What’s Involved in Painting a Commercial Building?

Painting a commercial building has five main steps: site inspection and scope, surface preparation, priming, coating application, and a final inspection. Each step builds on the last, and skipping or rushing any of them is the main reason commercial repaints do not last.

Key takeaways

• How long a paint job lasts depends more on preparation than on the paint itself.
• A good site inspection should find any repairs, access needs, and scheduling issues before you get a final quote.
• If you skip steps like sanding, patching, or priming, the paint will fail early, even if you use premium paint.
• In Queensland, you need a QBCC licensed painter for any job over $3,300, which includes almost every commercial repaint.

Behind the scenes of a commercial repaint

Repainting a commercial building is more than just painting a wall. It is a step-by-step process that protects your building, helps the paint last longer, and keeps your business running smoothly. Knowing how this works helps you spot the difference between a quality job and a rushed one.

Every commercial building is unique. A single-storey shopfront needs different things than a multi-storey office or a warehouse with steel cladding. Still, the process stays the same because it protects your investment, no matter what products are used.

The work usually includes exterior walls, but it can also cover signs, awnings, fire stairs, and common areas, depending on the building. No matter what is included, the same steps are followed from start to finish.

Here's how a repaint actually unfolds on site

Step 1: Site inspection and scope

The first step is to visit the site, not just give a quote from behind a desk. The painter should walk around the whole building, looking for cracks, peeling paint, mould, rust on metal, and any repairs needed before painting starts.

This is also when you plan access. Depending on the building's height, you might need scaffolding, elevated work platforms, or swing stages, which can affect the cost and timeline. A good inspection also considers your business hours so the work causes as little disruption as possible.

After the scope is set, you should get a detailed, itemised quote instead of a vague total. This helps you see if the contractor has really checked your building or is just guessing.

Step 2: Surface preparation

This step decides if your repaint will last five years or fifteen. Preparation usually includes:

• High-pressure cleaning to remove dirt, grime, chalking paint, mould, and salt deposits, especially on coastal or high-humidity sites
• Patching and filling cracks, holes, and damaged render or plasterboard
• Sanding old paint back to create a surface the new coating can grip
• Rust treatment on any exposed steel, gutters, or metal fixtures
• Masking and protection of windows, signage, garden beds, and anything not being painted

Skipping sanding to save time or painting over mould instead of treating it will result in the new paint failing early, sometimes within a year or two. This is where shortcuts often happen, since prep work takes time and is not as obvious in a quote as 'two coats of paint.'

Step 3: Priming

After surfaces are clean, dry, and fixed, the right primer is used. Different surfaces need different primers. Bare metal needs a rust-inhibiting primer, render and masonry need a sealer, and previously painted surfaces may need a bonding primer if the old paint is glossy or chalky.

Primer isn't optional, and it isn't the same as the topcoat. It helps the paint stick to the surface. Without primer, even high-quality paint can peel off.

Step 4: Coating application

Once prep and priming are finished, apply the topcoats, usually two coats for full coverage and durability. The method depends on the building: spray is used for large flat areas, while brush and roller are used for details around windows, signs, and edges.

Let each coat dry properly before applying the next. Rushing the second coat before the first is dry is a common shortcut that can ruin the finish, even if it looks fine at first.

Step 5: Final inspection

Before the job is finished, a final walkthrough checks the coverage, colour consistency, and finish quality across the whole building, not just the easy-to-see areas. This is also when the crew finds and fixes any touch-ups before leaving.

Why the prep stage matters more than the paint

Many business owners think the paint brand decides how long a repaint lasts. In fact, preparation matters most. Paint makers design their products for well-prepared surfaces. If you use premium paint on a poorly prepped wall, it will still peel, bubble, or fade too soon.

This is also why two quotes for the 'same job' can be very different in price. A quote that covers proper cleaning, patching, sanding, and priming will usually cost more at first than one that skips straight to painting, but it will protect your building for years, not just months.

Choose a painter who won't cut corners

In Queensland, any painting job over $3,300 needs a licensed contractor under the Queensland Building and Construction Commission (QBCC). Almost every commercial repaint is above this amount, so licensing isn't just paperwork; it is a legal requirement.

But licensing is only the starting point. It is just as important that your commercial painter understands your building before any work begins.

At Kraudelt Painting, we use this approach for every commercial job. With over 20 years of experience in Brisbane, Logan, and the Gold Coast, we have painted everything from single-storey shopfronts to high-rise offices, and we are CM3 certified for commercial and industrial work. Our experience guides how we plan each job. We check access, surface condition, and your business hours before quoting, so it matches what your building really needs.

We give the same attention to preparation no matter how big or small the job is, because that is what keeps your building protected long after we finish.