Home Buying: What Is the Developer’s Trick of “Sneaking in” Extra Space?

The government only approved a construction area of 10,000 square meters, but the developer built 15,000 square meters—5,000 square meters more without property registration certificates. So they “gifted” this extra space to homeowners. That unregistered area is essentially land the developer smuggled out from the government.

When buying a home, buyers often hear terms like “free living space,” such as complimentary terraces, parking spaces, or basements. But these so-called gifts aren’t actually free. They’re just irregularly built areas without property certificates, with their costs baked into the unit price you pay. (In reality, these “gifted” portions constitute illegal construction.)

So why do developers go through all this trouble?
First, they can’t simply change the approved building plan. When a developer acquires land from the government, the allowable floor area is already locked in. For example, if a residential plot has a plot ratio of 1.6 and covers 100,000 square meters, the total building area cannot exceed 160,000 square meters—not even one extra square meter. This limit is specified in the land grant contract signed with the government, and all subsequent approvals—including the five permits for commercial housing and the final completion inspection—must comply.
Second, selling extra area would require reapplying for planning approval and paying additional land premium fees to the government, raising costs.
Technically, a developer could apply to expand the approved area, but that means restarting the project approval process at the Development and Reform Commission, submitting new permit applications, and paying higher land premiums. Thousands of yuan would disappear in the process, making it financially impractical. Since they can’t easily change the approved plans and can’t afford to lower selling prices (especially when home prices haven’t risen), developers find ways to add usable space without increasing the officially recorded floor area. It sounds contradictory, but it’s entirely feasible—features like bay windows, balconies, and equipment rooms aren’t counted toward gross floor area under current regulations. However, all of these still qualify as illegal construction.