SETENA in Costa Rica: when a house or development needs environmental viability
Under Decree 43898, a Costa Rica home under 1,000 m² of construction usually needs no SETENA environmental viability, unless it sits in a fragile area or is an Annex 1 activity.
SETENA (Secretaría Técnica Nacional Ambiental) is the MINAE agency that grants environmental viability (viabilidad ambiental) to projects in Costa Rica. Under the current regulation, Executive Decree 43898, a custom home with less than 1,000 m² of construction generally does not need it, unless the activity is listed in the decree's Annex 1 or the home is 500 to 1,000 m² inside an environmentally fragile area, which calls for the short D1-C form. Larger homes, earthworks above set volumes and most developments go through the D1 form.
This guide explains what SETENA does, the rules in force since 2023, when a house or a development needs viability, which form applies, how protected areas and the maritime zone change the picture, the official timelines and how it all fits with your municipal building permit. It is general information, not legal advice: confirm your project with SETENA, a registered environmental consultant or a Costa Rican lawyer.
What is SETENA in Costa Rica?
SETENA was created by the Organic Environmental Law, Ley Orgánica del Ambiente 7554 of November 13, 1995, as part of the Ministry of Environment and Energy (MINAE). Its job is environmental impact evaluation: it reviews projects that can affect the environment, issues or denies environmental viability, and follows up on the conditions it sets (SETENA). Article 17 of that law makes the evaluation a requirement before works or projects begin.
Files are now handled on SETENA's digital platform (tramites.setena.go.cr), after the agency moved from paper to a fully digital process (Delfino, October 2025). Environmental consultants who prepare the filings must be registered with SETENA.
The SETENA rules changed in 2023
Many guides still describe the old system. The current regulation is Executive Decree 43898-MINAE-S-MOPT-MAG-MEIC, the Reglamento de Evaluación, Control y Seguimiento Ambiental. It was published in La Gaceta No. 67 on April 19, 2023, took effect on August 19, 2023, and repealed the 2004 regulation (Decree 31849) and Decree 34536 of 2008 (EY).
The main changes for builders:
- The old D1 and D2 split is gone. Under the old rules, applicants filed a D1 or a D2 form (La República, 2018). The current list of instruments has no D2. Projects now use the D1 in several variants, the D1-C, or a special form (SETENA FAQ).
- The construction threshold rose to 1,000 m². Projects with less than 1,000 m² of construction no longer need an evaluation (SETENA FAQ); the challengers of the reform describe this as a rise from 500 m² to 1,000 m² for low-impact projects (Semanario Universidad, September 2023).
- Low-impact activities left SETENA. When announcing the reform, the government said remodels, improvement and repair works and activities such as bakeries, cabinet shops and workshops would no longer need viability (Delfino, February 2023).
The 2023 reform was challenged. In September 2023 the Constitutional Chamber admitted an action seeking to annul several articles of Decree 43898 and its Annex 2 (Semanario Universidad, September 2023). We did not find a published ruling on that action, and a 2024 bill proposed replacing SETENA with a new authority and moving many evaluations to municipalities (Semanario Universidad, August 2024). Before you file, check with SETENA or your consultant that the thresholds below are still the ones in force.
Does a single-family home need SETENA environmental viability?
Usually not. SETENA's own FAQ states that activities, works or projects with less than 1,000 m² of construction do not require an environmental impact evaluation, unless the activity is listed in Annex 1. The exemption does not free you from other permits: the project stays under municipal control and the rules of agencies such as the Ministerio de Salud and MINAE.
| Your project | What SETENA requires |
|---|---|
| Construction under 1,000 m², outside a fragile area, not an Annex 1 activity | No environmental evaluation; follow municipal rules and the Code of Good Environmental Practices where it applies |
| Construction of 500 to 1,000 m² inside an environmentally fragile area | D1-C form |
| Construction over 1,000 m² | D1 form, with the instrument set by the impact score |
| Earthworks of 1,000 m³ or less, not part of the first stage of a project | No environmental evaluation |
| Earthworks of 500 to 1,000 m³ inside a fragile area | D1-C form |
| Earthworks over 1,000 m³ | D1 form |
Source: SETENA FAQ, based on Decree 43898. For low-impact (Category C) activities outside fragile areas, municipalities are responsible for requiring the Code of Good Environmental Practices, Decree 32079.
Three things can push a house into SETENA even when the building is modest:
- Location in a fragile area. Fragile areas are defined in Article 98 of the decree. Being in one does not ban a project, but it means the design must address the site's technical limits (SETENA FAQ).
- Hillside earthworks. Cut and fill for a view lot, a driveway and a pool pad can exceed the earthwork limits before the house itself does.
- Several buildings or units. A main house, a guest house, staff quarters and a pool deck may be counted together. How SETENA counts the area of your specific project is something to check with SETENA or your consultant.
Settle this before you design. Our land and construction consulting, with a CFIA-licensed engineer and architect with 15 years of experience, can review the lot and the planned design so you can ask SETENA or a consultant early whether a filing is needed.
When does a development need environmental viability?
Subdivisions, condominiums, multi-unit projects, hotels and larger estates usually exceed the 1,000 m² construction threshold or fall into Annex 1, which lists activities by economic activity code. We have not confirmed the Annex 1 thresholds for each type of residential development, so check them with SETENA or your consultant for your project. Two special routes exist: the D6 form for residential, commercial and service projects in sites classified as urban quadrants, and the D3 priority route for state projects and social interest housing (SETENA FAQ).
If you are planning a development, a development feasibility study is the place to put environmental review into the schedule and budget from the start.
SETENA forms and categories: D1, D1-C and the impact score
For a D1, the consultant scores the project in an Environmental Impact Significance matrix (SIA). The score decides which instrument goes with the form (SETENA FAQ):
| Instrument | When it applies | Official review time |
|---|---|---|
| D1 + DJCA (sworn statement of environmental commitments) | SIA score of 330 or less | Up to 14 natural days |
| D1 + PGA (environmental management plan) | SIA score above 330 and below 660 | Up to 21 natural days |
| D1 + EsIA (full environmental impact study) | SIA score of 660 or more | Up to 28 natural days |
| D1-C | Low-impact projects in the Category C range located in fragile areas | Up to 7 natural days in total (Decree 43898, Art. 33) |
The decree sorts projects into categories A (high impact), B1 (moderate to high), B2 (moderate to low), C (low) and D (very low). Other forms cover telecommunications towers (D1-Torres), logging in protected wild areas (D4-Forestal) and urban quadrants (D6).
How long does SETENA take?
The review times in the table run from the moment the file meets all conditions, and the decree adds up to 7 days for the resolution after the technical report on a D1 (Decree 43898, Art. 12). If SETENA asks for more information, the applicant generally has at least 20 business days to answer, or 10 for a D1-C. The real schedule therefore depends mostly on preparing the studies and answering requests.
Fast is not always safe. SETENA approved the Vistas de Sámara project in the maritime zone in February 2024; opponents said the review took only 16 natural days, and in October 2024 SETENA annulled the viability and opened an investigation into how it had been granted (Delfino, November 2024). A careful, complete file protects your investment better than a quick one.
Validity, guarantee and the environmental bitácora
- Five years to start. Viability is valid for up to five years before the project begins. The clock stops once the environmental management stage opens: the guarantee is deposited, the digital bitácora is enabled and an environmental consultant is designated (SETENA FAQ).
- Concession projects. For projects that need a concession, the period starts when the concession is granted (Decree 43898, Art. 45).
- Guarantee. SETENA can require an environmental guarantee of up to 1% of the investment, which must be kept current (SETENA FAQ).
- Follow-up. A responsable ambiental registered with SETENA keeps the Bitácora Digital Ambiental and reports on compliance during construction.
- Fees. SETENA fees are set in its tariff table and paid in colones at the Central Bank rate on the deposit date. Check the current amount with SETENA.
Protected areas, rivers and forest
SETENA is not the only environmental filter. The Forestry Law sets protection areas of a 100 m radius around permanent springs, 15 m on each bank of rivers and streams in rural flat terrain (10 m in urban areas) and 50 m on broken terrain, and generally prohibits changing the use of forest land (CRIE, September 2026). These distances apply whether or not your project goes through SETENA.
Lots near wildlife refuges and national parks can also fall under local rules. In the buffer zone of the Ostional wildlife refuge near Nosara, for example, a regulation upheld by the Sala Primera in June 2026 limits building height to 9 m in the first kilometre, caps built area at 50% of each lot and requires wastewater treatment systems for new buildings (Delfino, June 2026). Plan wastewater with the design, not after it.
Building in the maritime zone
The maritime terrestrial zone is the 200 m strip measured from the ordinary high tide line: a 50 m public zone and a 150 m restricted zone. Land in the restricted zone is held by municipal concession, not ownership (CRIE, September 2026), for terms of 5 to 20 years, and foreigners must have lived in Costa Rica for at least five years to hold one (Tico Times, August 2026). Zoning plans (planes reguladores) must incorporate the environmental variable through a SETENA procedure (SETENA; Delfino, October 2025), so ask the municipality whether the regulatory plan that covers your beach is in force.
Whether your concession project needs its own viability depends on its size and location, so check with SETENA or your consultant. Remember that for concession projects the five-year validity starts when the concession is granted.
How SETENA fits with your municipal building permit
A typical custom home goes through the land-use certificate, due diligence, water and electricity availability, plans by CFIA-registered professionals filed through APC, the INS workers' insurance policy and then the municipal permit (Diario Extra, 2026). When a project needs viability, it belongs early in that chain, because the law requires the evaluation before works begin and the resolution can set conditions that change the design. Ask the municipality at which stage it wants the SETENA resolution or proof of exemption in the file.
If your project is exempt, keep the reasoning on file: the planned area, the earthwork volumes and why the lot is outside a fragile area. Read our guide to building a house on your own land for the rest of the process.
How Decentra Homes helps
Decentra Homes is a design-build custom home builder in Costa Rica, founded in 2020. Design and construction are CFIA certified under SANYC Ingeniería (CFIA registration CC-10880), with CFIA-licensed architect Sergio Cerceño. We handle the permit file through our permits and water letters service, and our consulting, with a CFIA-licensed engineer and architect with 15 years of experience, is $200 per hour if you want a lot or design reviewed before you commit. We have completed 50+ residential and commercial projects. Minimum construction budget $350,000 USD, before land. Message us on WhatsApp +506 8733-2930 or through our contact page.