Almost every practical astronomer eventually aspires to have a fixed, permanent observatory for his or her telescope. A roll-off roof or dome observatory is the answer for the most popular home observatory design. Building a Roll-Off or Dome Observatory will help you decide whether to embark on the venture and will certainly increase your enthusiasm for the project. The author, both an amateur astronomer and a professional landscape architect, answers many of the common questions asked about observatory construction, covering the following topics: * Zoning, and by-law requirements common to most states, towns and municipalities * Where to locate the observatory * How to tailor the observatory for your particular needs * Tools and structural components required * Possible variations in design * How to combine the structure with other structures (incorporating a garden patio under the gantry in the roll-off roof observatory, for example) This fully detailed outlines step-by-step construction, with professional detailed diagrams for each phase of construction.