Our environmental impact study documented 153 plant species on the El Jamito hillside. Here's what a biodiverse Samaná site actually holds — and why a flora inventory matters before anyone breaks ground.
Our environmental impact study (EsIA) documented 153 plant species on the El Jamito hillside above Las Terrenas. That number is the answer to a question most buyers never ask before they build: what is actually living on this land? Biodiversity is the full variety of life in a place — the trees, the shrubs, the vines, the soil organisms, and the animals that depend on all of them. It matters because a hillside with 153 documented plant species holds together in ways a cleared, replanted lot never quite recovers.
What You Need to Know
- Our EsIA (environmental impact study) recorded 153 plant species across the 70-acre El Jamito site.
- Biodiversity is the variety of living things in an ecosystem; it drives soil stability, water retention, and habitat — all critical on a Samaná slope.
- A flora inventory is a legal requirement of the Dominican environmental licensing process, not a marketing add-on.
- Our environmental license, 0644-26, carries 57 binding obligations that govern how we build around what the inventory found.
- Tropical fruit trees on site — mango, avocado, guava, and cacao among them — are kept, not cleared, wherever the build allows.
What Is a Flora Inventory, and Why Does Every Build Need One?
A flora inventory is a documented count of the plant species growing on a site before construction begins. In the Dominican Republic, it isn't optional — it's part of the environmental impact study (EsIA) that MIMARENA, the environment ministry, requires before issuing a license.
Think of it as a census for plants. A team of botanists walks the land, identifies what grows there, notes rare or protected species, and maps where they sit. The result becomes the baseline against which everything is measured: what gets preserved, what gets relocated, and what a developer is legally bound to protect.
Our inventory produced 153 species across 70 acres (29 hectares) of hillside at 150–300 metres elevation. That's not an abstract figure. It's the reason our building guidelines put villas on columns on sloped terrain and route paths around mature trees rather than through them.
An inventory is only worth the number if you build around what it found. The 153 species on our EsIA are a set of obligations, not a brochure line — this is a Sienna perspective, and we publish the count so readers can hold us to it.
What Is Biodiversity and Why Is It Important on a Hillside?
Biodiversity is the range of different living organisms in an ecosystem, and on a tropical slope it does concrete, load-bearing work. Root systems from diverse species knit the soil together at different depths — deep taproots anchor, shallow fibrous roots bind the surface. Strip that variety out and the hill loses its grip.
The stability problem a monoculture can't solve
Clear a Samaná hillside and replant it with lawn and a few ornamentals, and you've traded a 153-species root network for a shallow one. Heavy rain then moves soil instead of soaking into it. The Caribbean sits inside a recognised biodiversity hotspot, which means the region packs unusually high species richness into a small area — and losing it locally is harder to reverse than people expect.
Why this shapes how we build
This is why our project documents call for villas on slopes to be built on columns, preserving the topography, the root systems, and the natural drainage underneath. It's more expensive than cut-and-fill grading. We do it because the inventory told us what was there to protect. If you want the engineering detail, we cover it in our guide to column foundations that preserve roots and drainage.
Which Tropical Fruit Trees Grow on the Site?
The El Jamito inventory includes a working larder of tropical fruit trees — the same species that have fed the Samaná peninsula for generations. Rather than clear them, our building guidelines keep productive trees wherever a villa footprint allows.
Among the fruit-bearing species commonly found on Samaná hillsides like ours:
- Mango — dozens of local varieties fruit through the summer months
- Avocado — large-fruited Caribbean types, heavy croppers
- Guava — hardy, fast-growing, favoured by birds
- Cacao — Samaná is cacao country; the peninsula's shaded slopes suit it
- Coconut — the palm that defines the coastline just below
- Soursop (guanábana) and passion fruit — understory and vine crops
A retiree weighing a hillside lot often pictures a blank canvas. The reality is closer to inheriting a mature orchard — one that fruits on a Samaná calendar you learn season by season. We map that calendar in what grows in Samaná month by month, and the same species anchor our collaborative farming plots.
These trees aren't decoration. A productive canopy is biodiversity that pays you back in harvest, shade, and habitat.
What Do the 57 Environmental Obligations Actually Require?
Our environmental license, 0644-26, comes with 57 binding obligations — enforceable conditions attached to permission to build. The flora inventory is upstream of most of them.
From inventory to obligation
The 153-species count doesn't sit in a drawer. It feeds directly into rules about which trees stay, how slopes are treated, and how the site drains. Several obligations govern vegetation retention and erosion control specifically because the inventory established what the baseline was.
Rules you can see on the ground
Some obligations show up as visible design constraints. Roofs must be flat or low-slope, with aluminum roofing banned and green roofs encouraged. White exterior walls aren't permitted — earth-tone palettes blend the built form into the vegetation the inventory recorded. Even roof-mounted solar is height-capped at 40 cm so panels don't break the treeline silhouette.
The Dominican framework for all of this sits under environmental Law 64-00 and the CONFOTUR tourism-incentive law, Law 158-01, which pairs the tax exemptions with a sustainable-development mandate. You can read the general foundation in our Law 158-01 CONFOTUR explainer. For destination context on why the region draws this kind of scrutiny, National Geographic's coverage documents the Caribbean's status as one of the planet's most biodiverse island regions, per its long-running biodiversity and nature reporting.
How Does a Flora Inventory Protect Your Investment?
A documented inventory isn't only an environmental instrument — it's due diligence that protects the buyer. It tells you the land you're buying was studied, licensed, and is being built on within a legal framework rather than cleared on a bulldozer's whim.
The stewardship-value link
Land that keeps its mature trees, its drainage, and its species diversity holds value differently than a stripped lot. Buyers who care about biodiversity — and the high-net-worth buyers driving 2026 demand increasingly do — pay attention to whether a development documented what it found. Savills research on prime residential markets notes that sustainability credentials now factor into how global buyers weigh property, per its ongoing global residential analysis.
A composite buyer's calculation
Picture a Munich software consultant comparing two hillside lots. One developer can hand over a 153-species EsIA, a license number, and 57 obligations. The other offers a rendering. For a detail-oriented buyer, the paper trail is the reassurance — it means the slope beneath the villa won't quietly erode in five years.
For a buyer who values land stewardship, the flora inventory is the single most honest document a developer can show you. Numbers, species names, and a license reference are harder to fake than a sunset photo. — a Sienna in-house view
If land stewardship is central to your search, our investment self-assessment helps map your priorities to the right kind of development before you tour anything.
How We Apply This at Sienna
At Sienna, the 153-species inventory is the spine of the build — not a line in a brochure. The EsIA that produced it underpins our license, 0644-26, and its 57 obligations shape everything from foundations to roof colour.
In practice, that means villas on columns on slopes to preserve the root systems and drainage the inventory recorded; individual septic treatment at each villa so wastewater never concentrates on the hillside; earth-tone walls and height-capped solar so the built form recedes into the vegetation; and productive fruit trees kept wherever a footprint allows. Our collaborative farming plots draw on the same species the botanists logged. Across the 70 acres, more than 90% of lots keep their ocean views precisely because the land wasn't flattened to force them.
We publish the number because we think buyers who care about biodiversity deserve specifics, not adjectives. If you want to see how the inventory translates into design, our eco villas built to work with the land and our broader sustainability commitment across Samaná go deeper.
Frequently Asked Questions
What is a flora inventory in the Dominican Republic?
It's a documented count and mapping of the plant species growing on a site, produced as part of the environmental impact study (EsIA) that MIMARENA requires before issuing a construction license. Our El Jamito inventory recorded 153 plant species.
Why does biodiversity matter for building on a slope?
Diverse root systems anchor soil at different depths, hold slopes together, and manage drainage. Replacing 153 species with a shallow monoculture increases erosion risk — which is why our villas on slopes are built on columns rather than graded flat.
Which tropical fruit trees are found at El Jamito?
Mango, avocado, guava, cacao, coconut, soursop, and passion fruit are among the species common to Samaná hillsides like ours. Our building guidelines retain productive trees wherever a villa footprint allows.
What is the difference between the inventory and the environmental license?
The inventory is the data — what grows on site. The license (0644-26) is the permission to build, carrying 57 binding obligations. The inventory feeds the obligations that govern vegetation retention, slope treatment, and drainage.
Does keeping mature trees affect resale value?
Land that retains its trees, drainage, and species diversity tends to hold value better than a stripped lot, and sustainability documentation increasingly matters to buyers. A documented inventory is part of the due diligence a careful buyer looks for.
The Number That Matters Most
A hillside is worth more standing than scraped. The 153 plant species in our EsIA, the 57 obligations on license 0644-26, and the fruit trees we build around are the specifics behind a claim any developer can make in words. Reading a real flora inventory is how you tell stewardship from a sales pitch.
If land stewardship shapes how you think about a second home, start with our investment assessment to clarify your priorities, or explore how the inventory becomes architecture in our eco villa design guide. No pressure — just the specifics.
Have questions about this?
Talk to our sales team directly — we'll answer on WhatsApp or by phone.
Written by
Sienna Terrenas Editorial Team
The Sienna Terrenas editorial team covers buying, owning, and living in Las Terrenas, Dominican Republic — from the purchase process and CONFOTUR tax strategy to villa construction and Caribbean community life, drawing on the team's on-the-ground experience in the area. Meet the Sienna Terrenas team.
