To reach the COP21 goal of nearly-zero energy, zero emission buildings MBLabs Labs strives to unleash the innovation potential of the SMEs of the Construction sector by lowering the entry barriers to test innovative solutions in a network of testing facilities in RTOs and Living Labs in 13 countries, most EU member states (ES, FR, BE, IT, DE, TR, UK, LU, PL, SE, HU, AT, IE) allowing a direct feedback from the end-users during the final development stages. The MBLabs concept consists of 5 innovation pillars: 1) SME outreach by metaclustering & Open Innovation Digital Platform as cornerstones to engage and support SMEs in innovation and testing based on the networks of MBLabs’ 40 consortium partners, targeting over 180 clusters and building upon the sister H2020 METABUILDING project which reaches out to 9000 SME cluster members. 2) OITB Brokerage Business Model: the SEP will be a light brokerage structure in the form of an association - with the consortium partners as members - that serves as a business provider to entities running testing facilities and/or providing innovation services for building envelopes and finances itself through membership fees, adapted to the size and financial capacities of its members, market place revenues and a commission for the brokerage service. 3) Harmonised testing framework for building products development: consisting of guidelines for the characterization of smart/active systems, a detailed and validated energy model and LCAs to assure the application of EU regulatory practices. 4) O3 Building Envelope Testbench (standardized, replicable, affordable, Digital Twin enabled): first fully replicable, standardised, cost-effective Open Source/Open Data/Open Access Building Envelope Testbed enabling virtual testing and made available (co-funded) to some of the project partners. 5) Streamlined access to Living Labs & pilot matchmaking: with a single-entry point, an innovative matchmaking module and standardised internal procedures.