By the end of 2025, one idea became clearer—not because it was new, but because it finally had a precise legal shape.
Years of working around land use, valuation, environmental constraints, and governance had already revealed a recurring pattern: disasters rarely begin with the event itself. They begin much earlier, quietly, through decisions that shape space, density, and exposure. What the Bar year did was not introduce this reality for the first time, but give it doctrinal clarity.
I came to understand that what we often treat as planning policy is, in truth, law operating in advance.
Planning is usually described in technical terms—maps, zoning colors, land-use matrices, projections stretching years into the future. Because of this, planning questions are often dismissed as administrative or premature, as if they sit outside the core concerns of law. Legal accountability, we are told, comes later—after damage, after injury, after loss.
But this way of thinking misunderstands what planning actually does.
Once a land use plan or zoning ordinance is adopted, it immediately produces legal effects. It authorizes certain uses, prohibits others, and—most importantly—determines where risk is allowed to exist. When residential use is permitted in flood-prone areas, exposure is not accidental. When development is allowed on unstable slopes, vulnerability is not unforeseen. When natural drainage paths are narrowed or built over, flooding is no longer a surprise.
These outcomes do not begin with nature.
They begin with decisions.
Planning as Preventive Law
Preventive law is not an unfamiliar concept. Building codes exist to prevent collapse. Fire regulations exist to prevent loss of life. Health and sanitation laws exist to prevent outbreaks. None of these wait for injury before they matter. Their legal force lies precisely in their ability to act before harm occurs.
Planning belongs to the same family of law, but it operates earlier and more quietly. It governs a stage where future occupants are unknown, where affected communities cannot yet assert their rights, and where consent to risk is rarely informed. That is exactly why the law requires planning to be rational, evidence-based, and compliant with statutory standards.
Seen this way, planning is not optional policy guidance.
It is a preventive legal duty.
The Legal Foundations Already Exist
This understanding is not theoretical. Philippine law already treats planning as a legally mandated function designed to prevent harm.
The 1987 Constitution, particularly Article II, Section 16, obliges the State to protect and advance the right of the people to a balanced and healthful ecology. This duty is preventive in nature. It does not wait for environmental collapse; it requires governance decisions that avoid it.
The Local Government Code (Republic Act No. 7160) reinforces this by vesting local governments with police power and the authority to enact zoning ordinances in the interest of public safety, health, and general welfare. Police power, by definition, is exercised to prevent harm—not merely to respond after the fact. Land-use regulation is one of its clearest preventive expressions.
The Urban Development and Housing Act (Republic Act No. 7279) explicitly requires rational land use and the avoidance of danger areas for human settlements. Allowing communities to be established or intensified in known hazard zones is therefore not just a planning lapse; it is a failure to comply with a statutory preventive mandate.
Environmental laws strengthen this framework. The Philippine Environmental Impact Statement System (Presidential Decree No. 1586) requires environmental impact assessment before project approval. The purpose of the EIA is not remediation but anticipation—to inform decisions so that environmental harm is avoided at the outset.
More recent legislation, such as the Climate Change Act (Republic Act No. 9729) and the Disaster Risk Reduction and Management Act (Republic Act No. 10121), explicitly require risk-informed and hazard-based planning. These laws translate scientific knowledge into legal obligation. Where climate and disaster risks are known or knowable, planning institutions are required to integrate them into land-use decisions.
With the enactment of the Philippine Ecosystem and Natural Capital Accounting System Act (Republic Act No. 11995), the preventive character of planning is made even clearer. By requiring the integration of natural capital considerations into policy and planning, the law recognizes that future environmental loss must be accounted for before decisions are made—not after damage is done.
What the Supreme Court Has Already Said—Implicitly
Philippine jurisprudence has long supported this preventive approach, even if the Court has not always used the term “preventive law.”
In Oposa v. Factoran, the Supreme Court recognized the right of present and future generations to a balanced and healthful ecology, allowing legal action to proceed even before irreversible harm had occurred. The case stands for the principle that environmental protection is anticipatory, not merely remedial.
In MMDA v. Concerned Residents of Manila Bay, the Court emphasized the State’s continuing obligation to protect and rehabilitate the environment. The duty recognized was not episodic or reactive; it was ongoing and proactive—consistent with the idea that governance failures upstream are legally relevant.
In Resident Marine Mammals v. Reyes, the Court applied the precautionary principle and underscored the importance of environmental compliance at the planning and approval stage. While framed in terms of precaution, the decision affirmed that legality is assessed before harm occurs.
Similarly, in West Tower Condominium Corp. v. First Philippine Industrial Corp., the Court focused on risk creation and foreseeability. The ruling made clear that where risk is foreseeable, and proximity exists, a duty arises—even before catastrophic damage fully unfolds.
Taken together, these cases show a consistent judicial posture: the law does not require disaster as a precondition for accountability. Where duty, foreseeability, and legal authority intersect, courts are prepared to intervene upstream.
Why Planning Is Not a Premature Legal Question
The argument that planning issues are “premature” usually rests on the absence of visible injury. But preventive law does not require collapsed homes or lost lives before it can be questioned. If it did, building codes, environmental clearances, and zoning regulations would only become relevant after failure—rendering prevention meaningless.
Once planning is mandated by law and formally adopted, a duty already exists. Once hazard maps, flood histories, and climate data are available, foreseeability already exists. And once plans authorize exposure to known risks, the legal issue is already present.
Damage does not create the breach.
Damage merely confirms what planning already allowed.
Planning, Climate Risk, and Accountability
Climate change has only sharpened this reality. Risk today is rarely uncertain. Flood pathways are mapped. Rainfall patterns are documented. Slope hazards are classified. Climate projections are publicly available. In legal terms, this means that discretion narrows and responsibility expands.
True adaptation does not mean learning to live with avoidable harm. It means adjusting plans, zoning, and land-use decisions so that foreseeable harm is not embedded into future development. Improving evacuation plans while allowing the same dangerous land uses is not adaptation; it is accommodation of failure.
A Closing Reflection
Understanding planning as preventive law changes how accountability is framed. Zoning maps become evidence, not background. Hazard studies become proof of foreseeability, not optional references. Planning approvals become legally reviewable acts, not purely political choices.
Justice should not begin with compensation after loss.
It should begin with decisions made when harm is still avoidable.
That is the perspective 2025 clarified for me—not as a new discovery, but as a consolidation of experience, doctrine, and observation. As we move forward in an era of climate risk, planning must be treated for what it truly is: the law’s first and most consequential opportunity to prevent harm.
Long before the waters rise, the law already has something to say.
Real LexEcon 