20 • XX
In numerology, the number 20 is synonymous with harmony and balance, embodies the requirement and stimulates intuition.
These complementary features are all the DNA of our decoration studio. Like a symbolic figure, the number 20 is obviously drawn.
OSCAR LUCIEN ONO
After an initial career, notably in London, Oscar Lucien Ono founded Maison Numéro 20 in 2014 — an interior architecture and haute decoration studio based in Saint-Germain-des-Prés, at the crossroads of art, design, and quintessential French style.
In the tradition of master decorators, he represents a new generation of interior architects capable of blending contemporary creativity with decorative heritage. His distinctive style plays with eras, decorative arts, and historical references — from the 1930s to the bold, graphic spirit of the 1970s — to create a contemporary classic that is daring, refined, and full of character.
With a degree in art history, Oscar Lucien Ono builds his projects like sensitive narratives, carefully composed spaces where every material, texture, and light contributes to an emotionally resonant design story. He collaborates with the finest artisans to bring interiors to life with meticulously orchestrated details.
“Oscar Lucien Ono embodies the new chic of interior architecture.” — Madame Figaro
“He is the new generation of designers reinventing Parisian chic.” — Palascope
Between a passionate love for the decorative arts and a contemporary vision of excellence, Maison Numéro 20 celebrates the elegance of craftsmanship, the richness of savoir-faire, and a vibrant, sophisticated idea of French luxury.
Dream, make you dream, transmit, share, to be respectful of heritage, of traditions and know-how while providing innovation and modernity. A questionning of real sense of design which isn’t superficial, this is the idea we have of our job as a designer.
LE STUDIO
Excellence, Art de Vivre & Savoir-Faire
At Maison Numéro 20, excellence comes to life.
Built around a core team of twenty talents — project managers, designers, an art director, and studio lead — we combine precision, organization, and creativity to craft unique interiors that balance understated elegance with bold sophistication.
Driven by a deep passion for aesthetics and the French art of living, we shape spaces that tell a story, stir emotion, and leave a lasting impression.
Our experience in luxury residential and 4- and 5-star hospitality allows us to elevate every project with meticulous attention to detail, delivering more than just a setting — a true signature.
A RIVE GAUCHE SIGNATURE
The Art of Detail, the Soul of the Gesture
At Maison Numéro 20, a deep passion for the decorative arts and fine craftsmanship lies at the heart of every project. Giving meaning to a space means honoring the hand’s work, revealing the beauty of the gesture, and elevating the vision of our decorators.
As an ambassador of the Réseau Excellence, Oscar Lucien Ono is actively involved in promoting exceptional craftsmanship. This network brings together EPV-certified companies — Entreprises du Patrimoine Vivant, a distinction awarded by the French State to maisons that embody rare, mastered, and time-honored savoir-faire.
We collaborate with these elite artisans — glassmakers, marquetry experts, cabinetmakers, decorative painters, plaster workers, and specialists in metalwork and decorative finishes — whose virtuosity and passion shape spaces that are sensitive, unique, and full of life.
Every gesture matters. Every detail tells a story. Each project becomes a true work of art — the result of a dialogue between hand, material, and vision.