The European bu d ng stock s mature, and expand ng c t es need nc us ve and nnovat ve renovat on so ut ons for a c t zens wh e ntens fy ng c ty dens f cat on. The European project EU-GUGLE a ms to reduce pr mary energy consumpt on by 40% to 80% and ncrease renewab e energy use by 25% through near y zero energy bu d ng renovat on mode s for n t at ng arge-sca e, Europe-w de rep cat on n c t es and commun t es. About 200,000 m² of res dent a and pub c bu d ngs are be ng refurb shed by mp ement ng a ba anced m x of techn ca , soc o-econom c and f nanc a so ut ons adapted to oca needs. S x EU partner c t es are part c pat ng, each rev ta z ng an urban d str ct: Aachen, Brat s ava, M an, Sestao, Tampere, and V enna. The comprehens ve ntegrated approach used n EU-GUGLE s n ne w th the European Smart C ty n t at ve, and each part c pat ng c ty has created near y zero-energy Smart C ty master p ans based upon owest energy therma renovat ons coup ed w th nnovat ve renewab e energy serv ces ncorporat ng every aspect of smart d str ct fe. A stages of the p ann ng, construct on and post-occupancy phases of the arge-sca e d str ct renewa s are be ng documented, mon tored and eva uated to create susta nab e d str ct renovat on methodo og es for "smart renovat ons for smart c t es" to meet the object ves of the European Comm ss on s Smart C t es and Commun t es In t at ve for reduc ng 40% of greenhouse gas em ss ons w th n the European Un on by 2020. The paper out nes the approach each c ty has taken and h gh ghts case stud es of the nd v dua so ut ons created n three of the s x c t es.