A full renovation involves several trades working in a specific order, and quoting it without following that logical order is the most common reason cost overruns appear mid-job.
Demolition and structure phase
It all starts by demolishing what isn't kept (partitions, tiling, old installations) and, if the project requires, working on the structure (opening gaps, reinforcements). This phase must be quoted with a margin, because it's where hidden surprises tend to appear after demolishing.
Installations before closing up
Electrics, plumbing and air conditioning are installed with partitions and floors still open, before any finish. Quoting this phase completely avoids having to re-chip finished finishes to correct an oversight.
Finishes: from the inside out
Tiling and flooring come before painting, and painting before the final joinery (doors, skirting), so as not to damage elements already installed during later, messier phases. The order matters as much as the items themselves.
Why a phased quote makes everything easier
Breaking the quote down following this work order, instead of a single overall price, helps the client understand the process and makes it easier to adjust the scope of the renovation in phases if the total quote exceeds expectations.
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