The project
Kelly Hoppen sets the interior language. Kas Bordier sets the longevity specification. Eight rooms. Ten domains. One hundred and twenty-nine measurable factors. Every choice that meets the body, the air it breathes, the water it drinks, the light it stands in, the sound it sleeps under, documented and cited.
The brief is calm interiors that happen to be measurably healthier. The test is whether a body sleeps deeper, recovers faster, and stays clearer inside this house than the next one. The Diagnostic carries the answer forward in numbers; the rooms carry it forward in atmosphere.
Interior Designer, Founder of Kelly Hoppen Creatives
Five decades of interiors that taught the world, what calm looks like. East-meets-West in tone, scale, and silence. Her work spans private homes, villas, ski chalets, yachts and private jets, as well as hotels, beach clubs, cruise ships, residential towers and large-scale developments around the world.
Founder, MAVI World
A framework that translates two decades of longevity research into a measurable specification for the home. Ten domains, one hundred and twenty-nine factors, every recommendation cited.
MAVI × Kelly Hoppen
MAVI's science-led Longevity Architecture framework is now available with interiors by Kelly Hoppen CBE.
Having changed the face of the design industry, multi-award winning designer Kelly Hoppen CBE is one of the most sought-after designers of her generation. Known for an ever-evolving style characterised by clean lines, neutral tones with a considered use of colour, and meticulous attention to detail, her work spans private homes, hotels, prime residential and commercial developments, yachts and private jets worldwide.
Every MAVI × Kelly Hoppen project integrates MAVI's Longevity Architecture methodology, embedding multiple measurable health factors, from air quality and light spectrum to acoustics, sleep optimisation and nervous system regulation, invisibly into an aesthetic that is unmistakably Kelly Hoppen.
Available to private homeowners, hoteliers and commercial developers seeking the highest standard of design, where aesthetic excellence and biological performance go hand in hand.
How we work together
Two practices, one residence. The interior language and the longevity specification are written together, room by room, so the home delivers on both atmosphere and biology without compromise on either side.
Kelly Hoppen CBE
Five decades of refined, restrained luxury defined by a calm, neutral design language. A signature approach shaped by materiality, proportion and atmosphere, drawing on an East-meets-West sensibility that has influenced high-end residential and hospitality interiors around the world.
MAVI
Ten domains, one hundred and twenty-nine measurable factors. Air, water, light, sound, temperature, materials, microbiology, technology, mind, and habits, each cited to peer-reviewed thresholds.
Together
One brief, one Diagnostic, one residence. Calm interiors that happen to be measurably healthier, with every recommendation traceable to a published source and a tested intervention.
The first breath the home takes for you.
Warm 2700 K downlight minimises the cortisol spike of arrival. Curved contours and diffuse acoustics keep the nervous system regulated; integrated shoe storage removes 30–40% of tracked-in contaminants before the body crosses the threshold.
Sensory transition, calmly engineered.
Filtered light mimics dappled sunlight to lower cortisol; the marble-to-wood transition gives the nervous system measured sensory variation without overstimulation. Bonsai groupings purify the air and hold humidity between 40 and 60%.
Design is psychology made visible.
Skylights advance sleep onset by twenty-two minutes. Double-layered walls hold ambient noise below 45 dB. The moss wall regulates humidity and reduces cortisol; dual seating gives the body autonomic choice between connection and parasympathetic rest.
The metabolic centre.
Task light calibrated to 500+ lux protects against eye strain and cortisol spikes. Warm ambient at 2700–3000 K shields evening melatonin. The open island and the intimate table give the household a low-pressure connection space and a focused dining surface in one room.
Every meal is a circadian instruction.
Dimmable pendants align with meal timing, bright by day and warm by evening. Three lights in repetition reduce cognitive load. Rounded furniture removes the micro-stress of sharp angles and signals safety to the brain.
A room the body can rest in.
Acoustic design lowers heart rate by 5–7%. Curved walls and forms reduce stress ratings by 8–12% and the visual access to greenery cuts cortisol by up to 12%. Low-frequency vibrations slow breathing and heart rate within twenty minutes.
The room that builds tomorrow.
Temperature held at 18–22 °C improves sleep efficiency by 5–10%. Blue-enriched morning light advances circadian rhythm; amber evening light protects melatonin. Acoustic design below 30 dB and a wrapped bed with headboard and side panels deliver an evolutionary safety response.
The most chemical room, softened.
A circular skylight delivers morning light during bathing to advance circadian rhythm. Wood panelling holds humidity and absorbs VOCs. Evening lighting at 1800–2200 K dims to protect melatonin in the pre-sleep window; heat exposure raises HRV and brings heart rate from 77 to 68 bpm during recovery.
As featured in the Financial Times House & Home, 5 May 2026
Rebecca Newman profiles the emerging discipline of longevity architecture, with Kas Bordier, Kelly Hoppen CBE, Shouka Amirsolimani and Dr Tamsin Lewis. Methodology, pricing, and the live projects across London, Switzerland, and the Pacific Palisades.
Longevity architecture should become a standard for the industry, with people looking at the health rating of the space the same way as the energy rating. Kas Bordier, founder, MAVIRead the article
Eight rooms, ten domains, one hundred and twenty-nine measurable factors. Realised in collaboration with Kelly Hoppen CBE.