About
DUO Building

Fine contour sketch of construction workers and upright reinforcement rods.

DUO Group is a Portuguese construction company dedicated to advanced ICF building systems. We work with people building their homes and with clients who need a structure delivered with care, clear schedules and steady communication throughout the build.

Whether we deliver the structure, prepare a home for finishing or complete a turnkey build, we keep the work aligned with the architectural project and the agreed scope.

Illustrative man and woman seen from behind reviewing plans at an ICF construction site, wearing grey tops, white hardhats and yellow reflective vests with DUO Building logos on their backs.

Our mission

To build efficient, comfortable and durable homes, using modern construction systems with technical rigour and transparency at every stage.

Our vision

To become a national reference for ICF construction, helping create more efficient housing that is ready for the future.

Our construction team.

Our own team stays closely involved with every project, from initial planning through to handover. We focus on construction details and the long-term performance of the home.

Our specialist technical team includes engineers who can analyse and adapt architectural projects for construction using the ICF system.

Our current focus is Greater Lisbon and Margem Sul.

Explore our services

Building ICF homes in Portugal for over five years.

Working together.

  1. Your first idea

    Have a plot of land? Tell us what you want to build, whether you already have architectural plans or still need to develop a design.

  2. A clear proposal

    Our specialists will analyse your architectural plans and adapt the design for construction using the ICF system. We’ll then outline the work, handover stage and estimated cost in a written proposal.

  3. Construction

    Our team builds your ICF structure and carries out the agreed construction work, coordinating trades and checking quality at each stage.

  4. Handover

    We review the completed scope together and hand over the relevant project documentation.

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