EPISO 4 and STAM will use the site to build a five-storey office building in Val-de-Fontenay. : Tristan Capital Partners’s value-add real estate fund has joined forces with STAM Europe to buy an office development site in France’s capital. Tristan’s €1.5bn European Property Investors Special Opportunities IV (EPISO 4) and STAM’s joint venture will use the site to build a five-storey office building providing 14,500sqm of prime office space in Val-de-Fontenay. The partners will carry out the construction alongside developer BPD Marignan. STAM will be responsible for asset management.