Industry: Real Estate
HST on New Construction and Renovations: What Property Owners Need to Know
The HST implications of building, substantially renovating, or flipping real estate in Ontario, including the New Housing Rebate.
HST is the most expensive blind spot in Ontario real estate. A flipper who didn’t realize they had to register can lose their entire profit margin in a single CRA assessment. A self-builder who didn’t claim the rebate on time can leave $30,000+ unclaimed. In the current market, understanding the 13% tax drag is the difference between a successful project and a financial disaster.
The two categories that decide everything
| Property type | HST on sale? | Rebate available? |
|---|---|---|
| Previously-occupied, used residential | Exempt | N/A |
| Newly constructed home | 13% applies | NHR (Owner) or NRRPR (Renter) |
| Substantially renovated home | 13% applies | Same as new |
| Commercial property | 13% applies | Buyer typically self-assesses and claims ITC |
What is "substantially renovated"?
This is the line that separates a "renovation" from a "new home" in the CRA’s eyes. The "why" is simple: the CRA wants to tax the value added by a major overhaul as if it were a new product.
If you gut a bungalow to the studs, replace mechanicals, redo every room, and sell - that’s substantial renovation. HST applies on the sale price.
The New Housing Rebate (NHR) vs. NRRPR
| Factor | New Housing Rebate (NHR) | Rental Property Rebate (NRRPR) |
|---|---|---|
| Intended Occupant | Owner or close relative | Long-term tenant (1-year lease) |
| Federal Rebate | 36% of GST (phases out $350k-$450k) | Same |
| Ontario Rebate | 75% of Provincial HST (Capped at $24k) | Same |
| Ontario Price Cap | None | None |
| Federal Price Cap | $450,000 (Hard cut-off) | $450,000 (Hard cut-off) |
Worked Example: The $1,000,000 New Build
Scenario A: Investor sells as a "Flip"
- Sale Price: $1,000,000 (plus HST)
- HST Collected: $130,000
- ITCs (HST paid on costs): ($65,000)
- Net HST to Remit: $65,000
- *Note:* No rebate available to the flipper.
Scenario B: Investor rents it out (NRRPR)
- HST Self-Assessment on FMV: $130,000
- Ontario Rebate: ($24,000)
- Federal Rebate: $0 (Price > $450k)
- ITCs (HST paid on costs): ($65,000)
- Net HST Out-of-Pocket: $41,000
- *Note:* Requires 1-year lease and tenant occupancy.
The flipper trap and the 365-day rule
If you buy, substantially renovate, and sell:
- 01You must register for HST before the sale closes.
- 02You must charge 13% HST on the sale price.
- 03You can claim ITCs for HST paid on construction materials and subcontractors.
- 04The NHR is not available to you because the property isn’t your primary residence.
Self-builders building their own home
If you build a home for yourself (acting as the general contractor), you can claim the GST/HST New Housing Rebate for Owner-Built Houses (Form GST191).
| Eligible costs | Examples |
|---|---|
| Construction materials | Lumber, drywall, fixtures, finishes |
| Subcontractor labour | Plumbing, electrical, framing |
| Professional fees | Architect, engineer, surveyor |
| Permits | Building permits, inspections |
Track every HST-bearing invoice from day one. The rebate must be filed within two years of substantial completion or first occupancy.
The HST decisions on a development or major renovation should be modelled before the first shovel goes in the ground. We’ve seen owners lose $40K+ in rebates simply because they didn’t structure ownership and intent correctly upfront.
The content above is for general informational and educational purposes only and does not constitute professional accounting, tax, legal, or financial advice. Tax rules change and outcomes depend on your specific situation - please consult us before acting on anything you read here.
Next Step
Start with a 30-minute diagnostic call.
Bring your last two years of T2, HST returns, and personal T1. We’ll review them in advance and use the call to flag the positions that won’t hold, the SBD grind you may be triggering, and the elections you may have missed - before you commit to anything.