Some homeowners effectively pay $600–$800 out of pocket after rebates on a job that saves them $400 a year. That’s less than two years to break even.
What Does the Inspection Process Look Like?
Before quoting the home air sealing cost in Ontario, most reputable contractors want to see the house first. Here’s what happens.
A technician walks through and checks the obvious spots, doors, windows, attic hatch, and basement. They’ll often use a thermal camera on a cold day to see where heat is escaping. The real test is a blower door test: a large fan is temporarily installed in an exterior doorway, the house is depressurized, and the contractor uses a smoke pen or thermal camera to pinpoint every leak.
The blower door test costs $150–$300 on its own, but many contractors include it in the quote for the full job. It’s worth asking about upfront. After the test, you get a clear picture of how leaky your house is, measured in ACH (air changes per hour). A well-sealed Ontario home should be under 3.0 ACH. Many older homes test at 6.0 or higher.
Frequently Asked Questions
How long does an air sealing job take?
Most jobs take half a day to a full day. Bigger homes with multiple zones take longer. If they’re also adding attic insulation, budget for a full day.
Can I do air sealing myself?
Some spots — around door frames, window trim, visible gaps, yes. But attic bypasses, rim joists, and hidden penetrations need professional tools and materials. DIY gets you 20% of the way there.
Does air sealing affect indoor air quality?
It shouldn’t if done right. A contractor seals random gaps, not intentional ventilation. If your home has an HRV (heat recovery ventilator), it keeps running normally. If you don’t have one, the contractor may recommend it after a very tight seal.
What’s the difference between air sealing and insulation?
Insulation slows heat transfer through walls and ceilings. Air sealing stops air movement through gaps. Both reduce heat loss but in different ways. You want both — doing only one leaves part of the problem unsolved.
Will my home feel stuffy after?
Not if ventilation is handled. A sealed home that already has an HRV or proper ventilation system feels fresh but warm. If the house has no mechanical ventilation, that’s worth discussing with your contractor before sealing.
How do I know if I qualify for rebates?
Most Ontario homeowners with natural gas heat qualify for the Enbridge HER+ program. You need a pre-retrofit energy evaluation done by a registered energy advisor. Your contractor should know who to contact.
Does home air sealing cost in Ontario vary by city?
A bit. GTA prices run slightly higher than Ottawa or Hamilton. Rural areas sometimes cost more due to travel time. Generally, though, the range is consistent across the province.
Ready to Get a Real Quote?
If your house feels cold in certain spots, or your heating bill seems high for the size of the place, it’s worth getting an inspection. Jarrah Contracting Services offers free assessments for homeowners across Ontario — York Region, Ottawa, and surrounding areas. The team has been doing this for over 15 years and works with Ontario rebate programs so you don’t have to figure it out alone.
Call (905) 251-1141 (York Region / GTA) or (613) 608-8262 (Ottawa). Or visit jarrahcs.com to book.