Where we work(South Pacific)
Architects in Dominical
Dominical is in the canton of Osa, Puntarenas, 13 m above sea level. A year here brings 3,765 mm of rain, 97% of it from April to December. Permits for a lot go through the Municipalidad de Osa.
We design houses, rental villas and small hotels in Dominical and anywhere else in Costa Rica, from the first site visit to the CFIA permit.
(At a glance)
- Canton
- Osa, Puntarenas
- Permits
- Municipalidad de Osa
- Elevation
- 13 m
- Rain
- 3,765 mm a year
- Dry season
- January to March
- Liberia airport
- 5 h 35 min by road, 302 km
- San José airport
- 3 h 40 min by road, 190 km
- Sunlight
- 1,993 kWh/m² a year
- Solar power
- 1,596 kWh a year per kW of panels
(The year)
The dry season runs from January to March: 3 months under 60 mm of rain. The wettest month is October, with 719 mm.
Afternoons are hottest in March, at 29 °C on average, and coolest in October, at 27 °C. Nights stay between 21 and 23 °C.
Best time to start*
The best time to start building here is from November to March. Those 5 months bring 637 mm of rain in total; the other 7 bring 3,128 mm, 5 times as much.
Earthworks, foundations and concrete pours need dry ground, and many roads to the lots only stay passable without rain. On a day with 10 mm of rain or more, that work usually stops.
A 4-month phase of earthworks, foundations and structure that starts in November meets about 16 such days here; the same phase started in April meets about 30. Starting in November saves about 14 days of stopped work: some 2 weeks of crew and machinery paid to wait, and the pumping and drainage that wet excavations need. So the permit should be ready by October. Still, it is a recommendation, not a rule: building goes on through the rains, more slowly, and no project should sit for months waiting for the dry season.
(The wind)
Up to 7 km/h7 to 1414 to 2222 to 29Over 29
In the dry season the afternoon wind at Paso Canoas comes from the southwest.
Rooms that open to the wind on one side and away from it on the other cool themselves, and a roof that sheds the rain lets them stay open in the wet months too.
(Wind and sun)
(The sun)
Each dot is the sun at a whole hour, every three days: each figure-eight is one hour across the year, and the lines are the 21st of each month. Orange and red dots are the hours when the sun should stay off the glass.
The sun here is never far from overhead. At noon it stands 80° high in March and September and 57° in December, and from April 15 to August 30 it passes north of overhead, so walls and glass that face north take sun as well.
What heats a house is the low afternoon sun. It sets at 294°, west-northwest, in June and at 246°, west-southwest, in December. That side needs the deepest roof.
Sunrise falls between 5:14 and 5:57 all year, and sunset between 17:12 and 17:60.
The ground here gets 1,993 kWh of sunlight per m² a year, and solar panels make about 1,596 kWh a year for each kW installed.
(Building here)
A house of 300 to 500 m² to start with: change the project and the route redraws.
Within 200 m of the ordinary high-tide line the maritime zone law (Ley 6043) applies: the first 50 m are public and cannot be built on, and the next 150 m are held under a concession from the municipality, not owned. Check where a lot sits before you buy.
(Our work)
(Questions)
When is the best time to start building in Dominical?
Ideally from November to March, so that the earthworks, foundations and structure fall in the dry season. A 4-month phase of that work started in November loses about 16 days to heavy rain, against about 30 if it starts in April, about 14 days of crew and machinery. It is a recommendation, not a rule: building goes on through the rains, more slowly, and no project should sit for months waiting for the dry season. To start then, have the permit ready by October.
Who issues building permits in Dominical?
The Municipalidad de Osa. The drawings are filed first with the CFIA, through its APC platform, and the permit comes after the land use certificate and the water availability letter.
Can I build near the beach in Dominical?
Not in the first 50 m from the ordinary high-tide line, which are public. The next 150 m are held under a concession from the municipality rather than owned, with their own rules. Beyond 200 m, a titled lot follows the normal permit process.
How hot does it get in Dominical?
Afternoons average 29 °C in March, the hottest month, and 27 °C in October. Nights stay between 21 and 23 °C. Shade on the west side and air moving through the rooms do more for comfort than anything else.
How far is Dominical from the airports?
By road, without traffic, 5 h 35 min from Daniel Oduber airport in Liberia (302 km) and 3 h 40 min from Juan Santamaría airport in San José (190 km).
Rain: CHIRPS climatology (CHPclim v2, Climate Hazards Center, UC Santa Barbara). Temperature and wind: measured at Paso Canoas, 48 km away, typical year 2011 to 2025 (Climate.OneBuilding.org TMYx, from NOAA observations), temperatures adjusted for elevation. Heavy-rain days: NASA POWER (MERRA-2), 2001 to 2020. Sun: calculated for the town's coordinates. Elevation: SRTM. Roads and places: OpenStreetMap. Gathered October 2026.