Off-plan apartment customization: the carmaker lesson

TL;DR

• Porsche offers more than 1,000 factory personalization options and reported that average revenue per car with those options doubled over five years (Porsche Newsroom, 12 March 2025). In June 2026, Toyota's new CEO told shareholders that a growing number of specifications and variants was driving up costs (CarExpert, 21 June 2026).
• The car configurator bundles two things most residential developers keep apart: a short menu engineered by the factory, and a price on screen before the buyer signs. In São Paulo's high end, fewer than 40% of buyers took up the customization packages developers offered, because the packages made units feel semi-standard (Valor Econômico, 4 October 2024).
• The argument: off-plan apartment customization sells poorly because it arrives late and offers too much. Fewer options, priced inside the sale and frozen on a date tied to the construction schedule, win more take-up than an open floor plan.

On a premium carmaker's website, a buyer spends twenty minutes choosing paint, wheels, leather and driver-assistance packs, watches the price move with every click, and leaves with a code that saves that exact car. On a luxury off-plan launch website, the same buyer downloads a PDF brochure with a typical floor plan, a handful of renderings and a show apartment nobody will receive in that form. Customization exists, but it lives somewhere else: after contract, in a separate appointment, with a tight deadline and a budget nobody saw when they signed.

That looks like an interface gap. It points to something deeper, and it is worth a careful look before copying the configurator, because the car industry itself is rethinking the size of its menu.

What a carmaker sells when it sells choice

Porsche is the best-documented case. Presenting its 2024 results, the company said its Exclusive Manufaktur program already offered more than 1,000 options, that average revenue per vehicle with those options had doubled over the previous five years, and that the unit's capacity would be expanded significantly (Porsche Newsroom, 12 March 2025). In January 2026, announcing 279,449 cars delivered in 2025, the brand again named the expansion of customization, through Exclusive Manufaktur and Sonderwunsch, as an important part of its strategy (Porsche Newsroom, 16 January 2026).

Three details explain why this works in Stuttgart. Every option has a published price and adds up on screen, so the decision to spend more happens inside the purchase. Every option enters the production line on a date, and after a certain point the order closes. And personalization revenue is reported as revenue, with its own metric, which gives it an owner and a target.

The same industry is cutting combinations

The enthusiasm for configurators hides an opposite trend. At Toyota's June 2026 shareholders meeting, new CEO Kenta Kon said that visiting the development divisions he saw a growing number of specifications and variants, and that this was pushing costs up (CarExpert, 21 June 2026). A volume carmaker said in public that too much choice is expensive for whoever builds the product.

Both moves fit together. Porsche charges a premium for personalization on a small number of high-margin cars; Toyota trims variants across a huge number of lower-margin cars. What they share is that the factory decides how many choices the process can absorb before offering any of them to the customer.

The configurator does not replace the showroom either. McKinsey's 2026 mobility consumer survey found that 34% of new-car buyers skip online search and configuration entirely and go straight to a dealer, rising to 41% among buyers of combustion cars (McKinsey, 14 July 2026). Two thirds take a digital or mixed route. The tool serves the majority without retiring the counter, a point that applies just as much to how luxury real estate is marketed in 2026.

Why off-plan customization sells poorly

In October 2024, a real estate supplement published by Brazil's Valor Econômico reported that São Paulo's high-end developers had started offering finish packages and floor-plan changes signed by well-known architects, and that fewer than 40% of buyers accepted them. The reason given was that the packages made apartments feel semi-standard, the opposite of what a luxury buyer wants (Valor Econômico, 4 October 2024).

The figure is almost two years old and works as a symptom. It shows developers copying carmakers halfway: they took the catalogue and left behind the on-screen price and the timing. A package offered after contract reaches buyers who have already spent their appetite for decisions and already sized their mortgage without it. And a package by a famous architect, offered to every unit in the tower, communicates exactly what the buyer fears: the neighbour will have the same kitchen.

What developers can borrow

• Choice inside the sale. The options list belongs in the same place the buyer sees the floor plan and the unit price, before the offer. In the sales gallery, that is a screen showing the actual unit; online, a page per unit type.
• A short menu, designed by construction. The number of alternatives comes from the schedule and the engineers, not from marketing. Three finish palettes and two layout variations the site can build without rerouting risers sell better than thirty combinations the contractor accepts reluctantly.
• A visible freeze date. Carmakers close the order on a date. Developers can publish the cut-off for each floor and use it as a legitimate, technically grounded reason to decide.
• Options revenue with an owner. If Porsche tracks revenue per car with personalization, a developer can track options revenue per unit and take-up by unit type. Without a metric, customization becomes a service cost.

What developers cannot copy

A car leaves the plant in weeks and travels alone. An apartment takes years to build and shares structure, facade, service shafts and a homeowners association with dozens of other units. Every individual choice carries a collective schedule risk no dealership faces.

Exclusivity also runs in opposite directions. A rare paint colour is seen on the street and signals the owner's taste. Apartment customization is almost never seen by anyone outside the home, and what a luxury buyer does see is the list of options every other buyer in the tower received. So the short menu needs a layer carmakers can skip: the sense that the chosen combination belongs to the family, with a name, an interior design brief and a record at handover.

Then there is aftercare. Every installed option becomes a warranty item with its own supplier, and every change to the image of the unit has to stay traceable to the contract, a problem already visible in the way off-plan renderings escape the new listing photo laws.

From brochure to configurator

The PDF brochure was designed to show a closed product. The configurator was designed to sell priced decisions. A luxury developer who wants the second has to do the less visible work first: cut options with the engineers, price each one and put the freeze date into the sales material. The digital tool comes last and costs less than it seems. The hard part is accepting that giving a luxury buyer fewer choices raises the odds that they choose.

Frequently asked questions

Does off-plan apartment customization raise revenue per unit?

It does when options carry a published price and enter the offer. Porsche reported that average revenue per car with personalization options doubled in five years (Porsche Newsroom, 12 March 2025). In residential, the effect depends on take-up, which stayed below 40% in São Paulo's high end when options came as packages after contract (Valor Econômico, 4 October 2024).

How many customization options should a developer offer?

The number should come from the construction schedule and the engineers. The latest signal from the car industry points to cuts: Toyota's CEO said in June 2026 that too many variants drive up costs. A few finish palettes and a few layout variations that do not touch the risers are the safest starting point.

Can an online configurator replace the sales gallery?

No. In McKinsey's 2026 survey, 34% of new-car buyers skipped online configuration and went straight to a dealer. The digital tool widens the reach of choice, and the sales gallery remains where a luxury buyer confirms what they chose.