ARQ1TO1 - Rosario Alas Architecture & Interiors

Interior architect office Cascais ARQ1TO1 – Rosario Alas Architecture & Interiors presents a portfolio of renovation, interior design, decoration and furniture-concept projects. Based at Casa da Guia in Cascais, the studio’s recent work includes homes, apartments, hospitality spaces and real-estate offices.

Its Cascais projects include a complete renovation, an Intercontinental Hotel Residence apartment, a boutique hotel, a Costa da Guia apartment makeover and a villa in Quinta da Marinha. The portfolio also features a villa transformation in Penha Longa and an apartment decoration project designed for holiday rentals in Costa da Guia.

Beyond Cascais, ARQ1TO1 has worked on projects in Lisbon, Sintra, Monte Estoril, the Algarve and Alentejo. Examples include hotel renovations, a Hilton Resort furniture concept, residential renovations and a high-end villa in Vale do Lobo.

The studio’s published work reflects an approach spanning complete transformations and decoration projects across residential, rental and hospitality settings.