There are many homes under renovation in Vancouver - that would seem to be a good thing. CHOA e updates for B.C. has an article that is entitled " Managing Environmental Risks During a Renovation. Further, the Recycling Council of B.C. has a recycling hotline. All of those materials to be replaced need not end up in a dumpster - some can be recycled. I have seen where hardwood floors are listed on Craigslist or Kijiji, for instance, and of course copper and other metals can be sold as well.The Homeowner Protection Office (HPO) has produced a Consumer Guide to Window and Door Replacement. Rising energy costs, drafts, condensation and aging appearance are an indication that doors and windows require replacement. These are just a few contacts for anyone starting a renovation and making plans. CMHC has a website with valuable tips as well.