If you're considering a newly built home in Kingston or the surrounding area, the process looks quite different from buying resale. New construction comes with its own contracts, its own warranty system, its own rebate programs — and its own rules around when (and whether) you can change your mind. Here's what you need to know before you sign.
Hire Your Agent Before You Visit the Showroom
This is one of the most overlooked — and most costly — mistakes new-build buyers make. The order of operations matters.
In most cases, the builder pays the buyer's agent commission, not you, so having your own representation typically costs you nothing extra. But here's the catch: many builders will only honour that commission if your agent registers you before you visit the sales centre or sign in at the showroom. If you walk in on your own, browse, and register your name and contact information first, some builders will treat you as their lead and refuse to pay a commission to an agent you bring in afterward.
The fix is simple: line up a buyer's agent first, and let them register you with the builder before your first visit. That way, you get independent advice on pricing, lot selection, and contract terms throughout the process — and in most cases, it doesn't cost you a thing, because the builder is covering the fee regardless.
Start With the Contract, Not the Showroom
The biggest mistake new-build buyers make is treating the builder's sales office like a resale showing. The Agreement of Purchase and Sale (APS) you'll be asked to sign is written by the builder's lawyer, and it's considerably more one-sided than the standard Ontario Real Estate Association agreement used in resale transactions. Before you sign anything, pay close attention to:
- Closing date flexibility. Builders often reserve the right to push back occupancy and final closing dates.
- Development levies and adjustments. Many of the costs that surprise buyers at closing — development charges, utility hookups, Tarion fees — are buried in the fine print, not the listed price.
- HST treatment. Make sure the contract is clear on how any rebate is being handled (more on this below).
- Upgrade pricing schedules. "Schedule A/B" pricing for finishes and options can add up fast.
Have your own real estate lawyer review the APS before you sign — not after. This matters even more on new construction than resale, for reasons we'll get into shortly.
Can You Negotiate With a Builder?
Often, yes — more than buyers expect, especially in a balanced or softer market. The most common areas of flexibility are:
- Price, particularly on unsold inventory homes or units later in a phase release
- Free upgrades (appliances, flooring, finished basements) — often easier for a builder to concede than a price cut, since it doesn't appear as a discounted comparable sale on record
- Closing date flexibility and deposit structure
- Lot premiums on less desirable lots
Your leverage is strongest when a builder has completed, unsold inventory sitting on the books, or when a phase has been slow to sell. It's weakest during a hot pre-construction launch with multiple buyers competing for the same unit.
The Tarion Warranty: What It Covers
Every new home built by a licensed Ontario builder is automatically enrolled in the Tarion New Home Warranty — there's no extra cost to you, as it's built into the builder's enrolment fee. Coverage breaks down into tiers:
- Year 1: Defects in work and materials, and that the home is fit for habitation
- Years 1–2: Water penetration, electrical, plumbing, HVAC, and Ontario Building Code violations
- Years 1–7: Major structural defects
- Deposit protection: Up to $100,000 if the builder becomes insolvent before closing
- Delayed closing compensation: If the builder misses agreed-upon dates
The catch is timing. You need to register any defects through Tarion's portal within specific reporting windows (30-day, year-end, and second-year forms). Miss the window, and you may lose your right to claim on that issue — so mark your calendar the day you take possession.
Is There a Cooling-Off Period?
This is one of the most misunderstood parts of buying new in Ontario, because the answer depends on what you're buying.
Pre-construction condominiums: Yes. Under the Ontario Condominium Act, buyers have a statutory 10-day rescission period from the date they receive a fully signed agreement (or the required disclosure documents, whichever is later). You can cancel for any reason during that window, no penalty, full deposit refunded — and the builder cannot remove this right from the contract.
Freehold new builds — detached, semi-detached, townhomes: No. There is no provincial cooling-off period for freehold construction. Once you sign, you're bound by the agreement unless the builder has voluntarily included a rescission clause (some do during competitive launches, but it's optional), or you've negotiated a financing or lawyer-review condition into the offer itself.
The practical takeaway: with a freehold new build, review before you sign — there's no built-in second chance once your signature is on the page.
Current Buyer Incentives: The HST Relief Window
As of 2026, there's a significant — and time-limited — opportunity for new home buyers in Ontario tied to HST relief on new construction:
- Federal First-Time Home Buyers' GST/HST Rebate: Eliminates up to 100% of the federal GST/HST portion (up to $50,000) on new homes priced up to $1 million for first-time buyers, phasing out between $1M and $1.5M. Applies to agreements signed on or after March 20, 2025.
- Ontario's temporary expanded HST rebate: Rebates up to $80,000 of the provincial portion on homes up to $1 million, available to all buyers — not just first-time buyers — for agreements signed between April 1, 2026 and March 31, 2027.
- Combined potential relief: Up to $130,000 for an eligible first-time buyer on a $1 million new home.
A few important notes:
- This applies to new construction only — resale homes aren't subject to HST, so there's no rebate to claim.
- The federal portion has Royal Assent and is currently claimable; the Ontario provincial portion is still moving through the legislative process as of this writing, so confirm exactly how a specific builder is structuring the rebate in your contract.
- Because the Ontario portion of this program is explicitly temporary, expect strong buyer activity through the window — and the possibility of a demand pullback once it closes.
Given how quickly the details here are evolving, I'd treat this as a starting point for a conversation rather than the final word — your lawyer or accountant should confirm the specifics before you rely on any number.
The Bottom Line
Buying new construction in Kingston can be a great option, but it rewards buyers who do their homework upfront: read the contract before you sign, bring your own representation, understand exactly what your Tarion warranty does and doesn't cover, and know whether (or whether not) you have a cooling-off period before you commit.
If you're weighing a new build against resale in the Kingston area — or want a second set of eyes on a builder's contract — I'm happy to help you think it through.