Direct answer

The answer depends on the realistic completion range and the available long-term lock programs. Compare the cost of locking early with the risk of remaining exposed, and confirm the lock period, expiration date, extension policy, float-down rules, and what happens if construction is delayed.

A responsible plan uses the builder's timeline as an estimate, not a guarantee. The financing team should track milestones and revisit the strategy before a short closing window forces the decision.

What does this mean for a Northeast Florida buyer?

In Northeast Florida, the answer should be tested against the builder's actual contract, community, expected completion range, taxes, insurance, HOA or CDD obligations, and the buyer's current approval. Jacksonville, St. Johns, Clay, Nassau, and Flagler County transactions do not share one universal cost or timeline.

Primary sources

Where can you verify the framework?

  1. Explore mortgage interest ratesConsumer Financial Protection Bureau · Accessed August 13, 2026
  2. Compare and negotiate your loan offersConsumer Financial Protection Bureau · Accessed August 13, 2026