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Ellipsearchitecture

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(...) architecture
ellipsearchitecture
is based in Lausanne.

09/10/2026

(082) jorat

The project pairs a major energy retrofit based on bio-sourced insulation with the conversion of the single-family home into a two-story co-housing unit.

Enveloped in a 35 cm layer of shuttered hempcrete, the building acquires a new identity while maintaining a cohesive volume. To elegantly integrate the increased thickness of this external insulation, a custom-designed, beveled terracotta framing detail was developed. This bespoke element boldly addresses the connection between solid and void, while concealing within its depth the technical components for the blinds and ventilation systems.

The original roof structure is preserved, reinforced, and revealed on the upper floor. Generous eaves protect the insulation from the elements and shield the occupants from summer overheating. Placed above the structure (sarking insulation), the thermal barrier allows for the design of highly slender eaves, which serve as a precise base for the photovoltaic tiles.

In this way, the properties and constraints of natural materials become a source of inspiration for shaping innovative technical solutions, while offering an opportunity to re-examine the architectural language.

25/09/2026

(049)becque

House extension, 2021-2024, La Tour-de-Peilz CH

Opposed to the concept of Tabula-rasa, the volumetric composition is a tool to apprehend the densification of suburban areas often reserved for individual housing. A wall in rammed-earth acts as a link and separation between 2 housing units. The first, existing, faces the landscape, the second, added, develops along the wall in the form of sequence of spaces towards the lake and its falling mountains, keeping a low profile in the topography. In a first phase of construction in 2024, the existing house will be enlarged while incorporating the elements of the future extension. The project doesn't stop with the realization, but prefigures and integrates a future vision of densification. How to intervene in a sensitive way in order to allow a new cohabitation and to rethink the spaces according to the lifestyles?

28/08/2026

(077) Aile Sud

The south wing of the Château de Mollens dates back to the first half of the 18th century, forming part of an asymmetrical layout composed of a central corps and two lateral wings. Originally housing an oven and a press, this building was later converted into a cabinet before being altered in the 19th century—during the reconstruction of the central corps—to accommodate residential quarters. This final transformation introduced an enfilade layout, which has become the defining characteristic of the restoration project.

The architectural approach focuses on preserving the original spatial layout and decorative features (moldings, woodwork) while retaining the traces of successive historical alterations. More extensive interventions, such as the integration of the staircase or the creation of occasional double-height spaces, are concentrated in the areas most weathered by time.

To bring this history-rich site to life, the architectural design navigates a permanent balance between different eras and their techniques. It is these subtle ambiguities that create its beauty, standing in direct contrast to a unilateral, uncompromising vision.

07/08/2026

(075) martinet

Guided by the principle of gentle densification, the extension project takes root within the lines of the existing building. For reasons of constructive and economic efficiency, the new walls extend the original structure while asserting a distinct, new materiality. Preserving the floors and gables maintains the architectural identity of the site while avoiding costly demolitions.

Originally designed as a single-family villa, the building is now envisioned to allow for future spatial division and co-housing. The new wooden facade expresses this modularity while revealing the underlying structural principles.

In a constrained economic and regulatory environment, is not the architect’s greatest resource the existing built heritage?

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http://www.ellipsearchitecture.ch/

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