Build a risk register

Start with specific unknowns: concealed wall conditions, an unverified drain connection, irregular slab levels, or equipment access that needs review. Give each item a possible consequence and a next action. Avoid broad labels such as “old house problems” that cannot be investigated. The point is to shorten the unknowns list before construction, then retain a clear record of whatever cannot yet be resolved.

Separate uncertainty from preference

A new cabinet style is a choice; unexpected work behind an existing wall is a different kind of decision. Track them in separate columns. If you decide to use reserve money for an upgrade, show the remaining reserve afterward. This keeps the household from believing the same dollars are available twice. It also helps you pause optional selections when unresolved work deserves priority.

Set approval triggers

Agree who may authorize a change and what information is needed. A useful request describes the condition, the proposed response, the price effect, any schedule effect, and the decision deadline. If the condition needs a specialist, identify who arranges that assessment. An urgent phone call may begin the discussion, but retain a written record before relying on a changed scope or total.

Choose a reserve from actual uncertainty

Ask the contractor which existing conditions are already priced and which remain assumptions. Discuss the likely range of work only where the contractor has enough evidence to estimate it. A project with open walls and confirmed systems may have different uncertainty from one involving concealed finishes. Use that discussion to decide the reserve; do not borrow a percentage from a different project and treat it as protection.

Review the remaining exposure

At each major decision, update both money spent and uncertainty remaining. Resolving an item without extra work can reduce exposure; finding another condition can increase it. Save the reason for each adjustment. Near the end, distinguish incomplete contracted work from newly desired extras. A contingency record is most useful when it shows why the total changed, rather than merely reporting that the reserve disappeared.

Your next steps

  • Name each unresolved condition.
  • Separate optional upgrades from risk spending.
  • Choose one authorized decision contact.
  • Record cost and schedule effects together.
  • Update the remaining reserve after changes.

Questions worth asking.

What contingency percentage should I use?

Discuss the actual unresolved conditions with the contractor. This guide does not supply a universal percentage or imply that a reserve replaces investigation.

Should I tell the contractor my reserve?

You can discuss your overall spending limits and approval process. Keep clear records distinguishing the agreed contract amount, selected extras, and money you have not committed.

Homerix planning resources help you prepare questions. Confirm site conditions, requirements and construction decisions with the appropriate contractor or authority. Room images are generated design inspiration.