The Flatpack Collection
Welcome to Niwa, Koto’s most ambitious and versatile cabin collection, designed to meet the demands of today’s lifestyle and landscape. Rooted in our mission to connect people to nature, Niwa brings sophisticated, sustainable design to any location on Earth—from secluded mountain escapes to vibrant urban backdrops.
With Niwa, Koto sets a new standard in modular architecture. Our innovative flatpack cabins offer both beauty and functionality, delivered worldwide in easily assembled panels. Every detail of Niwa reflects our signature aesthetic and commitment to quality, making it an ideal choice for those who seek a blend of elegance, practicality, and sustainability.


The Niwa Difference
World-Class Design, Anywhere
Niwa cabins are crafted to meet the unique challenges of remote and hard-to-reach locations, allowing you to experience Koto’s design ethos wherever your imagination takes you.
Precision Flatpack Assembly
Shipped worldwide in containers, each Niwa cabin arrives as precision-engineered panels that can be erected on-site in just days, minimising environmental impact and maximizing accessibility.
Tailored to Your Needs
From compact saunas to expansive studios, the Niwa range can adapt to a variety of lifestyles and preferences, with modular options that enable multiple cabins to be combined for larger, connected spaces.


A Family of Configurations
Whether you’re seeking a quiet retreat, an artist’s studio, or a compact living space, Niwa’s versatile options make it possible. Choose from our range of thoughtfully designed configurations:
Small 2.5m x 2.5m Perfect for saunas or compact studios.
Medium 2.5m x 5m Ideal for studios, saunas, or single-room sleep cabins.
Large 5m x 5m Suitable for spacious studios or fully self-contained cabins.
Each cabin showcases Koto’s signature charred timber cladding, expansive glazing, and striking pitched roof. Built with sustainably sourced materials, Niwa cabins rest lightly on the land, preserving the beauty of their surroundings and offering airy, light-filled interiors.


SMALL - STUDIO
A small studio perfect for a private home office or a relaxing space in the garden.
SMALL SAUNA
The small sauna features an upper and lower bench, which can accomodate 2 people lying down, or seat 3-4 comfortably. Perfect for a private sauna in the garden.


MEDIUM STUDIO
The medium studio is perfect for a private home office, secluded creative space, or tranquil garden room. Equally, it is generous enough to be used as a yoga studio or workout space, offering generous light and connection to the outside.
MEDIUM SLEEP
Efficiently designed to meet the all the needs of a sleep cabin without compromising on luxury. Suitable for use as an additional dwelling or holiday let.
MEDIUM SAUNA The medium sauna has an upper and lower bench, which can comfortably accommodate 4-6 people. Featuring a enclosed changing area, the medium sauna is suitable for families and also hospitality retreats.


LARGE STUDIO
Offering generous internal space with large windows and natural light, the large studio is perfect to function as an office, creative space, garden room, or gym.
LARGE SLEEP
A self-contained cabin with everything required for modern living, the large sleep cabin can be used as an additional dwelling or for hospitality.


Easy Assembly and Swift Delivery
Every Niwa cabin is engineered for quick and simple assembly by a small team, making it possible to establish your cabin within days of delivery. Orders are typically fulfilled within just a few months. Optional furniture packages from Koto’s interior design team provide a curated experience, blending function with beauty.

