Measure the potential building site and become familiar with building codes in your neighborhood. These two factors have a significant impact on the project you select and construct. Determine how tall your project can be and how much square footage it will enclose. Assess your carpentry skills.
Choose the building materials you'll use for your project. Victorian greenhouses and conservatories can be framed from rot-resistant wood, aluminum, PVC pipe, or traditional cast iron. Glazing, the clear portion that admits light, can be traditional glass or a modern synthetic such as acrylic sheets or polyethylene film.
Measure and cut the framing materials using a measuring tape, indelible marker and saw, if the frame is wood or PVC. Metal frames are usually best purchased ready-made. Erect the frame using screws and nails as fasteners with a screwdriver and hammer.
Measure and cut the glazing material into pieces that fit the frame. A special cutter must be used with glass. A saw cuts acrylic easily. If using polyethylene film, a heavy pair of sharp scissors makes short work cutting it to size.
Attach the glazing material to the frame. Glazier's points and glass putty are required if using glass panes. Screws work better than nails when installing acrylic. Heavy-duty tape that can withstand outdoor conditions makes a good seal when using polyethylene sheets.