The titled area is not necessarily the usable area; identify restrictions and each authorisation’s scope before designing or purchasing.
Locate water, vegetation and existing works
During the visit, record streams, drains, observed springs, wet areas, vegetation and nearby works without assigning definitive legal categories solely from appearance. A depression dry that day may need investigation, and an artificial channel may have a different framework from the one assumed by the seller. Ask the technical adviser to connect observations with mapping, topography and background records. Keep located photographs and distinguish direct observations from neighbours' accounts. Include bridges, pipes, fill, walls and existing abstraction works in the inventory, asking for their supporting instruments. Decree 2811 addresses assets related to water and channels, while Decree 1076 regulates interventions affecting those resources. Do not infer freedom to intervene because water crosses private land. Equally, do not treat all vegetation as an absolute obstacle. This initial stage should produce precise property-specific questions rather than either a commercial promise of unrestricted use or an unsupported conclusion that the project is impossible. The evidence will determine what further review is needed.
Compare mapping layers and applicable instruments
Identify municipal land classification, protection areas, catchment instruments and environmental categories potentially affecting the property. Law 388 recognises higher-ranking planning determinants within their respective competence, so municipal use information alone may be incomplete. A viewer helps identify overlaps, but establish the layer's date, scale, source and supporting instrument. Request clarification where a boundary appears to cross the lot or mapping cannot locate it precisely enough. For a protected area, obtain the relevant declaration, boundary and management plan; do not assume all categories impose identical rules. In Medellín and neighbouring municipalities, verify the instrument and authority serving the actual location rather than relying on a generic reference to the Aburrá Valley. Connect each restriction with its document and consequence for the project. Keep questions requiring formal answers visible instead of presenting a map screenshot as permission or complete certification. A useful assessment explains both what the mapping indicates and what its scale or legal status cannot establish for the proposed works.
Distinguish channel, water protection zone and project setbacks
Do not position a house by measuring a universal distance from water visible during the viewing. Decree 1076 regulates delineation of water protection zones and technical criteria, referring to the permanent channel and associated protection or conservation area. Decree 2811 and municipal rules also need interpretation within the applicable framework. Ask the professional to identify the relevant boundary and provision and whether an applicable delineation instrument exists. A line drawn by the seller does not establish that the remaining space can be built on. Topography should locate the project rather than invent an official boundary. If information remains outstanding, retain a conditional scenario and avoid ordering a home for a location that may prove incompatible. Environmental restrictions, flood hazard and planning setbacks can interact without being identical questions. The report should explain each and its consequences rather than reducing them to one commercial figure. Maintain the supporting documents and the technical interpretation together so the proposed layout can be reviewed consistently.
Describe every proposed intervention
The project includes more than its building. Identify access, bridges, pipe crossings, drainage, stabilisation, earthworks, affected vegetation and wastewater disposal. Article 2.2.3.2.12.1 of Decree 1076 regulates works occupying channels and the corresponding authorisation; a small crossing may need assessment even if the seller considers it a domestic improvement. Do not treat abstraction permission as bridge approval or a building licence as general authority to alter a stream. Ask about the route for each intervention before the competent authority and the necessary studies. For existing works, request instruments and conditions rather than assuming age proves legality. A supplier may design a technically possible solution not yet shown to be permissible at that location. The purchaser should compare complete alternatives, including a different entrance or layout reducing intervention. Decisions should reflect actual works and dependencies rather than only a drawing of the house. Record who obtains each result and how a changed design affects the earlier enquiries or permissions.
Request answers with clear location and scope
Prepare enquiries identifying the folio, relevant coordinates, drawing and activity. Law 99 allocates environmental competence, while the municipality decides planning matters within its remit. Seek direction if the responsible body is unclear and keep any referral or explanation. General guidance does not necessarily authorise an individual project; establish which document was received, its scope and conditions. If an instrument concerns another property, holder or design, do not treat it as approval for this proposal without assessment. Ask about restrictions and procedures rather than requesting a commercial guarantee of unrestricted activity. When responses appear inconsistent, have their assumptions reviewed together. Differences in scale, drawing version or competence may explain the result. The file should distinguish technical facts, applicable rules and decisions actually issued. This organisation makes project changes easier without attributing one institution's powers to another. Ensure material responses reach the design and legal advisers before payment commitments depend on a particular interpretation of the site.
Example: an unresolved bridge determines the purchase
A lot has an attractive terrace beyond a stream. The seller offers to build a simple bridge after receiving an advance and says no further review is needed because the work lies within the farm. The purchaser connects access, design and restrictions before committing. Assessment identifies channel occupation, hydraulic capacity, ground conditions and project permissions, together with rights over any third-party land. The bridge may change cost and feasibility even if the terrace appears suitable. This hypothetical example does not conclude that all bridges are prohibited or predict permission. It shows that an auxiliary work can become the purchase's main condition. Alternatives include investigating another entrance, changing the layout or waiting for a verifiable decision. The preliminary agreement should reflect the dependency with professional advice rather than turning a verbal promise of future work into certainty about use and construction. The budget also needs to include the complete crossing and its associated maintenance rather than merely the bridge structure quoted by a supplier.
Budget restrictions and conservation obligations
Restricted land should remain visible in the financial assessment. Depending on its framework, it may need conservation, management or maintenance while reducing project options. Request a drawing distinguishing total area, conditioned areas and assessed alternatives with clear assumptions. Do not convert the arithmetic remainder into certified buildable land. Obtain quotations for actual studies and solutions rather than promising a universal permission cost. For obligations in an environmental decision, identify holder, activity, duration, monitoring and compliance status. Ask what needs review when ownership or design changes. Restrictions may also affect access, utilities and future expansion, so the initial price should not be assessed alone. Reducing scale or retaining an area without intervention may be an option subject to the relevant assessment. Explain landscape value and legal limitations together so the purchaser understands what the budget can support. Keep confirmed obligations separate from design estimates and unresolved requirements when comparing the lot with alternatives that have different environmental conditions.
Keep an environmental file specific to the property
Assemble identified mapping, applicable instruments, responses, drawings and studies, stating what has been verified and what remains outstanding. If the purchase depends on permission, define the required result and its connection to payments with advice; filing alone does not establish feasibility. Afterwards check that executed works match the design and conditions actually approved. Preserve monitoring obligations and review changes before further interventions. When advertising a sale, avoid promising unrestricted use, privately owned water or construction beside a channel without sufficient evidence. This guide received editorial review on 14 October 2026 and provides national orientation. It delineates no protection zone and authorises no activity within a protected area. Conclusions for actual land depend on environmental and municipal instruments, competent authority and professional assessment of the project. The objective is to make protection part of the initial purchase decision rather than an unexpected procedure after payment. A future purchaser should be able to understand the site's restrictions and documented interventions from the retained file.
Channel, riparian-area and intervention worksheet
This worksheet starts with source, scale and location; it does not measure a universal strip from visible water. Describe the actual intervention and keep municipal and environmental enquiries separate.
| Review question | Evidence to record | Next action |
|---|---|---|
| Which water feature appears, and where? | Plan, coordinates, photographs, seasonal observations and source identifying a channel, spring or other feature. | Have observations connected to mapping and records; a dry-weather visit does not define the whole system. |
| Is there a delimitation or riparian-area information? | Decision, study, mapping, date, scale and scope of the source consulted for this section. | Confirm applicable information and missing precision with the authority before drawing the final siting plan. |
| Which work would occupy or alter the channel? | Crossing, discharge, pipe, fill or other intervention, with proposed dimensions, method and affected area. | Enquire about the relevant environmental procedure using that design; small size does not settle its treatment. |
| Which other constraints affect the land? | Protected areas, protected land, risk and planning or environmental records relating to the property. | Review compatibility of the complete proposal and flag outstanding layers; one favourable enquiry does not settle all. |
| Who should answer each outstanding question? | Municipality, competent environmental authority, provider and professional, with specific questions and submitted records. | Retain responses and conditions separately; adjust location or scope before carrying out unresolved interventions. |
Sources & bibliography
Read the full document, its date, amendments and scope. The editorial review date describes this page; it does not establish an authorisation or a specific answer about your plot or financing.
- 01Decreto 2811 de 1974 · art. 83; cauces, lechos y bienes asociados al aguacancilleria.gov.co · National
- 02Decreto 1076 de 2015 · arts. 2.2.3.2.3A.1-3A.4 y 2.2.3.2.12.1; rondas y ocupación de caucecancilleria.gov.co · National
- 03Ley 388 de 1997 · arts. 10 y 35; determinantes y suelo de proteccióncancilleria.gov.co · National
- 04Ley 99 de 1993 · arts. 31 y 66; competencias ambientales según jurisdiccióncancilleria.gov.co · National