The property I'm buying on condition improved on its own before the condition happened - who gets the benefit of that improvement?

The setting: an obligation under a suspensive condition

Article 1189 deals with an obligation to give a specific thing that depends on a suspensive condition — the duty to deliver takes effect only if a future, uncertain event occurs. While everyone waits for that event, the thing can change: it may be lost, it may deteriorate, or, as in your case, it may improve. The article lays down who wins and who loses from those changes during the pendency of the condition. Its aim is to settle in advance how gains and losses are allocated between the person who must give the thing and the person who is due to receive it.

Natural improvements go to the creditor

Where the thing gets better on its own, the law hands the gain to the person awaiting it. The article states that if the thing is improved by its nature, or by time, the improvement shall inure to the benefit of the creditor. As the buyer under the condition, you are that creditor. So an improvement that comes from the thing's own nature or simply from the passage of time — land that gains from natural accretion, a young animal that matures, a plant that grows — accrues to you. When the condition is fulfilled and the thing is delivered, you take it with the improvement, and you owe nothing more for it.

Improvements made at the debtor's expense are different

Not every improvement is a free gift to the creditor. The article draws a line for improvements the debtor pays for: if it is improved at the expense of the debtor, he shall have no other right than that granted to the usufructuary. A usufructuary who improves property may generally remove the improvements if that can be done without damage, or otherwise set off their value, rather than simply hand them over for nothing. So if your seller spent money enhancing the thing, he does not lose that outlay outright — his position mirrors a usufructuary's. It is the passive, natural improvement that inures to you; the paid-for one is treated separately.

Why the rule works this way, and its limits

The reasoning ties back to how conditions operate: once the condition happens, the obligation is treated as having existed from the beginning, so the creditor takes the thing as it now stands — enjoying natural gains just as he would bear faultless deterioration. This applies to obligations to give a determinate thing under a genuine suspensive condition, not to an ordinary, already-perfected sale with nothing left hanging. And the benefit is limited to improvements by nature or by time; improvements the debtor funded follow the usufructuary rule instead. Within those bounds, the answer to your question is simple: the natural improvement is yours.

Cases citing this provision

These Supreme Court decisions cite the provision above. We list them so you can read them yourself; the summaries of what each decided are not ours to give.

• National Power Corporation vs Socorro T. Posada, Renato Bueno, Alice Balin, Adrian Tablizo, et al, G.R. No. 191945, March 11, 2015 — read the decision on LawPhil →
• Agustin P. Dela Torre vs. The Hon. Court of Appeals, et al./Philippine Trigon Shipyard Corporation, et al. vs. Crisostomo G. Concepcion, et al, G.R. No. 160088 / G.R. No. 160565, July 13, 2011 — read the decision on LawPhil →
• Sergio Osmeña III, et al. vs. SS etc., et al, G.R. No. 165272, September 13, 2007 — read the decision on LawPhil →
• Heirs of TImoteo Moreno, et al. vs. Mactan-Cebu International Airport Authority, G.R. No. 156273, October 15, 2003 — read the decision on LawPhil →

Related provisions

• Civil Code, Article 1189 — Loss, Deterioration, Improvement Pending a Suspensive Condition