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Services / Modifications & Conditions
Approved plans rarely survive a project unchanged. When a development consent no longer matches what you intend to build — or a condition is proving difficult to work with — NSW planning law provides modification pathways under section 4.55. Greiss Planning helps you choose the right pathway and prepare the application properly.
Get a fixed-fee quoteLast updated: 1 August 2026 · Written by Dr George Greiss
A development consent records what a consent authority approved at a point in time. Projects rarely stand still: designs are refined during construction documentation, site circumstances shift, and built work sometimes departs from the approved plans. When that happens, the consent needs to be brought back into line with the project before the difference becomes a compliance problem.
NSW planning law recognises this through the modification provisions of the Environmental Planning and Assessment Act 1979. A well-prepared modification application can adjust approved plans, amend or delete conditions, and regularise differences between approved and constructed work. The starting point is always a careful read of the existing consent and its conditions.
Greiss Planning is led by Dr George Greiss, who holds a PhD in urban planning and spent sixteen years inside local government personally assessing applications — including modification applications — before founding the practice. That experience shapes measured, practical advice: what a consent authority will look for, where an application is likely to meet resistance, and how to present changes clearly. No consultant can guarantee an outcome; careful preparation and an honest reading of the pathway give an application its best footing.
Section 4.55 of the Environmental Planning and Assessment Act 1979 allows a development consent to be modified after it has been granted. Rather than lodging a new development application, you apply to the consent authority to change the approved plans, description or conditions. The consent authority must be satisfied the development remains substantially the same as originally approved.
Often, yes — but it depends on the change. A modification can only be approved where the development remains substantially the same as the one originally approved. Minor design adjustments usually qualify; a fundamentally different proposal will not. We review the consent and the proposed changes and advise whether a modification is realistic or a new application is the sounder pathway.
Section 4.55(1) covers corrections of minor errors, misdescriptions or miscalculations. Section 4.55(1A) covers changes with minimal environmental impact, assessed through a simpler process. Section 4.55(2) covers other modifications and involves fuller assessment, sometimes with renotification. The clause you apply under affects the information required, the scope of assessment and often the timeframe, so it pays to choose carefully.
Start by understanding what the condition actually requires — conditions are sometimes more workable than they first appear. Where a condition genuinely creates practical difficulty, it may be possible to seek its amendment or deletion through a modification application, supported by clear reasons and evidence. We review the condition, explain its intent and advise on the realistic options.
Professional fees depend on the complexity of the consent, the nature of the changes and the pathway involved. Rather than quoting a standard rate, Greiss Planning provides a fixed-fee quote after an initial discussion of your consent and proposed changes, so you know the full cost before committing. Council application fees are additional and set by regulation.
Timeframes vary with the council, the pathway and the complexity of the change. Straightforward s4.55(1A) modifications are often determined more quickly than a new development application, while s4.55(2) modifications requiring renotification take longer. A well-prepared application with clear justification generally moves faster, though no consultant can control a consent authority's timeframe.
Tell us about your consent and the change you have in mind — we will advise on the pathway and provide a fixed-fee quote.
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