Obtain a list of blueprint symbols and familiarize yourself with the set of standard symbols (see Resources). These are commonly used along the blueprint pages and each indicates different items such as doors, ducts, and electrical components. Symbol legends are also often provided with the blueprint packages.
Look over and familiarize yourself with the blueprint's package first page. The blueprint package generally has multiple pages, and the first page is usually a general idea of the property the blueprints are for, as well as the general layout. The first page should contain a sketch of the entire property.
Examine the four exterior elevation sheets. Although these sheets resemble the first cover page of the blueprint package, they are usually drawn to a 1/4 scale. Generally 1/4 inch on the blueprint represents 1 foot of actual length. However, this may vary depending on the blue print. Find the legend or scale on the blueprint page to determine the scale. Each page represents one side of the property.
Read the blueprint information on the exterior elevation sheets. These will include detailed specific information on the property such as exterior finishes and the roof pitch.
Examine the foundation or basement page included in the blueprints. These pages will contain information on the basement structure and primary foundation points of the property such as which areas have been excavated, as well as where support walls will be placed.
Read over the layout pages blueprints that show where the electrical components of the home will be. These sheets are also drawn at a 1/4 scale and should have a legend that explains what the electrical symbols stand for. The plumbing blueprints may also be included and have their own symbols and legend.
Examine the cross section, and interior elevation pages of the blueprint package. The interior elevation pages describe any additional structures for the property including cabinets and fireplaces, as well as other structures not included in previous pages. The cross section pages are usually drawn at a larger scale such as 1/2 due to their detail. They usually show the property in more detail and specifics.