Real Estate and Sanborn Fire Insurance Atlases

These show Denver structures as early as 1887 and will help you to date the construction of a building and give you a picture of neighborhood development. When using the early maps and atlases, remember that many streets have had several different names over the years.

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Legal description

These atlases will also show the legal description of your property - Addition name, Block number, and Lot number(s). You will need this in order to try to locate an original building permit and/or trace the chain of property ownership.