Due Diligence

Environmental Due Diligence in Coastal Projects of Quintana Roo

March 15, 2026 — Enrique Benet-Gregg

Environmental Due Diligence in Coastal Projects in Quintana Roo

The acquisition or development of a coastal property in Quintana Roo activates a set of federal and state environmental obligations whose non-compliance may result in the nullification of authorizations, environmental criminal liability and, in the most serious cases, demolition of works and irreversible revocation of concessions. A rigorous environmental due diligence is not a courtesy procedure: it is the technical-legal instrument that determines whether the project is executable, at what regulatory cost and under what conditions.

Applicable Regulatory Framework

The coastal environmental regime in Mexico is articulated around four central regulatory bodies. The General Law on Ecological Balance and Environmental Protection (LGEEPA), published in the DOF on January 28, 1988 and with amendments in force to date, establishes in its articles 28 and 29 the mandatory requirement of an Environmental Impact Statement (MIA) for works that affect coastal ecosystems, wetlands or federal zones. Its Regulation on Environmental Impact Assessment specifies in article 5, subsection X, that any tourism, residential or commercial development in the coastal zone requires prior authorization from the Ministry of Environment and Natural Resources (SEMARNAT).

The General Law on National Assets (LGBN), in its articles 119 through 131, regulates the Federal Maritime-Terrestrial Zone (ZOFEMAT), a twenty-meter strip inland from the ordinary maximum high water line. No private party may construct in ZOFEMAT without express concession from the competent federal authority. Regarding the administrative authority competent to grant such concessions, it is worth clarifying the current status: historically attributed to the Ministry of Communications and Transportation, this power was subject to successive reassignments; currently the Ministry of Infrastructure, Communications and Transportation (SICT) maintains powers in this matter pursuant to its current internal regulations, although SEMARNAT exercises concurrent competencies with respect to the ecological components of the federal zone, and in certain coastal municipalities of Quintana Roo collaboration agreements have been executed involving federal delegations and municipal authorities in the management and oversight of the strip.1 Article 126 of the LGBN establishes that concessions are non-transferable without administrative authorization, which directly conditions the structuring of any purchase and sale transaction.

Additionally, the General Law on Wildlife and NOM-059-SEMARNAT-2010 (Environmental Protection of Native Species of Mexican Flora and Fauna, published in the DOF on December 30, 2010) impose critical restrictions when the property contains or is adjacent to habitat of protected species, particularly marine turtles, crocodiles and migratory birds present in the coastal strip of the Mexican Caribbean.2

Protected Natural Areas and Planning Programs

Quintana Roo concentrates some of the most extensive Protected Natural Areas (ANP) in the country, including the Sian Ka’an Biosphere Reserve, Cozumel Reefs National Park and the Mexican Caribbean Biosphere Reserve. The presidential decrees establishing them, together with their Management Programs approved by the National Commission of Natural Protected Areas (CONANP), establish strict zoning that may absolutely prohibit any type of development. A property apparently outside the polygon of an ANP may, nevertheless, be located in its buffer zone, where permitted uses are considerably more restrictive.

The Local Ecological Ordering Program (POEL) of the corresponding municipality (Solidaridad, Tulum, Benito Juárez, Cozumel, among others) and the Marine and Regional Ecological Ordering Program of the Gulf of Mexico and Caribbean Sea, published in the DOF on November 24, 2012, must be verified to confirm the suitability of the projected land use. Lack of consistency between the project and the applicable environmental management unit (UGA) is sufficient cause for SEMARNAT to deny environmental impact authorization, regardless of the technical quality of the MIA.

In the specific case of the coastal corridor of Tulum, due diligence must go beyond verification of already-published ANP decrees. The coastal strip of the municipality is subject to active federal designation processes that, as of the publication date of this article, have not formally concluded. Under article 65 of the LGEEPA, publication of a notice or preliminary declaration in the DOF may impose anticipatory restrictions before the final decree is issued. Complete due diligence must therefore review not only existing ANP decrees, but also declaration notices and proposed decrees published in the DOF that may anticipatorily affect permitted uses in the property polygon.

The Mangrove Regime: The Most Restrictive Factor in Coastal Due Diligence

Although mangroves typically appear as merely one element within lists of environmental restrictions, they constitute in practice the principal factor that can render a coastal project in Quintana Roo absolutely unviable. The NOM-022-SEMARNAT-2003, published in the DOF on April 10, 2003 and updated through amendment published on March 7, 2012, establishes an absolute prohibition on removal, filling, transplanting, pruning or any work or activity that affects the integrity of the mangrove ecosystem, such prohibition admitting no exception derived from prior environmental impact authorizations, municipal zoning or property title.

The practical relevance of this norm transcends what its literal wording suggests. The documented presence of mangrove within a property, or in its immediate vicinity, can determine that the entirety of the surface becomes technically non-developable, even when the environmental impact resolution had been granted under a prior regime or on the basis of an incomplete vegetation characterization. In proceedings in which IBG Legal has participated as representative of developers, it has been established that environmental authorities and judicial bodies have applied the criterion that the pre-existence of mangrove not declared in the MIA constitutes a defect that invalidates the resolution, regardless of the time elapsed since its issuance.

The essential practical step is the commission of a vegetation survey prepared by a specialist in botany or certified ecology, with identification of vegetation coverage by polygon and classification in accordance with NOM-022, prior to the signing of any letter of intent or promise of sale. Executing this verification after committing resources to the acquisition process exposes the buyer to non-recoverable losses when the survey reveals mangrove presence incompatible with the project. The investment in this prior study, whose cost is marginal relative to the value of the transaction, is the risk management measure with the highest return in any coastal due diligence.

Cenotes and the Aquifer System of the Yucatán Peninsula (SAPY)

A regulatory risk frequently underestimated in coastal operations in Quintana Roo is that derived from the subsurface hydrological system of the Yucatán Peninsula. The Aquifer System of the Yucatán Peninsula (SAPY) forms a karstic network of regional scope that underlies virtually the entirety of the state’s territory. Any activity that affects the infiltration, quality or flow of the aquifer is subject to regulation by the National Water Commission (CONAGUA) in accordance with the National Waters Law and its Regulations, regardless of whether the property is or is not coastal and whether it has authorization for environmental impact before SEMARNAT.

Properties located in the karstic zone, which in Quintana Roo includes the Tulum and Playa del Carmen corridors, may contain cenotes, inundated caverns or substrate fractures that connect directly with the aquifer. The construction of foundations, the installation of wastewater treatment systems or the handling of substances on the surface may constitute activities subject to concession or to preventive technical opinion from CONAGUA. The intersection between SAPY protections and coastal development regimes has generated verification procedures and federal closure actions in the Tulum and Playa del Carmen corridors, and the regulatory trend points toward a hardening of CONAGUA’s criteria in this matter. A complete due diligence in karstic zone must include an independent hydrological evaluation that determines the property’s connectivity with the aquifer and applicable concession thresholds.

Analysis of the MIA: What the File Must Reveal

In an acquisition transaction, the buyer must obtain and analyze the authorized MIA of the pre-existing property or project, the corresponding environmental impact resolution and the compliance history of the conditions imposed. Articles 35 and 35 Bis of the LGEEPA allow SEMARNAT to revoke an environmental authorization when the proponent fails to comply with the conditions established. Acquiring a property with a revoked or non-compliant authorization transfers a quantifiable environmental liability and, potentially, joint and several responsibility.

Due diligence must verify: the validity of the authorization; compliance with mitigation and compensation measures; the existence of inspection and monitoring procedures open by the Federal Procuracy for Environmental Protection (PROFEPA); and any inspection report, security measure or closure recorded in the property’s administrative file, consultable through SEMARNAT’s Environmental Impact File Query System (SINAT).

Relevant Judicial Criteria

The Collegiate Courts of the XXVII Circuit have held, in criteria not published as formal case law but invoked in proceedings in which IBG Legal has participated as representative of parties, that the absence of environmental impact authorization constitutes an original defect that is not susceptible to subsequent convalidation through administrative regularization, and that works executed in contravention of the LGEEPA may be subject to demolition ordered in administrative contentious proceedings. This criterion is especially relevant for sale and purchase operations where the seller transfers a partially constructed development without a current EIA.

The First Chamber of the SCJN has developed, in various resolutions relating to the right to a healthy environment enshrined in article 4 of the Constitution, the reasoning that said right operates as a direct constitutional limit to property rights and free enterprise. In accordance with the criteria sustained in these matters, no property title or prior concession can validly be opposed against an environmental restriction derived from a public order norm. For the identification of theses formally published in the Federal Judicial Weekly regarding this matter, it is recommended to consult directly the IUS SCJN under the descriptors healthy environment, private property, balancing, given that the evolution of the criterion has been reflected in multiple isolated theses and case law throughout the Tenth and Eleventh Epochs.

Practical Implications for the Structuring of the Operation

A complete environmental due diligence must produce, before the closing of any coastal operation, the following deliverables: a map of environmental restrictions and polygon overlap (ANP, ZOFEMAT, mangrove, wetland, cenotes and area of influence of the SAPY); a matrix of current authorizations and their compliance status; an inventory of identified environmental liabilities with remediation cost estimation; and a legal opinion on the enforceability of the project in accordance with the applicable UGA.

Representation and warranty clauses in sale and purchase or investment contracts must include specific statements regarding the environmental condition of the property, with escrow or price retention mechanisms conditioned on verification of compliance. The omission of these clauses leaves the purchaser without contractual recourse against environmental liabilities discovered post-closing.

Considerations regarding regulatory timelines: An element frequently omitted in the negotiation of coastal investment contracts is the impact of SEMARNAT resolution times on the operation’s calendar. For planning purposes, the following approximate horizons should be considered:

Preventive Report: resolution timeline of approximately 20 to 60 business days, applicable when the project is located within a previously evaluated partial plan or when the works do not generate significant impacts additional to those already evaluated.
EIA in particular modality: resolution timeline of 60 business days in accordance with article 35 of the LGEEPA, although in administrative practice effective timelines range between 4 and 8 months, considering requests for additional information and preventions.
EIA in regional modality: timeline that in practice may extend between 12 and 18 months, given that it requires studies of greater technical complexity, consultation with concurrent agencies and, where applicable, public or indigenous consultation processes.

Suspensive conditions in sale and purchase contracts or investment agreements must be calibrated in accordance with these horizons. A suspensive condition that grants the purchaser 90 days to obtain environmental impact authorization is legally inoperative if the project requires regional EIA; its inclusion without the corresponding temporal adjustment may place the purchaser in a situation of contractual breach before the authority resolves, with the consequent loss of anticipated payments or agreed penalties.

Operative Conclusion

The coastal zone of Quintana Roo is one of the most complex regulatory environments in Mexico in environmental matters. The density of federal norms, the overlap of competencies between SEMARNAT, SICT, CONAGUA, CONANP, PROFEPA and the municipalities, and the current constitutional case law require treating environmental due diligence as a critical and non-delegable phase of the investment process. The concrete consequences of insufficient due diligence in this environment are not abstract: they comprise the revocation of authorizations, the judicial demolition of already executed works, the disqualification from obtaining new concessions and environmental criminal liability of natural persons in accordance with articles 420 and following of the Federal Criminal Code. The cost of identifying and managing these risks before closing is always quantifiable; the cost of litigating them afterwards is frequently not.

IBG Legal is a boutique law firm specialized in litigation and transactional advisory in real estate, environmental, and corporate matters, with headquarters in Cancún and offices in Mexico City and Querétaro. Our practice in coastal environmental matters includes the representation of developers and investors in ZOFEMAT concession cancellation proceedings, review remedies before SEMARNAT, inspection proceedings before PROFEPA, and constitutional amparo litigation before the Collegiate Courts of the XXVII Circuit, as well as the structuring of environmental due diligence and the negotiation of representations and warranties clauses in coastal acquisition transactions in Quintana Roo and the Riviera Maya. This combination of litigation capacity and transactional advisory enables the identification not only of documentary risks, but also of enforcement risks that determine the actual viability of the project. For specialized advice on this matter, please contact us.

1 Administrative competence over ZOFEMAT has been subject to successive organizational reforms. It is recommended to verify, at the time of each transaction, the delegation of powers in force in accordance with the Internal Regulations of SICT published in the DOF, as well as the collaboration agreements executed between the federation and the government of the state of Quintana Roo or its coastal municipalities, which may assign management or oversight functions to local authorities without transferring concession ownership.

2 NOM-059-SEMARNAT-2010 was published in the DOF on December 30, 2010. Various secondary sources refer to modifications to Normative Annex III (species list) in subsequent years; however, given that it has not been possible to confirm a formal update through an agreement published in the DOF with a specific date in 2019, the reference in this article is limited to the original 2010 publication. It is recommended to consult the DOF directly and the SEMARNAT portal to verify the regulatory status in force at the time of each transaction.

Sources and References

Legislation

General Law on Ecological Balance and Environmental Protection (LGEEPA), DOF January 28, 1988, as amended through March 2026. Articles 4°, 28, 29, 35, 35 Bis, 65.
Regulations of the LGEEPA on Environmental Impact Assessment, DOF May 30, 2000, as subsequently amended. Article 5°, subsection X.
General Law on National Property (LGBN), DOF May 20, 2004, as amended through March 2026. Articles 119 through 131.
General Law on Wildlife, DOF July 3, 2000, as amended through March 2026.
Mexican Official Standard NOM-059-SEMARNAT-2010, Environmental Protection of Native Species of Mexican Flora and Wildlife, DOF December 30, 2010. (See footnote 2 regarding subsequent updates.)
Mexican Official Standard NOM-022-SEMARNAT-2003, which establishes specifications for the preservation, conservation, sustainable use, and restoration of coastal wetlands in mangrove zones, DOF April 10, 2003; amendment DOF March 7, 2012.
Law on National Waters, DOF December 1, 1992, as amended through March 2026.
Political Constitution of the United Mexican States, article 4°, fifth paragraph (right to a healthy environment), reform DOF February 8, 2012.
Federal Criminal Code, articles 420 et seq. (crimes against the environment).
Ecological Land Use Planning Program for the Gulf of Mexico and Caribbean Sea, DOF November 24, 2012.

Judicial Criteria

Collegiate Courts of the XXVII Circuit (Quintana Roo): criteria not published as formal jurisprudence sustained in proceedings in which IBG Legal has participated as representative of parties, regarding inadmissibility of regularization of works constructed without environmental impact authorization and application of demolition measures in administrative contentious proceedings. For formally published theses on related matters, consult the Federal Judicial Gazette under the corresponding descriptors.
First Chamber of the SCJN: criteria on the right to a healthy environment as a constitutional limit to property rights and free enterprise, Tenth and Eleventh Epochs. To identify specific theses with IUS registration number, consult the search engine of the Federal Judicial Gazette at sjf.scjn.gob.mx under the descriptors healthy environment, private property, balancing.

Official Sources

Official Journal of the Federation (DOF): decrees on protected natural areas applicable to Quintana Roo, including the Sian Ka’an Biosphere Reserve, Cozumel Reefs National Park and Mexican Caribbean Biosphere Reserve; notices and declaration projects under review.
CONANP: Current Management Programs of protected natural areas in Quintana Roo, available at www.conanp.gob.mx.
CONAGUA: Records of concessions and administrative acts relating to the Yucatan Peninsula Aquifer System (SAPY), available through public information access requests (LFTAIP) and through the Public Registry of Water Rights (REPDA).
PROFEPA: Records of inspections and administrative proceedings in the coastal zone of Quintana Roo, available through public information access requests (LFTAIP).
SEMARNAT: Environmental Impact Records Consultation System (SINAT), available at www.semarnat.gob.mx.
Official Gazette of the State of Quintana Roo: Local Ecological Planning Programs (POEL) of the municipalities of Solidaridad, Tulum, Benito Juárez and Cozumel.

Legal Doctrine

Brañes, Raúl. Manual of Mexican Environmental Law. 2nd ed. Economic Culture Fund / Mexican Foundation for Environmental Education, 2000.
González Márquez, José Juan. Liability for Environmental Damage in Mexico. Metropolitan Autonomous University, 2002.
Anglés Hernández, Marisol. Legal Framework of Protected Natural Areas in Mexico. Institute of Legal Research, UNAM, 2014.
Anglés Hernández, Marisol, and Navarrete Poblete, Marco Antonio. Law, Environment and Sustainability: Reflections from Mexico. Institute of Legal Research, UNAM, 2021. Available at www.juridicas.unam.mx. (Contains updated analysis on the regulation of coastal ecosystems and the evolution of the environmental impact assessment framework in Mexico with reference to recent jurisprudential developments.)