From Water Tanks to a Warm Wooden Home on a Bangkok Rooftop

A Bangkok rooftop once used only for water tanks has been transformed into a warm and private wooden home by WARchitect.

High above the busy streets of Bangkok, a quietly remarkable home sits where few would expect it. Designed by WARchitect, this modern wood house was built on top of a five storey apartment building in the Lat Phrao district, transforming a once forgotten rooftop into a warm and welcoming home.

The owner had long used the rooftop for a purely practical purpose. It was home to water tanks and little else, leaving a large expanse of concrete unused. Rather than letting that space go to waste, he envisioned a small private house for himself, one that would sit above the city yet remain calm, simple, and hidden from view.

Set back from the edge, this rooftop house is completely hidden from public roads, preserving the apartment building below.

That idea came with challenges few residential projects face. This was not a plot of land with trees and gardens, but a concrete rooftop elevated more than 15 meters above street level. Surrounding greenery was replaced by the vertical outlines of neighboring high rise buildings. From the ground, only the front facade could ever be seen.

To prevent the new house from clashing visually with the apartment below, WARchitect set it back from the building edge. From public roads, the house is invisible, allowing the apartment block to retain its original presence while the rooftop home exists quietly above it.

Set back from the edge, this rooftop house is completely hidden from public roads, preserving the apartment building below.

One of the defining features of the house is the way the wood ceilings and walls flow continuously from inside to out. WARchitect treated the walls and roof as if they had no thickness, using subtle architectural techniques to create the illusion of a thin, floating surface. Drop ceilings and gentle slopes hide lighting, curtains, and air conditioning, making the space feel seamless and calm rather than technical.

An open plan living and dining space wrapped in wood and glass frames panoramic views of the surrounding city.

Throughout the home, material choices play a key role in its character. The architects used Balau wood planks that the owner already owned, embracing natural imperfections such as cracks, knots, saw marks, and variations in colour. Rather than hiding these details, WARchitect treated them as part of the wood’s natural charm.

An open plan living and dining space wrapped in wood and glass frames panoramic views of the surrounding city.

Inside, the home opens up into a light filled living and dining space wrapped in wood and glass. Large openings frame panoramic views of the surrounding cityscape, turning the skyline into a constantly shifting backdrop. Because the owner rarely hosts guests, the architects leaned into simplicity, designing a space that feels deliberately uncluttered and almost bare in its honesty.

An open plan living and dining space wrapped in wood and glass frames panoramic views of the surrounding city.
An open plan living and dining space wrapped in wood and glass frames panoramic views of the surrounding city.

The kitchen sits just off the dining area, fitted with floating wood cabinets that reinforce the sense of lightness throughout the home. From here, there is direct access to a small internal courtyard. This courtyard, complete with a tree, acts as the heart of the house and is visible from nearly every room, blurring the line between indoors and outdoors.

Floating wood cabinets define the kitchen, which opens directly onto a small courtyard with a tree at its centre.
Floating wood cabinets define the kitchen, which opens directly onto a small courtyard with a tree at its centre.

Sleeping spaces are tucked discreetly into the layout. One bedroom sits behind the television wall in the living room and is accessed through a pocket door. Inside, concealed lighting casts a soft, even glow across the wood surfaces, creating a relaxed and intimate atmosphere suited to rest.

An open plan living and dining space wrapped in wood and glass frames panoramic views of the surrounding city.
A discreet bedroom hidden behind the living room wall features soft concealed lighting and a pocket door.

Another bedroom opens directly onto the outdoor space through a sliding glass door. Outside, the hard concrete rooftop has been softened with a layer of pebbles, turning what was once a purely functional surface into an extension of the living environment.

Sliding glass doors connect the bedroom to an outdoor rooftop space finished with pebbles.
Sliding glass doors connect the bedroom to an outdoor rooftop space finished with pebbles.

The bathrooms introduce a subtle contrast. White accents break up the warmth of the wood, while a backlit mirror and a floor to ceiling window ensure the space remains bright and airy without losing its sense of privacy.

White accents, a backlit mirror, and a full height window bring light into the wood lined bathroom interior.
White accents, a backlit mirror, and a full height window bring light into the wood lined bathroom interior.

In a city defined by density and height, this rooftop home proves that privacy, simplicity, and warmth can still exist above it all.


Photography by Rungkit Charoenwat | Architect: WARchitect | Architect in Charge : Thawin Harnboonseth / Photsawat apariman