Costa Lanta — Concrete Cabanas That Fold Open to the Sea at the Quiet End of Klong Dao
If you've ever seen photos of a room where heavy timber walls fold fully open until almost nothing stands between the bed and the garden and wondered where it was — the answer is usually Costa Lanta. This adults-only resort sits at the northern end of Klong Dao Beach on Koh Lanta, where Thai architect Duangrit Bunnag laid out 33 polished-concrete cabanas across a tropical garden. What guests come back to mention most is the stillness under the casuarina pines and a minimalist design that, more than twenty years on, still reads as contemporary — with the honest caveat that its charm now comes with visible wear you'll need to accept.
Costa Lanta is the work of Duangrit Bunnag, one of Thailand's leading contemporary architects. The brief was the "simplicity of island life" — and rather than lining rooms up in rows, the 33 rooms in a polished-concrete cabana style are scattered across 12 acres of garden, separated by natural waterways and linked by timber walkways. The defining feature of each room is the pair of heavy timber walls that slide fully open, turning a closed bedroom into an open pavilion catching the sea breeze in a matter of seconds. It's the detail guests describe more than any other.
There are only a handful of room categories, and every one is larger than you'd expect from an island resort. The Deluxe Cabana runs 53 sqm with a private terrace and a semi-open bathroom with a rain shower, while the Superior rooms and Garden View Suite step up to 63 sqm. Inside you get smooth polished-concrete floors, a low platform bed, and a white mosquito net draped from the ceiling like a folded sail — closer to a piece of art than insect protection. Each cabana comes stocked with a beach basket, umbrella, flashlight, and bottled water set out at turndown.
"You fold the walls open in the morning, listen to the surf and the wind in the pines, sip coffee from the bed — and you understand exactly why people travel all the way to the far end of the beach."
The common areas sit in a tall, open concrete pavilion right by the sand, with two restaurants and a lounge bar built around a long bare-concrete counter that has become something of a signature. Breakfast is made to order each morning. This is where Duangrit Bunnag's design reads clearest — concrete, timber, and the open sea straight ahead. The outdoor pool sits in the garden, and for anyone wanting to slow down there's a spa offering Thai massage, aromatherapy, and reflexology.
The location is at the far northern end of Klong Dao Beach, one of the longest and calmest stretches of sand on Koh Lanta — a few steps from your cabana to the water. It's about a 5-minute drive from Sala Dan Pier, handy when you arrive by ferry, and the shops and restaurants of Sala Dan town are close enough to reach on the bicycles the resort lends out for free. The trade-off for this quiet end of the beach is that getting further afield means renting a scooter or calling a taxi.
The Trip.com score sits at 8.2/10 from 9 reviews, with sub-scores clustered at 8.2–8.3 across cleanliness, location, amenities, and service. The honest point to make is that the resort has been open a long time and the wear is starting to show. Some reviews praise the design and the warm service; others note rooms that look more tired than the rate suggests. The semi-open bathrooms look striking but run humid in the rainy season — worth knowing before you book rather than after.
On price, the Deluxe Cabana starts around ฿4,400/night in low season (May–October), rising to roughly ฿6,900–8,000 over the late-December-to-February high season. That's reasonable for a 53 sqm beachfront room with this level of design. Being adults-only, it suits couples and travellers who want quiet far more than families with young children.
The bottom line: Costa Lanta works best for travellers who value design and a quiet beach setting over a brand-new room. If you like bare-concrete architecture, a minimalist look, and can live with the signs of a resort's age, it offers something you won't easily find elsewhere on Koh Lanta. But if you expect a 4-star resort where everything feels freshly opened, weigh the recent reviews carefully before you commit.
Summary from Booking & Agoda
- ✓ Fold-open cabana design unlike anywhere else on the island
- ✓ Quiet northern end of Klong Dao Beach, steps from the sand
- ✓ Spacious rooms at 53–63 sqm with private terraces
- ✓ Friendly staff and warm, easygoing service
- ! Resort has been open a long time — some rooms show wear
- ! Semi-open bathrooms run humid in the rainy season
- ! Quiet end of the beach — you'll want a scooter to range further
- ✓ Minimalist concrete architecture by Duangrit Bunnag
- ✓ Cabanas dispersed across 12 acres for genuine privacy
- ✓ Adults-only and quiet — well suited to couples
- ✓ Long white-sand Klong Dao Beach with shallow water for walking
- ! Rooms feel less fresh than newer resorts in the same bracket
- ! High-season rates climb noticeably
- ! No young children (adults only)
- 💡If room freshness matters to you — check the most recent review photos and ask for a refurbished cabana when booking → some cabanas show their age more clearly than others
- 💡If you're travelling in the rainy season (May–October) — the semi-open bathrooms and fold-open walls are stunning in the dry months but humid when it rains → plan around it, though low-season rates are roughly half
- 💡If you want to explore the island often — the far end of the beach is very quiet; the free bicycles reach Sala Dan, but other beaches need a scooter → budget for transport