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Buying a pre-construction condo in London

Updated October 30, 2026 ยท 9 min read

Key takeaways

  • New condos from a developer come with a 10-day cooling-off period. Use it to have a lawyer review the agreement.
  • Expect a deposit schedule spread over months, and an "interim occupancy" period before you officially own the unit.
  • Condo deposits must be held in trust, and Tarion provides limited protection (up to $20,000 per Tarion) if a builder fails to return a deposit.
  • Closing costs on new condos can include items resale buyers never see. Ask for them in writing.

London has seen steady condo construction in recent years, from downtown towers to mid-rise buildings in the north and southwest. Buying from a developer, before or during construction, is a very different process from buying a resale unit. It's not riskier or safer by default, but the risks are different.

The 10-day cooling-off period

Under Ontario's Condominium Act, 1998, a buyer of a new condo unit from a developer can rescind the agreement within 10 days of receiving the signed agreement and the developer's disclosure statement (whichever comes later), and get their deposit back. This is your window to:

Developers' agreements are long and written to protect the developer. Clauses on price adjustments, closing costs, occupancy delays and assignment rights are where most surprises live.

Deposits and how they're protected

Pre-construction condos usually require deposits in stages, for example a set amount at signing, then further payments over the following months. In Ontario:

Check the current limits and rules on Tarion's deposit protection page, and ask the developer and your lawyer exactly how your deposits are protected.

Interim occupancy: the step that surprises people

With a new condo, you often move in before you legally own the unit. That's because the whole building has to be registered as a condominium before individual units can be transferred. Between moving in and final closing, you're in "interim occupancy", and you pay an occupancy fee to the developer. It's generally made up of:

Occupancy fees don't build equity. Interim occupancy can last a few months or longer, depending on how quickly the building is registered. Budget for it.

Delays

Construction delays are common. Your agreement and Tarion's Addendum set out how the developer can extend occupancy dates, how much notice they must give, and when you may be entitled to delay compensation. Your lawyer can explain the specifics.

Closing costs on new condos

On top of land transfer tax and legal fees, new-condo closings can include:

Ask for a schedule of closing adjustments before you sign, and have your lawyer check whether any are capped. Uncapped development charges have cost some Ontario buyers thousands at closing.

Tarion warranty on new condos

New condo units and common elements come with statutory warranty coverage administered by Tarion, while builders are licensed separately by the Home Construction Regulatory Authority (HCRA). You can check a builder's licence in the HCRA's Ontario Builder Directory. The warranty includes coverage on workmanship and materials, plumbing, electrical and building envelope items, and major structural defects, each for different periods. You'll do a pre-delivery inspection (PDI) with the builder before moving in. Document every issue carefully, and keep track of the deadlines for submitting warranty forms. See Tarion's website for current coverage details.

Assignments

An assignment means selling your purchase contract to someone else before closing. Many developers restrict or charge for assignments, and there can be tax implications. If you might need flexibility, read the assignment clause carefully.

New vs resale: which is right for you?