Yes, but assess the design, cost, programme and consent implications before the affected work proceeds. Record the agreed change, update the relevant documents and obtain any required council approval rather than relying on a verbal instruction.
Understand why the change is needed
Changes can arise from unexpected existing conditions, product availability or a revised client preference. First establish the problem and compare possible responses. A seemingly small substitution may affect structure, weatherproofing, thermal performance or other coordinated details. Involve the relevant designer or specialist rather than asking the builder to resolve every issue independently.
Assess changes to your home investment
Consider whether the change supports the home and lifestyle you are investing in. Request a clear description of the changed scope and its cost and programme effects. Include any design or specialist fees, procurement consequences and work that needs to be redone. Follow the approval process in the building contract. Keep discretionary upgrades separate from work required to resolve an unforeseen condition.
Confirm the consent pathway
Changes to consented work may be handled as a minor variation or require a formal amendment, depending on their significance. The council determines the appropriate process. Obtain the necessary advice and approval before the affected work is carried out. A change can also affect resource consent or other approvals, so assess more than the building drawings alone.
Maintain one coordinated record
Issue clearly identified revisions and ensure the site team uses the correct documents. Update specifications and specialist information where relevant, and retain approvals for completion records. Modal can help resolve design changes and coordinate documentation within an agreed construction-support appointment. Our process explains how that involvement connects to earlier design decisions.
Related questions
- How do I choose the right builder for my project?
- What happens after building consent is approved?
- Does my architectural designer stay involved during construction?
Further guidance
Regulatory guidance checked September 2026. Confirm the current requirements for your project.
