Ask a commercial broker what a stacking plan is and you’ll get an answer before you finish the question: the floor-by-floor cross-section of a building showing every unit, who’s in it, and what’s coming up for renewal. Ask an actual condo buyer or apartment renter and most have never heard the term. Which is a shame, because it might be the most useful drawing in the whole industry.

A back-office tool by accident

For decades the stacking plan stayed in the back office. Asset managers used it to track lease expirations. Brokers used it to find contiguous space for a tenant who needed two floors. Someone built it in Excel, someone else exported it to PDF, and it circulated internally under a filename like Stacking_2024_v9. Nobody treated it as marketing material because nobody designed it for the public.

But look at what the thing actually does. It answers the exact questions buyers and renters walk in with. What’s still available? Where is it in the building? How does the price compare to the unit two floors up? A photo gallery can’t tell you any of that. Neither can a page of floor plans sorted by square footage.

Then it became clickable

The recent shift is that the stacking plan stopped being a static image. Developers can now put a live, clickable version right on the project website, color-coded by availability, tied to floor plans and pricing, updated the minute a unit sells or leases. Planpoint, which runs stacking plans for developers like Cogir and Brigil, is one of the platforms that made this cheap enough for ordinary projects rather than just flagship towers.

The business case is not complicated. Every question the stacking plan answers on the website is a call the sales office doesn’t take. And a visitor who already knows the two-bedroom on nine is still open is a much warmer lead than someone who filled out a contact form asking what’s left.

It also does something to buyers

On a spreadsheet, scarcity is a number. On a stacking plan, it’s a building you can watch fill up, floor by floor. Prospects notice. Sales teams using these tools say people show up to appointments already attached to one specific unit, because they’ve been checking on it for a week and half expect someone else to grab it.

And none of this needs a six-figure custom build anymore, which might be the real story. The stacking plan spent forty years as an insider document. Publishing one now costs less than commissioning a single rendering.

So if your project website still opens with a grid of PDF floor plans, you already own the fix. It’s sitting in your asset manager’s spreadsheet, waiting for a promotion.