Hey, I am Matt, architect and cofounder of Studio Octava. After years of designing and building homes across Costa Rica, I get one question again and again: where should I spend more, and where can I safely spend less?
In a tropical climate like ours, a few early choices make the difference between a home that thrives and a home that constantly needs repair. Below is my practical guide on where to splurge and where to save when you are building a home in Costa Rica.
1. Roofing and Waterproofing
If you remember one thing, let it be this: the roof is everything in Costa Rica. Heavy rain, high humidity, and strong sun will expose any weakness fast. A great roof keeps the house dry, quiet, and comfortable for decades.
- Galvalume or standing seam metal roofs resist corrosion far better than standard sheets and last longer.
- Extended eaves of at least 90 cm protect walls, windows, and doors from constant rain exposure and reduce heat gain.
- High quality waterproof membranes are essential under flat or low pitch roofs. This is not the place to cut costs.
- Sandwich panels are excellent for thermal insulation and for reducing the sound of rain. They are widely available in Costa Rica. Architects sometimes skip them to save on budget, but at Studio Octava we treat sandwich panels as a standard because they improve comfort and durability. If budgets are tight, quality can be adjusted later, but do not start with lower measures.
Investing here means fewer leaks, fewer mold issues, and a much calmer home during rainy nights.
2. Windows and Doors
Humidity, salt air, and insects test every opening in a tropical home. The right window and door system makes your home quiet, secure, and low maintenance.
- PVC or powder coated aluminum frames perform very well in this climate. PVC is not the most typical choice for the tropics, but it seals extremely well, which is great when you need to contain noise from outside.
- Impact resistant or laminated glass is smart in high wind or coastal areas.
- Local tip: we often work with Vidrio Tico in Pérez Zeledón. The name sounds very Tico and we love that, and they are genuinely professional with excellent sealing and installation quality.
Good openings protect against moisture and reduce maintenance, all while improving comfort and acoustics.
3. Plumbing and Drainage
You do not see it once the house is finished, but this is where many problems begin. Bad drainage and undersized lines cause flooding, settlement issues, and endless repairs.
- Plan site drainage early. Use French drains, gravel beds, swales, and correct grading that moves water away from the building.
- Use larger diameter storm lines. For tropical downpours, a minimum of 4 inches for stormwater is a smart baseline.
- Avoid cheap PVC fittings that become brittle with heat and UV.
- Use PEX for interior water lines. PEX is flexible, durable, and more resistant to leaks and pressure changes than rigid PVC. It does not corrode, it handles our humidity well, and it simplifies clean routing through walls and ceilings.
Once buried, plumbing is expensive to fix. Do it right from the start and you will likely never think about it again.
The golden rule
Splurge on structure, waterproofing, and drainage. These are hard and expensive to fix later.
Save on cosmetics. Finishes, furniture, and decor can evolve with time and budget without risking the health of the building.
Pro tip from the field
If you are building near the coast, use stainless steel screws, bolts, and hinges everywhere. Standard hardware can begin to rust within months, even in covered areas. Small details like this keep walls clean and extend the life of doors, cabinetry, and decks.
Final thoughts
Building in Costa Rica is not about choosing the most expensive option. It is about choosing the right option for a demanding climate. When your roof, openings, and drainage are handled with care, your home stays dry, cool, and easy to live in. That is our approach at Studio Octava: spend wisely on what protects the building, then express your style with finishes over time.
If you want a partner who understands design and construction realities in the tropics, take a look at our work at studiooctava.com. What would you personally splurge or save on If you have your own experience, I would love to hear it.
