Stone-clad retreat nestled in rocky hillside overlooking Aegean Sea.

Stone-Carved Sanctuaries: Mold Architects’ Innovative Retreat on Serifos Island

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Written by John Oliver

2026-07-03

Crafting with Nature: The Perma Retreat

On the island of Serifos, Mold Architects has unveiled an exceptional hospitality retreat that communes with its rugged Greek landscape. Named Perma, this project ingeniously incorporates five guest residences, constructed from the very stone excavated from its coastal hillside setting, offering panoramic views of the Aegean Sea.

A Harmonious Union of Land and Architecture

Instead of altering the natural hillside, the architects utilized the extracted materials, crafting an exquisite blend of architecture and environment. The site comprises stone-clad units nestled within stepped terraces, interwoven with tranquil pools and verdant courtyards.

Perma retreat features five guest residences with Aegean Sea views.
Mold Architect’s Perma retreat comprises five guest residences overlooking the Aegean Sea

“Using the earth as primary material was central to the project’s ethos,” said Iliana Kerestetzi, founder of Mold Architects. This innovative approach transforms traditional building endeavors into an eco-conscious retreat, diverging from conventional hotel experiences by highlighting self-contained residences that prioritize privacy.

Buildings connected by planted roofs and water-filled courtyards.
Planted roofs and water-filled courtyards are woven between the buildings

Modern Elegance in Timeless Surroundings

Comprised of four stone structures, the retreat accommodates three expansive 60-square-meter units and two smaller suites. Each residence features an outdoor sanctuary complete with a private pool, dining terrace, and kitchen, seamlessly connecting guests to the picturesque island terrain.

Retreat terraces arranged in steps along the hillside.
The retreat is arranged across stepped terraces following the hillside

The interiors maintain a minimalistic elegance, with built-in furnishings and concrete floors accentuating the surrounding natural beauty. Sliding glass doors blend indoor and outdoor spaces, offering uninterrupted views of surrounding courtyards and the sea.

A Journey Through Nature

Guests journey through a series of pathways and terraces before reaching their accommodations, experiencing a gradual transition from the island’s expansive landscapes to intimate private spaces. This thoughtful design follows the land’s natural contours, aligning vistas with the distant horizon.

Accommodation units separated by water-filled courtyards.
Water-filled courtyards separate the accommodation units

“The arrangement echoes the natural slope, turning towards the sea,” explained Kerestetzi. Exposed concrete beams form a structural grid accentuating the retreat’s open-air concepts, while reed screens offer shade and allow refreshing breezes to flow through.

Sustainable Living in the Cyclades

Mold Architects employed passive cooling methods ideal for the Cycladic climate, incorporating shaded courtyards and verdant roofs. A biological wastewater treatment system and photovoltaic solar panels underscore the retreat’s commitment to sustainability, making it a model of eco-luxurious living.

Explore a unique approach to biophilic design at Playa Viva, a sustainable resort that emphasizes nature-oriented architecture.

Interiors feature built-in furnishings with minimalist material finishes.
The interiors feature built-in furnishings and restrained material finishes

The result of Kerestetzi’s vision is a sanctuary that merges modern design and natural beauty, perfectly tailored for reflection and reconnection with nature.

For another example of blending architecture with its surroundings, the modern mud house in Hosur showcases local craftsmanship in harmony with nature.

Buildings oriented towards sea, adapting to site contours.
The buildings were rotated towards the sea while following the contours of the site

Photography by Giorgos Sfakianakis highlights the harmonious integration of architecture and landscape. This retreat on Serifos sets new standards for ecological and experiential hospitality.

Residences align with views towards the island of Vous.
The residences are oriented towards views of the island of Vous
Concrete grid organizes courtyards, roofs, and accommodation units.
A concrete grid organises courtyards, planted roofs and accommodation units
Passive cooling includes planted roofs, pergolas, and shaded courtyards.
Passive cooling strategies include planted roofs, pergolas and shaded courtyards
Private outdoor areas integrate pools, terraces, and plants.
Private outdoor spaces combine pools, terraces and planting

Source: dezeen.com