text: Builders' Merchant - Die2nite Wiki
  [v · e] 1111 Builders' Merchant
  This major building provides the means to build more advanced houses.
  Blueprints Blueprint Construction Blueprint (very rare!) very rare!
  Resource cost Patchwork Beam×10 Metal Support×10 Handful of nuts and bolts×3
  When the end is near and the Town Gates Town Gates are for sure going to fall tonight, a consensus with the whole town will help you selfishly upgrade your own Home Home into something more grand and safer. Build this when you are tired of living and feel like dancing on the end of a rope :)
  Building this allows you to upgrade your home as many times as possible (otherwise max once per day), and your home to unlock upgrades pass House House. If you do not have this built then you are not able to build Safehouse Safehouse.