Changes are common in construction. Some come from concealed conditions, some from design development, some from code or utility requirements, and some from owner requests. The goal is not to pretend changes will never happen. It is to make each change visible before work, money, and schedule move.
HHM builds the change-control process around the signed agreement, applicable requirements, permit conditions, emergency authority, and clearly identified decision-makers.
Define the original baseline
Cost control begins with drawings, specifications, selections, allowances, exclusions, and responsibilities that are clear enough to compare against later. A change cannot be measured reliably if the original agreement says only “remodel kitchen” or “builder-grade finishes.”
Use one written change path
Every proposed change should identify:
- The reason for the change
- Added, removed, or revised work
- Materials, quantities, allowances, and assumptions
- Price increase or credit, including tax and contractor treatment
- Schedule and decision-deadline effect
- Permit, inspection, design, warranty, or trade effects
- Who requested, prepared, reviewed, and approved it
Verbal conversations can address an immediate problem, but the decision should be documented before affected work proceeds, except for reasonably necessary protective action permitted by the agreement and applicable law.
Separate discovery from authorization
When a concealed condition appears, first document what was found and make the area safe. Investigation may be needed before anyone can price the solution. A discovery notice is not automatically approval for unlimited corrective work.
If exploratory work is authorized on time and materials, the agreement or written authorization can define a limit or not-to-exceed amount, labor/equipment rates, documentation, and the point at which the team must stop and request further approval. The controlling agreement and applicable law determine whether and how those terms apply.
Except for action reasonably necessary and authorized to protect people or property, affected work should not proceed until the required contractual approval is documented. For urgent protective action, record the condition, immediate response, authority, cost basis, and follow-up approval as soon as practicable. Urgent authority does not approve unrelated corrective scope.
Track pending changes
Maintain a log with proposed, approved, rejected, completed, and billed status. Include the original contract, approved changes, allowances used, contingency remaining, payments, and current forecast. Review it at regular project meetings rather than waiting for the next invoice. A tracking log does not replace a signed change order when the agreement requires one.
Evaluate the ripple effect
A different appliance can change cabinets, electrical loads, ventilation, plumbing, counters, delivery, and schedule. A window revision can affect structure, exterior finish, insulation, waterproofing, interior trim, and permits. Ask which drawings, trades, orders, and inspections are affected before approving the visible item.
Use decision deadlines
Some changes are inexpensive on paper and costly after work or ordering begins. The team should identify dates after which a selection creates restocking, rework, expediting, storage, or delay. “No price change” does not necessarily mean “no schedule change.”
Protect against unauthorized scope drift
Unless the agreement establishes another process, owner requests should be routed through the authorized project contact rather than directed independently to subcontractors. This protects everyone from conflicting instructions and missing price/schedule effects.
Close each change
Confirm that the change is reflected in drawings, selections, schedule, inspections, invoices, warranties, and closeout documents. Credits deserve the same documentation as additions, but deleted work may still involve committed labor, design, restocking, cancellation, or schedule effects rather than a full original-price credit.
HHM control standard: Authorization, documentation, emergency action, credits, and contract changes are tied to the signed agreement, current project record, and applicable requirements.