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3D model of a hillside home designed by our architect

Custom home builder at Lake Arenal

At Lake Arenal, the first thing to check is where the lot sits relative to the water, because land below the 550 m level was expropriated for the dam and the shore of this State-built reservoir carries a 50 m protection zone.

Minimum construction budget $350,000 USD, before land

Building a custom home at Lake Arenal today

Lake Arenal is Costa Rica's largest lake, about 85 km² and 30 km long, created in the late 1970s when the Sangregado Dam roughly tripled the original lake. Most of the shore lies in the canton of Tilarán, Guanacaste, with Nuevo Arenal on the north shore and the town of Tilarán about 5 km south of the water.

Nuevo Arenal was founded in 1978 to resettle the families whose village was flooded by the reservoir. The lake level moves a lot: ICE reported 534 m in April 2024 and 546.93 m in January 2025, its highest since 2005. That is why we survey any lakeside lot carefully before you buy.

Lake Arenal and its forested shoreline under a cloudy sky in Costa Rica.
Lake Arenal and its forested shoreline under a cloudy sky in Costa Rica. Photo: Grez, CC BY-SA 3.0, via Wikimedia Commons.
Municipality
Municipalidad de Tilarán, Guanacaste province
Main towns
Nuevo Arenal on the north shore, Tronadora, and Tilarán about 5 km south
From Liberia (LIR)
Roughly 1.5 to 3 hours by road to Nuevo Arenal, depending on route and conditions
The lake
About 85 km², a reservoir formed by the Sangregado Dam (1979)
Wind
Strongest December to February, often above 20 knots
Maritime zone
None, the lake is inland; a lakeshore protection zone applies instead

Getting to Lake Arenal

Nuevo Arenal is on the north shore of Lake Arenal, on the paved lakeside road between Tilarán and La Fortuna, about an hour from La Fortuna. Liberia's international airport (LIR) is roughly 1.5 to 3 hours away by road and San José about 3.5 hours.

As a custom home builder in Costa Rica, we build here from our showroom in Altos de Flamingo, with our crews on site for the length of your project. You can visit any time by appointment.

Land and lots around Lake Arenal

  • The land

    The country around the lake is rolling pasture mixed with primary and secondary forest. Listings around Nuevo Arenal, Tronadora and Santa Rosa range from lake-view building lots and gated-community parcels to farms of several acres, many on hillsides that look over the water toward Arenal Volcano.

    Land below the 550 m level was expropriated when the dam was built, and the Forestry Law sets a 50 m protection zone along the shores of reservoirs built by the State. Streams add their own strips (15 m in rural areas on flat land, 50 m on broken terrain) and springs a 100 m radius. A listing that says lakefront needs a survey checked against all three.

    Tilarán is preparing a canton-wide land-use plan with the National University's Progot program, which it started in 2021 with Cañas and Bagaces; plans go through SETENA and INVU review before the council adopts them. Through our land and construction consulting we confirm the rules that apply to your lot before you buy. The consulting fee is credited to the build if you go ahead; surveys and soil studies are paid separately and are not credited.

  • Water, wind and rain at Lake Arenal

    Living next to a large lake does not mean a lot has drinking water. Supply depends on the local system serving each community, and some rural properties rely on their own wells. We confirm a water availability letter, or the legal status of any well, in writing before purchase.

    From December to February the trade winds funnel over the lake and often blow above 20 knots, with cold fronts bringing about 30 knots for 4 to 5 days at a time. The area is also wet: ICE said December 2024 was one of the rainiest months at the reservoir since records began in 1958. We design roofs and openings for wind on exposed ridges, sheltered terraces and drainage for heavy rain.

Permit checklist for Lake Arenal

Not sure a lot will get a permit and a water letter? Our land consulting checks it before you buy, and the consulting fee (not surveys or soil studies) is credited to your build if you go ahead with us.

  • Building permit from the Municipalidad de Tilarán
  • Survey plan checked against the ICE reservoir land and the 50 m lakeshore protection zone
  • Stream and spring protection strips under Article 33 of the Forestry Law
  • Zoning confirmed with the municipality while Tilarán's land-use plan is in progress
  • Water availability letter, or the legal status of any well, in writing
  • Structural design for wind loads on exposed hillside sites

Why build at Lake Arenal

  • Lake and volcano views

    Hillside lots look across Costa Rica's largest lake, and on clear days toward Arenal Volcano at its eastern end.

  • Wind and water sports

    From November to April the western end gets strong, dependable winds, and the lake is known as one of the world's top windsurfing and kitesurfing spots.

  • Between Guanacaste and La Fortuna

    Nuevo Arenal is about an hour by road from La Fortuna, Liberia airport (LIR) is within driving range, and San José is about 3.5 hours away.

La Fortuna sits at the eastern end of the lake below the volcano, and Liberia is the nearest international airport for owners flying in. La Fortuna Liberia Guanacaste Land and construction consulting

Sources: Wikipedia: Lake Arenal; Wikipedia: Nuevo Arenal; Ley Forestal 7575 (Articles 19 and 33); Delfino: Embalse Arenal alcanza nivel histórico (Jan 2025); Delfino: Tilarán, Cañas y Bagaces avanzan en sus planes de ordenamiento territorial (Feb 2025); Tico Wind: Lake Arenal wind statistics.

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“We have had a great experience with Decentra. Their follow up skills are impeccable and they are a one stop shop for all phases of your build.”

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“I engaged with Sean and the owner Sergio to obtain building costs for a residential project I was considering in the mountains of the Central Valley. I found them to be very welcoming, informative, accommodating…”

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Questions about building at Lake Arenal

Can I build right on the shore of Lake Arenal?

Usually not right at the water. Land below the 550 m level was expropriated for the dam, and the Forestry Law protects a 50 m zone along the shores of State-built reservoirs. The level also moves by several metres between dry and wet years, so we check the survey against both lines before you buy.

How windy is Lake Arenal for a home?

Very windy in the dry season. From December to February the wind often blows above 20 knots, and cold fronts can bring about 30 knots for several days. We design roofs, windows and terraces for those loads, especially on exposed ridges.

Who issues building permits around Nuevo Arenal and Tilarán?

The Municipalidad de Tilarán, which covers most of the lake. The canton is preparing a land-use plan, so we confirm the zoning that applies to your lot with the municipality early in the process.

How much does it cost to build a custom home at Lake Arenal?

It depends on the lot, the slope, the construction system and the finishes. Our minimum construction budget is $350,000, before land, and we price each home once we have seen the site and the design.

Tell us about your project

The fastest way to reach us is WhatsApp. Or send the form and we reply within one business day.

Minimum construction budget $350,000 USD, before land

Showroom
Altos de Flamingo, Playa Flamingo, Guanacaste, Costa Rica, by appointment
Licensing
CFIA certified under SIM SRL

Minimum construction budget: $350,000 USD, before land. We reply within one business day.

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