Short answer
Because you are transferring a contract before you own the property. The builder’s agreement may control consent, timing, documents, marketing, administration charges and the assignee’s approval. Advertising first and asking later can put the assignor in breach.
The client problem behind the question
The assignor has a closing problem and wants maximum exposure quickly. The Realtor posts the unit publicly, then learns the contract bans advertising or requires consent before marketing. Time is lost when every day matters.
A practical Ontario example
Illustration only: An assignor needs to exit a condo purchase within four months. The lawyer finds that the builder permits assignment but bars MLS advertising and requires the assignee to sign builder forms. The marketing plan must work inside those restrictions; it cannot be copied from a normal resale listing.
Questions Rajiv would ask before suggesting a route
- Has written consent to market or assign been obtained?
- What exact wording can be used in advertising?
- Must the assignee meet builder requirements or provide identification?
- Which fees are fixed and which can change?
- Does the builder restrict assignments while it still has unsold inventory?
Practical routes to compare
- Ask the lawyer for a one-page summary of the assignment procedure.
- Use a Realtor experienced with that project and its permitted marketing channels.
- Build builder fees, commissions, legal fees and taxes into the minimum acceptable result.
Keep the decisions separate
- Contract and liability: the builder agreement, assignment documents and written consent are for the real-estate lawyer to interpret.
- Marketing and price: a Realtor can assess comparable choices and work within builder restrictions.
- Mortgage: the lender decides acceptable value, income, credit, documents and funding structure. A regulator does not set that lender policy.
- Tax: an accountant or tax lawyer should confirm GST/HST, rebate and income-tax treatment from the actual facts.
Where A, alternative, MIC and private lending may fit
An A lender is normally the first route when income, credit, debt ratios, property and current value fit. Alternative lenders can take a broader view of income or property at a higher cost. A MIC is an institutional mortgage lender and may offer a six-to-twelve-month or longer term, interest-only or amortized payments, open or partially open features, and sometimes a maturity matched to the planned exit. A private lender may also bridge a closing. A short-term approval is useful only when the client can explain how it will be repaid through refinance, sale or other documented funds.
Verified fact and current limitation
There is no single builder assignment form or fee for Ontario projects. The executed purchase agreement and the builder’s written approval process determine the permitted route. A lawyer should interpret restrictions before a Realtor markets the contract.
Source checked 2026-09-03: read the primary source. Builder wording, lender policy, taxes, appraisal and market conditions must still be verified for the file.
Pressure-test the answer
The route can fail if consent is refused, marketing is restricted, the assignee cannot finance, the appraisal is low, payment timing is unclear, tax is larger than expected, documents expire or the assignor remains liable. Keep a closing fallback, calculate the worst cash requirement and involve the lawyer before a contractual deadline is missed.
Documents to gather now
- Original purchase agreement, disclosure statement, amendments and assignment clause
- Builder consent requirements, fee schedule and critical dates
- Deposit receipts, upgrade payments and 90-day source-of-funds history
- Proposed assignment agreement and payment schedule
- Current income, credit, liabilities and other-property details
- Comparable sales, appraisal and lawyer/accountant estimates when available
Related AskRajiv guidance
Continue with assignment clause pre construction agreement ontario, builder closing adjustments development charges review.
Get an assignment closing strategy
Use Rajiv’s direct mortgage strategy form. Include the builder deadline and the result you need: assign, close, rent, sell or arrange a short-term bridge.
Source and review
Reviewed by Rajiv Verma, Mortgage Broker on 2026-09-03. Educational information only; not legal, tax, appraisal, real-estate or mortgage approval advice.