From Excel Grid to Website Centrepiece: How the Stacking Plan Went Digital

Every industry has a document that refuses to die. Architects have the napkin sketch, lawyers have the redline, and real estate has the stacking plan, the floor-by-floor grid that has tracked who occupies what since long before anyone said the word proptech.

The surprising part is where the old grid ended up.

Three generations of the same drawing

The first generation was analog. Hand-drawn grids, whiteboards in leasing offices, updated with a marker and the occasional sticky note. The second generation moved into Excel: colour-coded cells standing in for units, the file living on one analyst's desktop and going around by email as Stacking_Plan_FINAL_v7.xlsx. Plenty of asset managers still work this way, and for internal tracking it honestly does the job.

The third generation is the one changing how buildings get marketed. The stacking plan now sits as a live, interactive layer on the project website itself. Click a floor and you see its units. Click a unit and you get the floor plan, the price, and whether it's still available, all pulled from the same data the sales team maintains. A document that used to summarize the building for insiders now sells it to everyone else.

Why this happened now

Partly it's the audience. People raised on Zillow, Airbnb and airline seat maps expect to browse inventory visually and figure things out on their own. To that crowd, a "contact us for availability" button might as well be a fax number.

The other part is cost. Interactive building visuals used to mean agency work: custom development, long timelines, a budget only a flagship tower could carry. SaaS ate all of that. A marketing coordinator can now build an interactive stacking plan in an afternoon with a visual editor, drop it into the site with an embed code, and manage availability from a dashboard. Planpoint, a Montreal company that has been at this for a while, charges month to month with no contract at all, which tells you how far the economics have moved from the bespoke era. It's also why mid-sized developers are picking up the format now, not just the marquee projects.

The spreadsheet survived, by the way

Digitization didn't kill the Excel stacking plan so much as hand it a second job. Data that used to sit in a locked file now works both sides of the house: asset management internally, marketing externally, one source of truth instead of two documents slowly drifting apart.

Real estate tends to handle change this way. The industry rarely throws out its old paperwork, it just gives it a bigger role. The rent roll became the property management system. The listing sheet became the MLS. And the stacking plan, forty-odd years after somebody first sketched one on a whiteboard, became the most clicked thing on the project website. Not bad for a grid of coloured rectangles.